Merge remote-tracking branch 'origin/main' into dev

android/app/build.gradle

@@ -23,6 +23,7 @@ if (flutterVersionName == null) {
 
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
+apply plugin: 'dev.rikka.tools.refine'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 def keystoreProperties = new Properties()
@@ -32,7 +33,7 @@ if (keystorePropertiesFile.exists()) {
 }
 
 android {
-    compileSdkVersion 33
+    compileSdkVersion 34
     ndkVersion flutter.ndkVersion
 
     compileOptions {
@@ -52,8 +53,8 @@ android {
         applicationId "dev.imranr.obtainium"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
-        minSdkVersion 23
+        minSdkVersion 24
-        targetSdkVersion 33
+        targetSdkVersion 34
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }
@@ -90,6 +91,24 @@ flutter {
     source '../..'
 }
 
+repositories {
+    maven { url 'https://jitpack.io' }
+}
+
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+
+    def shizuku_version = '13.1.5'
+    implementation "dev.rikka.shizuku:api:$shizuku_version"
+    implementation "dev.rikka.shizuku:provider:$shizuku_version"
+
+    def hidden_api_version = '4.1.0'
+    // DO NOT UPDATE Hidden API without updating the Android tools
+    // and do not update Android tools without updating the whole Flutter
+    // (also in android/build.gradle)
+    implementation "dev.rikka.tools.refine:runtime:$hidden_api_version"
+    implementation "dev.rikka.hidden:compat:$hidden_api_version"
+    compileOnly "dev.rikka.hidden:stub:$hidden_api_version"
+
+    implementation "com.github.topjohnwu.libsu:core:5.2.2"
 }

android/app/src/main/AndroidManifest.xml

@@ -66,6 +66,13 @@
                 android:name="android.support.FILE_PROVIDER_PATHS"
                 android:resource="@xml/file_paths" />
         </provider>
+        <provider
+            android:name="rikka.shizuku.ShizukuProvider"
+            android:authorities="${applicationId}.shizuku"
+            android:multiprocess="false"
+            android:enabled="true"
+            android:exported="true"
+            android:permission="android.permission.INTERACT_ACROSS_USERS_FULL" />
     </application>
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />

android/app/src/main/kotlin/com/example/obtainium/MainActivity.kt

@@ -1,6 +0,0 @@
-package dev.imranr.obtainium
-
-import io.flutter.embedding.android.FlutterActivity
-
-class MainActivity: FlutterActivity() {
-}

