How i can correctly set up CONTROL_SCENE_MODE_ACTI

I need to set up CONTROL_SCENE_MODE_ACTION for my app camera2API.

i tryed to set it captureStillPicture() method then in lockFocus() method then in stateCallback but is doesn't work...

In documentation i found only explanation what it is, but any lines how this mode have to be set up...

There are 2 question:

Where exacly i have to set up this mode
How i can check that it is working

Or maybe you can suggest me how to reduse expose time...

Thanks in advance

You can modify Camera2BasicFragment from Google Camera2Basic sample by add line

mPreviewRequestBuilder.set(CaptureRequest.CONTROL_SCENE_MODE, CaptureRequest.CONTROL_SCENE_MODE_ACTION);

just after line

mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);

in onConfigured() method of example

@Override
public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
    // The camera is already closed
    if (null == mCameraDevice) {
        return;
    }

    // When the session is ready, we start displaying the preview.
    mCaptureSession = cameraCaptureSession;
    try {
        // Auto focus should be continuous for camera preview.
        mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE,
                CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
        mPreviewRequestBuilder.set(CaptureRequest.CONTROL_SCENE_MODE,
                CaptureRequest.CONTROL_SCENE_MODE_ACTION);
        // Flash is automatically enabled when necessary.
        setAutoFlash(mPreviewRequestBuilder);

        // Finally, we start displaying the camera preview.
        mPreviewRequest = mPreviewRequestBuilder.build();
        mCaptureSession.setRepeatingRequest(mPreviewRequest,
                mCaptureCallback, mBackgroundHandler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}