feat: add installer and enable app selection from storage (#2)

android/app/build.gradle

@@ -44,11 +44,10 @@ android {
 
     defaultConfig {
         applicationId "app.revanced.manager"
-        minSdkVersion flutter.minSdkVersion
+        minSdkVersion 21
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
-        multiDexEnabled true
     }
 
     buildTypes {
@@ -64,8 +63,11 @@ flutter {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation "com.android.support:multidex:1.0.3"
 
     // ReVanced
     implementation "app.revanced:revanced-patcher:3.3.1"
+
+    // Signing & aligning
+    implementation("org.bouncycastle:bcpkix-jdk15on:1.70")
+    implementation("com.android.tools.build:apksig:7.2.1")
 }

android/app/src/main/AndroidManifest.xml

@@ -4,6 +4,10 @@
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
+    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
    <application
         android:label="ReVanced Manager"
         android:name="${applicationName}"
@@ -29,5 +33,15 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+        <service android:name="com.pravera.flutter_foreground_task.service.ForegroundService" />
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileProvider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
     </application>
 </manifest>

android/app/src/main/kotlin/app/revanced/manager/MainActivity.kt

@@ -1,6 +1,13 @@
 package app.revanced.manager
 
 import androidx.annotation.NonNull
+import app.revanced.manager.utils.Aapt
+import app.revanced.manager.utils.aligning.ZipAligner
+import app.revanced.manager.utils.signing.Signer
+import app.revanced.manager.utils.zip.ZipFile
+import app.revanced.manager.utils.zip.structures.ZipEntry
+import app.revanced.patcher.Patcher
+import app.revanced.patcher.PatcherOptions
 import app.revanced.patcher.data.Data
 import app.revanced.patcher.extensions.PatchExtensions.compatiblePackages
 import app.revanced.patcher.extensions.PatchExtensions.description
@@ -12,20 +19,26 @@ import dalvik.system.DexClassLoader
 import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.MethodChannel
+import java.io.File
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
 
 class MainActivity : FlutterActivity() {
-    private val CHANNEL = "app.revanced/patcher"
+    private val CHANNEL = "app.revanced.manager/patcher"
     private var patches = mutableListOf<Class<out Patch<Data>>>()
+    private val tag = "Patcher"
+    private lateinit var methodChannel: MethodChannel
+    private lateinit var patcher: Patcher
 
     override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)
-        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler { call, result ->
+        methodChannel = MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL)
+        methodChannel.setMethodCallHandler { call, result ->
             when (call.method) {
                 "loadPatches" -> {
                     val pathBundlesPaths = call.argument<List<String>>("pathBundlesPaths")
                     if (pathBundlesPaths != null) {
-                        loadPatches(pathBundlesPaths)
-                        result.success("OK")
+                        result.success(loadPatches(pathBundlesPaths))
                     } else {
                         result.notImplemented()
                     }
@@ -36,7 +49,61 @@ class MainActivity : FlutterActivity() {
                     val targetVersion = call.argument<String>("targetVersion")
                     val ignoreVersion = call.argument<Boolean>("ignoreVersion")
                     if (targetPackage != null && targetVersion != null && ignoreVersion != null) {
-                        result.success(getFilteredPatches(targetPackage, targetVersion, ignoreVersion))
+                        result.success(
+                                getFilteredPatches(targetPackage, targetVersion, ignoreVersion)
+                        )
+                    } else {
+                        result.notImplemented()
+                    }
+                }
+                "copyInputFile" -> {
+                    val originalFilePath = call.argument<String>("originalFilePath")
+                    val inputFilePath = call.argument<String>("inputFilePath")
+                    if (originalFilePath != null && inputFilePath != null) {
+                        result.success(copyInputFile(originalFilePath, inputFilePath))
+                    } else {
+                        result.notImplemented()
+                    }
+                }
+                "createPatcher" -> {
+                    val inputFilePath = call.argument<String>("inputFilePath")
+                    val cacheDirPath = call.argument<String>("cacheDirPath")
+                    if (inputFilePath != null && cacheDirPath != null) {
+                        result.success(createPatcher(inputFilePath, cacheDirPath))
+                    } else {
+                        result.notImplemented()
+                    }
+                }
+                "mergeIntegrations" -> {
+                    val integrationsPath = call.argument<String>("integrationsPath")
+                    if (integrationsPath != null) {
+                        result.success(mergeIntegrations(integrationsPath))
+                    } else {
+                        result.notImplemented()
+                    }
+                }
+                "applyPatches" -> {
+                    val selectedPatches = call.argument<List<String>>("selectedPatches")
+                    if (selectedPatches != null) {
+                        result.success(applyPatches(selectedPatches))
+                    } else {
+                        result.notImplemented()
+                    }
+                }
+                "repackPatchedFile" -> {
+                    val inputFilePath = call.argument<String>("inputFilePath")
+                    val patchedFilePath = call.argument<String>("patchedFilePath")
+                    if (inputFilePath != null && patchedFilePath != null) {
+                        result.success(repackPatchedFile(inputFilePath, patchedFilePath))
+                    } else {
+                        result.notImplemented()
+                    }
+                }
+                "signPatchedFile" -> {
+                    val patchedFilePath = call.argument<String>("patchedFilePath")
+                    val outFilePath = call.argument<String>("outFilePath")
+                    if (patchedFilePath != null && outFilePath != null) {
+                        result.success(signPatchedFile(patchedFilePath, outFilePath))
                     } else {
                         result.notImplemented()
                     }
@@ -46,42 +113,126 @@ class MainActivity : FlutterActivity() {
         }
     }
 
-    fun loadPatches(pathBundlesPaths: List<String>) {
-        pathBundlesPaths.forEach { path ->
-            patches.addAll(DexPatchBundle(
-                path, DexClassLoader(
-                    path,
-                    context.cacheDir.path,
-                    null,
-                    javaClass.classLoader
+    fun loadPatches(pathBundlesPaths: List<String>): Boolean {
+        try {
+            pathBundlesPaths.forEach { path ->
+                patches.addAll(
+                        DexPatchBundle(
+                                        path,
+                                        DexClassLoader(
+                                                path,
+                                                context.cacheDir.path,
+                                                null,
+                                                javaClass.classLoader
+                                        )
+                                )
+                                .loadPatches()
                 )
-            ).loadPatches())
+            }
+        } catch (e: Exception) {
+            return false
         }
+        return true
     }
 
     fun getCompatiblePackages(): List<String> {
         val filteredPackages = mutableListOf<String>()
         patches.forEach patch@{ patch ->
-            patch.compatiblePackages?.forEach { pkg ->
-                filteredPackages.add(pkg.name)
-            }
+            patch.compatiblePackages?.forEach { pkg -> filteredPackages.add(pkg.name) }
         }
         return filteredPackages.distinct()
     }
 
-    fun getFilteredPatches(targetPackage: String, targetVersion: String, ignoreVersion: Boolean): List<Map<String, String?>> {
+    fun getFilteredPatches(
+            targetPackage: String,
+            targetVersion: String,
+            ignoreVersion: Boolean
+    ): List<Map<String, String?>> {
         val filteredPatches = mutableListOf<Map<String, String?>>()
         patches.forEach patch@{ patch ->
             patch.compatiblePackages?.forEach { pkg ->
-                if (pkg.name == targetPackage && (ignoreVersion || pkg.versions.isNotEmpty() || pkg.versions.contains(targetVersion))) {
-                    var p = mutableMapOf<String, String?>();
-                    p.put("name", patch.patchName);
-                    p.put("version", patch.version);
-                    p.put("description", patch.description);
+                if (pkg.name == targetPackage &&
+                                (ignoreVersion ||
+                                        pkg.versions.isNotEmpty() ||
+                                        pkg.versions.contains(targetVersion))
+                ) {
+                    var p = mutableMapOf<String, String?>()
+                    p.put("name", patch.patchName)
+                    p.put("version", patch.version)
+                    p.put("description", patch.description)
                     filteredPatches.add(p)
                 }
             }
         }
         return filteredPatches
     }
+
+    private fun findPatchesByIds(ids: Iterable<String>): List<Class<out Patch<Data>>> {
+        return patches.filter { patch -> ids.any { it == patch.patchName } }
+    }
+
+    fun copyInputFile(originalFilePath: String, inputFilePath: String): Boolean {
+        val originalFile = File(originalFilePath)
+        val inputFile = File(inputFilePath)
+        Files.copy(originalFile.toPath(), inputFile.toPath(), StandardCopyOption.REPLACE_EXISTING)
+        return true
+    }
+
+    fun createPatcher(inputFilePath: String, cacheDirPath: String): Boolean {
+        val inputFile = File(inputFilePath)
+        val aaptPath = Aapt.binary(context).absolutePath
+        patcher = Patcher(PatcherOptions(inputFile, cacheDirPath, true, aaptPath, cacheDirPath))
+        return true
+    }
+
+    fun mergeIntegrations(integrationsPath: String): Boolean {
+        val integrations = File(integrationsPath)
+        if (patcher == null) return false
+        patcher.addFiles(listOf(integrations)) {}
+        return true
+    }
+
+    fun applyPatches(selectedPatches: List<String>): Boolean {
+        val patches = findPatchesByIds(selectedPatches)
+        if (patches.isEmpty()) return false
+        if (patcher == null) return false
+        patcher.addPatches(patches)
+        patcher.applyPatches().forEach { (patch, result) ->
+            if (result.isSuccess) {
+                val msg = "[success] $patch"
+                methodChannel.invokeMethod("updateInstallerLog", msg)
+                return@forEach
+            }
+            val msg = "[error] $patch:" + result.exceptionOrNull()!!
+            methodChannel.invokeMethod("updateInstallerLog", msg)
+        }
+        return true
+    }
+
+    fun repackPatchedFile(inputFilePath: String, patchedFilePath: String): Boolean {
+        val inputFile = File(inputFilePath)
+        val patchedFile = File(patchedFilePath)
+        if (patcher == null) return false
+        val result = patcher.save()
+        ZipFile(patchedFile).use { file ->
+            result.dexFiles.forEach {
+                file.addEntryCompressData(
+                        ZipEntry.createWithName(it.name),
+                        it.dexFileInputStream.readBytes()
+                )
+            }
+            result.resourceFile?.let {
+                file.copyEntriesFromFileAligned(ZipFile(it), ZipAligner::getEntryAlignment)
+            }
+            file.copyEntriesFromFileAligned(ZipFile(inputFile), ZipAligner::getEntryAlignment)
+        }
+        return true
+    }
+
+    fun signPatchedFile(patchedFilePath: String, outFilePath: String): Boolean {
+        val patchedFile = File(patchedFilePath)
+        val outFile = File(outFilePath)
+        Signer("ReVanced", "s3cur3p@ssw0rd").signApk(patchedFile, outFile)
+        return true
+    }
 }

