Now it looks good

android/app/src/main/kotlin/dev/imranr/obtainium/MainActivity.kt

@@ -1,10 +1,5 @@
 package dev.imranr.obtainium
 
-import io.flutter.embedding.android.FlutterActivity
-import io.flutter.embedding.engine.FlutterEngine
-import io.flutter.plugin.common.MethodChannel
-import io.flutter.plugin.common.MethodChannel.Result
-import androidx.annotation.NonNull
 import android.content.Intent
 import android.content.IntentSender
 import android.content.pm.IPackageInstaller
@@ -15,119 +10,95 @@ import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.os.Process
-import rikka.shizuku.Shizuku
+import androidx.annotation.NonNull
-import rikka.shizuku.Shizuku.OnBinderDeadListener
+import com.topjohnwu.superuser.Shell
-import rikka.shizuku.Shizuku.OnBinderReceivedListener
-import rikka.shizuku.Shizuku.OnRequestPermissionResultListener
-import rikka.shizuku.ShizukuBinderWrapper
 import dev.imranr.obtainium.util.IIntentSenderAdaptor
 import dev.imranr.obtainium.util.IntentSenderUtils
 import dev.imranr.obtainium.util.PackageInstallerUtils
 import dev.imranr.obtainium.util.ShizukuSystemServerApi
+import io.flutter.embedding.android.FlutterActivity
+import io.flutter.embedding.engine.FlutterEngine
+import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugin.common.MethodChannel.Result
 import java.io.IOException
 import java.util.concurrent.CountDownLatch
-import com.topjohnwu.superuser.Shell
+import rikka.shizuku.Shizuku
+import rikka.shizuku.Shizuku.OnRequestPermissionResultListener
+import rikka.shizuku.ShizukuBinderWrapper
 
 class MainActivity: FlutterActivity() {
-    private val installersChannel = "installers"
+    private var installersChannel: MethodChannel? = null
-    private val SHIZUKU_PERMISSION_REQUEST_CODE = 839  // random num
+    private val SHIZUKU_PERMISSION_REQUEST_CODE = (10..200).random()
-    private var shizukuBinderAlive = false
-    private var shizukuPermissionGranted = false
 
-    private val shizukuBinderReceivedListener = OnBinderReceivedListener {
+    private fun shizukuCheckPermission() {
-        if(!Shizuku.isPreV11()) {  // pre 11 unsupported
+        try {
-            shizukuBinderAlive = true
+            if (Shizuku.isPreV11()) {  // Unsupported
+                installersChannel!!.invokeMethod("resPermShizuku", mapOf("res" to -1))
+            } else if (Shizuku.checkSelfPermission() == PackageManager.PERMISSION_GRANTED) {
+                installersChannel!!.invokeMethod("resPermShizuku", mapOf("res" to 1))
+            } else if (Shizuku.shouldShowRequestPermissionRationale()) {  // Deny and don't ask again
+                installersChannel!!.invokeMethod("resPermShizuku", mapOf("res" to 0))
+            } else {
+                Shizuku.requestPermission(SHIZUKU_PERMISSION_REQUEST_CODE)
+            }
+        } catch (_: Exception) {  // If shizuku not running
+            installersChannel!!.invokeMethod("resPermShizuku", mapOf("res" to -1))
         }
     }
 
-    private val shizukuBinderDeadListener = OnBinderDeadListener { shizukuBinderAlive = false }
-
     private val shizukuRequestPermissionResultListener = OnRequestPermissionResultListener {
             requestCode: Int, grantResult: Int ->
-        if(requestCode == SHIZUKU_PERMISSION_REQUEST_CODE) {
+        if (requestCode == SHIZUKU_PERMISSION_REQUEST_CODE) {
-            shizukuPermissionGranted = grantResult == PackageManager.PERMISSION_GRANTED
+            val res = if (grantResult == PackageManager.PERMISSION_GRANTED) 1 else 0
+            installersChannel!!.invokeMethod("resPermShizuku", mapOf("res" to res))
         }
     }
 
