UPDATE: Minor tweaks

app/build.gradle

@@ -43,6 +43,8 @@ dependencies {
     implementation project(':biometric')
 
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutine_version"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$kotlin_coroutine_version"
     implementation 'androidx.lifecycle:lifecycle-common-java8:2.0.0'
     implementation 'androidx.lifecycle:lifecycle-viewmodel:2.0.0'
     implementation 'androidx.appcompat:appcompat:1.0.2'

app/src/main/res/values-zh/strings.xml

@@ -65,7 +65,7 @@
     <string name="action_freeze">冻结</string>
     <string name="action_unfreeze">解除冻结</string>
     <string name="action_shortcut">创建“解冻并启动”快捷方式</string>
-    <string name="action_greenify">委托绿色守护自动冻结</string>
+    <string name="action_greenify">委托“绿色守护”自动冻结</string>
     <string name="action_app_settings">应用设置</string>
     <string name="action_remove">移除分身</string>
     <string name="action_uninstall">卸载</string>
@@ -144,8 +144,8 @@
     <string name="pref_launch_shortcut_prefix_title">应用启动快捷方式的名称前缀</string>
     <string name="pref_show_admin_message_title">在操作限制界面中显示提示信息</string>
     <string name="pref_show_admin_message_summary">在系统弹出的“不允许执行此操作”对话框中显示针对性的提示信息。</string>
-    <string name="pref_preserve_app_ops">为解冻的应用恢复 App-Ops</string>
-    <string name="pref_preserve_app_ops_description">Android 系统不会为冻结的应用保留已设置的 App-Ops（权限限制，例如“后台限制”、“显示在其它应用的上层”），炼妖壶可以为其提供恢复。</string>
+    <string name="pref_preserve_app_ops">为解冻的应用恢复 App Ops</string>
+    <string name="pref_preserve_app_ops_description">Android 系统不会为冻结的应用保留已设置的 App Ops（权限限制，例如“后台限制”、“显示在其它应用的上层”），炼妖壶可以为其提供恢复。</string>
     <string name="pref_preserve_app_ops_adb_footnote">\n\n（需要执行 ADB 指令，仅在首次开启时）</string>
     <string name="prompt_adb_app_ops_command">请在 ADB 命令行执行以下指令：\n\n</string>
     <string name="action_copy">复制至剪贴板</string>

app/src/main/res/values/strings.xml

@@ -144,7 +144,7 @@ the sandbox environment. Island never collect data related to your privacy, plea
 
     <string name="pref_general_header">General</string>
     <string name="pref_launch_shortcut_prefix_title">Launch shortcut prefix</string>
-    <string name="pref_show_admin_message_title">Extra info in "Action not allowed" dialog</string>
+    <string name="pref_show_admin_message_title">Extra info in \"Action not allowed\" dialog</string>
     <string name="pref_show_admin_message_summary">Show Island-specific extra information in the \"Action not allowed\" system dialog.</string>
     <string name="pref_preserve_app_ops">Preserve App-Ops for frozen apps</string>
     <string name="pref_preserve_app_ops_description">Android system does not preserve the App-Ops (permission override) settings (e.g. \"background restriction\", \"show above other apps\") for frozen apps, let Island do that for you.</string>

build.gradle

@@ -2,13 +2,14 @@
 
 buildscript {
     ext.kotlin_version = '1.3.40'
+    ext.kotlin_coroutine_version = '1.3.0-M2'
     repositories {
         google()
         jcenter()
         maven { url 'https://maven.fabric.io/public' }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0-beta05'
+        classpath 'com.android.tools.build:gradle:3.5.0-rc01'
         classpath 'com.google.gms:google-services:4.2.0'
         classpath 'io.fabric.tools:gradle:1.26.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

engine/build.gradle

@@ -28,10 +28,10 @@ android {
 dependencies {
     implementation project(':shared')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.0-M1'
-    implementation 'androidx.core:core:1.0.1'      // ShortcutShuttle
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutine_version"
+    implementation 'androidx.core:core:1.0.2'      // ShortcutShuttle
     implementation "androidx.core:core-ktx:1.0.2"
 
-    androidTestImplementation 'androidx.test:runner:1.1.1'
-    androidTestImplementation 'androidx.test:rules:1.1.1'
+    androidTestImplementation 'androidx.test:runner:1.2.0'
+    androidTestImplementation 'androidx.test:rules:1.2.0'
 }

installer/src/main/java/com/oasisfeng/island/installer/AppInstallerActivity.java

@@ -30,6 +30,7 @@
 import android.util.Log;
 import android.util.Pair;
 import android.view.View;
+import android.view.WindowManager;
 import android.widget.CheckBox;
 import android.widget.Toast;
 