android/app/src/main/kotlin/app/revanced/manager/utils/Aapt.kt

@@ -0,0 +1,12 @@
+package app.revanced.manager.utils
+
+import android.content.Context
+import java.io.File
+
+object Aapt {
+    fun binary(context: Context): File {
+        return File(context.applicationInfo.nativeLibraryDir).resolveAapt()
+    }
+}
+
+private fun File.resolveAapt() = resolve(list { _, f -> !File(f).isDirectory }!!.first())

android/app/src/main/kotlin/app/revanced/manager/utils/aligning/ZipAligner.kt

@@ -0,0 +1,11 @@
+package app.revanced.manager.utils.aligning
+
+import app.revanced.manager.utils.zip.structures.ZipEntry
+
+internal object ZipAligner {
+    private const val DEFAULT_ALIGNMENT = 4
+    private const val LIBRARY_ALIGNMENT = 4096
+
+    fun getEntryAlignment(entry: ZipEntry): Int? =
+        if (entry.compression.toUInt() != 0u) null else if (entry.fileName.endsWith(".so")) LIBRARY_ALIGNMENT else DEFAULT_ALIGNMENT
+}

android/app/src/main/kotlin/app/revanced/manager/utils/signing/Signer.kt

@@ -0,0 +1,75 @@
+package app.revanced.manager.utils.signing
+
+import com.android.apksig.ApkSigner
+import org.bouncycastle.asn1.x500.X500Name
+import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo
+import org.bouncycastle.cert.X509v3CertificateBuilder
+import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter
+import org.bouncycastle.jce.provider.BouncyCastleProvider
+import org.bouncycastle.operator.ContentSigner
+import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder
+import java.io.File
+import java.io.FileInputStream
+import java.io.FileOutputStream
+import java.math.BigInteger
+import java.security.*
+import java.security.cert.X509Certificate
+import java.util.*
+
+internal class Signer(
+    private val cn: String, password: String
+) {
+    private val passwordCharArray = password.toCharArray()
+    private fun newKeystore(out: File) {
+        val (publicKey, privateKey) = createKey()
+        val privateKS = KeyStore.getInstance("BKS", "BC")
+        privateKS.load(null, passwordCharArray)
+        privateKS.setKeyEntry("alias", privateKey, passwordCharArray, arrayOf(publicKey))
+        privateKS.store(FileOutputStream(out), passwordCharArray)
+    }
+
+    private fun createKey(): Pair<X509Certificate, PrivateKey> {
+        val gen = KeyPairGenerator.getInstance("RSA")
+        gen.initialize(2048)
+        val pair = gen.generateKeyPair()
+        var serialNumber: BigInteger
+        do serialNumber =
+            BigInteger.valueOf(SecureRandom().nextLong()) while (serialNumber < BigInteger.ZERO)
+        val x500Name = X500Name("CN=$cn")
+        val builder = X509v3CertificateBuilder(
+            x500Name,
+            serialNumber,
+            Date(System.currentTimeMillis() - 1000L * 60L * 60L * 24L * 30L),
+            Date(System.currentTimeMillis() + 1000L * 60L * 60L * 24L * 366L * 30L),
+            Locale.ENGLISH,
+            x500Name,
+            SubjectPublicKeyInfo.getInstance(pair.public.encoded)
+        )
+        val signer: ContentSigner = JcaContentSignerBuilder("SHA256withRSA").build(pair.private)
+        return JcaX509CertificateConverter().getCertificate(builder.build(signer)) to pair.private
+    }
+
+    fun signApk(input: File, output: File) {
+        Security.addProvider(BouncyCastleProvider())
+
+        val ks = File(input.parent, "revanced-cli.keystore")
+        if (!ks.exists()) newKeystore(ks)
+
+        val keyStore = KeyStore.getInstance("BKS", "BC")
+        FileInputStream(ks).use { fis -> keyStore.load(fis, null) }
+        val alias = keyStore.aliases().nextElement()
+
+        val config = ApkSigner.SignerConfig.Builder(
+            cn,
+            keyStore.getKey(alias, passwordCharArray) as PrivateKey,
+            listOf(keyStore.getCertificate(alias) as X509Certificate)
+        ).build()
+
+        val signer = ApkSigner.Builder(listOf(config))
+        signer.setCreatedBy(cn)
+        signer.setInputApk(input)
+        signer.setOutputApk(output)
+
+        signer.build().sign()
+    }
+}

android/app/src/main/kotlin/app/revanced/manager/utils/zip/Extensions.kt

@@ -0,0 +1,33 @@
+package app.revanced.manager.utils.zip
+
+import java.io.DataInput
+import java.io.DataOutput
+import java.nio.ByteBuffer
+
+fun UInt.toLittleEndian() =
+    (((this.toInt() and 0xff000000.toInt()) shr 24) or ((this.toInt() and 0x00ff0000) shr 8) or ((this.toInt() and 0x0000ff00) shl 8) or (this.toInt() shl 24)).toUInt()
+
+fun UShort.toLittleEndian() = (this.toUInt() shl 16).toLittleEndian().toUShort()
+
+fun UInt.toBigEndian() = (((this.toInt() and 0xff) shl 24) or ((this.toInt() and 0xff00) shl 8)
+        or ((this.toInt() and 0x00ff0000) ushr 8) or (this.toInt() ushr 24)).toUInt()
+
+fun UShort.toBigEndian() = (this.toUInt() shl 16).toBigEndian().toUShort()
+
+fun ByteBuffer.getUShort() = this.short.toUShort()
+fun ByteBuffer.getUInt() = this.int.toUInt()
+
+fun ByteBuffer.putUShort(ushort: UShort) = this.putShort(ushort.toShort())
+fun ByteBuffer.putUInt(uint: UInt) = this.putInt(uint.toInt())
+
+fun DataInput.readUShort() = this.readShort().toUShort()
+fun DataInput.readUInt() = this.readInt().toUInt()
+
+fun DataOutput.writeUShort(ushort: UShort) = this.writeShort(ushort.toInt())
+fun DataOutput.writeUInt(uint: UInt) = this.writeInt(uint.toInt())
+
+fun DataInput.readUShortLE() = this.readUShort().toBigEndian()
+fun DataInput.readUIntLE() = this.readUInt().toBigEndian()
+
+fun DataOutput.writeUShortLE(ushort: UShort) = this.writeUShort(ushort.toLittleEndian())
+fun DataOutput.writeUIntLE(uint: UInt) = this.writeUInt(uint.toLittleEndian())

android/app/src/main/kotlin/app/revanced/manager/utils/zip/ZipFile.kt

@@ -0,0 +1,176 @@
+package app.revanced.manager.utils.zip
+
+import app.revanced.manager.utils.zip.structures.ZipEndRecord
+import app.revanced.manager.utils.zip.structures.ZipEntry
+import java.io.Closeable
+import java.io.File
+import java.io.RandomAccessFile
+import java.nio.ByteBuffer
+import java.nio.channels.FileChannel
+import java.util.zip.CRC32
+import java.util.zip.Deflater
+
+class ZipFile(val file: File) : Closeable {
+    var entries: MutableList<ZipEntry> = mutableListOf()
+
+    private val filePointer: RandomAccessFile = RandomAccessFile(file, "rw")
+    private var CDNeedsRewrite = false
+
+    private val compressionLevel = 5
+
+    init {
+        //if file isn't empty try to load entries
+        if (file.length() > 0) {
+            val endRecord = findEndRecord()
+
+            if (endRecord.diskNumber > 0u || endRecord.totalEntries != endRecord.diskEntries)
+                throw IllegalArgumentException("Multi-file archives are not supported")
+
+            entries = readEntries(endRecord).toMutableList()
+        }
+
+        //seek back to start for writing
+        filePointer.seek(0)
+    }
+
+    private fun findEndRecord(): ZipEndRecord {
+        //look from end to start since end record is at the end
+        for (i in filePointer.length() - 1 downTo 0) {
+            filePointer.seek(i)
+            //possible beginning of signature
+            if (filePointer.readByte() == 0x50.toByte()) {
+                //seek back to get the full int
+                filePointer.seek(i)
+                val possibleSignature = filePointer.readUIntLE()
+                if (possibleSignature == ZipEndRecord.ECD_SIGNATURE) {
+                    filePointer.seek(i)
+                    return ZipEndRecord.fromECD(filePointer)
+                }
+            }
+        }
+
+        throw Exception("Couldn't find end record")
+    }
+
+    private fun readEntries(endRecord: ZipEndRecord): List<ZipEntry> {
+        filePointer.seek(endRecord.centralDirectoryStartOffset.toLong())
+
+        val numberOfEntries = endRecord.diskEntries.toInt()
+
+        return buildList(numberOfEntries) {
+            for (i in 1..numberOfEntries) {
+                add(
+                    ZipEntry.fromCDE(filePointer).also
+                    {
+                        //for some reason the local extra field can be different from the central one
+                        it.readLocalExtra(
+                            filePointer.channel.map(
+                                FileChannel.MapMode.READ_ONLY,
+                                it.localHeaderOffset.toLong() + 28,
+                                2
+                            )
+                        )
+                    })
+            }
+        }
+    }
+
+    private fun writeCD() {
+        val CDStart = filePointer.channel.position().toUInt()
+
+        entries.forEach {
+            filePointer.channel.write(it.toCDE())
+        }
+
+        val entriesCount = entries.size.toUShort()
+
+        val endRecord = ZipEndRecord(
+            0u,
+            0u,
+            entriesCount,
+            entriesCount,
+            filePointer.channel.position().toUInt() - CDStart,
+            CDStart,
+            ""
+        )
+
+        filePointer.channel.write(endRecord.toECD())
+    }
+
+    private fun addEntry(entry: ZipEntry, data: ByteBuffer) {
+        CDNeedsRewrite = true
+
+        entry.localHeaderOffset = filePointer.channel.position().toUInt()
+
+        filePointer.channel.write(entry.toLFH())
+        filePointer.channel.write(data)
+
+        entries.add(entry)
+    }
+
+    fun addEntryCompressData(entry: ZipEntry, data: ByteArray) {
+        val compressor = Deflater(compressionLevel, true)
+        compressor.setInput(data)
+        compressor.finish()
+
+        val uncompressedSize = data.size
+        val compressedData =
+            ByteArray(uncompressedSize) //i'm guessing compression won't make the data bigger
+
+        val compressedDataLength = compressor.deflate(compressedData)
+        val compressedBuffer =
+            ByteBuffer.wrap(compressedData.take(compressedDataLength).toByteArray())
+
+        compressor.end()
+
+        val crc = CRC32()
+        crc.update(data)
+
+        entry.compression = 8u //deflate compression
+        entry.uncompressedSize = uncompressedSize.toUInt()
+        entry.compressedSize = compressedDataLength.toUInt()
+        entry.crc32 = crc.value.toUInt()
+
+        addEntry(entry, compressedBuffer)
+    }
+
+    fun addEntryCopyData(entry: ZipEntry, data: ByteBuffer, alignment: Int? = null) {
+        alignment?.let { alignment ->
+            //calculate where data would end up
+            val dataOffset = filePointer.filePointer + entry.LFHSize
+
+            val mod = dataOffset % alignment
+
+            //wrong alignment
+            if (mod != 0L) {
+                //add padding at end of extra field
+                entry.localExtraField =
+                    entry.localExtraField.copyOf((entry.localExtraField.size + (alignment - mod)).toInt())
+            }
+        }
+
+        addEntry(entry, data)
+    }
+
+    fun getDataForEntry(entry: ZipEntry): ByteBuffer {
+        return filePointer.channel.map(
+            FileChannel.MapMode.READ_ONLY,
+            entry.dataOffset.toLong(),
+            entry.compressedSize.toLong()
+        )
+    }
+
+    fun copyEntriesFromFileAligned(file: ZipFile, entryAlignment: (entry: ZipEntry) -> Int?) {
+        for (entry in file.entries) {
+            if (entries.any { it.fileName == entry.fileName }) continue //don't add duplicates
+
+            val data = file.getDataForEntry(entry)
+            addEntryCopyData(entry, data, entryAlignment(entry))
+        }
+    }
+
+    override fun close() {
+        if (CDNeedsRewrite) writeCD()
+        filePointer.close()
+    }
+}

