diff --git a/app/build.gradle b/app/build.gradle
index fbdb42cf9..68be34143 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -35,6 +35,16 @@ android {
     dataBinding {
         enabled = true
     }
+
+    packagingOptions {
+        exclude '/META-INF/*.version'
+        exclude '/META-INF/*.kotlin_module'
+        exclude '/META-INF/rxkotlin.properties'
+        exclude '/androidsupportmultidexversion.txt'
+        exclude '/org/**'
+        exclude '/kotlin/**'
+        exclude '/kotlinx/**'
+    }
 }
 
 dependencies {
@@ -44,8 +54,6 @@ dependencies {
     implementation project(':signing')
 
     implementation 'com.github.topjohnwu:jtar:1.0.0'
-    implementation 'net.sourceforge.streamsupport:android-retrostreams:1.7.0'
-    implementation 'com.github.sevar83:indeterminate-checkbox:1.0.5'
     implementation 'com.jakewharton.timber:timber:4.7.1'
     implementation 'com.github.skoumalcz:teanity:0.3.3'
     implementation 'com.ncapdevi:frag-nav:3.2.0'
diff --git a/app/src/main/java/com/topjohnwu/magisk/App.kt b/app/src/main/java/com/topjohnwu/magisk/App.kt
index 4fcec157c..e34bfaacc 100644
--- a/app/src/main/java/com/topjohnwu/magisk/App.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/App.kt
@@ -41,7 +41,8 @@ open class App : Application(), Application.ActivityLifecycleCallbacks {
 
     override fun attachBaseContext(base: Context) {
         super.attachBaseContext(base)
-        MultiDex.install(base)
+        if (BuildConfig.DEBUG)
+            MultiDex.install(base)
         Timber.plant(Timber.DebugTree())
 
