Android 截图错误：RGBA覆盖BLOB格式缓冲区应该有高度==宽度

Question

I am trying to take screenshots of my Android device (Samsung Galaxy Tab S5e) using a service. I am using the code from here .

In the code linked, ImageReader.newInstance(mWidth, mHeight, PixelFormat.RGBA_8888, 2); is used. Note the PixelFormat.RGBA_8888 . Now, this won't allow me to compile my project and I am greeted with the error: Error: Must be one of: ImageFormat.UNKNOWN, ImageFormat.RGB_565... etc .

So I tried changing PixelFormat.RGBA_8888 to ImageFormat.JPEG and it compiles. However, my app now crashes with the message:

RGBA override BLOB format buffer should have height == width

I've tried changing PixelFormat.RGBA_8888 to 0x4 , 0x1 , ImageFormat.RGB_565 and a few others. Doing so often results in an exception with the message:

The producer output buffer format 0x1 doesn't match the ImageReader's configured buffer format 0x4.

This is somehow linked with the format described in onImageAvailable(ImageReader reader) .

I've seen the following SO post , and it seems the correct format is device-specific, but I've tried them all and the error is one of the above.

I'm at a total loss (and I'm a Java/Android newb), so could really use some help.

Answer 1

Create image reader as follows,

 ImageReader imageReader =ImageReader.newInstance(width,
            height,
            PixelFormat.RGBA_8888,
            MAX_IMAGE_COUNT);

Then on the image available listener create bitmap as,

          try {
                image = reader.acquireLatestImage();
                if (image != null && mImagesProduced == 0){
                    Image.Plane[] planes = image.getPlanes();
                    Buffer imageBuffer = planes[0].getBuffer().rewind();

                    int pixelStride = planes[0].getPixelStride();
                    int rowStride = planes[0].getRowStride();
                    int rowPadding = rowStride - pixelStride * width;

                    // create bitmap
                    bitmap = Bitmap.createBitmap(width + rowPadding / pixelStride, height,
                            Bitmap.Config.ARGB_8888);
                    bitmap.copyPixelsFromBuffer(imageBuffer);

                    saveImage(context, bitmap);
                }

Hope it works