android/app/src/main/kotlin/app/revanced/manager/utils/zip/structures/ZipEndRecord.kt

@@ -0,0 +1,78 @@
+package app.revanced.manager.utils.zip.structures
+
+import app.revanced.manager.utils.zip.putUInt
+import app.revanced.manager.utils.zip.putUShort
+import app.revanced.manager.utils.zip.readUIntLE
+import app.revanced.manager.utils.zip.readUShortLE
+import java.io.DataInput
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+
+data class ZipEndRecord(
+    val diskNumber: UShort,
+    val startingDiskNumber: UShort,
+    val diskEntries: UShort,
+    val totalEntries: UShort,
+    val centralDirectorySize: UInt,
+    val centralDirectoryStartOffset: UInt,
+    val fileComment: String,
+) {
+
+    companion object {
+        const val ECD_HEADER_SIZE = 22
+        const val ECD_SIGNATURE = 0x06054b50u
+
+        fun fromECD(input: DataInput): ZipEndRecord {
+            val signature = input.readUIntLE()
+
+            if (signature != ECD_SIGNATURE)
+                throw IllegalArgumentException("Input doesn't start with end record signature")
+
+            val diskNumber = input.readUShortLE()
+            val startingDiskNumber = input.readUShortLE()
+            val diskEntries = input.readUShortLE()
+            val totalEntries = input.readUShortLE()
+            val centralDirectorySize = input.readUIntLE()
+            val centralDirectoryStartOffset = input.readUIntLE()
+            val fileCommentLength = input.readUShortLE()
+            var fileComment = ""
+
+            if (fileCommentLength > 0u) {
+                val fileCommentBytes = ByteArray(fileCommentLength.toInt())
+                input.readFully(fileCommentBytes)
+                fileComment = fileCommentBytes.toString(Charsets.UTF_8)
+            }
+
+            return ZipEndRecord(
+                diskNumber,
+                startingDiskNumber,
+                diskEntries,
+                totalEntries,
+                centralDirectorySize,
+                centralDirectoryStartOffset,
+                fileComment
+            )
+        }
+    }
+
+    fun toECD(): ByteBuffer {
+        val commentBytes = fileComment.toByteArray(Charsets.UTF_8)
+
+        val buffer = ByteBuffer.allocate(ECD_HEADER_SIZE + commentBytes.size)
+            .also { it.order(ByteOrder.LITTLE_ENDIAN) }
+
+        buffer.putUInt(ECD_SIGNATURE)
+        buffer.putUShort(diskNumber)
+        buffer.putUShort(startingDiskNumber)
+        buffer.putUShort(diskEntries)
+        buffer.putUShort(totalEntries)
+        buffer.putUInt(centralDirectorySize)
+        buffer.putUInt(centralDirectoryStartOffset)
+        buffer.putUShort(commentBytes.size.toUShort())
+
+        buffer.put(commentBytes)
+
+        buffer.flip()
+        return buffer
+    }
+}

android/app/src/main/kotlin/app/revanced/manager/utils/zip/structures/ZipEntry.kt

@@ -0,0 +1,190 @@
+package app.revanced.manager.utils.zip.structures
+
+import app.revanced.manager.utils.zip.*
+import java.io.DataInput
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+
+data class ZipEntry(
+    val version: UShort,
+    val versionNeeded: UShort,
+    val flags: UShort,
+    var compression: UShort,
+    val modificationTime: UShort,
+    val modificationDate: UShort,
+    var crc32: UInt,
+    var compressedSize: UInt,
+    var uncompressedSize: UInt,
+    val diskNumber: UShort,
+    val internalAttributes: UShort,
+    val externalAttributes: UInt,
+    var localHeaderOffset: UInt,
+    val fileName: String,
+    val extraField: ByteArray,
+    val fileComment: String,
+    var localExtraField: ByteArray = ByteArray(0), //separate for alignment
+) {
+    val LFHSize: Int
+        get() = LFH_HEADER_SIZE + fileName.toByteArray(Charsets.UTF_8).size + localExtraField.size
+
+    val dataOffset: UInt
+        get() = localHeaderOffset + LFHSize.toUInt()
+
+    companion object {
+        const val CDE_HEADER_SIZE = 46
+        const val CDE_SIGNATURE = 0x02014b50u
+
+        const val LFH_HEADER_SIZE = 30
+        const val LFH_SIGNATURE = 0x04034b50u
+
+        fun createWithName(fileName: String): ZipEntry {
+            return ZipEntry(
+                0x1403u, //made by unix, version 20
+                0u,
+                0u,
+                0u,
+                0x0821u, //seems to be static time google uses, no idea
+                0x0221u, //same as above
+                0u,
+                0u,
+                0u,
+                0u,
+                0u,
+                0u,
+                0u,
+                fileName,
+                ByteArray(0),
+                ""
+            )
+        }
+
+        fun fromCDE(input: DataInput): ZipEntry {
+            val signature = input.readUIntLE()
+
+            if (signature != CDE_SIGNATURE)
+                throw IllegalArgumentException("Input doesn't start with central directory entry signature")
+
+            val version = input.readUShortLE()
+            val versionNeeded = input.readUShortLE()
+            var flags = input.readUShortLE()
+            val compression = input.readUShortLE()
+            val modificationTime = input.readUShortLE()
+            val modificationDate = input.readUShortLE()
+            val crc32 = input.readUIntLE()
+            val compressedSize = input.readUIntLE()
+            val uncompressedSize = input.readUIntLE()
+            val fileNameLength = input.readUShortLE()
+            var fileName = ""
+            val extraFieldLength = input.readUShortLE()
+            var extraField = ByteArray(extraFieldLength.toInt())
+            val fileCommentLength = input.readUShortLE()
+            var fileComment = ""
+            val diskNumber = input.readUShortLE()
+            val internalAttributes = input.readUShortLE()
+            val externalAttributes = input.readUIntLE()
+            val localHeaderOffset = input.readUIntLE()
+
+            val variableFieldsLength =
+                fileNameLength.toInt() + extraFieldLength.toInt() + fileCommentLength.toInt()
+
+            if (variableFieldsLength > 0) {
+                val fileNameBytes = ByteArray(fileNameLength.toInt())
+                input.readFully(fileNameBytes)
+                fileName = fileNameBytes.toString(Charsets.UTF_8)
+
+                input.readFully(extraField)
+
+                val fileCommentBytes = ByteArray(fileCommentLength.toInt())
+                input.readFully(fileCommentBytes)
+                fileComment = fileCommentBytes.toString(Charsets.UTF_8)
+            }
+
+            flags = (flags and 0b1000u.inv()
+                .toUShort()) //disable data descriptor flag as they are not used
+
+            return ZipEntry(
+                version,
+                versionNeeded,
+                flags,
+                compression,
+                modificationTime,
+                modificationDate,
+                crc32,
+                compressedSize,
+                uncompressedSize,
+                diskNumber,
+                internalAttributes,
+                externalAttributes,
+                localHeaderOffset,
+                fileName,
+                extraField,
+                fileComment,
+            )
+        }
+    }
+
+    fun readLocalExtra(buffer: ByteBuffer) {
+        buffer.order(ByteOrder.LITTLE_ENDIAN)
+        localExtraField = ByteArray(buffer.getUShort().toInt())
+    }
+
+    fun toLFH(): ByteBuffer {
+        val nameBytes = fileName.toByteArray(Charsets.UTF_8)
+
+        val buffer = ByteBuffer.allocate(LFH_HEADER_SIZE + nameBytes.size + localExtraField.size)
+            .also { it.order(ByteOrder.LITTLE_ENDIAN) }
+
+        buffer.putUInt(LFH_SIGNATURE)
+        buffer.putUShort(versionNeeded)
+        buffer.putUShort(flags)
+        buffer.putUShort(compression)
+        buffer.putUShort(modificationTime)
+        buffer.putUShort(modificationDate)
+        buffer.putUInt(crc32)
+        buffer.putUInt(compressedSize)
+        buffer.putUInt(uncompressedSize)
+        buffer.putUShort(nameBytes.size.toUShort())
+        buffer.putUShort(localExtraField.size.toUShort())
+
+        buffer.put(nameBytes)
+        buffer.put(localExtraField)
+
+        buffer.flip()
+        return buffer
+    }
+
+    fun toCDE(): ByteBuffer {
+        val nameBytes = fileName.toByteArray(Charsets.UTF_8)
+        val commentBytes = fileComment.toByteArray(Charsets.UTF_8)
+
+        val buffer =
+            ByteBuffer.allocate(CDE_HEADER_SIZE + nameBytes.size + extraField.size + commentBytes.size)
+                .also { it.order(ByteOrder.LITTLE_ENDIAN) }
+
+        buffer.putUInt(CDE_SIGNATURE)
+        buffer.putUShort(version)
+        buffer.putUShort(versionNeeded)
+        buffer.putUShort(flags)
+        buffer.putUShort(compression)
+        buffer.putUShort(modificationTime)
+        buffer.putUShort(modificationDate)
+        buffer.putUInt(crc32)
+        buffer.putUInt(compressedSize)
+        buffer.putUInt(uncompressedSize)
+        buffer.putUShort(nameBytes.size.toUShort())
+        buffer.putUShort(extraField.size.toUShort())
+        buffer.putUShort(commentBytes.size.toUShort())
+        buffer.putUShort(diskNumber)
+        buffer.putUShort(internalAttributes)
+        buffer.putUInt(externalAttributes)
+        buffer.putUInt(localHeaderOffset)
+
+        buffer.put(nameBytes)
+        buffer.put(extraField)
+        buffer.put(commentBytes)
+
+        buffer.flip()
+        return buffer
+    }
+}
+