         startKoin {
diff --git a/app/src/main/java/com/topjohnwu/magisk/tasks/FlashZip.java b/app/src/main/java/com/topjohnwu/magisk/tasks/FlashZip.java
deleted file mode 100644
index 50803ec27..000000000
--- a/app/src/main/java/com/topjohnwu/magisk/tasks/FlashZip.java
+++ /dev/null
@@ -1,85 +0,0 @@
-package com.topjohnwu.magisk.tasks;
-
-import android.net.Uri;
-
-import com.topjohnwu.magisk.App;
-import com.topjohnwu.magisk.Const;
-import com.topjohnwu.magisk.utils.Utils;
-import com.topjohnwu.magisk.utils.ZipUtils;
-import com.topjohnwu.superuser.Shell;
-import com.topjohnwu.superuser.ShellUtils;
-import com.topjohnwu.superuser.internal.UiThreadHandler;
-
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.List;
-
-public abstract class FlashZip {
-
-    private Uri mUri;
-    private File tmpFile;
-    private List<String> console, logs;
-
-    public FlashZip(Uri uri, List<String> out, List<String> err) {
-        mUri = uri;
-        console = out;
-        logs = err;
-        tmpFile = new File(App.self.getCacheDir(), "install.zip");
-    }
-
-    private boolean unzipAndCheck() throws IOException {
-        ZipUtils.unzip(tmpFile, tmpFile.getParentFile(), "META-INF/com/google/android", true);
-        return Shell.su("grep -q '#MAGISK' " + new File(tmpFile.getParentFile(), "updater-script"))
-                .exec().isSuccess();
-    }
-
-    private boolean flash() throws IOException {
-        console.add("- Copying zip to temp directory");
-        try (InputStream in = App.self.getContentResolver().openInputStream(mUri);
-             OutputStream out = new BufferedOutputStream(new FileOutputStream(tmpFile))) {
-            if (in == null) throw new FileNotFoundException();
-            InputStream buf= new BufferedInputStream(in);
-            ShellUtils.pump(buf, out);
-        } catch (FileNotFoundException e) {
-            console.add("! Invalid Uri");
-            throw e;
-        } catch (IOException e) {
-            console.add("! Cannot copy to cache");
-            throw e;
-        }
-        try {
-            if (!unzipAndCheck()) {
-                console.add("! This zip is not a Magisk Module!");
-                return false;
-            }
-        } catch (IOException e) {
-            console.add("! Unzip error");
-            throw e;
-        }
-        console.add("- Installing " + Utils.getNameFromUri(App.self, mUri));
-        return Shell.su("cd " + tmpFile.getParent(),
-                "BOOTMODE=true sh update-binary dummy 1 " + tmpFile)
-                .to(console, logs)
-                .exec().isSuccess();
-    }
-
-    public void exec() {
-        App.THREAD_POOL.execute(() -> {
-            boolean success = false;
-            try {
-                success = flash();
-            } catch (IOException ignored) {}
-            Shell.su("cd /", "rm -rf " + tmpFile.getParent() + " " + Const.TMP_FOLDER_PATH).submit();
-            boolean finalSuccess = success;
-            UiThreadHandler.run(() -> onResult(finalSuccess));
-        });
-    }
-
-    protected abstract void onResult(boolean success);
-}
diff --git a/app/src/main/java/com/topjohnwu/magisk/tasks/FlashZip.kt b/app/src/main/java/com/topjohnwu/magisk/tasks/FlashZip.kt
new file mode 100644
index 000000000..0594dc2bb
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/tasks/FlashZip.kt
@@ -0,0 +1,73 @@
+package com.topjohnwu.magisk.tasks
+
+import android.net.Uri
+
+import com.topjohnwu.magisk.App
+import com.topjohnwu.magisk.Const
+import com.topjohnwu.magisk.utils.*
+import com.topjohnwu.superuser.Shell
+import com.topjohnwu.superuser.internal.UiThreadHandler
+
+import java.io.File
+import java.io.FileNotFoundException
+import java.io.IOException
+
+abstract class FlashZip(private val mUri: Uri,
+                        private val console: MutableList<String>,
+                        private val logs: MutableList<String>) {
+
+    private val tmpFile: File = File(App.self.cacheDir, "install.zip")
+
+    @Throws(IOException::class)
+    private fun unzipAndCheck(): Boolean {
+        unzip(tmpFile, tmpFile.parentFile!!, "META-INF/com/google/android", true)
+        return Shell.su("grep -q '#MAGISK' ${File(tmpFile.parentFile, "updater-script")}")
+                .exec().isSuccess
+    }
+
+    @Throws(IOException::class)
+    private fun flash(): Boolean {
+        console.add("- Copying zip to temp directory")
+        try {
+            App.self.readUri(mUri).use { input ->
+                tmpFile.outputStream().use { out -> input.copyTo(out) }
+            }
+        } catch (e: FileNotFoundException) {
+            console.add("! Invalid Uri")
+            throw e
+        } catch (e: IOException) {
+            console.add("! Cannot copy to cache")
+            throw e
+        }
+
+        try {
+            if (!unzipAndCheck()) {
+                console.add("! This zip is not a Magisk Module!")
+                return false
+            }
+        } catch (e: IOException) {
+            console.add("! Unzip error")
+            throw e
+        }
+
+        console.add("- Installing ${mUri.fileName}")
+        return Shell.su("cd " + tmpFile.parent!!,
+                "BOOTMODE=true sh update-binary dummy 1 $tmpFile")
+                .to(console, logs)
+                .exec().isSuccess
+    }
+
+    fun exec() {
+        App.THREAD_POOL.execute {
+            val success = try {
+                flash()
+            } catch (e: IOException) {
+                false
+            }
+            Shell.su("cd /", "rm -rf ${tmpFile.parent} ${Const.TMP_FOLDER_PATH}").submit()
+            UiThreadHandler.run { onResult(success) }
+        }
+    }
+
+    protected abstract fun onResult(success: Boolean)
+}
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashViewModel.kt b/app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashViewModel.kt
index 4dbc278c7..968faeab4 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashViewModel.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/flash/FlashViewModel.kt
@@ -24,6 +24,8 @@ import com.topjohnwu.magisk.utils.*
 import com.topjohnwu.superuser.Shell
 import me.tatarka.bindingcollectionadapter2.ItemBinding
 import java.io.File
+import java.util.Collections
+import kotlin.collections.ArrayList
 
 class FlashViewModel(
     action: String,
@@ -42,30 +44,36 @@ class FlashViewModel(
         itemBinding.bindExtra(BR.viewModel, this@FlashViewModel)
     }
 
-    private val rawItems = ObservableArrayList<String>()
-    private val logItems = ObservableArrayList<String>()
+    private val outItems = object : ObservableArrayList<String>() {
+        override fun add(element: String?): Boolean {
+            if (element != null)
+                logItems.add(element)
+            return super.add(element)
+        }
+    }
+    private val logItems = Collections.synchronizedList(ArrayList<String>())
 
     init {
-        rawItems.sendUpdatesTo(items) { it.map { ConsoleRvItem(it) } }
+        outItems.sendUpdatesTo(items) { it.map { ConsoleRvItem(it) } }
 
