systemctx

Suppress lint "DiscouragedPrivateApi" in Workarounds.java.

server/src/main/java/com/genymobile/scrcpy/FakeContext.java

@@ -2,23 +2,42 @@ package com.genymobile.scrcpy;
 
 import android.annotation.TargetApi;
 import android.content.AttributionSource;
-import android.content.MutableContextWrapper;
+import android.content.Context;
+import android.content.ContextWrapper;
 import android.os.Build;
 import android.os.Process;
 
-public final class FakeContext extends MutableContextWrapper {
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+
+public final class FakeContext extends ContextWrapper {
 
     public static final String PACKAGE_NAME = "com.android.shell";
     public static final int ROOT_UID = 0; // Like android.os.Process.ROOT_UID, but before API 29
 
     private static final FakeContext INSTANCE = new FakeContext();
 
+    private static Context retrieveSystemContext() {
+        try {
+            Class<?> activityThreadClass = Class.forName("android.app.ActivityThread");
+            Constructor<?> activityThreadConstructor = activityThreadClass.getDeclaredConstructor();
+            activityThreadConstructor.setAccessible(true);
+            Object activityThread = activityThreadConstructor.newInstance();
+
+            Method getSystemContextMethod = activityThread.getClass().getDeclaredMethod("getSystemContext");
+            return (Context) getSystemContextMethod.invoke(activityThread);
+        } catch (Exception e) {
+            Ln.e("Cannot retrieve system context", e);
+            return null;
+        }
+    }
+
     public static FakeContext get() {
         return INSTANCE;
     }
 
     private FakeContext() {
-        super(null);
+        super(retrieveSystemContext());
     }
 
     @Override

server/src/main/java/com/genymobile/scrcpy/Server.java

@@ -87,7 +87,7 @@ public final class Server {
     }
 
     private static void scrcpy(Options options) throws IOException, ConfigurationException {
-        Ln.i("Device: [" + Build.MANUFACTURER + "] " + Build.BRAND + " " + Build.MODEL + " (Android " + Build.VERSION.RELEASE + ")");
+        Ln.i("Device: " + Build.MANUFACTURER + " " + Build.MODEL + " (Android " + Build.VERSION.RELEASE + ")");
         final Device device = new Device(options);
 
         Thread initThread = startInitThread(options);
@@ -99,7 +99,26 @@ public final class Server {
         boolean audio = options.getAudio();
         boolean sendDummyByte = options.getSendDummyByte();
 
-        Workarounds.apply(audio);
+        Workarounds.prepareMainLooper();
+
+        // Workarounds must be applied for Meizu phones:
+        //  - <https://github.com/Genymobile/scrcpy/issues/240>
+        //  - <https://github.com/Genymobile/scrcpy/issues/365>
+        //  - <https://github.com/Genymobile/scrcpy/issues/2656>
+        //
+        // But only apply when strictly necessary, since workarounds can cause other issues:
+        //  - <https://github.com/Genymobile/scrcpy/issues/940>
+        //  - <https://github.com/Genymobile/scrcpy/issues/994>
+        if (Build.BRAND.equalsIgnoreCase("meizu")) {
+            Workarounds.fillAppInfo();
+        }
+
+        // Before Android 11, audio is not supported.
+        // Since Android 12, we can properly set a context on the AudioRecord.
+        // Only on Android 11 we must fill the application context for the AudioRecord to work.
+        if (audio && Build.VERSION.SDK_INT == Build.VERSION_CODES.R) {
+            Workarounds.fillAppContext();
+        }
 
         List<AsyncProcessor> asyncProcessors = new ArrayList<>();
 

server/src/main/java/com/genymobile/scrcpy/Workarounds.java

@@ -4,7 +4,6 @@ import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Application;
 import android.content.AttributionSource;
-import android.content.Context;
 import android.content.ContextWrapper;
 import android.content.pm.ApplicationInfo;
 import android.media.AudioAttributes;
@@ -28,55 +27,8 @@ public final class Workarounds {
         // not instantiable
     }
 
