Drawing over my own custom View

Question

I've created my own View (in which I draw on Canvas), and I want to make another Layer (with buttons etc.) on top of it. How can I do this?

Answer 1

Create a FrameLayout and add the views you want there - the FrameLayout allows for Overlaying of controls.

Just be sure that the top one has some opacity set, otherwise you won't see the controls below it - also be careful of the order you add the Views.

FrameLayout layers = new FrameLayout(this);
CustomViewBottom bottom = new CustomViewBottom(this);
CustomViewOverlay overlay = new CustomViewOverlay(this);
//the overlay class must set the ALPHA property 
//of the PAINT object that it uses to draw

layers.addView(bottom);
layers.addView(overlay);
this.setContentView(layers);

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