Patch app label when repackaging

app/src/full/AndroidManifest.xml

@@ -21,7 +21,6 @@
             android:exported="true" />
         <activity
             android:name="a.c"
-            android:label="@string/app_name"
             android:configChanges="orientation|screenSize"
             android:exported="true"
             android:theme="@style/SplashTheme">

app/src/full/java/com/topjohnwu/magisk/asyncs/PatchAPK.java

@@ -20,6 +20,7 @@ import com.topjohnwu.utils.SignAPK;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.nio.CharBuffer;
+import java.nio.IntBuffer;
 import java.security.SecureRandom;
 import java.util.jar.JarEntry;
 
@@ -80,6 +81,18 @@ public class PatchAPK {
         return true;
     }
 
+    private static boolean findAndPatch(byte xml[], int a, int b) {
+        IntBuffer buf = ByteBuffer.wrap(xml).order(ByteOrder.LITTLE_ENDIAN).asIntBuffer();
+        int len = xml.length / 4;
+        for (int i = 0; i < len; ++i) {
+            if (buf.get(i) == a) {
+                buf.put(i, b);
+                return true;
+            }
+        }
+        return false;
+    }
+
     private static boolean patchAndHide() {
         MagiskManager mm = Data.MM();
 
@@ -115,7 +128,8 @@ public class PatchAPK {
             byte xml[] = apk.getRawData(je);
 
             if (!findAndPatch(xml, from, to) ||
-                    !findAndPatch(xml, from + ".provider", to + ".provider"))
+                    !findAndPatch(xml, from + ".provider", to + ".provider") ||
+                    !findAndPatch(xml, R.string.app_name, R.string.re_app_name))
                 return false;
 
             // Write in changes

app/src/main/AndroidManifest.xml

@@ -13,7 +13,7 @@
         android:allowBackup="false"
         android:directBootAware="true"
         android:icon="@drawable/ic_launcher"
-        android:label="@string/re_app_name"
+        android:label="@string/app_name"
         android:supportsRtl="true"
         tools:ignore="GoogleAppIndexingWarning,UnusedAttribute">
 

app/src/stub/AndroidManifest.xml

@@ -6,7 +6,6 @@
     <application
         tools:ignore="GoogleAppIndexingWarning">
         <activity
-            android:label="@string/app_name"
             android:name=".MainActivity"
             android:theme="@android:style/Theme.Translucent.NoTitleBar">
             <intent-filter>