         state = State.LOADING
 
         val uri = uri ?: Uri.EMPTY
         when (action) {
             Const.Value.FLASH_ZIP -> Flashing
-                .Install(uri, rawItems, logItems, this)
+                .Install(uri, outItems, logItems, this)
                 .exec()
             Const.Value.UNINSTALL -> Flashing
-                .Uninstall(uri, rawItems, logItems, this)
+                .Uninstall(uri, outItems, logItems, this)
                 .exec()
             Const.Value.FLASH_MAGISK -> Patching
-                .Direct(rawItems, logItems, this)
+                .Direct(outItems, logItems, this)
                 .exec()
             Const.Value.FLASH_INACTIVE_SLOT -> Patching
-                .SecondSlot(rawItems, logItems, this)
+                .SecondSlot(outItems, logItems, this)
                 .exec()
             Const.Value.PATCH_FILE -> Patching
-                .File(uri, rawItems, logItems, this)
+                .File(uri, outItems, logItems, this)
                 .exec()
         }
     }
@@ -90,16 +98,12 @@ class FlashViewModel(
         .map { Const.MAGISK_INSTALL_LOG_FILENAME.format(it) }
         .map { File(Const.EXTERNAL_PATH, it) }
         .map { file ->
-            val log = items.filterIsInstance<ConsoleRvItem>()
-                .joinToString("\n") { it.item }
-            file.writeText(log)
-
-            val rawLog = logItems.toList().joinToString("\n")
-            if (rawLog.isNotBlank()) {
-                file.appendText("\n=== LOG ===\n")
-                file.appendText(rawLog)
+            file.bufferedWriter().use { writer ->
+                logItems.forEach {
+                    writer.write(it)
+                    writer.newLine()
+                }
             }
-
             file.path
         }
         .subscribeK { SnackbarEvent(it).publish() }
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/DownloadApp.java b/app/src/main/java/com/topjohnwu/magisk/utils/DownloadApp.java
index 39727e52d..e10d38420 100644
--- a/app/src/main/java/com/topjohnwu/magisk/utils/DownloadApp.java
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/DownloadApp.java
@@ -89,7 +89,7 @@ public class DownloadApp {
             // Make it world readable
             apk.setReadable(true, false);
             if (Shell.su("pm install " + apk).exec().isSuccess())
-                RootUtils.rmAndLaunch(app.getPackageName(),
+                RootUtils.Companion.rmAndLaunch(app.getPackageName(),
                         new ComponentName(BuildConfig.APPLICATION_ID,
                                 ClassMap.get(SplashActivity.class).getName()));
             progress.dismiss();
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/PatchAPK.java b/app/src/main/java/com/topjohnwu/magisk/utils/PatchAPK.java
index 0d77c058a..95389302f 100644
--- a/app/src/main/java/com/topjohnwu/magisk/utils/PatchAPK.java
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/PatchAPK.java
@@ -3,6 +3,8 @@ package com.topjohnwu.magisk.utils;
 import android.content.ComponentName;
 import android.widget.Toast;
 
+import androidx.core.app.NotificationCompat;
+
 import com.topjohnwu.magisk.App;
 import com.topjohnwu.magisk.BuildConfig;
 import com.topjohnwu.magisk.ClassMap;
@@ -27,8 +29,6 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.jar.JarEntry;
 
-import androidx.core.app.NotificationCompat;
-
 public class PatchAPK {
 
     public static final String LOWERALPHA = "abcdefghijklmnopqrstuvwxyz";
@@ -112,7 +112,7 @@ public class PatchAPK {
 
         Config.set(Config.Key.SU_MANAGER, pkg);
         Config.export();
-        RootUtils.rmAndLaunch(BuildConfig.APPLICATION_ID,
+        RootUtils.Companion.rmAndLaunch(BuildConfig.APPLICATION_ID,
                 new ComponentName(pkg, ClassMap.get(SplashActivity.class).getName()));
 