-    private fun shizukuCheckPermission() {
+    private fun shizukuInstallApk(apkFileUri: String, result: Result) {
-        if(Shizuku.isPreV11()) {
+        val uri = Uri.parse(apkFileUri)
-            shizukuPermissionGranted = false
+        var res = false
-        } else if (Shizuku.checkSelfPermission() == PackageManager.PERMISSION_GRANTED) {
-            shizukuPermissionGranted = true
-        } else if (Shizuku.shouldShowRequestPermissionRationale()) {  // Deny and don't ask again
-            shizukuPermissionGranted = false
-        } else {
-            Shizuku.requestPermission(SHIZUKU_PERMISSION_REQUEST_CODE)
-        }
-    }
-
-    private fun shizukuInstallApk(uri: Uri) {
-        val packageInstaller: PackageInstaller
         var session: PackageInstaller.Session? = null
-        val cr = contentResolver
-        val res = StringBuilder()
-        val installerPackageName: String
-        var installerAttributionTag: String? = null
-        val userId: Int
-        val isRoot: Boolean
         try {
-            val _packageInstaller: IPackageInstaller =
+            val iPackageInstaller: IPackageInstaller =
                 ShizukuSystemServerApi.PackageManager_getPackageInstaller()
-            isRoot = Shizuku.getUid() == 0
+            val isRoot = Shizuku.getUid() == 0
-
+            // The reason for use "com.android.shell" as installer package under adb
-            // the reason for use "com.android.shell" as installer package under adb is that getMySessions will check installer package's owner
+            // is that getMySessions will check installer package's owner
-            installerPackageName = if (isRoot) packageName else "com.android.shell"
+            val installerPackageName = if (isRoot) packageName else "com.android.shell"
+            var installerAttributionTag: String? = null
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
                 installerAttributionTag = attributionTag
             }
-            userId = if (isRoot) Process.myUserHandle().hashCode() else 0
+            val userId = if (isRoot) Process.myUserHandle().hashCode() else 0
-            packageInstaller = PackageInstallerUtils.createPackageInstaller(
+            val packageInstaller = PackageInstallerUtils.createPackageInstaller(
-                _packageInstaller,
+                iPackageInstaller, installerPackageName, installerAttributionTag, userId)
-                installerPackageName,
-                installerAttributionTag,
-                userId
-            )
-            val sessionId: Int
-            res.append("createSession: ")
             val params =
                 PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL)
             var installFlags: Int = PackageInstallerUtils.getInstallFlags(params)
-            installFlags =
+            installFlags = installFlags or 0x00000004  // PackageManager.INSTALL_ALLOW_TEST
-                installFlags or (0x00000004 /*PackageManager.INSTALL_ALLOW_TEST*/ or 0x00000002) /*PackageManager.INSTALL_REPLACE_EXISTING*/
             PackageInstallerUtils.setInstallFlags(params, installFlags)
-            sessionId = packageInstaller.createSession(params)
+            val sessionId = packageInstaller.createSession(params)
-            res.append(sessionId).append('\n')
+            val iSession = IPackageInstallerSession.Stub.asInterface(
-            res.append('\n').append("write: ")
+                ShizukuBinderWrapper(iPackageInstaller.openSession(sessionId).asBinder()))
-            val _session = IPackageInstallerSession.Stub.asInterface(
+            session = PackageInstallerUtils.createSession(iSession)
-                ShizukuBinderWrapper(
+            val inputStream = contentResolver.openInputStream(uri)
-                    _packageInstaller.openSession(sessionId).asBinder()
+            val openedSession = session.openWrite("apk.apk", 0, -1)
-                )
+            val buffer = ByteArray(8192)
-            )
+            var length: Int
-            session = PackageInstallerUtils.createSession(_session)
-            val name = "apk.apk"
-            val `is` = cr.openInputStream(uri)
-            val os = session.openWrite(name, 0, -1)
-            val buf = ByteArray(8192)
-            var len: Int
             try {
-                while (`is`!!.read(buf).also { len = it } > 0) {
+                while (inputStream!!.read(buffer).also { length = it } > 0) {
-                    os.write(buf, 0, len)
+                    openedSession.write(buffer, 0, length)
-                    os.flush()
+                    openedSession.flush()
-                    session.fsync(os)
+                    session.fsync(openedSession)
                 }
             } finally {
                 try {
-                    `is`!!.close()
+                    inputStream!!.close()
-                } catch (e: IOException) {
+                    openedSession.close()
-                    e.printStackTrace()
-                }
-                try {
-                    os.close()
                 } catch (e: IOException) {
                     e.printStackTrace()
                 }
             }
-            res.append('\n').append("commit: ")
             val results = arrayOf<Intent?>(null)
             val countDownLatch = CountDownLatch(1)
             val intentSender: IntentSender =
@@ -139,66 +110,62 @@ class MainActivity: FlutterActivity() {
                 })
             session.commit(intentSender)
             countDownLatch.await()
-            val result = results[0]
+            res = results[0]!!.getIntExtra(
-            val status =
+                PackageInstaller.EXTRA_STATUS, PackageInstaller.STATUS_FAILURE) == 0
-                result!!.getIntExtra(PackageInstaller.EXTRA_STATUS, PackageInstaller.STATUS_FAILURE)
+        } catch (_: Exception) {
-            val message = result.getStringExtra(PackageInstaller.EXTRA_STATUS_MESSAGE)
+            res = false
-            res.append('\n').append("status: ").append(status).append(" (").append(message)
-                .append(")")
-        } catch (tr: Throwable) {
-            tr.printStackTrace()
-            res.append(tr)
         } finally {
             if (session != null) {
                 try {
                     session.close()
-                } catch (tr: Throwable) {
+                } catch (_: Exception) {
-                    res.append(tr)
+                    res = false
                 }
             }
         }
+        result.success(res)
     }
 
