title: takepicture hangs on Android 2.3.3
body: <p>I have some codes of taking picture which works in Android 2.1 and 2.2.
  But these codes broke at Android 2.3.
  After spending time to fix this issue which went in vain, I would like to ask for help here.</p>
  
  <p>My code flow to take picture is like this:</p>
  
  <p><strong>create a class Camlayer extends SurfaceView</strong></p>
  
  <pre><code>public class CamLayer extends SurfaceView implements SurfaceHolder.Callback {
      private void init(Context context){
          // Install a SurfaceHolder.Callback so we get notified when the
          // underlying surface is created and destroyed.
          mHolder = getHolder();
          mHolder.addCallback(this);
          mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
          mCamera = Camera.open();
      }
  
      public CamLayer(Context context) {
          super(context);
          init(context);
      }
  
      public CamLayer(Context context, AttributeSet attrs) {
          super(context, attrs);
          init(context);
      }
  
      public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
          Log.i(TAG+".surfaceChanged", "being called!");
          Log.i(TAG+".surfaceChanged", "w="+w); 
          Log.i(TAG+".surfaceChanged", "h="+h);
          if (isPreviewRunning) {
              mCamera.stopPreview();
          }
  
          try {
              mCamera.setPreviewDisplay(holder);
              mCamera.setPreviewCallback(mPreviewCallback);
          } catch (IOException e) {
              Log.e(TAG+".surfaceCreated", "mCamera.setPreviewDisplay(holder);");
          }
  
          Camera.Parameters p = mCamera.getParameters();  
          setOptimalSize(p, w, h, SIZEOFPREVIEW);
          setOptimalSize(p, w, h, SIZEOFPICTURE);
          mCamera.setParameters(p);
  
          mCamera.startPreview();
          isPreviewRunning = true;
      }
  
      public void takePicture(){
          Log.i(TAG+".takePicture", "being called!");
          mCamera.takePicture(null, null, mPictureCallback);
          Log.i(TAG+".takePicture", "call ended!");
      }
  }
  </code></pre>
  
  <p><code>CamLayer.takePicture()</code> will be called by external classes to start.</p>
  
  <p>The problem is that at Android 2.3.3, the <code>takePicture</code> will hang, so an ANR problem is found. In <code>/data/anr/traces.txt</code>, below are found. As you can see, the <code>native_takePicture</code> never returns.</p>
  
  <p>DALVIK THREADS:</p>
  
  <pre><code>(mutexes: tll=0 tsl=0 tscl=0 ghl=0 hwl=0 hwll=0)
  "main" prio=5 tid=1 NATIVE
  
    | group="main" sCount=1 dsCount=0 obj=0x40022170 self=0xce68
  
    | sysTid=2411 nice=0 sched=0/0 cgrp=default handle=-1345006464
  
    at android.hardware.Camera.native_takePicture(Native Method)
  
    at android.hardware.Camera.takePicture(Camera.java:746)
  
    at android.hardware.Camera.takePicture(Camera.java:710)
  
    at oms.cj.tube.camera.CamLayer.takePicture(CamLayer.java:256)
  
    at oms.cj.tube.camera.DefineColor.takePicture(DefineColor.java:61)
  
    at oms.cj.tube.camera.DefineColor.onKeyUp(DefineColor.java:71)
  
    at android.view.KeyEvent.dispatch(KeyEvent.java:1280)
  
    at android.app.Activity.dispatchKeyEvent(Activity.java:2078)
  
    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:16
  66)
    at android.view.ViewRoot.deliverKeyEventToViewHierarchy(ViewRoot.java:2571)
  
    at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2546)
  
    at android.view.ViewRoot.handleMessage(ViewRoot.java:1878)
  
    at android.os.Handler.dispatchMessage(Handler.java:99)
  
    at android.os.Looper.loop(Looper.java:123)
  
    at android.app.ActivityThread.main(ActivityThread.java:3691)
  
    at java.lang.reflect.Method.invokeNative(Native Method)
  
    at java.lang.reflect.Method.invoke(Method.java:507)
  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
  
    at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>Is there anybody having the same problem? And know how to fix it?</p>