android mediaprojection截图包含黑框

我正在使用MediaProjection录制我的屏幕,如下所示

Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
displayWidth = size.x;
displayHeight = size.y;

imageReader = ImageReader.newInstance(displayWidth, displayHeight, ImageFormat.JPEG, 5);

int flags = DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY | DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC;

DisplayMetrics metrics = getResources().getDisplayMetrics();
int density = metrics.densityDpi;

mediaProjection.createVirtualDisplay("test", displayWidth, displayHeight, density, flags, 
      imageReader.getSurface(), null, projectionHandler);

Image image = imageReader.acquireLatestImage();
byte[] data = getDataFromImage(image);
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);

问题是捕获的图像包含如下图像的黑框.

编辑

上述问题可以通过位图操作来解决.

不过,我现在正在寻找可以应用到解决方案MediaProjection或SurfaceView中ImageReader实现设备记录.

如果您自己无法控制图像,可以通过执行类似的操作来修改它,假设您的位图称为图像.

Bitmap imageWithBG = Bitmap.createBitmap(image.getWidth(), image.getHeight(),image.getConfig());  // Create another image the same size
imageWithBG.eraseColor(Color.BLACK);  // set its background to white, or whatever color you want
Canvas canvas = new Canvas(imageWithBG);  // create a canvas to draw on the new image
canvas.drawBitmap(image, 0f, 0f, null); // draw old image on the background
image.recycle();