         return true;
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/RootUtils.java b/app/src/main/java/com/topjohnwu/magisk/utils/RootUtils.java
deleted file mode 100644
index 216c2a3d0..000000000
--- a/app/src/main/java/com/topjohnwu/magisk/utils/RootUtils.java
+++ /dev/null
@@ -1,149 +0,0 @@
-package com.topjohnwu.magisk.utils;
-
-import android.content.ComponentName;
-import android.content.Context;
-import android.content.Intent;
-import android.net.Uri;
-import android.os.Bundle;
-
-import androidx.annotation.NonNull;
-
-import com.topjohnwu.magisk.Config;
-import com.topjohnwu.magisk.Const;
-import com.topjohnwu.magisk.R;
-import com.topjohnwu.superuser.Shell;
-import com.topjohnwu.superuser.ShellUtils;
-import com.topjohnwu.superuser.io.SuFile;
-
-import java.io.InputStream;
-import java.lang.reflect.Array;
-import java.util.ArrayList;
-import java.util.List;
-
-public class RootUtils extends Shell.Initializer {
-
-    public static void rmAndLaunch(String rm, ComponentName component) {
-        Shell.su(Utils.fmt("(rm_launch %s %s)&", rm, component.flattenToString())).exec();
-    }
-
-    public static void reboot() {
-        Shell.su("/system/bin/reboot" + (Config.recovery ? " recovery" : "")).submit();
-    }
-
-    public static void startActivity(Intent intent) {
-        if (intent.getComponent() == null)
-            return;
-        List<String> args = new ArrayList<>();
-        args.add("am");
-        args.add("start");
-        intentToCommand(intent, args);
-        Shell.su(Utils.argsToCommand(args)).exec();
-    }
-
-    public static void intentToCommand(Intent intent, List<String> args) {
-        if (intent.getAction() != null) {
-            args.add("-a");
-            args.add(intent.getAction());
-        }
-        if (intent.getComponent() != null) {
-            args.add("-n");
-            args.add(intent.getComponent().flattenToString());
-        }
-        if (intent.getData() != null) {
-            args.add("-d");
-            args.add(intent.getDataString());
-        }
-        if (intent.getCategories() != null) {
-            for (String cat : intent.getCategories()) {
-                args.add("-c");
-                args.add(cat);
-            }
-        }
-        if (intent.getType() != null) {
-            args.add("-t");
-            args.add(intent.getType());
-        }
-        Bundle extras = intent.getExtras();
-        if (extras != null) {
-            for (String key : extras.keySet()) {
-                Object val = extras.get(key);
-                if (val == null)
-                    continue;
-                Object value = val;
-                String arg;
-                if (val instanceof String)          arg = "--es";
-                else if (val instanceof Boolean)    arg = "--ez";
-                else if (val instanceof Integer)    arg = "--ei";
-                else if (val instanceof Long)       arg = "--el";
-                else if (val instanceof Float)      arg = "--ef";
-                else if (val instanceof Uri)        arg = "--eu";
-                else if (val instanceof ComponentName) {
-                    arg = "--ecn";
-                    value = ((ComponentName) val).flattenToString();
-                } else if (val instanceof ArrayList) {
-                    ArrayList arr = (ArrayList) val;
-                    if (arr.size() <= 0)
-                    /* Impossible to know the type due to type erasure */
-                        continue;
-
-                    if (arr.get(0) instanceof Integer)      arg = "--eial";
-                    else if (arr.get(0) instanceof Long)    arg = "--elal";
-                    else if (arr.get(0) instanceof Float)   arg = "--efal";
-                    else if (arr.get(0) instanceof String)  arg = "--esal";
-                    else                                    continue;  /* Unsupported */
-                    StringBuilder sb = new StringBuilder();
-                    for (Object o : arr) {
-                        sb.append(o.toString().replace(",", "\\,"));
-                        sb.append(',');
-                    }
-                    // Remove trailing comma
-                    sb.deleteCharAt(sb.length() - 1);
-                    value = sb;
-                } else if (val.getClass().isArray()) {
-                    if (val instanceof int[])           arg = "--eia";
-                    else if (val instanceof long[])     arg = "--ela";
-                    else if (val instanceof float[])    arg = "--efa";
-                    else if (val instanceof String[])   arg = "--esa";
-                    else                                continue;  /* Unsupported */
-                    StringBuilder sb = new StringBuilder();
-                    int len = Array.getLength(val);
-                    for (int i = 0; i < len; ++i) {
-                        sb.append(Array.get(val, i).toString().replace(",", "\\,"));
-                        sb.append(',');
-                    }
-                    // Remove trailing comma
-                    sb.deleteCharAt(sb.length() - 1);
-                    value = sb;
-                }
-                else continue;  /* Unsupported */
-
-                args.add(arg);
-                args.add(key);
-                args.add(value.toString());
-            }
-        }
-        args.add("-f");
-        args.add(String.valueOf(intent.getFlags()));
-    }
-
-    @Override
-    public boolean onInit(Context context, @NonNull Shell shell) {
-        Shell.Job job = shell.newJob();
-        if (shell.isRoot()) {
-            job.add(context.getResources().openRawResource(R.raw.util_functions))
-                .add(context.getResources().openRawResource(R.raw.utils));
-            Const.MAGISK_DISABLE_FILE = new SuFile("/cache/.disable_magisk");
-            Config.loadMagiskInfo();
-        } else {
-            InputStream nonroot = context.getResources().openRawResource(R.raw.nonroot_utils);
-            job.add(nonroot);
-        }
-
-        job.add("mount_partitions", "get_flags", "run_migrations", "export BOOTMODE=true").exec();