android/app/src/main/res/xml/file_paths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <cache-path name="cache" path="." />
+</paths>

assets/i18n/en.json

@@ -43,12 +43,19 @@
         "widgetThirdSubtitle": "{selected} patch(es) selected."
     },
     "appSelectorView": {
-        "searchBarHint": "Search applications"
+        "searchBarHint": "Search applications",
+        "fabButton": "Storage",
+        "errorMessage": "Unable to use selected application."
     },
     "patchesSelectorView": {
         "searchBarHint": "Search patches",
         "fabButton": "Done"
     },
+    "installerView": {
+        "widgetTitle": "Installer",
+        "installButton": "Install",
+        "shareButton": "Share"
+    },
     "settingsView": {
         "widgetTitle": "Settings",
         "languageLabel": "Language",

lib/app/app.dart

@@ -2,8 +2,8 @@ import 'package:revanced_manager/services/patcher_api.dart';
 import 'package:revanced_manager/ui/views/app_selector/app_selector_view.dart';
 import 'package:revanced_manager/ui/views/app_selector/app_selector_viewmodel.dart';
 import 'package:revanced_manager/ui/views/contributors/contributors_view.dart';
-import 'package:revanced_manager/ui/views/home/home_view.dart';
-import 'package:revanced_manager/ui/views/patcher/patcher_view.dart';
+import 'package:revanced_manager/ui/views/installer/installer_view.dart';
+import 'package:revanced_manager/ui/views/installer/installer_viewmodel.dart';
 import 'package:revanced_manager/ui/views/patcher/patcher_viewmodel.dart';
 import 'package:revanced_manager/ui/views/patches_selector/patches_selector_view.dart';
 import 'package:revanced_manager/ui/views/patches_selector/patches_selector_viewmodel.dart';
@@ -14,10 +14,9 @@ import 'package:stacked_themes/stacked_themes.dart';
 
 @StackedApp(
   routes: [
-    MaterialRoute(page: HomeView),
     MaterialRoute(page: AppSelectorView),
-    MaterialRoute(page: PatcherView),
     MaterialRoute(page: PatchesSelectorView),
+    MaterialRoute(page: InstallerView),
     MaterialRoute(page: SettingsView),
     MaterialRoute(page: ContributorsView)
   ],
@@ -27,6 +26,7 @@ import 'package:stacked_themes/stacked_themes.dart';
     LazySingleton(classType: PatcherViewModel),
     LazySingleton(classType: AppSelectorViewModel),
     LazySingleton(classType: PatchesSelectorViewModel),
+    LazySingleton(classType: InstallerViewModel),
     LazySingleton(
         classType: ThemeService, resolveUsing: ThemeService.getInstance),
   ],

lib/app/app.locator.dart

@@ -4,7 +4,7 @@
 // StackedLocatorGenerator
 // **************************************************************************
 
-// ignore_for_file: public_member_api_docs
+// ignore_for_file: public_member_api_docs, depend_on_referenced_packages, implementation_imports
 
 import 'package:stacked_core/stacked_core.dart';
 import 'package:stacked_services/src/navigation/navigation_service.dart';
@@ -12,6 +12,7 @@ import 'package:stacked_themes/src/theme_service.dart';
 
 import '../services/patcher_api.dart';
 import '../ui/views/app_selector/app_selector_viewmodel.dart';
+import '../ui/views/installer/installer_viewmodel.dart';
 import '../ui/views/patcher/patcher_viewmodel.dart';
 import '../ui/views/patches_selector/patches_selector_viewmodel.dart';
 
@@ -29,5 +30,6 @@ Future<void> setupLocator(
   locator.registerLazySingleton(() => PatcherViewModel());
   locator.registerLazySingleton(() => AppSelectorViewModel());
   locator.registerLazySingleton(() => PatchesSelectorViewModel());
+  locator.registerLazySingleton(() => InstallerViewModel());
   locator.registerLazySingleton(() => ThemeService.getInstance());
 }

lib/app/app.router.dart

@@ -4,36 +4,33 @@
 // StackedRouterGenerator
 // **************************************************************************
 
-// ignore_for_file: no_leading_underscores_for_library_prefixes
+// ignore_for_file: no_leading_underscores_for_library_prefixes, implementation_imports
 import 'package:flutter/material.dart';
+import 'package:flutter/src/foundation/key.dart' as _i7;
 import 'package:stacked/stacked.dart' as _i1;
 import 'package:stacked_services/stacked_services.dart' as _i8;
 
-import '../ui/views/app_selector/app_selector_view.dart' as _i3;
-import '../ui/views/contributors/contributors_view.dart' as _i7;
-import '../ui/views/home/home_view.dart' as _i2;
-import '../ui/views/patcher/patcher_view.dart' as _i4;
-import '../ui/views/patches_selector/patches_selector_view.dart' as _i5;
-import '../ui/views/settings/settings_view.dart' as _i6;
+import '../ui/views/app_selector/app_selector_view.dart' as _i2;
+import '../ui/views/contributors/contributors_view.dart' as _i6;
+import '../ui/views/installer/installer_view.dart' as _i4;
+import '../ui/views/patches_selector/patches_selector_view.dart' as _i3;
+import '../ui/views/settings/settings_view.dart' as _i5;
 
 class Routes {
-  static const homeView = '/home-view';
-
   static const appSelectorView = '/app-selector-view';
 
-  static const patcherView = '/patcher-view';
-
   static const patchesSelectorView = '/patches-selector-view';
 
+  static const installerView = '/installer-view';
+
   static const settingsView = '/settings-view';
 
   static const contributorsView = '/contributors-view';
 
   static const all = <String>{
-    homeView,
     appSelectorView,
-    patcherView,
     patchesSelectorView,
+    installerView,
     settingsView,
     contributorsView
   };
@@ -41,48 +38,44 @@ class Routes {
 
 class StackedRouter extends _i1.RouterBase {
   final _routes = <_i1.RouteDef>[
-    _i1.RouteDef(Routes.homeView, page: _i2.HomeView),
-    _i1.RouteDef(Routes.appSelectorView, page: _i3.AppSelectorView),
-    _i1.RouteDef(Routes.patcherView, page: _i4.PatcherView),
-    _i1.RouteDef(Routes.patchesSelectorView, page: _i5.PatchesSelectorView),
-    _i1.RouteDef(Routes.settingsView, page: _i6.SettingsView),
-    _i1.RouteDef(Routes.contributorsView, page: _i7.ContributorsView)
+    _i1.RouteDef(Routes.appSelectorView, page: _i2.AppSelectorView),
+    _i1.RouteDef(Routes.patchesSelectorView, page: _i3.PatchesSelectorView),
+    _i1.RouteDef(Routes.installerView, page: _i4.InstallerView),
+    _i1.RouteDef(Routes.settingsView, page: _i5.SettingsView),
+    _i1.RouteDef(Routes.contributorsView, page: _i6.ContributorsView)
   ];
 
   final _pagesMap = <Type, _i1.StackedRouteFactory>{
-    _i2.HomeView: (data) {
+    _i2.AppSelectorView: (data) {
       return MaterialPageRoute<dynamic>(
-        builder: (context) => const _i2.HomeView(),
+        builder: (context) => const _i2.AppSelectorView(),
         settings: data,
       );
     },
-    _i3.AppSelectorView: (data) {
+    _i3.PatchesSelectorView: (data) {
       return MaterialPageRoute<dynamic>(
-        builder: (context) => const _i3.AppSelectorView(),
+        builder: (context) => const _i3.PatchesSelectorView(),
         settings: data,
       );
     },
-    _i4.PatcherView: (data) {
+    _i4.InstallerView: (data) {
+      final args = data.getArgs<InstallerViewArguments>(
+        orElse: () => const InstallerViewArguments(),
+      );
       return MaterialPageRoute<dynamic>(
-        builder: (context) => const _i4.PatcherView(),
+        builder: (context) => _i4.InstallerView(key: args.key),
         settings: data,
       );
     },
-    _i5.PatchesSelectorView: (data) {
+    _i5.SettingsView: (data) {
       return MaterialPageRoute<dynamic>(
-        builder: (context) => const _i5.PatchesSelectorView(),
+        builder: (context) => const _i5.SettingsView(),
         settings: data,
       );
     },
-    _i6.SettingsView: (data) {
+    _i6.ContributorsView: (data) {
       return MaterialPageRoute<dynamic>(
-        builder: (context) => const _i6.SettingsView(),
-        settings: data,
-      );
-    },
-    _i7.ContributorsView: (data) {
-      return MaterialPageRoute<dynamic>(
-        builder: (context) => const _i7.ContributorsView(),
+        builder: (context) => const _i6.ContributorsView(),
         settings: data,
       );
     }
@@ -94,21 +87,13 @@ class StackedRouter extends _i1.RouterBase {
   Map<Type, _i1.StackedRouteFactory> get pagesMap => _pagesMap;
 }
 
