Capture picture without preview using camera2 API

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You should capture photos in “onConfigured” function but not onImageAvailable.

public void onConfigured(CameraCaptureSession session) {
            cameraCaptureSession = session;
            createCaptureRequest();
        }

In this function “onImageAvailable”,you should save images,

Image image = mImageReader.acquireLatestImage();
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.remaining()];
buffer.get(bytes);
try {
    save(bytes, file);
} catch (IOException e) {
    e.printStackTrace();
}
image.close();

“onImageAvailable” function will be invoked after session.capture() .

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