Capturing black images on various devices

[heitaoflower]

I encountered this issue at SAMSUNG and Huawei series devices.

The essential cause of the problem is the time to invoke the queueevent function.

What we should do is that always invoking this function after the draw frame.

Here is my tinkered code snippet.

public final void onDrawFrame(final GL10 gl) {
        synchronized (runOnDraw) {
            while (!runOnDraw.isEmpty()) {
                runOnDraw.poll().run();
            }
        }

        framebufferObject.enable();

        onDrawFrame(framebufferObject);

        GLES20.glBindFramebuffer(GL_FRAMEBUFFER, 0);

        GLES20.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        normalShader.draw(framebufferObject.getTexName(), null);

        synchronized (runOnDrawEnd) {
            while (!runOnDrawEnd.isEmpty()) {
                runOnDrawEnd.poll().run();
            }
        }

    } 

Anyway, hope you guys fix this issue.