-extension NavigatorStateExtension on _i8.NavigationService {
-  Future<dynamic> navigateToHomeView(
-      [int? routerId,
-      bool preventDuplicates = true,
-      Map<String, String>? parameters,
-      Widget Function(
-              BuildContext, Animation<double>, Animation<double>, Widget)?
-          transition]) async {
-    navigateTo(Routes.homeView,
-        id: routerId,
-        preventDuplicates: preventDuplicates,
-        parameters: parameters,
-        transition: transition);
-  }
+class InstallerViewArguments {
+  const InstallerViewArguments({this.key});
 
+  final _i7.Key? key;
+}
+
+extension NavigatorStateExtension on _i8.NavigationService {
   Future<dynamic> navigateToAppSelectorView(
       [int? routerId,
       bool preventDuplicates = true,
@@ -123,20 +108,6 @@ extension NavigatorStateExtension on _i8.NavigationService {
         transition: transition);
   }
 
-  Future<dynamic> navigateToPatcherView(
-      [int? routerId,
-      bool preventDuplicates = true,
-      Map<String, String>? parameters,
-      Widget Function(
-              BuildContext, Animation<double>, Animation<double>, Widget)?
-          transition]) async {
-    navigateTo(Routes.patcherView,
-        id: routerId,
-        preventDuplicates: preventDuplicates,
-        parameters: parameters,
-        transition: transition);
-  }
-
   Future<dynamic> navigateToPatchesSelectorView(
       [int? routerId,
       bool preventDuplicates = true,
@@ -151,6 +122,22 @@ extension NavigatorStateExtension on _i8.NavigationService {
         transition: transition);
   }
 
+  Future<dynamic> navigateToInstallerView(
+      {_i7.Key? key,
+      int? routerId,
+      bool preventDuplicates = true,
+      Map<String, String>? parameters,
+      Widget Function(
+              BuildContext, Animation<double>, Animation<double>, Widget)?
+          transition}) async {
+    navigateTo(Routes.installerView,
+        arguments: InstallerViewArguments(key: key),
+        id: routerId,
+        preventDuplicates: preventDuplicates,
+        parameters: parameters,
+        transition: transition);
+  }
+
   Future<dynamic> navigateToSettingsView(
       [int? routerId,
       bool preventDuplicates = true,

lib/main.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_i18n/flutter_i18n.dart';
-
 // ignore: depend_on_referenced_packages
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:revanced_manager/app/app.locator.dart';

lib/models/application_info.dart

@@ -0,0 +1,13 @@
+class ApplicationInfo {
+  final String name;
+  final String packageName;
+  final String version;
+  final String apkFilePath;
+
+  ApplicationInfo({
+    required this.name,
+    required this.packageName,
+    required this.version,
+    required this.apkFilePath,
+  });
+}

lib/services/patcher_api.dart

@@ -1,22 +1,45 @@
 import 'dart:io';
+import 'package:app_installer/app_installer.dart';
+import 'package:device_apps/device_apps.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_cache_manager/flutter_cache_manager.dart';
 import 'package:injectable/injectable.dart';
-import 'package:installed_apps/app_info.dart';
-import 'package:installed_apps/installed_apps.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:revanced_manager/app/app.locator.dart';
+import 'package:revanced_manager/models/application_info.dart';
 import 'package:revanced_manager/models/patch.dart';
 import 'package:revanced_manager/services/github_api.dart';
+import 'package:revanced_manager/ui/views/installer/installer_viewmodel.dart';
 import 'package:revanced_manager/utils/string.dart';
+import 'package:share_extend/share_extend.dart';
 
 @lazySingleton
 class PatcherAPI {
+  static const platform = MethodChannel('app.revanced.manager/patcher');
   final GithubAPI githubAPI = GithubAPI();
-  final List<AppInfo> _filteredPackages = [];
+  final List<ApplicationWithIcon> _filteredPackages = [];
   final Map<String, List<Patch>> _filteredPatches = <String, List<Patch>>{};
+  bool isRoot = false;
+  Directory? _workDir;
+  Directory? _cacheDir;
   File? _patchBundleFile;
-  static const platform = MethodChannel('app.revanced/patcher');
+  File? _integrations;
+  File? _inputFile;
+  File? _patchedFile;
+  File? _outFile;
 
-  Future<void> loadPatches() async {
+  Future<dynamic> handlePlatformChannelMethods() async {
+    platform.setMethodCallHandler((call) async {
+      switch (call.method) {
+        case 'updateInstallerLog':
+          var message = call.arguments<String>('message');
+          locator<InstallerViewModel>().addLog(message);
+          return 'OK';
+      }
+    });
+  }
+
+  Future<bool?> loadPatches() async {
     if (_patchBundleFile == null) {
       String? dexFileUrl =
           await githubAPI.latestRelease('revanced', 'revanced-patches');
@@ -24,7 +47,7 @@ class PatcherAPI {
         _patchBundleFile =
             await DefaultCacheManager().getSingleFile(dexFileUrl);
         try {
-          await platform.invokeMethod(
+          return await platform.invokeMethod<bool>(
             'loadPatches',
             {
               'pathBundlesPaths': <String>[_patchBundleFile!.absolute.path],
@@ -32,12 +55,15 @@ class PatcherAPI {
           );
         } on PlatformException {
           _patchBundleFile = null;
+          return false;
         }
       }
+      return false;
     }
+    return true;
   }
 
-  Future<List<AppInfo>> getFilteredInstalledApps() async {
+  Future<List<ApplicationWithIcon>> getFilteredInstalledApps() async {
     if (_patchBundleFile != null && _filteredPackages.isEmpty) {
       try {
         List<String>? patchesPackages =
@@ -45,8 +71,11 @@ class PatcherAPI {
         if (patchesPackages != null) {
           for (String package in patchesPackages) {
             try {
-              AppInfo app = await InstalledApps.getAppInfo(package);
-              _filteredPackages.add(app);
+              ApplicationWithIcon? app = await DeviceApps.getApp(package, true)
+                  as ApplicationWithIcon?;
+              if (app != null) {
+                _filteredPackages.add(app);
+              }
             } catch (e) {
               continue;
             }
@@ -60,25 +89,25 @@ class PatcherAPI {
     return _filteredPackages;
   }
 
-  Future<List<Patch>?> getFilteredPatches(AppInfo? targetApp) async {
-    if (_patchBundleFile != null && targetApp != null) {
-      if (_filteredPatches[targetApp.packageName] == null ||
-          _filteredPatches[targetApp.packageName]!.isEmpty) {
-        _filteredPatches[targetApp.packageName!] = [];
+  Future<List<Patch>?> getFilteredPatches(ApplicationInfo? selectedApp) async {
+    if (_patchBundleFile != null && selectedApp != null) {
+      if (_filteredPatches[selectedApp.packageName] == null ||
+          _filteredPatches[selectedApp.packageName]!.isEmpty) {
+        _filteredPatches[selectedApp.packageName] = [];
         try {
           var patches = await platform.invokeListMethod<Map<dynamic, dynamic>>(
             'getFilteredPatches',
             {
-              'targetPackage': targetApp.packageName,
-              'targetVersion': targetApp.versionName,
+              'targetPackage': selectedApp.packageName,
+              'targetVersion': selectedApp.version,
               'ignoreVersion': true,
             },
           );
           if (patches != null) {
             for (var patch in patches) {
-              if (!_filteredPatches[targetApp.packageName]!
+              if (!_filteredPatches[selectedApp.packageName]!
                   .any((element) => element.name == patch['name'])) {
-                _filteredPatches[targetApp.packageName]!.add(
+                _filteredPatches[selectedApp.packageName]!.add(
                   Patch(
                     name: patch['name'],
                     simpleName: (patch['name'] as String)
@@ -94,13 +123,168 @@ class PatcherAPI {
             }
           }
         } on PlatformException {
-          _filteredPatches[targetApp.packageName]!.clear();
+          _filteredPatches[selectedApp.packageName]!.clear();
           return List.empty();
         }
       }
     } else {
       return List.empty();
     }
-    return _filteredPatches[targetApp.packageName];
+    return _filteredPatches[selectedApp.packageName];
+  }
+
+  Future<File?> downloadIntegrations() async {
+    String? apkFileUrl =
+        await githubAPI.latestRelease('revanced', 'revanced-integrations');
+    if (apkFileUrl != null && apkFileUrl.isNotEmpty) {
+      return await DefaultCacheManager().getSingleFile(apkFileUrl);
+    }
+    return null;
+  }
+
+  Future<bool?> initPatcher() async {
+    try {
+      _integrations = await downloadIntegrations();
+      if (_integrations != null) {
+        Directory tmpDir = await getTemporaryDirectory();
+        _workDir = tmpDir.createTempSync('tmp-');
+        _inputFile = File('${_workDir!.path}/base.apk');
+        _patchedFile = File('${_workDir!.path}/patched.apk');
+        _outFile = File('${_workDir!.path}/out.apk');
+        _cacheDir = Directory('${_workDir!.path}/cache');
+        _cacheDir!.createSync();
+        return true;
+      }
+    } on Exception {
+      return false;
+    }
+    return false;
+  }
+
+  Future<bool?> copyInputFile(String originalFilePath) async {
+    if (_inputFile != null) {
+      try {
+        return await platform.invokeMethod<bool>(
+          'copyInputFile',
+          {
+            'originalFilePath': originalFilePath,
+            'inputFilePath': _inputFile!.path,
+          },
+        );
+      } on PlatformException {
+        return false;
+      }
+    }
+    return false;
+  }
+
+  Future<bool?> createPatcher() async {
+    if (_inputFile != null && _cacheDir != null) {
+      try {
+        return await platform.invokeMethod<bool>(
+          'createPatcher',
+          {
+            'inputFilePath': _inputFile!.path,
+            'cacheDirPath': _cacheDir!.path,
+          },
+        );
+      } on PlatformException {
+        return false;
+      }
+    }
+    return false;
+  }
+
+  Future<bool?> mergeIntegrations() async {
+    try {
+      return await platform.invokeMethod<bool>(
+        'mergeIntegrations',
+        {
+          'integrationsPath': _integrations!.path,
+        },
+      );
+    } on PlatformException {
+      return false;
+    }
+  }
+
+  Future<bool?> applyPatches(List<Patch> selectedPatches) async {
+    try {
+      return await platform.invokeMethod<bool>(
+        'applyPatches',
+        {
+          'selectedPatches': selectedPatches.map((e) => e.name).toList(),
+        },
+      );
+    } on PlatformException {
+      return false;
+    }
+  }
+
+  Future<bool?> repackPatchedFile() async {
+    if (_inputFile != null && _patchedFile != null) {
+      try {
+        return await platform.invokeMethod<bool>(
+          'repackPatchedFile',
+          {
+            'inputFilePath': _inputFile!.path,
+            'patchedFilePath': _patchedFile!.path,
+          },
+        );
+      } on PlatformException {
+        return false;
+      }
+    }
+    return false;
+  }
+
+  Future<bool?> signPatchedFile() async {
+    if (_patchedFile != null && _outFile != null) {
+      try {
+        return await platform.invokeMethod<bool>(
+          'signPatchedFile',
+          {
+            'patchedFilePath': _patchedFile!.path,
+            'outFilePath': _outFile!.path,
+          },
+        );
+      } on PlatformException {
+        return false;
+      }
+    }
+    return false;
+  }
+
+  Future<bool> installPatchedFile() async {
+    if (_outFile != null) {
+      try {
+        if (isRoot) {
+          // TBD
+        } else {
+          await AppInstaller.installApk(_outFile!.path);
+        }
+        return true;
+      } on Exception {
+        return false;
+      }
+    }
+    return false;
+  }
+
+  void cleanPatcher() {
+    if (_workDir != null) {
+      _workDir!.deleteSync(recursive: true);
+    }
+  }
+
+  bool sharePatchedFile(String packageName) {
+    if (_outFile != null) {
+      String sharePath = '${_outFile!.parent.path}/$packageName.revanced.apk';
+      File share = _outFile!.copySync(sharePath);
+      ShareExtend.share(share.path, "file");
+      return true;
+    } else {
+      return false;
+    }
   }
 }

