android中的屏幕截图

Question

我从这里尝试了很多解决方案，但仍然无法获得整个屏幕的屏幕截图，只有一张可以生成到sdcard。

这是我的代码：

 public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        // Set the layout from video_main.xml
        setContentView(R.layout.main);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

        getWindow().setFormat(PixelFormat.UNKNOWN);
        surfaceView = (SurfaceView) findViewById(R.id.surfacelayout);
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(this);
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        controlInflater = LayoutInflater.from(getBaseContext());
        final View viewControl = controlInflater.inflate(R.layout.imagecontrol,
                null);
        LayoutParams layoutParamsControl = new LayoutParams(
                LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
        this.addContentView(viewControl, layoutParamsControl);

        // Find your VideoView in your video_main.xml layout
        imageview = (ImageView) findViewById(R.id.imagePoster);

        Intent i = getIntent();

        poster = i.getStringExtra("url_poster");

        ImageLoader imgLoader = new ImageLoader(getApplicationContext());
        imgLoader.DisplayImage(poster, imageview);
        System.out.println(poster);

        Button buttonTakePicture = (Button) findViewById(R.id.takepicture);
        buttonTakePicture.setOnClickListener(new Button.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                View v = viewControl.getRootView();
                v.setDrawingCacheEnabled(true);
                Bitmap bitmap = v.getDrawingCache();
                String dest = Environment
                        .getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)
                        + File.separator
                        + "Camera"
                        + File.separator
                        + "IMG_"
                        + new DateFormat()
                                .format("yyyyMMdd_hhmmss", new Date()) + ".jpg";
                Log.d(APP_TAG, "Writing to: " + dest);
                File file = new File(dest);
                try {
                    FileOutputStream stream = new FileOutputStream(file);
                    bitmap.compress(CompressFormat.JPEG, 100, stream);
                    stream.flush();
                    stream.close();
                } catch (IOException e) {
                    Log.e(APP_TAG, "Error taking screenshot.", e);
                } finally {
                    v.setDrawingCacheEnabled(false);
                }
            }

        });
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        // TODO Auto-generated method stub
        if (previewing) {
            camera.stopPreview();
            previewing = false;
        }

        if (camera != null) {
            try {
                camera.setPreviewDisplay(surfaceHolder);
                camera.startPreview();
                previewing = true;
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        // TODO Auto-generated method stub
        camera = Camera.open();
        camera.setDisplayOrientation(90);
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        // TODO Auto-generated method stub
        camera.stopPreview();
        camera.release();
        camera = null;
        previewing = false;
    }

我仍然会收到黑屏，只有一个布局会获得屏幕截图，而不是整个屏幕...

如何获取全屏截图？

我当然想要没有根的截图...

谢谢