-
-        Config.keepVerity = Boolean.parseBoolean(ShellUtils.fastCmd("echo $KEEPVERITY"));
-        Config.keepEnc = Boolean.parseBoolean(ShellUtils.fastCmd("echo $KEEPFORCEENCRYPT"));
-        Config.recovery = Boolean.parseBoolean(ShellUtils.fastCmd("echo $RECOVERYMODE"));
-        return true;
-    }
-}
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/RootUtils.kt b/app/src/main/java/com/topjohnwu/magisk/utils/RootUtils.kt
new file mode 100644
index 000000000..baa9ed7dd
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/RootUtils.kt
@@ -0,0 +1,164 @@
+package com.topjohnwu.magisk.utils
+
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import com.topjohnwu.magisk.Config
+import com.topjohnwu.magisk.Const
+import com.topjohnwu.magisk.R
+import com.topjohnwu.superuser.Shell
+import com.topjohnwu.superuser.ShellUtils
+import com.topjohnwu.superuser.io.SuFile
+import java.util.*
+import java.lang.reflect.Array as RArray
+
+fun Intent.toCommand(args: MutableList<String>) {
+    if (action != null) {
+        args.add("-a")
+        args.add(action!!)
+    }
+    if (component != null) {
+        args.add("-n")
+        args.add(component!!.flattenToString())
+    }
+    if (data != null) {
+        args.add("-d")
+        args.add(dataString!!)
+    }
+    if (categories != null) {
+        for (cat in categories) {
+            args.add("-c")
+            args.add(cat)
+        }
+    }
+    if (type != null) {
+        args.add("-t")
+        args.add(type!!)
+    }
+    val extras = extras
+    if (extras != null) {
+        for (key in extras.keySet()) {
+            val v = extras.get(key) ?: continue
+            var value: Any = v
+            val arg: String
+            if (v is String)
+                arg = "--es"
+            else if (v is Boolean)
+                arg = "--ez"
+            else if (v is Int)
+                arg = "--ei"
+            else if (v is Long)
+                arg = "--el"
+            else if (v is Float)
+                arg = "--ef"
+            else if (v is Uri)
+                arg = "--eu"
+            else if (v is ComponentName) {
+                arg = "--ecn"
+                value = v.flattenToString()
+            } else if (v is ArrayList<*>) {
+                if (v.size <= 0)
+                /* Impossible to know the type due to type erasure */
+                    continue
+
+                arg = if (v[0] is Int)
+                    "--eial"
+                else if (v[0] is Long)
+                    "--elal"
+                else if (v[0] is Float)
+                    "--efal"
+                else if (v[0] is String)
+                    "--esal"
+                else
+                    continue  /* Unsupported */
+
+                val sb = StringBuilder()
+                for (o in v) {
+                    sb.append(o.toString().replace(",", "\\,"))
+                    sb.append(',')
+                }
+                // Remove trailing comma
+                sb.deleteCharAt(sb.length - 1)
+                value = sb
+            } else if (v.javaClass.isArray) {
+                arg = if (v is IntArray)
+                    "--eia"
+                else if (v is LongArray)
+                    "--ela"
+                else if (v is FloatArray)
+                    "--efa"
+                else if (v is Array<*> && v.isArrayOf<String>())
+                    "--esa"
+                else
+                    continue  /* Unsupported */
+
+                val sb = StringBuilder()
+                val len = RArray.getLength(v)
+                for (i in 0 until len) {
+                    sb.append(RArray.get(v, i)!!.toString().replace(",", "\\,"))
+                    sb.append(',')
+                }
+                // Remove trailing comma
+                sb.deleteCharAt(sb.length - 1)
+                value = sb
+            } else
+                continue  /* Unsupported */
+
+            args.add(arg)
+            args.add(key)
+            args.add(value.toString())
+        }
+    }
+    args.add("-f")
+    args.add(flags.toString())
+}
+
+fun startActivity(intent: Intent) {
+    if (intent.component == null)
+        return
+    val args = ArrayList<String>()
+    args.add("am")
+    args.add("start")
+    intent.toCommand(args)
+    Shell.su(args.toShellCmd()).exec()
+}
+
+class RootUtils : Shell.Initializer() {
+
+    override fun onInit(context: Context?, shell: Shell): Boolean {
+        context ?: return false
+
+        val job = shell.newJob()
+        if (shell.isRoot) {
+            job.add(context.rawResource(R.raw.util_functions))
+                    .add(context.rawResource(R.raw.utils))
+            Const.MAGISK_DISABLE_FILE = SuFile("/cache/.disable_magisk")
+            Config.loadMagiskInfo()
+        } else {
+            job.add(context.rawResource(R.raw.nonroot_utils))
+        }
+
+        job.add("mount_partitions",
+                "get_flags",
+                "run_migrations",
+                "export BOOTMODE=true")
+                .exec()
+
+        Config.keepVerity = ShellUtils.fastCmd("echo \$KEEPVERITY").toBoolean()
+        Config.keepEnc = ShellUtils.fastCmd("echo \$KEEPFORCEENCRYPT").toBoolean()
+        Config.recovery = ShellUtils.fastCmd("echo \$RECOVERYMODE").toBoolean()
+        return true
+    }
+
+    companion object {
+
+        fun rmAndLaunch(rm: String, component: ComponentName) {
+            Shell.su("(rm_launch $rm ${component.flattenToString()})").exec()
+        }
+
+        fun reboot() {
+            Shell.su("/system/bin/reboot ${if (Config.recovery) "recovery" else ""}").submit()
+        }
+    }
+}
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/Utils.java b/app/src/main/java/com/topjohnwu/magisk/utils/Utils.java
index 1cbcb06d5..83c686696 100644
--- a/app/src/main/java/com/topjohnwu/magisk/utils/Utils.java
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/Utils.java
@@ -12,6 +12,12 @@ import android.net.Uri;
 import android.provider.OpenableColumns;
 import android.widget.Toast;
 