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

@@ -0,0 +1,171 @@
+package dev.imranr.obtainium
+
+import android.content.Intent
+import android.content.IntentSender
+import android.content.pm.IPackageInstaller
+import android.content.pm.IPackageInstallerSession
+import android.content.pm.PackageInstaller
+import android.content.pm.PackageManager
+import android.net.Uri
+import android.os.Build
+import android.os.Bundle
+import android.os.Process
+import androidx.annotation.NonNull
+import com.topjohnwu.superuser.Shell
+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 rikka.shizuku.Shizuku
+import rikka.shizuku.Shizuku.OnRequestPermissionResultListener
+import rikka.shizuku.ShizukuBinderWrapper
+
+class MainActivity: FlutterActivity() {
+    private var installersChannel: MethodChannel? = null
+    private val SHIZUKU_PERMISSION_REQUEST_CODE = (10..200).random()
+
+    private fun shizukuCheckPermission(result: Result) {
+        try {
+            if (Shizuku.isPreV11()) {  // Unsupported
+                result.success(-1)
+            } else if (Shizuku.checkSelfPermission() == PackageManager.PERMISSION_GRANTED) {
+                result.success(1)
+            } else if (Shizuku.shouldShowRequestPermissionRationale()) {  // Deny and don't ask again
+                result.success(0)
+            } else {
+                Shizuku.requestPermission(SHIZUKU_PERMISSION_REQUEST_CODE)
+                result.success(-2)
+            }
+        } catch (_: Exception) {  // If shizuku not running
+            result.success(-1)
+        }
+    }
+
+    private val shizukuRequestPermissionResultListener = OnRequestPermissionResultListener {
+            requestCode: Int, grantResult: Int ->
+        if (requestCode == SHIZUKU_PERMISSION_REQUEST_CODE) {
+            val res = if (grantResult == PackageManager.PERMISSION_GRANTED) 1 else 0
+            installersChannel!!.invokeMethod("resPermShizuku", mapOf("res" to res))
+        }
+    }
+
+    private fun shizukuInstallApk(apkFileUri: String, result: Result) {
+        val uri = Uri.parse(apkFileUri)
+        var res = false
+        var session: PackageInstaller.Session? = null
+        try {
+            val iPackageInstaller: IPackageInstaller =
+                ShizukuSystemServerApi.PackageManager_getPackageInstaller()
+            val isRoot = Shizuku.getUid() == 0
+            // The reason for use "com.android.shell" as installer package under adb
+            // is that getMySessions will check installer package's owner
+            val installerPackageName = if (isRoot) packageName else "com.android.shell"
+            var installerAttributionTag: String? = null
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+                installerAttributionTag = attributionTag
+            }
+            val userId = if (isRoot) Process.myUserHandle().hashCode() else 0
+            val packageInstaller = PackageInstallerUtils.createPackageInstaller(
+                iPackageInstaller, installerPackageName, installerAttributionTag, userId)
+            val params =
+                PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL)
+            var installFlags: Int = PackageInstallerUtils.getInstallFlags(params)
+            installFlags = installFlags or 0x00000004  // PackageManager.INSTALL_ALLOW_TEST
+            PackageInstallerUtils.setInstallFlags(params, installFlags)
+            val sessionId = packageInstaller.createSession(params)
+            val iSession = IPackageInstallerSession.Stub.asInterface(
+                ShizukuBinderWrapper(iPackageInstaller.openSession(sessionId).asBinder()))
+            session = PackageInstallerUtils.createSession(iSession)
+            val inputStream = contentResolver.openInputStream(uri)
+            val openedSession = session.openWrite("apk.apk", 0, -1)
+            val buffer = ByteArray(8192)
+            var length: Int
+            try {
+                while (inputStream!!.read(buffer).also { length = it } > 0) {
+                    openedSession.write(buffer, 0, length)
+                    openedSession.flush()
+                    session.fsync(openedSession)
+                }
+            } finally {
+                try {
+                    inputStream!!.close()
+                    openedSession.close()
+                } catch (e: IOException) {
+                    e.printStackTrace()
+                }
+            }
+            val results = arrayOf<Intent?>(null)
+            val countDownLatch = CountDownLatch(1)
+            val intentSender: IntentSender =
+                IntentSenderUtils.newInstance(object : IIntentSenderAdaptor() {
+                    override fun send(intent: Intent?) {
+                        results[0] = intent
+                        countDownLatch.countDown()
+                    }
+                })
+            session.commit(intentSender)
+            countDownLatch.await()
+            res = results[0]!!.getIntExtra(
+                PackageInstaller.EXTRA_STATUS, PackageInstaller.STATUS_FAILURE) == 0
+        } catch (_: Exception) {
+            res = false
+        } finally {
+            if (session != null) {
+                try {
+                    session.close()
+                } catch (_: Exception) {
+                    res = false
+                }
+            }
+        }
+        result.success(res)
+    }
+
+    private fun rootCheckPermission(result: Result) {
+        Shell.getShell(Shell.GetShellCallback(
+            fun(shell: Shell) {
+                result.success(shell.isRoot)
+            }
+        ))
+    }
+
+    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)
+        Shizuku.addRequestPermissionResultListener(shizukuRequestPermissionResultListener)
+        installersChannel = MethodChannel(
+            flutterEngine.dartExecutor.binaryMessenger, "installers")
+        installersChannel!!.setMethodCallHandler {
+            call, result ->
+            if (call.method == "checkPermissionShizuku") {
+                shizukuCheckPermission(result)
+            } 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") {
+                val apkFilePath: String? = call.argument("apkFilePath")
+                rootInstallApk(apkFilePath!!, result)
+            }
+        }
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        Shizuku.removeRequestPermissionResultListener(shizukuRequestPermissionResultListener)
+    }
+}

android/app/src/main/kotlin/dev/imranr/obtainium/util/ApplicationUtils.java

@@ -0,0 +1,37 @@
+package dev.imranr.obtainium.util;
+
+import android.annotation.SuppressLint;
+import android.app.Application;
+import android.os.Build;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class ApplicationUtils {
+
+    private static Application application;
+
+    public static Application getApplication() {
+        return application;
+    }
+
+    public static void setApplication(Application application) {
+        ApplicationUtils.application = application;
+    }
+
+    public static String getProcessName() {
+        if (Build.VERSION.SDK_INT >= 28)
+            return Application.getProcessName();
+        else {
+            try {
+                @SuppressLint("PrivateApi")
+                Class<?> activityThread = Class.forName("android.app.ActivityThread");
+                @SuppressLint("DiscouragedPrivateApi")
+                Method method = activityThread.getDeclaredMethod("currentProcessName");
+                return (String) method.invoke(null);
+            } catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+}

