小编Vij*_*xmi的帖子

尝试将相机切换回前面但获得异常.找不到问题请检查并帮助..

error:- 01-27 11:49:00.376: E/AndroidRuntime(30767):
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.vdrecord/com.vdrecord.AndroidVideoCapture}:
java.lang.NullPointerException

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我的代码: -

 public class AndroidVideoCapture extends Activity{
    private static final String TAG = "CameraRecorderActivity";
  private Camera myCamera;
    private MyCameraSurfaceView myCameraSurfaceView;
    private MediaRecorder mediaRecorder;
    private static String val="yes";
    private Button useOtherCamera;
  Button myButton;
  SurfaceHolder surfaceHolder;
  boolean recording;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        recording = false;
        setContentView(R.layout.activity_android_video_capture);
        useOtherCamera = (Button) findViewById(R.id.useOtherCamera);
        useOtherCamera.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                     public void onClick(View …