+import androidx.work.Constraints;
+import androidx.work.ExistingPeriodicWorkPolicy;
+import androidx.work.NetworkType;
+import androidx.work.PeriodicWorkRequest;
+import androidx.work.WorkManager;
+
 import com.topjohnwu.magisk.App;
 import com.topjohnwu.magisk.BuildConfig;
 import com.topjohnwu.magisk.ClassMap;
@@ -25,17 +31,10 @@ import com.topjohnwu.superuser.Shell;
 import com.topjohnwu.superuser.internal.UiThreadHandler;
 import com.topjohnwu.superuser.io.SuFile;
 
-import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
-import androidx.work.Constraints;
-import androidx.work.ExistingPeriodicWorkPolicy;
-import androidx.work.NetworkType;
-import androidx.work.PeriodicWorkRequest;
-import androidx.work.WorkManager;
-
 public class Utils {
 
     public static void toast(CharSequence msg, int duration) {
@@ -59,24 +58,6 @@ public class Utils {
         return getPrefsInt(prefs, key, 0);
     }
 
-    public static String getNameFromUri(Context context, Uri uri) {
-        String name = null;
-        try (Cursor c = context.getContentResolver().query(uri, null, null, null, null)) {
-            if (c != null) {
-                int nameIndex = c.getColumnIndex(OpenableColumns.DISPLAY_NAME);
-                if (nameIndex != -1) {
-                    c.moveToFirst();
-                    name = c.getString(nameIndex);
-                }
-            }
-        }
-        if (name == null) {
-            int idx = uri.getPath().lastIndexOf('/');
-            name = uri.getPath().substring(idx + 1);
-        }
-        return name;
-    }
-
     public static int dpInPx(int dp) {
         float scale = App.self.getResources().getDisplayMetrics().density;
         return (int) (dp * scale + 0.5);
@@ -166,18 +147,4 @@ public class Utils {
         }
     }
 
-    public static String argsToCommand(List<String> args) {
-        StringBuilder sb = new StringBuilder();
-        for (String s : args) {
-            if (s.contains(" ")) {
-                sb.append('"').append(s).append('"');
-            } else {
-                sb.append(s);
-            }
-            sb.append(' ');
-        }
-        sb.deleteCharAt(sb.length() - 1);
-        return sb.toString();
-    }
-
 }
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/XAndroid.kt b/app/src/main/java/com/topjohnwu/magisk/utils/XAndroid.kt
index bf594c755..0db67d30b 100644
--- a/app/src/main/java/com/topjohnwu/magisk/utils/XAndroid.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/XAndroid.kt
@@ -1,10 +1,15 @@
 package com.topjohnwu.magisk.utils
 
+import android.content.Context
 import android.content.pm.ApplicationInfo
 import android.content.pm.ComponentInfo
 import android.content.pm.PackageInfo
 import android.content.pm.PackageManager
 import android.content.pm.PackageManager.*
+import android.net.Uri
+import android.provider.OpenableColumns
+import com.topjohnwu.magisk.App
+import java.io.FileNotFoundException
 
 val PackageInfo.processes
     get() = activities?.processNames.orEmpty() +
@@ -37,6 +42,22 @@ val ApplicationInfo.packageInfo: PackageInfo?
         }
     }
 
