First release

.gitignore

@@ -0,0 +1,46 @@
+# Gradle files
+.gradle/
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Log/OS Files
+*.log
+
+# Android Studio generated files and folders
+captures/
+.externalNativeBuild/
+.cxx/
+*.apk
+output.json
+release/
+
+# IntelliJ
+*.iml
+.idea/
+misc.xml
+deploymentTargetDropDown.xml
+render.experimental.xml
+
+# Keystore files
+*.jks
+*.keystore
+
+# Google Services (e.g. APIs or Firebase)
+google-services.json
+
+# Android Profiling
+*.hprof
+
+# Common credential files
+**/credentials.json
+**/client_secrets.json
+**/client_secret.json
+*creds*
+*.dat
+*password*
+*.httr-oauth*
+
+# Mac/OSX
+.DS_Store

README.md

@@ -0,0 +1,34 @@
+<table>
+  <tr>
+    <td width="200" style="border: none;">
+     <img src="app/src/main/res/mipmap-xxxhdpi/ic_launcher.png" alt="Module icon"/>
+    </td>
+    <td style="border: none;">
+     <h2>Cast Enabler</h2>
+    </td>
+  </tr>
+</table>
+
+## About this
+Simple module to enable cast volume control with the rocker or in the input switcher when disabled by the manufacturer.
+
+The purpose of the app is to only enable cast volume control when this was mistakenly disabled by the manufacturer and by no mean was meant to break any law.
+
+Find the latest release [here](https://github.com/Massi-X/castenabler/releases/latest).
+
+## Development
+Pull the main repo, make the appropriate changes, then compile it using [Android Studio](https://developer.android.com/studio). Should work out of the box.
+
+## Donation
+If you like to support me, you can donate. Any help is greatly appreciated. Thank you!
+
+<a target="_blank" href="https://paypal.me/firemetris"><img src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" alt="paypal"/></a>
+
+**Bitcoin:** 1Pig6XJxXGBj1v3r6uLrFUSHwyX8GPopRs
+
+**Monero:** 89qdmpDsMm9MUvpsG69hbRMcGWeG2D26BdATw1iXXZwi8DqSEstJGcWNkenrXtThCAAJTpjkUNtZuQvxK1N5xSyb18eXzPD
+
+## License
+`SPDX-License-Identifier: AGPL-3.0`<br>
+This work is licensed under <a target="_blank" href="https://spdx.org/licenses/AGPL-3.0.html">GNU Affero General Public License v3.0</a><br>
+By using this project you agree to the terms.

app/build.gradle

@@ -0,0 +1,31 @@
+plugins {
+    id 'com.android.application'
+}
+
+android {
+    compileSdk 31
+
+    defaultConfig {
+        applicationId "com.metris.xposed.castenabler"
+        minSdk 31
+        targetSdk 31
+        versionCode 1
+        versionName "1.0"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+dependencies {
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    compileOnly 'de.robv.android.xposed:api:82'
+}

app/proguard-rules.pro

@@ -0,0 +1,24 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
+-keep,allowobfuscation class com.metris.xposed.castenabler.XHooks
+-keepnames class com.metris.xposed.castenabler.XHooks
+-keepattributes EnclosingMethod

app/src/main/AndroidManifest.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.metris.xposed.castenabler">
+
+    <!-- Don't declare any permission to let the app be hidden -->
+
+    <application
+        android:label="@string/app_name"
+        android:icon="@mipmap/ic_launcher"
+        android:roundIcon="@mipmap/ic_launcher"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.CastEnabler">
+        <activity android:name=".MainActivity" />
+
+        <activity-alias
+            android:name=".MainAlias"
+            android:exported="true"
+            android:targetActivity=".MainActivity" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+
+        <meta-data
+            android:name="xposedmodule"
+            android:value="true" />
+        <meta-data
+            android:name="xposeddescription"
+            android:value="@string/xposed_description" />
+        <meta-data
+            android:name="xposedminversion"
+            android:value="82" />
+
+        <!-- LSPosed specific -->
+        <meta-data
+            android:name="xposedscope"
+            android:resource="@array/module_scope" />
+    </application>
+
+</manifest>