@@ -276,7 +277,9 @@ private void performInstall(final Uri uri, final CharSequence app_description, f
 
 		final String progress_text = getString(mUpdateOrInstall == null ? R.string.progress_dialog_cloning : mUpdateOrInstall
 				? R.string.progress_dialog_updating : R.string.progress_dialog_installing, mCallerAppLabel.get(), app_description);
-		mProgressDialog = Dialogs.buildProgress(this, progress_text).indeterminate().nonCancelable().start();
+		try {
+			mProgressDialog = Dialogs.buildProgress(this, progress_text).indeterminate().nonCancelable().start();
+		} catch (final WindowManager.BadTokenException ignored) {}		// Activity may no longer visible.
 	}
 
 	private void fallbackToSystemPackageInstaller(final String reason, final @Nullable Exception e) {

shared/src/main/java/com/oasisfeng/island/appops/AppOpsHelper.java

@@ -6,6 +6,7 @@
 import android.util.Log;
 
 import com.oasisfeng.island.util.Hacks;
+import com.oasisfeng.island.util.OwnerUser;
 import com.oasisfeng.island.util.ProfileUser;
 
 import java.util.Arrays;
@@ -25,19 +26,20 @@
 
 	private static final String PREFS_NAME = "app_ops";
 
-	/** @return whether anything is saved. False will be returned for failure */
-	@ProfileUser @RequiresPermission(GET_APP_OPS_STATS)
-	public static boolean saveAppOps(final Context context, final String pkg) throws PackageManager.NameNotFoundException {
-		final List<Hacks.AppOpsManager.PackageOps> list = new AppOpsCompat(context)
-				.getOpsForPackage(context.getPackageManager().getPackageUid(pkg, MATCH_DISABLED_COMPONENTS), pkg, null);
-		final SharedPreferences.Editor store = getDeviceProtectedSharedPreferences(context).edit();
+	@OwnerUser @ProfileUser @RequiresPermission(GET_APP_OPS_STATS)
+	public static void saveAppOps(final Context context, final String pkg) throws PackageManager.NameNotFoundException {
+		final SharedPreferences store = getDeviceProtectedSharedPreferences(context);	// As early as possible since the async loading takes time.
+
+		final int uid = context.getPackageManager().getPackageUid(pkg, MATCH_DISABLED_COMPONENTS);
+		final List<Hacks.AppOpsManager.PackageOps> list = new AppOpsCompat(context).getOpsForPackage(uid, pkg, null);
 		final String flat_pkg_ops = list == null || list.isEmpty() ? null : list.stream().filter(ops -> pkg.equals(ops.getPackageName()))
-				.flatMap(ops -> ops.getOps().stream()).filter(entry -> ! isDefaultMode(entry.getOp(), entry.getMode())).map(entry -> entry.getOp() + ":" + entry.getMode())
-				.collect(Collectors.joining(","));
-		if (flat_pkg_ops == null || flat_pkg_ops.isEmpty()) store.remove(pkg).apply();
-		else store.putString(pkg, flat_pkg_ops).apply();
-		Log.d(TAG, "App ops saved for " + pkg + ": " + flat_pkg_ops);
-		return true;
+				.flatMap(ops -> ops.getOps().stream()).filter(entry -> ! isDefaultMode(entry.getOp(), entry.getMode()))
+				.map(entry -> entry.getOp() + ":" + entry.getMode()).collect(Collectors.joining(","));
+
+		if (flat_pkg_ops != null && ! flat_pkg_ops.isEmpty()) {
+			store.edit().putString(pkg, flat_pkg_ops).apply();
+			Log.d(TAG, "App-ops saved for " + pkg + ": " + flat_pkg_ops);
+		} else store.edit().remove(pkg).apply();
 	}
 
 	private static boolean isDefaultMode(final int op, final int mode) { // DO NOT pass in OpEntry as parameter, which causes disaster after R8. (as of AS 3.5 Beta 5)
@@ -54,8 +56,8 @@ private static boolean isDefaultMode(final int op, final int mode) { // DO NOT p
 			final int mode = Integer.parseInt(splits[1].substring(0, 1));
 			app_ops.setMode(op, uid, pkg, mode);
 		});
-		Log.d(TAG, "App ops restored for " + pkg + ": " + pkg_ops);
-		return false;
+		Log.d(TAG, "App-ops restored for " + pkg + ": " + pkg_ops);
+		return true;
 	}
 
 	private static SharedPreferences getDeviceProtectedSharedPreferences(final Context context) {