+val Uri.fileName: String get() {
+    var name: String? = null
+    App.self.contentResolver.query(this, null, null, null, null)?.use { c ->
+        val nameIndex = c.getColumnIndex(OpenableColumns.DISPLAY_NAME)
+        if (nameIndex != -1) {
+            c.moveToFirst()
+            name = c.getString(nameIndex)
+        }
+    }
+    if (name == null && path != null) {
+        val idx = path!!.lastIndexOf('/')
+        name = path!!.substring(idx + 1)
+    }
+    return name.orEmpty()
+}
+
 fun PackageManager.activities(packageName: String) =
     getPackageInfo(packageName, GET_ACTIVITIES)
 
@@ -47,4 +68,9 @@ fun PackageManager.receivers(packageName: String) =
     getPackageInfo(packageName, GET_RECEIVERS).receivers
 
 fun PackageManager.providers(packageName: String) =
-    getPackageInfo(packageName, GET_PROVIDERS).providers
\ No newline at end of file
+    getPackageInfo(packageName, GET_PROVIDERS).providers
+
+fun Context.rawResource(id: Int) = resources.openRawResource(id)
+
+fun Context.readUri(uri: Uri) = contentResolver.openInputStream(uri) ?: throw FileNotFoundException()
+
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/XList.kt b/app/src/main/java/com/topjohnwu/magisk/utils/XList.kt
index 705ee9bb3..26b5009fa 100644
--- a/app/src/main/java/com/topjohnwu/magisk/utils/XList.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/XList.kt
@@ -10,6 +10,20 @@ fun <T> MutableList<T>.update(newList: List<T>) {
     addAll(newList)
 }
 
+fun List<String>.toShellCmd() : String {
+    val sb = StringBuilder()
+    for (s in this) {
+        if (s.contains(" ")) {
+            sb.append('"').append(s).append('"')
+        } else {
+            sb.append(s)
+        }
+        sb.append(' ')
+    }
+    sb.deleteCharAt(sb.length - 1)
+    return sb.toString()
+}
+
 fun <T1, T2> ObservableList<T1>.sendUpdatesTo(
     target: DiffObservableList<T2>,
     mapper: (List<T1>) -> List<T2>
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/ZipUtils.java b/app/src/main/java/com/topjohnwu/magisk/utils/ZipUtils.java
deleted file mode 100644
index 42bfcbdd8..000000000
--- a/app/src/main/java/com/topjohnwu/magisk/utils/ZipUtils.java
+++ /dev/null
@@ -1,65 +0,0 @@
-package com.topjohnwu.magisk.utils;
-
-import com.topjohnwu.signing.JarMap;
-import com.topjohnwu.signing.SignAPK;
-import com.topjohnwu.superuser.ShellUtils;
-import com.topjohnwu.superuser.io.SuFile;
-import com.topjohnwu.superuser.io.SuFileOutputStream;
-
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipInputStream;
-
-public class ZipUtils {
-
-    public static void unzip(File zip, File folder, String path, boolean junkPath) throws IOException {
-        InputStream in = new BufferedInputStream(new FileInputStream(zip));
-        unzip(in, folder, path, junkPath);
-        in.close();
-    }
-
-    public static void unzip(InputStream zip, File folder, String path, boolean junkPath) throws IOException {
-        try {
-            ZipInputStream zipfile = new ZipInputStream(zip);
-            ZipEntry entry;
-            while ((entry = zipfile.getNextEntry()) != null) {
-                if (!entry.getName().startsWith(path) || entry.isDirectory()){
-                    // Ignore directories, only create files
-                    continue;
-                }
-                String name;
-                if (junkPath) {
-                    name = entry.getName().substring(entry.getName().lastIndexOf('/') + 1);
-                } else {
-                    name = entry.getName();
-                }
-                File dest = new File(folder, name);
-                if (!dest.getParentFile().exists() && !dest.getParentFile().mkdirs()) {
-                    dest = new SuFile(folder, name);
-                    dest.getParentFile().mkdirs();
-                }
-                try (OutputStream out = new SuFileOutputStream(dest)) {
-                    ShellUtils.pump(zipfile, out);
-                }
-            }
-        }
-        catch(IOException e) {
-            e.printStackTrace();
-            throw e;
-        }
-    }
-
-    public static void signZip(File input, File output) throws Exception {
-        try (JarMap map = new JarMap(input, false);
-             BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(output))) {
-            SignAPK.sign(map, out);
-        }
-    }
-}
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/ZipUtils.kt b/app/src/main/java/com/topjohnwu/magisk/utils/ZipUtils.kt
new file mode 100644
index 000000000..80a90a13a
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/ZipUtils.kt
@@ -0,0 +1,45 @@
+package com.topjohnwu.magisk.utils
+
+import com.topjohnwu.superuser.io.SuFile
+import com.topjohnwu.superuser.io.SuFileOutputStream
+import java.io.File
+import java.io.IOException
+import java.io.InputStream
+import java.util.zip.ZipEntry
+import java.util.zip.ZipInputStream
+
+@Throws(IOException::class)
+fun unzip(zip: File, folder: File, path: String = "", junkPath: Boolean = false) {
+    zip.inputStream().buffered().use {
+        unzip(it, folder, path, junkPath)
+    }
+}
+
+@Throws(IOException::class)
+fun unzip(zip: InputStream, folder: File, path: String, junkPath: Boolean) {
+    try {
+        val zin = ZipInputStream(zip)
+        var entry: ZipEntry
+        while (true) {
+            entry = zin.nextEntry ?: break
+            if (!entry.name.startsWith(path) || entry.isDirectory) {
+                // Ignore directories, only create files
+                continue
+            }
+            val name = if (junkPath)
+                entry.name.substring(entry.name.lastIndexOf('/') + 1)
+            else
+                entry.name
+
+            var dest = File(folder, name)
+            if (!dest.parentFile!!.exists() && !dest.parentFile!!.mkdirs()) {
+                dest = SuFile(folder, name)
+                dest.parentFile!!.mkdirs()
+            }
+            SuFileOutputStream(dest).use { out -> zin.copyTo(out) }
+        }
+    } catch (e: IOException) {
+        e.printStackTrace()
+        throw e
+    }
+}
diff --git a/app/src/main/java/com/topjohnwu/magisk/view/SnackbarMaker.java b/app/src/main/java/com/topjohnwu/magisk/view/SnackbarMaker.java
index dc0f1ca61..5884824e1 100644
--- a/app/src/main/java/com/topjohnwu/magisk/view/SnackbarMaker.java
+++ b/app/src/main/java/com/topjohnwu/magisk/view/SnackbarMaker.java
@@ -5,11 +5,11 @@ import android.net.Uri;
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.StringRes;
+
 import com.google.android.material.snackbar.Snackbar;
 import com.topjohnwu.magisk.R;
-import com.topjohnwu.magisk.utils.Utils;
-
-import androidx.annotation.StringRes;
+import com.topjohnwu.magisk.utils.XAndroidKt;
 