lib/ui/views/app_selector/app_selector_view.dart

@@ -21,9 +21,19 @@ class _AppSelectorViewState extends State<AppSelectorView> {
   Widget build(BuildContext context) {
     return ViewModelBuilder<AppSelectorViewModel>.reactive(
       disposeViewModel: false,
-      onModelReady: (model) => model.initialise(),
+      onModelReady: (model) => model.initialize(),
       viewModelBuilder: () => locator<AppSelectorViewModel>(),
       builder: (context, model, child) => Scaffold(
+        floatingActionButton: FloatingActionButton.extended(
+          onPressed: () {
+            model.selectAppFromStorage(context);
+            Navigator.of(context).pop();
+          },
+          label: I18nText('appSelectorView.fabButton'),
+          icon: const Icon(Icons.sd_storage),
+          backgroundColor: Theme.of(context).colorScheme.secondary,
+          foregroundColor: Colors.white,
+        ),
         body: SafeArea(
           child: Padding(
             padding:
@@ -71,16 +81,16 @@ class _AppSelectorViewState extends State<AppSelectorView> {
       child: ListView.builder(
         itemCount: model.apps.length,
         itemBuilder: (context, index) {
-          model.apps.sort((a, b) => a.name!.compareTo(b.name!));
+          model.apps.sort((a, b) => a.appName.compareTo(b.appName));
           return InkWell(
             onTap: () {
               model.selectApp(model.apps[index]);
               Navigator.of(context).pop();
             },
             child: InstalledAppItem(
-              name: model.apps[index].name!,
-              pkgName: model.apps[index].packageName!,
-              icon: model.apps[index].icon!,
+              name: model.apps[index].appName,
+              pkgName: model.apps[index].packageName,
+              icon: model.apps[index].icon,
             ),
           );
         },
@@ -93,8 +103,8 @@ class _AppSelectorViewState extends State<AppSelectorView> {
       child: ListView.builder(
         itemCount: model.apps.length,
         itemBuilder: (context, index) {
-          model.apps.sort((a, b) => a.name!.compareTo(b.name!));
-          if (model.apps[index].name!.toLowerCase().contains(
+          model.apps.sort((a, b) => a.appName.compareTo(b.appName));
+          if (model.apps[index].appName.toLowerCase().contains(
                 query.toLowerCase(),
               )) {
             return InkWell(
@@ -103,9 +113,9 @@ class _AppSelectorViewState extends State<AppSelectorView> {
                 Navigator.of(context).pop();
               },
               child: InstalledAppItem(
-                name: model.apps[index].name!,
-                pkgName: model.apps[index].packageName!,
-                icon: model.apps[index].icon!,
+                name: model.apps[index].appName,
+                pkgName: model.apps[index].packageName,
+                icon: model.apps[index].icon,
               ),
             );
           } else {

lib/ui/views/app_selector/app_selector_viewmodel.dart

@@ -1,15 +1,22 @@
-import 'package:installed_apps/app_info.dart';
+import 'dart:io';
+import 'package:device_apps/device_apps.dart';
+import 'package:file_picker/file_picker.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter_i18n/flutter_i18n.dart';
+import 'package:fluttertoast/fluttertoast.dart';
+import 'package:package_archive_info/package_archive_info.dart';
 import 'package:revanced_manager/app/app.locator.dart';
+import 'package:revanced_manager/models/application_info.dart';
 import 'package:revanced_manager/services/patcher_api.dart';
 import 'package:revanced_manager/ui/views/patcher/patcher_viewmodel.dart';
 import 'package:stacked/stacked.dart';
 
 class AppSelectorViewModel extends BaseViewModel {
   final PatcherAPI patcherAPI = locator<PatcherAPI>();
-  List<AppInfo> apps = [];
-  AppInfo? selectedApp;
+  List<ApplicationWithIcon> apps = [];
+  ApplicationInfo? selectedApp;
 
-  Future<void> initialise() async {
+  Future<void> initialize() async {
     await getApps();
     notifyListeners();
   }
@@ -19,9 +26,47 @@ class AppSelectorViewModel extends BaseViewModel {
     apps = await patcherAPI.getFilteredInstalledApps();
   }
 
-  void selectApp(AppInfo appInfo) {
-    locator<AppSelectorViewModel>().selectedApp = appInfo;
+  void selectApp(ApplicationWithIcon application) {
+    ApplicationInfo app = ApplicationInfo(
+      name: application.appName,
+      packageName: application.packageName,
+      version: application.versionName!,
+      apkFilePath: application.apkFilePath,
+    );
+    locator<AppSelectorViewModel>().selectedApp = app;
     locator<PatcherViewModel>().dimPatchCard = false;
     locator<PatcherViewModel>().notifyListeners();
   }
+
+  Future<void> selectAppFromStorage(BuildContext context) async {
+    try {
+      FilePickerResult? result = await FilePicker.platform.pickFiles(
+        type: FileType.custom,
+        allowedExtensions: ['apk'],
+      );
+      if (result != null && result.files.single.path != null) {
+        File apkFile = File(result.files.single.path!);
+        PackageArchiveInfo? packageArchiveInfo =
+            await PackageArchiveInfo.fromPath(apkFile.path);
+        ApplicationInfo app = ApplicationInfo(
+          name: packageArchiveInfo.appName,
+          packageName: packageArchiveInfo.packageName,
+          version: packageArchiveInfo.version,
+          apkFilePath: result.files.single.path!,
+        );
+        locator<AppSelectorViewModel>().selectedApp = app;
+        locator<PatcherViewModel>().dimPatchCard = false;
+        locator<PatcherViewModel>().notifyListeners();
+      }
+    } on Exception {
+      Fluttertoast.showToast(
+        msg: FlutterI18n.translate(
+          context,
+          'appSelectorView.errorMessage',
+        ),
+        toastLength: Toast.LENGTH_LONG,
+        gravity: ToastGravity.CENTER,
+      );
+    }
+  }
 }

lib/ui/views/home/home_view.dart

@@ -26,7 +26,7 @@ class HomeView extends StatelessWidget {
                   Align(
                     alignment: Alignment.topRight,
                     child: IconButton(
-                      onPressed: () {},
+                      onPressed: () => {},
                       icon: const Icon(
                         Icons.more_vert,
                       ),