app/src/main/assets/xposed_init

@@ -0,0 +1 @@
+com.metris.xposed.castenabler.XHooks

app/src/main/java/com/metris/xposed/castenabler/MainActivity.java

@@ -0,0 +1,60 @@
+package com.metris.xposed.castenabler;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.ComponentName;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Looper;
+import android.widget.Toast;
+
+import java.util.Objects;
+
+public class MainActivity extends Activity {
+    private AlertDialog alert;
+    private boolean dismissForConfigChange = false;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        //hide all the graphics because we use the dialog only
+        setTitle("");
+        overridePendingTransition(0, 0);
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.Theme_Dialog)
+                .setTitle(R.string.app_name)
+                .setMessage(R.string.info_text)
+                .setNeutralButton(R.string.feedback, (dialog, which) ->
+                        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.feedback_url)))))
+                .setNegativeButton(R.string.hide_app, (dialog, which) -> {
+                    Toast.makeText(this, R.string.goodbye, Toast.LENGTH_LONG).show();
+                    //hide in the standard Android way (supported on Android 10+ because no permissions)
+                    MainActivity.this.getPackageManager().setComponentEnabledSetting(
+                            new ComponentName(BuildConfig.APPLICATION_ID, BuildConfig.APPLICATION_ID + ".MainAlias"),
+                            PackageManager.COMPONENT_ENABLED_STATE_DISABLED, 0);
+                })
+                .setPositiveButton(R.string.support_me, (dialog, which) ->
+                        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_store)))))
+                .setOnDismissListener((dialog) -> {
+                    if (!dismissForConfigChange)
+                        new Handler(Objects.requireNonNull(Looper.myLooper())).postDelayed(MainActivity.this::finish, 250);
+                    dismissForConfigChange = false;
+                });
+
+        alert = builder.create();
+        alert.show();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        if (alert != null && alert.isShowing()) {
+            dismissForConfigChange = true;
+            alert.dismiss();
+        }
+    }
+}

