Android ImageReader.acquireLatestImage returns invalid JPG

Question

I am using Android ImageReader class to receive Bitmaps from MediaProjection.createVirtualDisplay method.

My code so far looks like this:

mProjectio         


        

Answer 1

I tried to use many example code. But none of those codes are working. I mixed those codes myself. And I created working sample code.

    final DisplayMetrics dm = getResources().getDisplayMetrics();
    mImageReader = ImageReader.newInstance(dm.widthPixels, dm.heightPixels, PixelFormat.RGBA_8888, 1);
    mProjection.createVirtualDisplay("screen-mirror", dm.widthPixels, dm.heightPixels, dm.densityDpi, DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, mImageReader.getSurface(), vdCallback, mHandler);
    mImageReader.setOnImageAvailableListener(new ImageReader.OnImageAvailableListener() {
        @Override
        public void onImageAvailable(ImageReader reader) {
            Image image = reader.acquireLatestImage();
            if (image == null){
                return;
            }
            final Image.Plane[] planes = image.getPlanes();
            final ByteBuffer buffer = planes[0].getBuffer();
            int offset = 0;
            int pixelStride = planes[0].getPixelStride();
            int rowStride = planes[0].getRowStride();
            int rowPadding = rowStride - pixelStride * dm.widthPixels;
            // create bitmap
            Bitmap bitmap = Bitmap.createBitmap(dm.widthPixels+rowPadding/pixelStride, dm.heightPixels, Bitmap.Config.ARGB_8888);
            bitmap.copyPixelsFromBuffer(buffer);
            imageView.setImageBitmap(bitmap);
            image.close();
        }
    }, mHandler);