lib/ui/views/installer/installer_view.dart

@@ -0,0 +1,144 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_foreground_task/flutter_foreground_task.dart';
+import 'package:flutter_i18n/flutter_i18n.dart';
+import 'package:revanced_manager/app/app.locator.dart';
+import 'package:revanced_manager/ui/views/installer/installer_viewmodel.dart';
+import 'package:stacked/stacked.dart';
+
+class InstallerView extends StatelessWidget {
+  InstallerView({Key? key}) : super(key: key);
+  final ScrollController _controller = ScrollController();
+
+  @override
+  Widget build(BuildContext context) {
+    WidgetsBinding.instance.addPostFrameCallback(
+      (_) => _controller.jumpTo(_controller.position.maxScrollExtent),
+    );
+    return ViewModelBuilder<InstallerViewModel>.reactive(
+      disposeViewModel: false,
+      onModelReady: (model) => model.initialize(),
+      viewModelBuilder: () => locator<InstallerViewModel>(),
+      builder: (context, model, child) => WillStartForegroundTask(
+        onWillStart: () async => model.isPatching,
+        androidNotificationOptions: AndroidNotificationOptions(
+          channelId: 'revanced-patcher-patching',
+          channelName: 'Patching',
+          channelDescription: 'This notification appears when the patching '
+              'foreground service is running.',
+          channelImportance: NotificationChannelImportance.LOW,
+          priority: NotificationPriority.LOW,
+        ),
+        notificationTitle: 'Patching',
+        notificationText: 'ReVanced Manager is patching',
+        callback: () => {},
+        child: WillPopScope(
+          child: Scaffold(
+            body: SafeArea(
+              child: LayoutBuilder(
+                builder: (context, constraints) => SingleChildScrollView(
+                  padding: const EdgeInsets.symmetric(horizontal: 12),
+                  controller: _controller,
+                  child: ConstrainedBox(
+                    constraints: BoxConstraints(
+                      minWidth: constraints.maxWidth,
+                      minHeight: constraints.maxHeight,
+                    ),
+                    child: IntrinsicHeight(
+                      child: Column(
+                        crossAxisAlignment: CrossAxisAlignment.start,
+                        children: <Widget>[
+                          I18nText(
+                            'installerView.widgetTitle',
+                            child: Text(
+                              '',
+                              style: Theme.of(context).textTheme.headline5,
+                            ),
+                          ),
+                          Padding(
+                            padding: const EdgeInsets.symmetric(
+                              vertical: 16.0,
+                              horizontal: 4.0,
+                            ),
+                            child: LinearProgressIndicator(
+                              color: Theme.of(context).colorScheme.secondary,
+                              backgroundColor: Colors.white,
+                              value: model.progress,
+                            ),
+                          ),
+                          Container(
+                            padding: const EdgeInsets.all(12.0),
+                            width: double.infinity,
+                            decoration: BoxDecoration(
+                              color: Theme.of(context).colorScheme.primary,
+                              borderRadius: BorderRadius.circular(8),
+                            ),
+                            child: SelectableText(
+                              model.logs,
+                              style: const TextStyle(
+                                  fontFamily: 'monospace', fontSize: 15),
+                            ),
+                          ),
+                          const Spacer(),
+                          Visibility(
+                            visible: model.showButtons,
+                            child: Row(
+                              children: [
+                                Expanded(
+                                  child: MaterialButton(
+                                    textColor: Colors.white,
+                                    color:
+                                        Theme.of(context).colorScheme.secondary,
+                                    padding: const EdgeInsets.symmetric(
+                                      vertical: 12,
+                                      horizontal: 8,
+                                    ),
+                                    shape: RoundedRectangleBorder(
+                                      borderRadius: BorderRadius.circular(12),
+                                    ),
+                                    onPressed: () => model.installResult(),
+                                    child: I18nText(
+                                      'installerView.installButton',
+                                    ),
+                                  ),
+                                ),
+                                const SizedBox(width: 12),
+                                Expanded(
+                                  child: MaterialButton(
+                                    textColor: Colors.white,
+                                    color:
+                                        Theme.of(context).colorScheme.secondary,
+                                    padding: const EdgeInsets.symmetric(
+                                      vertical: 12,
+                                      horizontal: 8,
+                                    ),
+                                    shape: RoundedRectangleBorder(
+                                      borderRadius: BorderRadius.circular(12),
+                                    ),
+                                    onPressed: () => model.shareResult(),
+                                    child: I18nText(
+                                      'installerView.shareButton',
+                                    ),
+                                  ),
+                                ),
+                              ],
+                            ),
+                          ),
+                        ],
+                      ),
+                    ),
+                  ),
+                ),
+              ),
+            ),
+          ),
+          onWillPop: () async {
+            if (!model.isPatching) {
+              Navigator.of(context).pop();
+            }
+            return false;
+          },
+        ),
+      ),
+    );
+  }
+}

lib/ui/views/installer/installer_viewmodel.dart

@@ -0,0 +1,114 @@
+import 'package:revanced_manager/app/app.locator.dart';
+import 'package:revanced_manager/models/application_info.dart';
+import 'package:revanced_manager/models/patch.dart';
+import 'package:revanced_manager/services/patcher_api.dart';
+import 'package:revanced_manager/ui/views/app_selector/app_selector_viewmodel.dart';
+import 'package:revanced_manager/ui/views/patches_selector/patches_selector_viewmodel.dart';
+import 'package:stacked/stacked.dart';
+
+class InstallerViewModel extends BaseViewModel {
+  double? progress = 0.2;
+  String logs = '';
+  bool isPatching = false;
+  bool showButtons = false;
+
+  Future<void> initialize() async {
+    await locator<PatcherAPI>().handlePlatformChannelMethods();
+    runPatcher();
+  }
+
+  void addLog(String message) {
+    if (logs.isNotEmpty) {
+      logs += '\n';
+    }
+    logs += message;
+    notifyListeners();
+  }
+
+  void updateProgress(double value) {
+    progress = value;
+    isPatching = progress == 1.0 ? false : true;
+    showButtons = progress == 1.0 ? true : false;
+    if (progress == 0.0) {
+      logs = '';
+    }
+    notifyListeners();
+  }
+
+  Future<void> runPatcher() async {
+    updateProgress(0.0);
+    ApplicationInfo? selectedApp = locator<AppSelectorViewModel>().selectedApp;
+    if (selectedApp != null) {
+      String apkFilePath = selectedApp.apkFilePath;
+      List<Patch> selectedPatches =
+          locator<PatchesSelectorViewModel>().selectedPatches;
+      if (selectedPatches.isNotEmpty) {
+        addLog('Initializing patcher...');
+        bool? isSuccess = await locator<PatcherAPI>().initPatcher();
+        if (isSuccess != null && isSuccess) {
+          addLog('Done');
+          updateProgress(0.1);
+          addLog('Copying original apk...');
+          isSuccess = await locator<PatcherAPI>().copyInputFile(apkFilePath);
+          if (isSuccess != null && isSuccess) {
+            addLog('Done');
+            updateProgress(0.2);
+            addLog('Creating patcher...');
+            isSuccess = await locator<PatcherAPI>().createPatcher();
+            if (isSuccess != null && isSuccess) {
+              if (selectedApp.packageName == 'com.google.android.youtube') {
+                addLog('Done');
+                updateProgress(0.3);
+                addLog('Merging integrations...');
+                isSuccess = await locator<PatcherAPI>().mergeIntegrations();
+              }
+              if (isSuccess != null && isSuccess) {
+                addLog('Done');
+                updateProgress(0.5);
+                addLog('Applying patches...');
+                isSuccess =
+                    await locator<PatcherAPI>().applyPatches(selectedPatches);
+                if (isSuccess != null && isSuccess) {
+                  addLog('Done');
+                  updateProgress(0.7);
+                  addLog('Repacking patched apk...');
+                  isSuccess = await locator<PatcherAPI>().repackPatchedFile();
+                  if (isSuccess != null && isSuccess) {
+                    addLog('Done');
+                    updateProgress(0.9);
+                    addLog('Signing patched apk...');
+                    isSuccess = await locator<PatcherAPI>().signPatchedFile();
+                    if (isSuccess != null && isSuccess) {
+                      addLog('Done');
+                      showButtons = true;
+                      updateProgress(1.0);
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+        if (isSuccess == null || !isSuccess) {
+          addLog('An error occurred! Aborting...');
+        }
+      } else {
+        addLog('No patches selected! Aborting...');
+      }
+    } else {
+      addLog('No app selected! Aborting...');
+    }
+    isPatching = false;
+  }
+
+  void installResult() async {
+    await locator<PatcherAPI>().installPatchedFile();
+  }
+
+  void shareResult() {
+    ApplicationInfo? selectedApp = locator<AppSelectorViewModel>().selectedApp;
+    if (selectedApp != null) {
+      locator<PatcherAPI>().sharePatchedFile(selectedApp.packageName);
+    }
+  }
+}

lib/ui/views/patcher/patcher_view.dart

@@ -3,12 +3,11 @@ import 'package:flutter_i18n/flutter_i18n.dart';
 import 'package:google_fonts/google_fonts.dart';
 import 'package:revanced_manager/app/app.locator.dart';
 import 'package:revanced_manager/theme.dart';
+import 'package:revanced_manager/ui/views/patcher/patcher_viewmodel.dart';
 import 'package:revanced_manager/ui/widgets/app_selector_card.dart';
 import 'package:revanced_manager/ui/widgets/patch_selector_card.dart';
 import 'package:stacked/stacked.dart';
 
-import 'patcher_viewmodel.dart';
-
 class PatcherView extends StatelessWidget {
   const PatcherView({Key? key}) : super(key: key);
 
@@ -21,7 +20,7 @@ class PatcherView extends StatelessWidget {
         floatingActionButton: Visibility(
           visible: locator<PatcherViewModel>().showFabButton,
           child: FloatingActionButton.extended(
-            onPressed: () => {},
+            onPressed: () => model.navigateToInstaller(),
             label: I18nText('patcherView.fabButton'),
             icon: const Icon(Icons.build),
             backgroundColor: Theme.of(context).colorScheme.secondary,

lib/ui/views/patcher/patcher_viewmodel.dart

@@ -15,4 +15,8 @@ class PatcherViewModel extends BaseViewModel {
   void navigateToPatchesSelector() {
     _navigationService.navigateTo(Routes.patchesSelectorView);
   }
+
+  void navigateToInstaller() {
+    _navigationService.navigateTo(Routes.installerView);
+  }
 }

lib/ui/views/patches_selector/patches_selector_view.dart

@@ -22,7 +22,7 @@ class _PatchesSelectorViewState extends State<PatchesSelectorView> {
   Widget build(BuildContext context) {
     return ViewModelBuilder<PatchesSelectorViewModel>.reactive(
       disposeViewModel: false,
-      onModelReady: (model) => model.initialise(),
+      onModelReady: (model) => model.initialize(),
       viewModelBuilder: () => locator<PatchesSelectorViewModel>(),
       builder: (context, model, child) => Scaffold(
         body: SafeArea(
@@ -52,7 +52,7 @@ class _PatchesSelectorViewState extends State<PatchesSelectorView> {
                           : _getFilteredResults(model),
                       MaterialButton(
                         textColor: Colors.white,
-                        color: const Color(0x957792BA),
+                        color: Theme.of(context).colorScheme.secondary,
                         minWidth: double.infinity,
                         padding: const EdgeInsets.symmetric(
                           vertical: 12,

lib/ui/views/patches_selector/patches_selector_viewmodel.dart

@@ -1,5 +1,5 @@
-import 'package:installed_apps/app_info.dart';
 import 'package:revanced_manager/app/app.locator.dart';
+import 'package:revanced_manager/models/application_info.dart';
 import 'package:revanced_manager/models/patch.dart';
 import 'package:revanced_manager/services/patcher_api.dart';
 import 'package:revanced_manager/ui/views/app_selector/app_selector_viewmodel.dart';
@@ -12,14 +12,14 @@ class PatchesSelectorViewModel extends BaseViewModel {
   List<Patch>? patches = [];
   List<Patch> selectedPatches = [];
 
-  Future<void> initialise() async {
+  Future<void> initialize() async {
     await getPatches();
     notifyListeners();
   }
 