android/app/src/main/kotlin/dev/imranr/obtainium/util/IIntentSenderAdaptor.java

@@ -0,0 +1,23 @@
+package dev.imranr.obtainium.util;
+
+import android.content.IIntentReceiver;
+import android.content.IIntentSender;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.IBinder;
+
+public abstract class IIntentSenderAdaptor extends IIntentSender.Stub {
+
+    public abstract void send(Intent intent);
+
+    @Override
+    public int send(int code, Intent intent, String resolvedType, IIntentReceiver finishedReceiver, String requiredPermission, Bundle options) {
+        send(intent);
+        return 0;
+    }
+
+    @Override
+    public void send(int code, Intent intent, String resolvedType, IBinder whitelistToken, IIntentReceiver finishedReceiver, String requiredPermission, Bundle options) {
+        send(intent);
+    }
+}

android/app/src/main/kotlin/dev/imranr/obtainium/util/IntentSenderUtils.java

@@ -0,0 +1,14 @@
+package dev.imranr.obtainium.util;
+
+import android.content.IIntentSender;
+import android.content.IntentSender;
+
+import java.lang.reflect.InvocationTargetException;
+
+public class IntentSenderUtils {
+
+    public static IntentSender newInstance(IIntentSender binder) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
+        //noinspection JavaReflectionMemberAccess
+        return IntentSender.class.getConstructor(IIntentSender.class).newInstance(binder);
+    }
+}

android/app/src/main/kotlin/dev/imranr/obtainium/util/PackageInstallerUtils.java

@@ -0,0 +1,41 @@
+package dev.imranr.obtainium.util;
+
+import android.content.Context;
+import android.content.pm.IPackageInstaller;
+import android.content.pm.IPackageInstallerSession;
+import android.content.pm.PackageInstaller;
+import android.content.pm.PackageManager;
+import android.os.Build;
+
+import java.lang.reflect.InvocationTargetException;
+
+@SuppressWarnings({"JavaReflectionMemberAccess"})
+public class PackageInstallerUtils {
+
+    public static PackageInstaller createPackageInstaller(IPackageInstaller installer, String installerPackageName, String installerAttributionTag, int userId) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            return PackageInstaller.class.getConstructor(IPackageInstaller.class, String.class, String.class, int.class)
+                    .newInstance(installer, installerPackageName, installerAttributionTag, userId);
+        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            return PackageInstaller.class.getConstructor(IPackageInstaller.class, String.class, int.class)
+                    .newInstance(installer, installerPackageName, userId);
+        } else {
+            return PackageInstaller.class.getConstructor(Context.class, PackageManager.class, IPackageInstaller.class, String.class, int.class)
+                    .newInstance(ApplicationUtils.getApplication(), ApplicationUtils.getApplication().getPackageManager(), installer, installerPackageName, userId);
+        }
+    }
+
+    public static PackageInstaller.Session createSession(IPackageInstallerSession session) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
+        return PackageInstaller.Session.class.getConstructor(IPackageInstallerSession.class)
+                .newInstance(session);
+
+    }
+
+    public static int getInstallFlags(PackageInstaller.SessionParams params) throws NoSuchFieldException, IllegalAccessException {
+        return (int) PackageInstaller.SessionParams.class.getDeclaredField("installFlags").get(params);
+    }
+
+    public static void setInstallFlags(PackageInstaller.SessionParams params, int newValue) throws NoSuchFieldException, IllegalAccessException {
+        PackageInstaller.SessionParams.class.getDeclaredField("installFlags").set(params, newValue);
+    }
+}

android/app/src/main/kotlin/dev/imranr/obtainium/util/ShizukuSystemServerApi.java