-    private fun installWithShizuku(apkFilePath: String, result: Result) {
+    private fun rootCheckPermission(result: Result) {
-        shizukuCheckPermission()
+        Shell.getShell(Shell.GetShellCallback(
-        shizukuInstallApk(Uri.parse("file://$apkFilePath"))
+            fun(shell: Shell) {
-        result.success(0)
+                result.success(shell.isRoot)
-    }
-
-    private fun installWithRoot(apkFilePath: String, result: Result) {
-        Shell.sh("pm install -r -t " + apkFilePath).submit { out ->
-            val builder = StringBuilder()
-            for (data in out.getOut()) {
-                builder.append(data)
             }
-            result.success(if (builder.toString().endsWith("Success")) 0 else 1)
+        ))
+    }
+
+    private fun rootInstallApk(apkFilePath: String, result: Result) {
+        Shell.sh("pm install -R -t " + apkFilePath).submit { out ->
+            val builder = StringBuilder()
+            for (data in out.getOut()) { builder.append(data) }
+            result.success(builder.toString().endsWith("Success"))
         }
     }
 
     override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)
-        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, installersChannel).setMethodCallHandler {
+        Shizuku.addRequestPermissionResultListener(shizukuRequestPermissionResultListener)
+        installersChannel = MethodChannel(
+            flutterEngine.dartExecutor.binaryMessenger, "installers")
+        installersChannel!!.setMethodCallHandler {
             call, result ->
-            var apkFilePath: String? = call.argument("apkFilePath")
+            if (call.method == "checkPermissionShizuku") {
-            if (call.method == "installWithShizuku") {
+                shizukuCheckPermission()
-                installWithShizuku(apkFilePath.toString(), result)
+                result.success(0)
+            } else if (call.method == "checkPermissionRoot") {
+                rootCheckPermission(result)
+            } else if (call.method == "installWithShizuku") {
+                val apkFileUri: String? = call.argument("apkFileUri")
+                shizukuInstallApk(apkFileUri!!, result)
             } else if (call.method == "installWithRoot") {
-                installWithRoot(apkFilePath.toString(), result)
+                val apkFilePath: String? = call.argument("apkFilePath")
+                rootInstallApk(apkFilePath!!, result)
             }
         }
     }
 
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        Shizuku.addBinderReceivedListener(shizukuBinderReceivedListener)
-        Shizuku.addBinderDeadListener(shizukuBinderDeadListener)
-        Shizuku.addRequestPermissionResultListener(shizukuRequestPermissionResultListener)
-    }
-
     override fun onDestroy() {
         super.onDestroy()
-        Shizuku.removeBinderReceivedListener(shizukuBinderReceivedListener)
-        Shizuku.removeBinderDeadListener(shizukuBinderDeadListener)
         Shizuku.removeRequestPermissionResultListener(shizukuRequestPermissionResultListener)
     }
 }

assets/translations/en.json

@@ -282,6 +282,7 @@
     "normal": "Normal",
     "shizuku": "Shizuku",
     "root": "Root",
+    "shizukuBinderNotFound": "Shizuku is not running",
     "removeAppQuestion": {
         "one": "Remove App?",
         "other": "Remove Apps?"

assets/translations/ru.json

@@ -275,13 +275,14 @@
     "downloadingXNotifChannel": "Загрузка {}",
     "completeAppInstallationNotifChannel": "Завершение установки приложения",
     "checkingForUpdatesNotifChannel": "Проверка обновлений",
-    "onlyCheckInstalledOrTrackOnlyApps": "Only check installed and Track-Only apps for updates",
+    "onlyCheckInstalledOrTrackOnlyApps": "Проверять обновления только у установленных или отслеживаемых приложений",
-    "supportFixedAPKURL": "Support fixed APK URLs",
+    "supportFixedAPKURL": "Поддержка фиксированных URL-адресов APK",
-    "selectX": "Select {}",
+    "selectX": "Выбрать {}",
     "installMethod": "Метод установки",
     "normal": "Нормальный",
     "shizuku": "Shizuku",
     "root": "Суперпользователь",
+    "shizukuBinderNotFound": "Shizuku не запущен",
     "removeAppQuestion": {
         "one": "Удалить приложение?",
         "other": "Удалить приложения?"

