android - java.lang.RuntimeException : Method called after release()

如果我不使用 mCamera.release(); 中的 surfaceDestroyed(....)，然后无法从另一个 Activity 重新启动CameraActivity [总之，得到不幸的是，应用程序已停止]错误，甚至没有释放Camera ，但如果我在首页上轻按，按钮[CameraActivity 中的]，然后再次启动我的应用程序，没有收到任何错误(总之，可以正常工作，并且没有任何问题地打开CameraActivity)

如果我在 surfaceDestroyed(....)中使用 * mCamera.release(); *成为，则能够再次从另一个 Activity 和启动CameraActivity，并在ijt_rstrong时释放Camera和，但是在ojit_点击“主页”按钮，然后再次启动我的应用，但不幸的是，该应用已停止 ....:

但是我希望两者一起工作(首先，从CameraActivity轻按Home，然后再次从CameraActivity启动应用-无任何错误)和(第二，从另一个 Activity 启动照相机-无任何错误)

就像我写的一样，这两件事对我都有效，但不能一起使用.....

行号33是:

        Camera.Parameters parameters = mCamera.getParameters();

完成日志:

12-30 12:18:58.070: W/dalvikvm(14822): threadid=1: thread exiting with uncaught exception (group=0x41ef72a0)
12-30 12:18:58.080: E/AndroidRuntime(14822): FATAL EXCEPTION: main
12-30 12:18:58.080: E/AndroidRuntime(14822): java.lang.RuntimeException: Method called after release()
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.hardware.Camera.native_getParameters(Native Method)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.hardware.Camera.getParameters(Camera.java:1487)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at app.micheal.camr.PreviewSurface.surfaceCreated(PreviewSurface.java:33)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.SurfaceView.updateWindow(SurfaceView.java:609)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:235)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.View.dispatchWindowVisibilityChanged(View.java:7686)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1339)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1114)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4520)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.Choreographer.doCallbacks(Choreographer.java:555)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.Choreographer.doFrame(Choreographer.java:525)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.os.Handler.handleCallback(Handler.java:615)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.os.Handler.dispatchMessage(Handler.java:92)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.os.Looper.loop(Looper.java:137)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.app.ActivityThread.main(ActivityThread.java:4921)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at java.lang.reflect.Method.invokeNative(Native Method)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at java.lang.reflect.Method.invoke(Method.java:511)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1036)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:803)
12-30 12:18:58.080: E/AndroidRuntime(14822):    at dalvik.system.NativeStart.main(Native Method)
12-30 12:19:08.095: I/Process(14822): Sending signal. PID: 14822 SIG: 9

PreviewSurface.java:

public class PreviewSurface extends SurfaceView implements
SurfaceHolder.Callback {

    public static final String LOG_TAG = "CameraPreview";
    private SurfaceHolder mSurfaceHolder;

    private Camera mCamera;
    Camera.Parameters parameters = null ;

    // Constructor that obtains context and camera
    @SuppressWarnings("deprecation")
    public PreviewSurface(Context context, Camera camera) {
        super(context);
        this.mCamera = camera;
        this.mSurfaceHolder = this.getHolder();
        this.mSurfaceHolder.addCallback(this);
        this.mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        this.mSurfaceHolder.setFixedSize(100, 100);
    }

    @Override
    public void surfaceCreated(SurfaceHolder surfaceHolder) {
        try {
                parameters = mCamera.getParameters();

                if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE)
                {
                     parameters.set("orientation", "portrait");
                     mCamera.setDisplayOrientation(90);
                     parameters.setRotation(90);
                     mCamera.setPreviewDisplay(surfaceHolder);
                     mCamera.startPreview();
                }
                else
                {
                     // This is an undocumented although widely known feature
                     parameters.set("orientation", "landscape");
                     // For Android 2.2 and above
                     mCamera.setDisplayOrientation(0);
                     // Uncomment for Android 2.0 and above
                     parameters.setRotation(0);
                }

                mCamera.setPreviewDisplay(surfaceHolder);
                mCamera.startPreview();

            } catch (IOException e) {
                // left blank for now
            }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
        mCamera.stopPreview();
        mCamera.release();
    }


    @Override
    public void surfaceChanged(SurfaceHolder surfaceHolder, int format,
            int width, int height) {

        try {
            parameters = mCamera.getParameters();
            if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
                 parameters.set("orientation", "portrait");
                 mCamera.setDisplayOrientation(90);
                 parameters.setRotation(90);

            }
                 else {
                      // This is an undocumented although widely known feature
                      parameters.set("orientation", "landscape");
                      // For Android 2.2 and above
                      mCamera.setDisplayOrientation(0);
                      // Uncomment for Android 2.0 and above
                      parameters.setRotation(0);
            }
            mCamera.setPreviewDisplay(surfaceHolder);
            mCamera.startPreview();


        } catch (IOException e) {
            // left blank for now
        }
    }

}

最佳答案

尝试一下，用我的代码替换您的代码，我想这会为您提供帮助，我还没有尝试过，但是看起来它可以解决您的错误

      @Override
    public void surfaceDestroyed(SurfaceHolder surfaceHolder) {

        this.getHolder().removeCallback(this);
        mCamera.stopPreview();
        mCamera.release();
    }

让我尽快知道...