feat: Improve installation robustness (#1528)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>
Co-authored-by: Ushie <ushiekane@gmail.com>
Co-authored-by: Dhruvan Bhalara <53393418+dhruvanbhalara@users.noreply.github.com>
Co-authored-by: Pun Butrach <pun.butrach@gmail.com>

android/app/src/main/AndroidManifest.xml

@@ -32,17 +32,17 @@
             android:hardwareAccelerated="true"
             android:windowSoftInputMode="adjustResize">
             <meta-data
-              android:name="io.flutter.embedding.android.NormalTheme"
-              android:resource="@style/NormalTheme"/>
+                android:name="io.flutter.embedding.android.NormalTheme"
+                android:resource="@style/NormalTheme" />
             <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-       <activity
-           android:name=".ExportSettingsActivity"
-           android:exported="true">
-       </activity>
+        <activity
+            android:name=".ExportSettingsActivity"
+            android:exported="true">
+        </activity>
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
@@ -55,5 +55,22 @@
                 android:name="android.support.FILE_PROVIDER_PATHS"
                 android:resource="@xml/file_paths" />
         </provider>
+
+        <receiver
+            android:name=".utils.packageInstaller.InstallerReceiver"
+            android:enabled="true"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="APP_INSTALL_ACTION" />
+            </intent-filter>
+        </receiver>
+        <receiver
+            android:name=".utils.packageInstaller.UninstallerReceiver"
+            android:enabled="true"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="APP_UNINSTALL_ACTION" />
+            </intent-filter>
+        </receiver>
     </application>
 </manifest>

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

@@ -1,11 +1,16 @@
 package app.revanced.manager.flutter
 
+import android.app.PendingIntent
 import android.app.SearchManager
 import android.content.Intent
+import android.content.pm.PackageInstaller
+import android.os.Build
 import android.os.Handler
 import android.os.Looper
 import app.revanced.manager.flutter.utils.Aapt
 import app.revanced.manager.flutter.utils.aligning.ZipAligner
+import app.revanced.manager.flutter.utils.packageInstaller.InstallerReceiver
+import app.revanced.manager.flutter.utils.packageInstaller.UninstallerReceiver
 import app.revanced.manager.flutter.utils.signing.Signer
 import app.revanced.manager.flutter.utils.zip.ZipFile
 import app.revanced.manager.flutter.utils.zip.structures.ZipEntry
@@ -184,12 +189,24 @@ class MainActivity : FlutterActivity() {
                     }.toString().let(result::success)
                 }
 
+                "installApk" -> {
+                    val apkPath = call.argument<String>("apkPath")!!
+                    PackageInstallerManager.result = result
+                    installApk(apkPath)
+                }
+
+                "uninstallApp" -> {
+                    val packageName = call.argument<String>("packageName")!!
+                    uninstallApp(packageName)
+                    PackageInstallerManager.result = result
+                }
+
                 else -> result.notImplemented()
             }
         }
     }
 
-    fun openBrowser(query: String?) {
+    private fun openBrowser(query: String?) {
         val intent = Intent(Intent.ACTION_WEB_SEARCH).apply {
             putExtra(SearchManager.QUERY, query)
         }
@@ -407,4 +424,44 @@ class MainActivity : FlutterActivity() {
             handler.post { result.success(null) }
         }.start()
     }
+
+    private fun installApk(apkPath: String) {
+        val packageInstaller: PackageInstaller = applicationContext.packageManager.packageInstaller
+        val sessionParams = PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL)
+        val sessionId: Int = packageInstaller.createSession(sessionParams)
+        val session: PackageInstaller.Session = packageInstaller.openSession(sessionId)
+        session.use { activeSession ->
+            val sessionOutputStream = activeSession.openWrite(applicationContext.packageName, 0, -1)
+            sessionOutputStream.use { outputStream ->
+                val apkFile = File(apkPath)
+                apkFile.inputStream().use { inputStream ->
+                    inputStream.copyTo(outputStream)
+                }
+            }
+        }
+        val receiverIntent = Intent(applicationContext, InstallerReceiver::class.java).apply {
+            action = "APP_INSTALL_ACTION"
+        }
+        val receiverPendingIntent = PendingIntent.getBroadcast(context, sessionId, receiverIntent, PackageInstallerManager.flags)
+        session.commit(receiverPendingIntent.intentSender)
+        session.close()
+    }
+
+    private fun uninstallApp(packageName: String) {
+        val packageInstaller: PackageInstaller = applicationContext.packageManager.packageInstaller
+        val receiverIntent = Intent(applicationContext, UninstallerReceiver::class.java).apply {
+            action = "APP_UNINSTALL_ACTION"
+        }
+        val receiverPendingIntent = PendingIntent.getBroadcast(context, 0, receiverIntent, PackageInstallerManager.flags)
+        packageInstaller.uninstall(packageName, receiverPendingIntent.intentSender)
+    }
+
+    object PackageInstallerManager {
+        var result: MethodChannel.Result? = null
+        val flags = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            PendingIntent.FLAG_MUTABLE or PendingIntent.FLAG_UPDATE_CURRENT
+        } else {
+            PendingIntent.FLAG_UPDATE_CURRENT
+        }
+    }
 }

android/app/src/main/kotlin/app/revanced/manager/flutter/utils/packageInstaller/InstallerReceiver.kt

@@ -0,0 +1,32 @@
+package app.revanced.manager.flutter.utils.packageInstaller
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageInstaller
+import app.revanced.manager.flutter.MainActivity
+
+class InstallerReceiver : BroadcastReceiver() {
+    override fun onReceive(context: Context, intent: Intent) {
+        when (val status = intent.getIntExtra(PackageInstaller.EXTRA_STATUS, -1)) {
+            PackageInstaller.STATUS_PENDING_USER_ACTION -> {
+                val confirmationIntent = intent.getParcelableExtra<Intent>(Intent.EXTRA_INTENT)
+                if (confirmationIntent != null) {
+                    context.startActivity(confirmationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+                }
+            }
+
+            else -> {
+                val packageName = intent.getStringExtra(PackageInstaller.EXTRA_PACKAGE_NAME)
+                val message = intent.getStringExtra(PackageInstaller.EXTRA_STATUS_MESSAGE)
+                val otherPackageName = intent.getStringExtra(PackageInstaller.EXTRA_OTHER_PACKAGE_NAME)
+                MainActivity.PackageInstallerManager.result!!.success(mapOf(
+                    "status" to status,
+                    "packageName" to packageName,
+                    "message" to message,
+                    "otherPackageName" to otherPackageName
+                ))
+            }
+        }
+    }
+}

android/app/src/main/kotlin/app/revanced/manager/flutter/utils/packageInstaller/UninstallerReceiver.kt

@@ -0,0 +1,24 @@
+package app.revanced.manager.flutter.utils.packageInstaller
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageInstaller
+import app.revanced.manager.flutter.MainActivity
+
+class UninstallerReceiver : BroadcastReceiver() {
+    override fun onReceive(context: Context, intent: Intent) {
+        when (val status = intent.getIntExtra(PackageInstaller.EXTRA_STATUS, -1)) {
+            PackageInstaller.STATUS_PENDING_USER_ACTION -> {
+                val confirmationIntent = intent.getParcelableExtra<Intent>(Intent.EXTRA_INTENT)
+                if (confirmationIntent != null) {
+                    context.startActivity(confirmationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+                }
+            }
+
+            else -> {
+                MainActivity.PackageInstallerManager.result!!.success(status)
+            }
+        }
+    }
+}