我的相机活动会继续强制关闭“表面破坏”

时间：2014-11-17 21:20:50

标签： android camera android-camera surfaceview forceclose

所以，我正在制作相机应用程序，我不了解所有代码，但大多数代码。我从网上复制了一些代码。我的活动一直强制关闭表面破坏方法。当我点击图片时，我无法分辨为什么它会一直关闭。因为当我点击图片时，我会启动一个Intent来进行新的活动。那是表面被破坏的时候。顺便说一下，我的表面是我相机预览正在进行的相对布局。错误发生在OnSurfaceDestroyed方法的ShowCamera类中。我可以看到预览。当我尝试点击图片时应用关闭。

这是我的代码。从我的MainActivity.java中，我在onCreateMethod

中发送以下代码 
Camera frontCam = Camera.open(1) // 1 is for front cam
Show Camera showCamera = new ShowCamera(this, frontCam);

从MainActivity.java我发送下面的代码onCapture of a picture 

private PictureCallback capturedIt = new PictureCallback() {

    @Override
    public void onPictureTaken(byte[] data, Camera camera) {

        Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);

        if (bitmap == null) {
            Toast.makeText(getApplicationContext(), "not taken",
                    Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(getApplicationContext(), "taken",
                    Toast.LENGTH_SHORT).show();
            Intent viewerIntent = new Intent("com.tyrone.mirrorapp.AFTERCAPTURE");
            viewerIntent.setClass(MainActivity.this, afterCapture.class);
            Bundle bitmapBundle = new Bundle();
            bitmapBundle.putByteArray("clickedBitmap", data);
            viewerIntent.putExtras(bitmapBundle);
            startActivityForResult(viewerIntent,0);
        }
        cameraObject.release();
    }

};

这是我下面的ShowCamera.java类

public class ShowCamera extends SurfaceView implements SurfaceHolder.Callback {

private SurfaceHolder holdMe;
   Camera theCamera;

public ShowCamera(Context context,Camera camera) {
      super(context);
      theCamera = camera;
      holdMe = getHolder();
      holdMe.addCallback(this);
   }

   @Override
   public void surfaceChanged(SurfaceHolder arg0, int arg1, int width, int height) {
       theCamera.setDisplayOrientation(90);//cz the fron cam doesn't adjust.
       theCamera.startPreview();
   }

   @Override
   public void surfaceCreated(SurfaceHolder holder) {
       try {
        theCamera.setPreviewDisplay(holder);
    } catch (IOException e) {
        e.printStackTrace();
    }
   }

   @Override
   public void surfaceDestroyed(SurfaceHolder holder) {
       theCamera.setPreviewCallback(null); 
       theCamera.stopPreview();
       theCamera.release();
       theCamera = null;
   }