lib/providers/apps_provider.dart

@@ -505,7 +505,8 @@ class AppsProvider with ChangeNotifier {
         !(await canDowngradeApps())) {
       throw DowngradeError();
     }
-    if (needsBGWorkaround) {
+    if (needsBGWorkaround &&
+        settingsProvider.installMethod == InstallMethodSettings.normal) {
       // The below 'await' will never return if we are in a background process
       // To work around this, we should assume the install will be successful
       // So we update the app's installed version first as we will never get to the later code
@@ -517,12 +518,13 @@ class AppsProvider with ChangeNotifier {
           attemptToCorrectInstallStatus: false);
     }
     int? code;
-    if (settingsProvider.installMethod == InstallMethodSettings.normal) {
+    switch (settingsProvider.installMethod) {
-      code = await AndroidPackageInstaller.installApk(apkFilePath: file.file.path);
+      case InstallMethodSettings.normal:
-    } else if (settingsProvider.installMethod == InstallMethodSettings.shizuku) {
+        code = await AndroidPackageInstaller.installApk(apkFilePath: file.file.path);
-      code = await Installers.installWithShizuku(apkFilePath: file.file.path);
+      case InstallMethodSettings.shizuku:
-    } else if (settingsProvider.installMethod == InstallMethodSettings.root) {
+        code = (await Installers.installWithShizuku(apkFileUri: file.file.uri.toString())) ? 0 : 1;
-      code = await Installers.installWithRoot(apkFilePath: file.file.path);
+      case InstallMethodSettings.root:
+        code = (await Installers.installWithRoot(apkFilePath: file.file.path)) ? 0 : 1;
     }
     bool installed = false;
     if (code != null && code != 0 && code != 3) {
@@ -679,8 +681,22 @@ class AppsProvider with ChangeNotifier {
         }
         var appId = downloadedFile?.appId ?? downloadedDir!.appId;
         bool willBeSilent = await canInstallSilently(apps[appId]!.app);
-        if (!(await settingsProvider.getInstallPermission(enforce: false))) {
+        switch (settingsProvider.installMethod) {
-          throw ObtainiumError(tr('cancelled'));
+          case InstallMethodSettings.normal:
+            if (!(await settingsProvider.getInstallPermission(enforce: false))) {
+              throw ObtainiumError(tr('cancelled'));
+            }
+          case InstallMethodSettings.shizuku:
+            int code = await Installers.checkPermissionShizuku();
+            if (code == -1) {
+              throw ObtainiumError(tr('shizukuBinderNotFound'));
+            } else if (code == 0) {
+              throw ObtainiumError(tr('cancelled'));
+            }
+          case InstallMethodSettings.root:
+            if (!(await Installers.checkPermissionRoot())) {
+              throw ObtainiumError(tr('cancelled'));
+            }
         }
         if (!willBeSilent && context != null) {
           // ignore: use_build_context_synchronously

lib/providers/installers_provider.dart

@@ -3,12 +3,52 @@ import 'package:flutter/services.dart';
 
 class Installers {
   static const MethodChannel _channel = MethodChannel('installers');
+  static bool _callbacksApplied = false;
+  static int _resPermShizuku = -2;  // not set
 
-  static Future<int?> installWithShizuku({required String apkFilePath}) async {
+  static Future waitWhile(bool Function() test,
-    return await _channel.invokeMethod('installWithShizuku', {'apkFilePath': apkFilePath});
+      [Duration pollInterval = const Duration(milliseconds: 100)]) {
+    var completer = Completer();
+    check() {
+      if (test()) {
+        Timer(pollInterval, check);
+      } else {
+        completer.complete();
+      }
+    }
+    check();
+    return completer.future;
   }
 
-  static Future<int?> installWithRoot({required String apkFilePath}) async {
+  static Future handleCalls(MethodCall call) async {
-    return await _channel.invokeMethod('installWithRoot', {'apkFilePath': apkFilePath});
+    if (call.method == 'resPermShizuku') {
+      _resPermShizuku = call.arguments['res'];
+    }
+  }
+
+  static Future<int> checkPermissionShizuku() async {
+    if (!_callbacksApplied) {
+      _channel.setMethodCallHandler(handleCalls);
+      _callbacksApplied = true;
+    }
+    await _channel.invokeMethod('checkPermissionShizuku');
+    await waitWhile(() => _resPermShizuku == -2);
+    int res = _resPermShizuku;
+    _resPermShizuku = -2;
+    return res;
+  }
+
+  static Future<bool> checkPermissionRoot() async {
+    return await _channel.invokeMethod('checkPermissionRoot');
+  }
+
+  static Future<bool> installWithShizuku({required String apkFileUri}) async {
+    return await _channel.invokeMethod(
+        'installWithShizuku', {'apkFileUri': apkFileUri});
+  }
+
+  static Future<bool> installWithRoot({required String apkFilePath}) async {
+    return await _channel.invokeMethod(
+        'installWithRoot', {'apkFilePath': apkFilePath});
   }
 }