@@ -0,0 +1,68 @@
+package dev.imranr.obtainium.util;
+
+import android.content.Context;
+import android.content.pm.IPackageInstaller;
+import android.content.pm.IPackageManager;
+import android.content.pm.UserInfo;
+import android.os.Build;
+import android.os.IUserManager;
+import android.os.RemoteException;
+
+import java.util.List;
+
+import rikka.shizuku.ShizukuBinderWrapper;
+import rikka.shizuku.SystemServiceHelper;
+
+public class ShizukuSystemServerApi {
+
+    private static final Singleton<IPackageManager> PACKAGE_MANAGER = new Singleton<IPackageManager>() {
+        @Override
+        protected IPackageManager create() {
+            return IPackageManager.Stub.asInterface(new ShizukuBinderWrapper(SystemServiceHelper.getSystemService("package")));
+        }
+    };
+
+    private static final Singleton<IUserManager> USER_MANAGER = new Singleton<IUserManager>() {
+        @Override
+        protected IUserManager create() {
+            return IUserManager.Stub.asInterface(new ShizukuBinderWrapper(SystemServiceHelper.getSystemService(Context.USER_SERVICE)));
+        }
+    };
+
+    public static IPackageInstaller PackageManager_getPackageInstaller() throws RemoteException {
+        IPackageInstaller packageInstaller = PACKAGE_MANAGER.get().getPackageInstaller();
+        return IPackageInstaller.Stub.asInterface(new ShizukuBinderWrapper(packageInstaller.asBinder()));
+    }
+
+    public static List<UserInfo> UserManager_getUsers(boolean excludePartial, boolean excludeDying, boolean excludePreCreated) throws RemoteException {
+        if (Build.VERSION.SDK_INT >= 30) {
+            return USER_MANAGER.get().getUsers(excludePartial, excludeDying, excludePreCreated);
+        } else {
+            try {
+                return USER_MANAGER.get().getUsers(excludeDying);
+            } catch (NoSuchFieldError e) {
+                return USER_MANAGER.get().getUsers(excludePartial, excludeDying, excludePreCreated);
+            }
+        }
+    }
+
+    // method 2: use transactRemote directly
+    /*public static List<UserInfo> UserManager_getUsers(boolean excludeDying) {
+        Parcel data = SystemServiceHelper.obtainParcel(Context.USER_SERVICE, "android.os.IUserManager", "getUsers");
+        Parcel reply = Parcel.obtain();
+        data.writeInt(excludeDying ? 1 : 0);
+
+        List<UserInfo> res = null;
+        try {
+            ShizukuService.transactRemote(data, reply, 0);
+            reply.readException();
+            res = reply.createTypedArrayList(UserInfo.CREATOR);
+        } catch (RemoteException e) {
+            Log.e("ShizukuSample", "UserManager#getUsers", e);
+        } finally {
+            data.recycle();
+            reply.recycle();
+        }
+        return res;
+    }*/
+}

android/app/src/main/kotlin/dev/imranr/obtainium/util/Singleton.java

@@ -0,0 +1,17 @@
+package dev.imranr.obtainium.util;
+
+public abstract class Singleton<T> {
+
+    private T mInstance;
+
+    protected abstract T create();
+
+    public final T get() {
+        synchronized (this) {
+            if (mInstance == null) {
+                mInstance = create();
+            }
+            return mInstance;
+        }
+    }
+}

android/build.gradle

@@ -8,6 +8,7 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:7.2.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath 'dev.rikka.tools.refine:gradle-plugin:4.1.0'  // Do not update!
     }
 }
 

assets/translations/en.json

@@ -281,6 +281,11 @@
     "supportFixedAPKURL": "Support fixed APK URLs",
     "selectX": "Select {}",
     "parallelDownloads": "Allow parallel downloads",
+    "installMethod": "Installation method",
+    "normal": "Normal",
+    "shizuku": "Shizuku",
+    "root": "Root",
+    "shizukuBinderNotFound": "Shizuku is not running",
     "removeAppQuestion": {
         "one": "Remove App?",
         "other": "Remove Apps?"

assets/translations/ru.json

@@ -277,10 +277,15 @@
     "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 {}",
-    "parallelDownloads": "Allow parallel downloads",
+    "parallelDownloads": "Разрешить параллельные загрузки",
+    "installMethod": "Метод установки",
+    "normal": "Нормальный",
+    "shizuku": "Shizuku",
+    "root": "Суперпользователь",
+    "shizukuBinderNotFound": "Shizuku не запущен",
     "removeAppQuestion": {
         "one": "Удалить приложение?",
         "other": "Удалить приложения?"

lib/pages/settings.dart

@@ -30,6 +30,29 @@ class _SettingsPageState extends State<SettingsPage> {
       settingsProvider.initializeSettings();
     }
 