 public class SnackbarMaker {
 
@@ -41,7 +41,7 @@ public class SnackbarMaker {
 
     public static void showUri(Activity activity, Uri uri) {
         make(activity, activity.getString(R.string.internal_storage,
-                "/Download/" + Utils.getNameFromUri(activity, uri)),
+                "/Download/" + XAndroidKt.getFileName(uri)),
                 Snackbar.LENGTH_LONG)
                 .setAction(R.string.ok, (v)->{}).show();
     }
diff --git a/app/src/main/java/com/topjohnwu/magisk/view/dialogs/EnvFixDialog.java b/app/src/main/java/com/topjohnwu/magisk/view/dialogs/EnvFixDialog.java
index 95e1364b6..aff566fb3 100644
--- a/app/src/main/java/com/topjohnwu/magisk/view/dialogs/EnvFixDialog.java
+++ b/app/src/main/java/com/topjohnwu/magisk/view/dialogs/EnvFixDialog.java
@@ -4,6 +4,8 @@ import android.app.Activity;
 import android.app.ProgressDialog;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
+
 import com.topjohnwu.magisk.R;
 import com.topjohnwu.magisk.tasks.MagiskInstaller;
 import com.topjohnwu.magisk.utils.RootUtils;
@@ -12,8 +14,6 @@ import com.topjohnwu.superuser.Shell;
 import com.topjohnwu.superuser.internal.UiThreadHandler;
 import com.topjohnwu.superuser.io.SuFile;
 
-import androidx.annotation.NonNull;
-
 public class EnvFixDialog extends CustomAlertDialog {
 
     public EnvFixDialog(@NonNull Activity activity) {
@@ -38,7 +38,7 @@ public class EnvFixDialog extends CustomAlertDialog {
                     pd.dismiss();
                     Utils.toast(success ? R.string.reboot_delay_toast : R.string.setup_fail, Toast.LENGTH_LONG);
                     if (success)
-                        UiThreadHandler.handler.postDelayed(RootUtils::reboot, 5000);
+                        UiThreadHandler.handler.postDelayed(RootUtils.Companion::reboot, 5000);
                 }
             }.exec();
         });