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

Have you thought about using a LayerDrawable with setAlpha? Here's an example i have of two images... one is transparent (by the setAlpha) and the other is not. The 'calendar_cell' is solid and is on the back, then comes the box which is transparent to show the calendar cell behind it. This way you can stack as many images as you want giving them all a different transparency.

Drawable []layers = new Drawable [2];
int imageResource1 = mContext.getResources().getIdentifier("drawable/calendar_cell", null, mContext.getPackageName());
Drawable background = v.getResources().getDrawable(imageResource1);
                        layers [0]= background;

int imageResource = mContext.getResources().getIdentifier("drawable/box_" + box, null, mContext.getPackageName());
Drawable boxImg = v.getResources().getDrawable(imageResource);
    boxImg.setAlpha(100);
    layers [1]= boxImg;

LayerDrawable layerDrawable = new LayerDrawable (layers);
v.setBackground(layerDrawable)