Android Custom Layout - onDraw() never gets called

Question

public class MainActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
                 


        

Answer 1

If you want that the canvas is be re-draw call invalidate(), and the method onDraw() will be re-executed

Answer 2

By default, onDraw() isn't called for ViewGroup objects. Instead, you can override dispatchDraw().

Alternatively, you can enable ViewGroup drawing by calling setWillNotDraw(false) in your TableView constructor.

EDIT:

For #2: - Initialize it in the constructor, then just call rect.set() in your onLayout() method.

For #3: - Yes, as far as I'm aware the super call will handle it, you shouldn't have to handle that unless you need to customize the way the children are drawn.