}

我的活动一直强制关闭活动的破坏。任何想法可能是什么原因？ 附： ：我不完全确定它强制关闭SurfaceDestroyed。如果我错了，请纠正我。谢谢

我的日志文件的一部分

11-18 20:30:31.877: I/SurfaceView(21648): Callback --> surfaceCreated
11-18 20:30:31.877: I/SurfaceView(21648): surfaceCreated callback +
11-18 20:30:31.877: D/setting preview display(21648): getting Ready
11-18 20:30:31.879: D/AndroidRuntime(21648): Shutting down VM
11-18 20:30:31.879: W/dalvikvm(21648): threadid=1: thread exiting with uncaught exception (group=0x41a00c98)
11-18 20:30:31.879: W/dalvikvm(21648): threadid=1: uncaught exception occurred
11-18 20:30:31.879: W/System.err(21648): java.lang.RuntimeException: Method called after release()
11-18 20:30:31.880: W/System.err(21648):    at android.hardware.Camera.setPreviewDisplay(Native Method)
11-18 20:30:31.880: W/System.err(21648):    at android.hardware.Camera.setPreviewDisplay(Camera.java:580)
11-18 20:30:31.880: W/System.err(21648):    at com.tyrone.mirrorapp.ShowCamera.surfaceCreated(ShowCamera.java:66)
11-18 20:30:31.880: W/System.err(21648):    at android.view.SurfaceView.updateWindow(SurfaceView.java:662)
11-18 20:30:31.881: W/System.err(21648):    at android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:256)
11-18 20:30:31.881: W/System.err(21648):    at com.tyrone.mirrorapp.ShowCamera.onWindowVisibilityChanged(ShowCamera.java:98)
11-18 20:30:31.881: W/System.err(21648):    at android.view.View.dispatchWindowVisibilityChanged(View.java:8096)
11-18 20:30:31.881: W/System.err(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.881: W/System.err(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.881: W/System.err(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.881: W/System.err(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.881: W/System.err(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.881: W/System.err(21648):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1448)
11-18 20:30:31.881: W/System.err(21648):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1192)
11-18 20:30:31.881: W/System.err(21648):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6231)
11-18 20:30:31.881: W/System.err(21648):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788)
11-18 20:30:31.882: W/System.err(21648):    at android.view.Choreographer.doCallbacks(Choreographer.java:591)
11-18 20:30:31.882: W/System.err(21648):    at android.view.Choreographer.doFrame(Choreographer.java:560)
11-18 20:30:31.882: W/System.err(21648):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:774)
11-18 20:30:31.882: W/System.err(21648):    at android.os.Handler.handleCallback(Handler.java:808)
11-18 20:30:31.882: W/System.err(21648):    at android.os.Handler.dispatchMessage(Handler.java:103)
11-18 20:30:31.882: W/System.err(21648):    at android.os.Looper.loop(Looper.java:193)
11-18 20:30:31.882: W/System.err(21648):    at android.app.ActivityThread.main(ActivityThread.java:5292)
11-18 20:30:31.882: W/System.err(21648):    at java.lang.reflect.Method.invokeNative(Native Method)
11-18 20:30:31.882: W/System.err(21648):    at java.lang.reflect.Method.invoke(Method.java:515)
11-18 20:30:31.883: W/System.err(21648):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)
11-18 20:30:31.883: W/System.err(21648):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
11-18 20:30:31.883: W/System.err(21648):    at dalvik.system.NativeStart.main(Native Method)
11-18 20:30:31.883: W/dalvikvm(21648): threadid=1: calling UncaughtExceptionHandler
11-18 20:30:31.885: E/AndroidRuntime(21648): FATAL EXCEPTION: main
11-18 20:30:31.885: E/AndroidRuntime(21648): Process: com.tyrone.mirrorapp, PID: 21648
11-18 20:30:31.885: E/AndroidRuntime(21648): java.lang.RuntimeException: Method called after release()
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.hardware.Camera.setPreviewDisplay(Native Method)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.hardware.Camera.setPreviewDisplay(Camera.java:580)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at com.tyrone.mirrorapp.ShowCamera.surfaceCreated(ShowCamera.java:66)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.SurfaceView.updateWindow(SurfaceView.java:662)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:256)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at com.tyrone.mirrorapp.ShowCamera.onWindowVisibilityChanged(ShowCamera.java:98)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.View.dispatchWindowVisibilityChanged(View.java:8096)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1110)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1448)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1192)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6231)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.Choreographer.doCallbacks(Choreographer.java:591)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.Choreographer.doFrame(Choreographer.java:560)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:774)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.os.Handler.handleCallback(Handler.java:808)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.os.Handler.dispatchMessage(Handler.java:103)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.os.Looper.loop(Looper.java:193)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at android.app.ActivityThread.main(ActivityThread.java:5292)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at java.lang.reflect.Method.invokeNative(Native Method)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at java.lang.reflect.Method.invoke(Method.java:515)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
11-18 20:30:31.885: E/AndroidRuntime(21648):    at dalvik.system.NativeStart.main(Native Method)

1 个答案:

答案 0 :(得分：1)

您的日志指出异常发生在SurfaceCreated上。在调用此回调之前释放 theCamera 对象。请检查您在应用中释放相机的位置。也许，您在{strong 1}}中将 frontCam 传递给 ShowCamera 构造函数后将其释放。

好的，正如您所解释的那样，当您从另一个返回MainActivity时会发生这种情况。通常的做法是在onCreate()）中打开相机，然后在onResume(中发布。也可以在onPause()中打开相机，然后在ShowCamera.surfaceCreated()中发布（如上面的代码所示）。

建议在后台线程中打开相机，但这需要更精细地调用ShowCamera.surfaceDestroyed()。

相关问题
最新问题