app/src/main/java/com/metris/xposed/castenabler/XHooks.java

@@ -0,0 +1,85 @@
+package com.metris.xposed.castenabler;
+
+import java.lang.reflect.Constructor;
+import java.util.Arrays;
+
+import de.robv.android.xposed.IXposedHookLoadPackage;
+import de.robv.android.xposed.XC_MethodHook;
+import de.robv.android.xposed.XposedBridge;
+import de.robv.android.xposed.XposedHelpers;
+import de.robv.android.xposed.callbacks.XC_LoadPackage;
+
+public class XHooks implements IXposedHookLoadPackage {
+    private static final String APP_TAG = "[CASTENABLER] ";
+
+    @SuppressWarnings("RedundantThrows")
+    @Override
+    public void handleLoadPackage(XC_LoadPackage.LoadPackageParam lpparam) throws Throwable {
+        //before -> https://android.googlesource.com/platform/frameworks/base/+/refs/tags/android-12.0.0_r25/packages/SystemUI/src/com/android/systemui/volume/VolumeDialogControllerImpl.java#1152
+        //after -> https://android.googlesource.com/platform/frameworks/base/+/refs/tags/android-12.0.0_r27/packages/SystemUI/src/com/android/systemui/volume/VolumeDialogControllerImpl.java#1159
+        String systemUIpkg = "com.android.systemui";
+
+        if (lpparam.packageName.equals(systemUIpkg)) {
+            XposedBridge.log(APP_TAG + "hooking systemui");
+
+            try {
+                Class<?> mediaSessionsCallbacks = XposedHelpers.findClass(
+                        systemUIpkg + ".volume.VolumeDialogControllerImpl$MediaSessionsCallbacks", lpparam.classLoader);
+                Constructor<?>[] constructorList = mediaSessionsCallbacks.getDeclaredConstructors();
+                XposedBridge.log(APP_TAG + "found " + constructorList.length + " constructors");
+
+                for (Constructor<?> currentConstructor : mediaSessionsCallbacks.getDeclaredConstructors()) {
+                    Class<?>[] parameterClass = currentConstructor.getParameterTypes();
+                    Object[] hookObject = new Object[parameterClass.length + 1];
+                    if (parameterClass.length >= 0)
+                        System.arraycopy(parameterClass, 0, hookObject, 0, parameterClass.length);
+
+                    hookObject[hookObject.length - 1] = new XC_MethodHook() {
+                        @Override
+                        protected void afterHookedMethod(MethodHookParam param) throws Throwable {
+                            try {
+                                XposedHelpers.setBooleanField(param.thisObject, "mShowRemoteSessions", true);
+                            } catch (NoSuchFieldError e) {
+                                try {
+                                    XposedHelpers.setBooleanField(param.thisObject, "mVolumeAdjustmentForRemoteGroupSessions", true);
+                                } catch (NoSuchFieldError e1) {
+                                    XposedBridge.log(APP_TAG + "unable to hook VolumeDialogControllerImpl (no mShowRemoteSessions or mVolumeAdjustmentForRemoteGroupSessions)!");
+                                }
+                            }
+                        }
+                    };
+
+                    XposedBridge.log(APP_TAG + "built hook with " + Arrays.toString(hookObject));
+                    XposedHelpers.findAndHookConstructor(mediaSessionsCallbacks, hookObject);
+                }
+            } catch (XposedHelpers.ClassNotFoundError e) {
+                XposedBridge.log(APP_TAG + "cannot find MediaSessionsCallbacks class in systemui!");
+            } catch (NoSuchMethodError e) {
+                XposedBridge.log(APP_TAG + "cannot find MediaSessionsCallbacks constructor in systemui!");
+            }
+        }
+
+        //-----------------------------------
+        //before -> https://android.googlesource.com/platform/frameworks/base/+/refs/tags/android-12.0.0_r25/services/core/java/com/android/server/media/MediaSessionRecord.java#397
+        //after -> https://android.googlesource.com/platform/frameworks/base/+/refs/tags/android-12.0.0_r27/services/core/java/com/android/server/media/MediaSessionRecord.java#465
+        //but no need to hook canHandleVolumeKey(), isPlaybackTypeLocal is always called first
+
+        if ("android".equals(lpparam.packageName)) {
+            XposedBridge.log(APP_TAG + "hooking framework");
+
+            try {
+                XposedHelpers.findAndHookMethod("com.android.server.media.MediaSessionRecord", lpparam.classLoader,
+                        "isPlaybackTypeLocal", new XC_MethodHook() {
+                            @Override
+                            protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
+                                param.setResult(true);
+                            }
+                        });
+            } catch (XposedHelpers.ClassNotFoundError e) {
+                XposedBridge.log(APP_TAG + "cannot find MediaSessionRecord class in framework!");
+            } catch (NoSuchMethodError e) {
+                XposedBridge.log(APP_TAG + "cannot find method isPlaybackTypeLocal in framework!");
+            }
+        }
+    }
+}

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/values-night/colors.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="background">#424242</color>
+    <color name="text">#fafafa</color>
+</resources>

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

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="module_scope">
+        <item>android</item>
+        <item>com.android.systemui</item>
+    </string-array>
+</resources>

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

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="background">#f1f8e9</color>
+    <color name="text">#424242</color>
+    <color name="buttons">@color/text</color>
+    <color name="ic_launcher_background">#9CCC65</color>
+</resources>

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

@@ -0,0 +1,20 @@
+<resources>
+    <string name="app_name" translatable="false">Cast Enabler</string>
+    <string name="url_store" translatable="false">https://play.google.com/store/apps/dev?id=5916168791200129933</string>
+
+    <string name="xposed_description">Simple module to enable cast volume control when disabled by the manufacturer.</string>
+    <string name="info_text">Cast Enabler is an app that allow you to bypass manufacturer restrictions on cast volume control.
+        \nThe purpose of the app is to only enable cast volume control when this was mistakenly disabled by the manufacturer and by no mean was meant to break any law.
+        \n
+        \nRemember that the module is only compatible with Android 12 and that this is a Beta version, if you have any problem please
+        send me a feedback through the thread by clicking the button below.
+        \n
+        \nIf you would like to support my work you can buy one of my other apps, Thank you!
+        \nIf you like instead to stop me worrying you with this you can hide the icon 😭
+    </string>
+    <string name="feedback">Feedback</string>
+    <string name="feedback_url">https://forum.xda-developers.com/t/cast-enabler-for-android-12-xposed.4394713/</string>
+    <string name="support_me">Support me!</string>
+    <string name="hide_app">Hide icon</string>
+    <string name="goodbye">Goodbye my lover…</string>
+</resources>