Clean SurfaceTexture with black rect

Question

I'm using Exoplayer and an GL SurfaceTexture (from a TextureView) to display a video. I'm reusing the same surface among video play.

I release the player and instantiate a new one. When the SurfaceTexture is displayed the second time, it display the old Texture from last video until the player begin to play and fill the Surface with black.

I'm looking for a way to draw a black rect to fill the surface with black, but unable to achieve this.

Answer 1

Using @fadden link on Grafika, I've made my own script to clear the surface. It's compatible from API 16.

GIST

/**
 * Clear the given surface Texture by attaching a GL context and clearing the surface.
 * @param texture a valid SurfaceTexture
 */
private void clearSurface(SurfaceTexture texture) {
    if(texture == null){
        return;
    }

    EGL10 egl = (EGL10) EGLContext.getEGL();
    EGLDisplay display = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
    egl.eglInitialize(display, null);

    int[] attribList = {
            EGL10.EGL_RED_SIZE, 8,
            EGL10.EGL_GREEN_SIZE, 8,
            EGL10.EGL_BLUE_SIZE, 8,
            EGL10.EGL_ALPHA_SIZE, 8,
            EGL10.EGL_RENDERABLE_TYPE, EGL10.EGL_WINDOW_BIT,
            EGL10.EGL_NONE, 0,      // placeholder for recordable [@-3]
            EGL10.EGL_NONE
    };
    EGLConfig[] configs = new EGLConfig[1];
    int[] numConfigs = new int[1];
    egl.eglChooseConfig(display, attribList, configs, configs.length, numConfigs);
    EGLConfig config = configs[0];
    EGLContext context = egl.eglCreateContext(display, config, EGL10.EGL_NO_CONTEXT, new int[]{
            12440, 2,
            EGL10.EGL_NONE
    });
    EGLSurface eglSurface = egl.eglCreateWindowSurface(display, config, texture,
            new int[]{
                    EGL10.EGL_NONE
            });

    egl.eglMakeCurrent(display, eglSurface, eglSurface, context);
    GLES20.glClearColor(0, 0, 0, 1);
    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
    egl.eglSwapBuffers(display, eglSurface);
    egl.eglDestroySurface(display, eglSurface);
    egl.eglMakeCurrent(display, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_SURFACE,
            EGL10.EGL_NO_CONTEXT);
    egl.eglDestroyContext(display, context);
    egl.eglTerminate(display);
}