GLSurfaceView - how to make translucent background

Question

I try to render using GLSurfaceView, and by docs I set format:

getHolder().setFormat(PixelFormat.TRANSLUCENT);

The I use GLSurfaceView.Rend

Answer 1

I'm not sure what the problem is exactly but an alternative could be covering the screen with a translucent colored rectangle and just clearing the depth buffer bit.

Is there any alternative for GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT)?

Otherwise make sure your depth buffer bit is 1

I'll be back later to try and recreate the problem on my phone in a bit when I can.

Edit: I just realized that the reason it appears blue may be that you set it to .5f so it only takes 2 calls for it to get to full 1f opacity. meaning that it takes at 30fps 1/15th of a second to go fully blue.

Try lowering the alpha transparency value to 0.01f or 0.05f