   Future<void> getPatches() async {
-    AppInfo? appInfo = locator<AppSelectorViewModel>().selectedApp;
-    patches = await patcherAPI.getFilteredPatches(appInfo);
+    ApplicationInfo? app = locator<AppSelectorViewModel>().selectedApp;
+    patches = await patcherAPI.getFilteredPatches(app);
   }
 
   void selectPatches(List<PatchItem> patchItems) {

lib/ui/widgets/app_selector_card.dart

@@ -45,7 +45,7 @@ class AppSelectorCard extends StatelessWidget {
             const SizedBox(height: 10),
             locator<AppSelectorViewModel>().selectedApp != null
                 ? Text(
-                    locator<AppSelectorViewModel>().selectedApp!.packageName!,
+                    locator<AppSelectorViewModel>().selectedApp!.packageName,
                     style: robotoTextStyle,
                   )
                 : I18nText(

lib/ui/widgets/installed_app_item.dart

@@ -1,5 +1,4 @@
 import 'dart:typed_data';
-
 import 'package:flutter/material.dart';
 import 'package:google_fonts/google_fonts.dart';
 import 'package:revanced_manager/constants.dart';

lib/ui/widgets/latest_commit_card.dart

@@ -33,59 +33,52 @@ class _LatestCommitCardState extends State<LatestCommitCard> {
           Column(
             crossAxisAlignment: CrossAxisAlignment.start,
             children: [
-              Row(
-                children: [
-                  I18nText(
-                    'latestCommitCard.patcherLabel',
-                    child: Text(
-                      '',
-                      style: GoogleFonts.roboto(
-                        fontWeight: FontWeight.w700,
-                      ),
-                    ),
+              I18nText(
+                'latestCommitCard.patcherLabel',
+                child: Text(
+                  '',
+                  style: GoogleFonts.roboto(
+                    fontWeight: FontWeight.w700,
                   ),
-                  FutureBuilder<String>(
-                    future: githubAPI.latestCommitTime(
-                      'revanced',
-                      'revanced-patcher',
-                    ),
-                    initialData: FlutterI18n.translate(
-                      context,
-                      'latestCommitCard.loadingLabel',
-                    ),
-                    builder: (context, snapshot) => Text(
-                      snapshot.data!,
-                      style: robotoTextStyle,
-                    ),
-                  ),
-                ],
+                ),
               ),
-              Row(
-                children: [
-                  I18nText(
-                    'latestCommitCard.managerLabel',
-                    child: Text(
-                      '',
-                      style: GoogleFonts.roboto(
-                        fontWeight: FontWeight.w700,
-                      ),
-                    ),
+              FutureBuilder<String>(
+                future: githubAPI.latestCommitTime(
+                  'revanced',
+                  'revanced-patcher',
+                ),
+                initialData: FlutterI18n.translate(
+                  context,
+                  'latestCommitCard.loadingLabel',
+                ),
+                builder: (context, snapshot) => Text(
+                  snapshot.data!,
+                  style: robotoTextStyle,
+                ),
+              ),
+              const SizedBox(height: 8),
+              I18nText(
+                'latestCommitCard.managerLabel',
+                child: Text(
+                  '',
+                  style: GoogleFonts.roboto(
+                    fontWeight: FontWeight.w700,
                   ),
-                  FutureBuilder<String>(
-                    future: githubAPI.latestCommitTime(
-                      'revanced',
-                      'revanced-patcher',
-                    ),
-                    initialData: FlutterI18n.translate(
-                      context,
-                      'latestCommitCard.loadingLabel',
-                    ),
-                    builder: (context, snapshot) => Text(
-                      snapshot.data!,
-                      style: robotoTextStyle,
-                    ),
-                  ),
-                ],
+                ),
+              ),
+              FutureBuilder<String>(
+                future: githubAPI.latestCommitTime(
+                  'revanced',
+                  'revanced-patcher',
+                ),
+                initialData: FlutterI18n.translate(
+                  context,
+                  'latestCommitCard.loadingLabel',
+                ),
+                builder: (context, snapshot) => Text(
+                  snapshot.data!,
+                  style: robotoTextStyle,
+                ),
               ),
             ],
           ),

lib/ui/widgets/patch_item.dart

@@ -25,64 +25,69 @@ class PatchItem extends StatefulWidget {
 class _PatchItemState extends State<PatchItem> {
   @override
   Widget build(BuildContext context) {
-    return Container(
-      decoration: BoxDecoration(
-        color: Theme.of(context).colorScheme.primary,
-        borderRadius: BorderRadius.circular(12),
-      ),
-      padding: const EdgeInsets.symmetric(vertical: 12, horizontal: 12),
-      margin: const EdgeInsets.symmetric(vertical: 4, horizontal: 8),
-      child: Column(
-        children: [
-          Row(
-            mainAxisAlignment: MainAxisAlignment.spaceBetween,
-            children: [
-              Flexible(
-                child: Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    Row(
-                      crossAxisAlignment: CrossAxisAlignment.end,
-                      children: [
-                        Text(
-                          widget.simpleName,
-                          style: GoogleFonts.inter(
-                            fontSize: 16,
-                            fontWeight: FontWeight.w600,
+    return InkWell(
+      onTap: () => setState(() {
+        widget.isSelected = !widget.isSelected;
+      }),
+      child: Container(
+        decoration: BoxDecoration(
+          color: Theme.of(context).colorScheme.primary,
+          borderRadius: BorderRadius.circular(12),
+        ),
+        padding: const EdgeInsets.symmetric(vertical: 12, horizontal: 12),
+        margin: const EdgeInsets.symmetric(vertical: 4, horizontal: 8),
+        child: Column(
+          children: [
+            Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Flexible(
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Row(
+                        crossAxisAlignment: CrossAxisAlignment.end,
+                        children: [
+                          Text(
+                            widget.simpleName,
+                            style: GoogleFonts.inter(
+                              fontSize: 16,
+                              fontWeight: FontWeight.w600,
+                            ),
                           ),
-                        ),
-                        const SizedBox(width: 4),
-                        Text(widget.version)
-                      ],
-                    ),
-                    const SizedBox(height: 4),
-                    Text(
-                      widget.description,
-                      softWrap: true,
-                      maxLines: 3,
-                      overflow: TextOverflow.visible,
-                      style: GoogleFonts.roboto(
-                        fontSize: 14,
+                          const SizedBox(width: 4),
+                          Text(widget.version)
+                        ],
                       ),
-                    ),
-                  ],
+                      const SizedBox(height: 4),
+                      Text(
+                        widget.description,
+                        softWrap: true,
+                        maxLines: 3,
+                        overflow: TextOverflow.visible,
+                        style: GoogleFonts.roboto(
+                          fontSize: 14,
+                        ),
+                      ),
+                    ],
+                  ),
                 ),
-              ),
-              Transform.scale(
-                scale: 1.2,
-                child: Checkbox(
-                  value: widget.isSelected,
-                  activeColor: Colors.blueGrey[500],
-                  onChanged: (newValue) {
-                    setState(() {
-                      widget.isSelected = newValue!;
-                    });
-                  },
-                ),
-              )
-            ],
-          )
-        ],
+                Transform.scale(
+                  scale: 1.2,
+                  child: Checkbox(
+                    value: widget.isSelected,
+                    activeColor: Colors.blueGrey[500],
+                    onChanged: (newValue) {
+                      setState(() {
+                        widget.isSelected = newValue!;
+                      });
+                    },
+                  ),
+                )
+              ],
+            )
+          ],
+        ),
       ),
     );
   }

pubspec.lock

@@ -15,6 +15,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.3.1"
+  app_installer:
+    dependency: "direct main"
+    description:
+      name: app_installer
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
   args:
     dependency: transitive
     description:
@@ -162,6 +169,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.2.3"
+  device_apps:
+    dependency: "direct main"
+    description:
+      name: device_apps
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.0"
   dio:
     dependency: "direct main"
     description:
@@ -190,6 +204,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.2"
+  file_picker:
+    dependency: "direct main"
+    description:
+      name: file_picker
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.0.1"
   fixnum:
     dependency: transitive
     description:
@@ -209,6 +230,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.3.0"
+  flutter_foreground_task:
+    dependency: "direct main"
+    description:
+      name: flutter_foreground_task
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.8.1"
   flutter_i18n:
     dependency: "direct main"
     description:
@@ -228,6 +256,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.7"
   flutter_statusbarcolor_ns:
     dependency: transitive
     description:
@@ -252,6 +287,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  fluttertoast:
+    dependency: "direct main"
+    description:
+      name: fluttertoast
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "8.0.9"
   frontend_server_client:
     dependency: transitive
     description:
@@ -336,13 +378,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.5.4"
-  installed_apps:
-    dependency: "direct main"
-    description:
-      name: installed_apps
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.1"
   intl:
     dependency: transitive
     description:
@@ -434,6 +469,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.0"
+  package_archive_info:
+    dependency: "direct main"
+    description:
+      name: package_archive_info
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.0"
   package_config:
     dependency: transitive
     description:
@@ -441,6 +483,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  package_info:
+    dependency: transitive
+    description:
+      name: package_info
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
   path:
     dependency: transitive
     description:
@@ -581,6 +630,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.0.0"
+  root:
+    dependency: "direct main"
+    description:
+      name: root
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
   rxdart:
     dependency: transitive
     description:
@@ -588,6 +644,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.27.5"
+  share_extend:
+    dependency: "direct main"
+    description:
+      name: share_extend
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
   shared_preferences:
     dependency: transitive
     description:

pubspec.yaml

@@ -10,21 +10,28 @@ environment:
   sdk: ">=2.17.5 <3.0.0"
 
 dependencies:
+  app_installer: ^1.1.0
   cupertino_icons: ^1.0.2
+  device_apps: ^2.2.0
   dio: ^4.0.6
+  file_picker: ^5.0.1
   flutter:
     sdk: flutter
   flutter_cache_manager: ^3.3.0
+  flutter_foreground_task: ^3.8.1
   flutter_i18n: ^0.32.4
   flutter_svg: ^1.1.1+1
+  fluttertoast: ^8.0.9
   get_it: ^7.2.0
   github: ^9.4.0
   google_fonts: ^3.0.1
   http: ^0.13.4
   injectable: ^1.5.3
-  installed_apps: ^1.3.1
   json_annotation: ^4.6.0
+  package_archive_info: ^0.1.0
   path_provider: ^2.0.11
+  root: ^2.0.2
+  share_extend: ^2.0.0
   stacked: ^2.3.15
   stacked_generator: ^0.7.14
   stacked_services: ^0.9.3