First, a bit of logic missing from the Activity. onPause' should call theonPause’ method of the OGL surface.
[code]— w:\sw\juce\modules\juce_core\native\java\JuceAppActivity.java 2012-12-21 16:57:25.000000000 -0000
+++ c:\sw\juce\modules\juce_core\native\java\JuceAppActivity.java 2013-01-07 21:33:25.000000000 -0000
@@ -78,35 +89,48 @@
super.onDestroy();
}
@Override
protected final void onPause()
{
-
viewHolder.onPause(); suspendApp(); super.onPause();}
@Override
protected final void onResume()
{
super.onResume(); -
viewHolder.onResume(); resumeApp();}
@Override
public void onConfigurationChanged (Configuration cfg)
{
super.onConfigurationChanged (cfg);
setContentView (viewHolder);
}private void callAppLauncher()
{
launchApp (getApplicationInfo().publicSourceDir,
getApplicationInfo().dataDir);
}//==============================================================================
private native void launchApp (String appFile, String appDataDir);
private native void quitApp();
private native void suspendApp();
private native void resumeApp();
@@ -161,12 +185,40 @@
setScreenSize (getWidth(), getHeight());if (isFirstResize) { isFirstResize = false; callAppLauncher(); -
} -
} -
public final void onPause() -
{ -
int n = getChildCount(); -
for (int i = 0; i < n; ++i) -
{ -
View v = getChildAt(i); -
if (v instanceof ComponentPeerView) -
{ -
ComponentPeerView pv = (ComponentPeerView)v; -
pv.onPause(); -
} -
} -
} -
public final void onResume() -
{ -
int n = getChildCount(); -
for (int i = 0; i < n; ++i) -
{ -
View v = getChildAt(i); -
if (v instanceof ComponentPeerView) -
{ -
ComponentPeerView pv = (ComponentPeerView)v; -
pv.onResume(); -
} } } private boolean isFirstResize = true;}
@@ -434,30 +479,64 @@
public boolean containsPoint (int x, int y)
{
return true; //xxx needs to check overlapping views
}
-
OpenGLView glView; -
public final void onPause() -
{ -
if (glView != null) -
glView.onPause(); -
} -
public final void onResume() -
{ -
if (glView != null) -
glView.onResume(); -
} -
public OpenGLView createGLView() {
-
OpenGLView glView = new OpenGLView (getContext());
-
glView = new OpenGLView (getContext()); addView (glView); return glView; }}
//==============================================================================
public final class OpenGLView extends GLSurfaceView
implements GLSurfaceView.Renderer
{
OpenGLView (Context context)
{
super (context);
setEGLContextClientVersion (2);
setRenderer (this);
setRenderMode (RENDERMODE_WHEN_DIRTY);
}@Override public void onSurfaceCreated (GL10 unused, EGLConfig config) { contextCreated();
[/code]
Then there is an additional problem with the MessageManagerLock.
With the above onPause' changes, an app can be paused and resumed providing it is only rendering 3D. However, if we are also callingpaint’ in the same component, the MM lock is taken.
When `onPause’ is encountered, somehow the lock is often being held whilst suspended, whence resume cannot issue any events and deadlock occurs. Sometimes you have to kill the app with the task manager it’s that bad.
I’ve been looking for a way to fix this. maybe the suspendApp' call should, beforesuspended’ is called, issue a signal to the opengl thread to stop rather than letting Android do it. I don’t know when android is actually doing this. Perhaps it (ie the suspend) can happen at any OGL system call.