Prevent Android cpu suspend and cached app freezer

Author: thisisjimmyfb

renderdoc/core/replay_proxy.cpp

@@ -246,6 +246,7 @@ ReplayProxy::ReplayProxy(ReadSerialiser &reader, WriteSerialiser &writer, IRepla
       m_Proxy(proxy),
       m_Remote(NULL),
       m_Replay(NULL),
+      m_PreviewWindow(NULL),
       m_RemoteServer(false)
 {
   m_StructuredFile = new SDFile;

renderdoccmd/CMakeLists.txt

@@ -224,6 +224,7 @@ if(ANDROID)
 
     # Copy in android package files, replacing the package name with the architecture-specific package name
     configure_file(android/Loader.java ${CMAKE_CURRENT_BINARY_DIR}/src/org/renderdoc/renderdoccmd/Loader.java)
+    configure_file(android/DummyService.java ${CMAKE_CURRENT_BINARY_DIR}/src/org/renderdoc/renderdoccmd/DummyService.java)
     configure_file(android/AndroidManifest.xml ${CMAKE_CURRENT_BINARY_DIR}/AndroidManifest.xml)
     configure_file(android/icon.png ${CMAKE_CURRENT_BINARY_DIR}/res/drawable/icon.png COPYONLY)
 

renderdoccmd/android/AndroidManifest.xml

@@ -7,15 +7,18 @@
   <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.INTERNET" />
-
+  <uses-permission android:name="android.permission.WAKE_LOCK"/>
+  
   <!-- Use GL ES 3.2 version -->
   <uses-feature android:glEsVersion="0x00030000" android:required="true" />
 
   <application android:debuggable="true" android:label="RenderDocCmd" android:icon="@drawable/icon" android:hasCode="true">
     <activity android:name=".Loader" android:label="RenderDoc" android:exported="true" android:screenOrientation="landscape" android:configChanges="orientation|keyboardHidden" android:theme="@android:style/Theme.NoTitleBar">
       <meta-data android:name="android.app.lib_name" android:value="renderdoccmd"/>
     </activity>
-
+    
+    <service android:name=".DummyService" android:exported="false" />
+    
   </application>
 </manifest>
 <!-- END_INCLUDE(manifest) -->

renderdoccmd/android/DummyService.java

@@ -0,0 +1,48 @@
+package @RENDERDOC_ANDROID_PACKAGE_NAME@;
+import android.app.Notification;
+import android.content.Intent;
+import android.os.Binder;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.Message;
+import android.os.Process;
+
+public class DummyService extends android.app.Service
+{
+    private Looper serviceLooper;
+    private Handler serviceHandler;
+
+    @Override
+    public void onCreate() {
+        HandlerThread thread = new HandlerThread("DummyServiceThread", Process.THREAD_PRIORITY_BACKGROUND);
+        thread.start();
+
+        serviceLooper = thread.getLooper();
+        serviceHandler = new Handler(serviceLooper);
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        Notification notification = new Notification.Builder(this)
+            .setPriority(Notification.PRIORITY_LOW)
+            .setSmallIcon(R.drawable.icon)
+            .setContentTitle("RenderDoc Dummy Foreground Service")
+            .setContentText("RenderDoc needs this dummy foreground service to prevent cached app freezer from interrupting the network connection")
+            .build();
+        startForeground(startId, notification);
+
+        // If we get killed, don't restart
+        return START_NOT_STICKY;
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @Override
+    public void onDestroy() {
+    }
+}

renderdoccmd/android/Loader.java

@@ -1,9 +1,11 @@
 package @RENDERDOC_ANDROID_PACKAGE_NAME@;
-import android.os.Build;
 import android.app.Activity;
-import android.view.WindowManager;
-import android.os.Environment;
+import android.content.Context;
 import android.content.Intent;
+import android.os.Build;
+import android.os.Environment;
+import android.os.PowerManager;
+import android.view.WindowManager;
 
 public class Loader extends android.app.NativeActivity
 {
@@ -17,6 +19,17 @@ protected void onCreate(android.os.Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
 
+        Context context = getApplicationContext();
+        if(context != null) {
+            PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
+            if(powerManager != null) {
+                wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "renderdoc");
+                wakeLock.acquire();
+            }
+
+            context.startService(new Intent(this, DummyService.class));
+        }
+
         // if we're running on something older than Android M (6.0), return now
         // before requesting permissions as it's not supported
         if(Build.VERSION.SDK_INT < Build.VERSION_CODES.M)
@@ -55,4 +68,14 @@ protected void onCreate(android.os.Bundle savedInstanceState) {
             } catch(Exception e) { }
         }
     }
+
+    @Override
+    protected void onDestroy() {
+        if(wakeLock != null && wakeLock.isHeld()) {
+            wakeLock.release();
+        }
+        super.onDestroy();
+    }
+
+    private PowerManager.WakeLock wakeLock = null;
 }