How can I disable/dim the screen when I click the pause button?

Question

I am working in an android game using cocos2d. I want to dim the background screen when I click the pause button.

How can I do this ?

Answer 1

I achieved this effect by using a specified pixel from a texture I was already using in this way:

  CCSprite *layer = [CCSprite spriteWithTexture:TEX_INTERFACE.textureAtlas.texture rect:CGRectMake(87, 143, 1, 1)];
  CGSize size = [[CCDirector sharedDirector] winSize];
  layer.scaleX = size.width;
  layer.scaleY = size.height;
  layer.position = ccp(size.width/2, size.height/2);
  layer.opacity = 0;
  [game addChild:layer z:100 tag:TAG_PAUSE_OVERLAY];
  id action = [CCEaseOut actionWithAction:[CCActionTween actionWithDuration:0.1 key:@"opacity" from:0 to:220] rate:2];
  [layer runAction:action];

Mind: this is Cocos2D for Objective-C, not for Android but translating it is straightforward

Answer 2

I would need a bit of code to give a more detailed answer, but you probably want to use glClearColor when you "click the pause button".