Why is bitmap null?

[mqwangios]

Why is bitmap null?

private class SampleFrameProcessor implements FrameProcessor { @Override public void process(@NotNull Frame frame) { // Perform frame processing, if needed Bitmap bitmap = BitmapFactory.decodeByteArray(frame.getImage(), 0, frame.getImage().length); ImageView imageView = findViewById(R.id.result); imageView.setImageBitmap(bitmap); }

[AlCabohne]

Same here :/ Any solutions?

[dmitry-zaitsev]

Frames of the FrameProcessor are in NV21 format which can't be decoded using BitmapFactory. You can still convert it to Bitmap but you would have to use another approach: https://stackoverflow.com/questions/32276522/convert-nv21-byte-array-into-bitmap-readable-format

[mqwangios]

How to set the output size, I think the output is 1080*1920?

[bagage]

For anyone interested, most straightforward method is to use easyrs library:

//in build.gradle
implementations 'io.github.silvaren:easyrs:0.5.3'

Then convert NV21 to bitmap:

RenderScript rs = RenderScript.create(context); // where context can be your activity, application, etc.
Bitmap outputBitmap = Nv21Image.nv21ToBitmap(rs, frame.image, frame.size.width, frame.size.height);