Android Camera2 configure crashes without reporting proper error

问题

I am trying some preview frame processing on top of camera2basic example from android. createCaptureSession call is failing with no so useful error reporting. Can someone help me understand whats going wrong?

Following works and still image capturing works as expected

mCameraDevice.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface()),

Following also works with my custom frame processing happening

mPreviewRequestBuilder.addTarget(mFrameReader.getSurface());
mCameraDevice.createCaptureSession(Arrays.asList(surface, mFrameReader.getSurface()), ....

However, its fails without proper error reporting when try both the things together

mPreviewRequestBuilder.addTarget(mFrameReader.getSurface());
mCameraDevice.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface(), mFrameReader.getSurface()),

I see following error in logs and my app crashes

06-20 06:37:56.430 28839-29176/com.example.android.camera2basic E/CameraCaptureSession: Session 0: Failed to create capture session; configuration failed

For reference heres the whole method

    /**
 * Creates a new {@link CameraCaptureSession} for camera preview.
 */
private void createCameraPreviewSession() {
    try {
        SurfaceTexture texture = mTextureView.getSurfaceTexture();
        assert texture != null;

        // We configure the size of default buffer to be the size of camera preview we want.
        texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());

        // This is the output Surface we need to start preview.
        Surface surface = new Surface(texture);

        // We set up a CaptureRequest.Builder with the output Surface.
        mPreviewRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);

        mPreviewRequestBuilder.addTarget(surface);

        mPreviewRequestBuilder.addTarget(mFrameReader.getSurface());

        // Here, we create a CameraCaptureSession for camera preview.
        mCameraDevice.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface(), mFrameReader.getSurface()),
                new CameraCaptureSession.StateCallback() {

                    @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);
                            // 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();
                        }
                    }

                    @Override
                    public void onConfigureFailed(
                            @NonNull CameraCaptureSession cameraCaptureSession) {
                        showToast("Failed");
                    }
                }, null
        );
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}

来源：https://stackoverflow.com/questions/44650843/android-camera2-configure-crashes-without-reporting-proper-error