-    public static void apply(boolean audio) {
-        Workarounds.prepareMainLooper();
-
-        boolean mustFillAppInfo = false;
-        boolean mustFillBaseContext = false;
-        boolean mustFillAppContext = false;
-
-
-        if (Build.BRAND.equalsIgnoreCase("meizu")) {
-            // Workarounds must be applied for Meizu phones:
-            //  - <https://github.com/Genymobile/scrcpy/issues/240>
-            //  - <https://github.com/Genymobile/scrcpy/issues/365>
-            //  - <https://github.com/Genymobile/scrcpy/issues/2656>
-            //
-            // But only apply when strictly necessary, since workarounds can cause other issues:
-            //  - <https://github.com/Genymobile/scrcpy/issues/940>
-            //  - <https://github.com/Genymobile/scrcpy/issues/994>
-            mustFillAppInfo = true;
-        } else if (Build.BRAND.equalsIgnoreCase("honor")) {
-            // Honor devices require in addition a system context as a base context of FakeContext:
-            //  - <https://github.com/Genymobile/scrcpy/issues/4015>
-            // The system context must not be set for all devices, because it would cause other problems:
-            //  - <https://github.com/Genymobile/scrcpy/issues/4015#issuecomment-1595382142>
-            //  - <https://github.com/Genymobile/scrcpy/issues/3805#issuecomment-1596148031>
-            mustFillAppInfo = true;
-            mustFillBaseContext = true;
-            mustFillAppContext = true;
-        }
-
-        if (audio && Build.VERSION.SDK_INT == Build.VERSION_CODES.R) {
-            // Before Android 11, audio is not supported.
-            // Since Android 12, we can properly set a context on the AudioRecord.
-            // Only on Android 11 we must fill the application context for the AudioRecord to work.
-            mustFillAppContext = true;
-        }
-
-        if (mustFillAppInfo) {
-            Workarounds.fillAppInfo();
-        }
-        if (mustFillBaseContext) {
-            Workarounds.fillBaseContext();
-        }
-        if (mustFillAppContext) {
-            Workarounds.fillAppContext();
-        }
-    }
-
     @SuppressWarnings("deprecation")
-    private static void prepareMainLooper() {
+    public static void prepareMainLooper() {
         // Some devices internally create a Handler when creating an input Surface, causing an exception:
         //   "Can't create handler inside thread that has not called Looper.prepare()"
         // <https://github.com/Genymobile/scrcpy/issues/240>
@@ -105,7 +57,7 @@ public final class Workarounds {
     }
 
     @SuppressLint("PrivateApi,DiscouragedPrivateApi")
-    private static void fillAppInfo() {
+    public static void fillAppInfo() {
         try {
             fillActivityThread();
 
@@ -134,7 +86,7 @@ public final class Workarounds {
     }
 
     @SuppressLint("PrivateApi,DiscouragedPrivateApi")
-    private static void fillAppContext() {
+    public static void fillAppContext() {
         try {
             fillActivityThread();
 
@@ -153,19 +105,6 @@ public final class Workarounds {
         }
     }
 
-    public static void fillBaseContext() {
-        try {
-            fillActivityThread();
-
-            Method getSystemContextMethod = activityThreadClass.getDeclaredMethod("getSystemContext");
-            Context context = (Context) getSystemContextMethod.invoke(activityThread);
-            FakeContext.get().setBaseContext(context);
-        } catch (Throwable throwable) {
-            // this is a workaround, so failing is not an error
-            Ln.d("Could not fill base context: " + throwable.getMessage());
-        }
-    }
-
     @TargetApi(Build.VERSION_CODES.R)
     @SuppressLint("WrongConstant,MissingPermission,BlockedPrivateApi,SoonBlockedPrivateApi,DiscouragedPrivateApi")
     public static AudioRecord createAudioRecord(int source, int sampleRate, int channelConfig, int channels, int channelMask, int encoding) {