+    var installMethodDropdown = DropdownButtonFormField(
+        decoration: InputDecoration(labelText: tr('installMethod')),
+        value: settingsProvider.installMethod,
+        items: [
+          DropdownMenuItem(
+            value: InstallMethodSettings.normal,
+            child: Text(tr('normal')),
+          ),
+          DropdownMenuItem(
+            value: InstallMethodSettings.shizuku,
+            child: Text(tr('shizuku')),
+          ),
+          DropdownMenuItem(
+            value: InstallMethodSettings.root,
+            child: Text(tr('root')),
+          )
+        ],
+        onChanged: (value) {
+          if (value != null) {
+            settingsProvider.installMethod = value;
+          }
+        });
+
     var themeDropdown = DropdownButtonFormField(
         decoration: InputDecoration(labelText: tr('theme')),
         value: settingsProvider.theme,
@@ -328,6 +351,8 @@ class _SettingsPageState extends State<SettingsPage> {
                               ],
                             ),
                             height16,
+                            installMethodDropdown,
+                            height16,
                             Row(
                               mainAxisAlignment: MainAxisAlignment.spaceBetween,
                               children: [

lib/providers/apps_provider.dart

@@ -33,6 +33,7 @@ import 'package:http/http.dart';
 import 'package:android_intent_plus/android_intent.dart';
 import 'package:flutter_archive/flutter_archive.dart';
 import 'package:shared_storage/shared_storage.dart' as saf;
+import 'installers_provider.dart';
 
 final pm = AndroidPackageManager();
 
@@ -504,7 +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
@@ -515,8 +517,15 @@ class AppsProvider with ChangeNotifier {
       await saveApps([apps[file.appId]!.app],
           attemptToCorrectInstallStatus: false);
     }
-    int? code =
+    int? code;
-        await AndroidPackageInstaller.installApk(apkFilePath: file.file.path);
+    switch (settingsProvider.installMethod) {
+      case InstallMethodSettings.normal:
+        code = await AndroidPackageInstaller.installApk(apkFilePath: file.file.path);
+      case InstallMethodSettings.shizuku:
+        code = (await Installers.installWithShizuku(apkFileUri: file.file.uri.toString())) ? 0 : 1;
+      case InstallMethodSettings.root:
+        code = (await Installers.installWithRoot(apkFilePath: file.file.path)) ? 0 : 1;
+    }
     bool installed = false;
     if (code != null && code != 0 && code != 3) {
       throw InstallError(code);
@@ -672,9 +681,23 @@ class AppsProvider with ChangeNotifier {
         }
         var appId = downloadedFile?.appId ?? downloadedDir!.appId;
         bool willBeSilent = await canInstallSilently(apps[appId]!.app);
+        switch (settingsProvider.installMethod) {
+          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
           await waitForUserToReturnToForeground(context);

lib/providers/installers_provider.dart

@@ -0,0 +1,56 @@
+import 'dart:async';
+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 waitWhile(bool Function() test,
+      [Duration pollInterval = const Duration(milliseconds: 250)]) {
+    var completer = Completer();
+    check() {
+      if (test()) {
+        Timer(pollInterval, check);
+      } else {
+        completer.complete();
+      }
+    }
+    check();
+    return completer.future;
+  }
+
+  static Future handleCalls(MethodCall call) async {
+    if (call.method == 'resPermShizuku') {
+      _resPermShizuku = call.arguments['res'];
+    }
+  }
+
+  static Future<int> checkPermissionShizuku() async {
+    if (!_callbacksApplied) {
+      _channel.setMethodCallHandler(handleCalls);
+      _callbacksApplied = true;
+    }
+    int res = await _channel.invokeMethod('checkPermissionShizuku');
+    if(res == -2) {
+      await waitWhile(() => _resPermShizuku == -2);
+      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});
+  }
+}

lib/providers/settings_provider.dart

@@ -17,6 +17,8 @@ import 'package:shared_storage/shared_storage.dart' as saf;
 String obtainiumTempId = 'imranr98_obtainium_${GitHub().host}';
 String obtainiumId = 'dev.imranr.obtainium';
 
+enum InstallMethodSettings { normal, shizuku, root }
+
 enum ThemeSettings { system, light, dark }
 
 enum ColourSettings { basic, materialYou }
@@ -49,6 +51,16 @@ class SettingsProvider with ChangeNotifier {
     notifyListeners();
   }
 
+  InstallMethodSettings get installMethod {
+    return InstallMethodSettings
+        .values[prefs?.getInt('installMethod') ?? InstallMethodSettings.normal.index];
+  }
+
+  set installMethod(InstallMethodSettings t) {
+    prefs?.setInt('installMethod', t.index);
+    notifyListeners();
+  }
+
   ThemeSettings get theme {
     return ThemeSettings
         .values[prefs?.getInt('theme') ?? ThemeSettings.system.index];