Question

I have something to draw at runtime. I did drawing in onDraw in MyView class.
Because, I already used setContentView(R.layout.main) in onCreate, I cannot use it again.
How to call onDraw after setContentView(R.layout.main)?

public class MyActivity extends Activity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main); // I have something to draw in XML also.
        MyView myView = new MyView(this);
        // setContentView(myView); I cannot use setContentView two times.
}
protected class MyView extends View {
    public MyView(Context context) {
        super(context);
    }
    public void onDraw(Canvas canvas) {
           // there are some drawing codes and these cannot be done in XML.
    }
}

Answer 1

I see two ways

1:
You could add your myView (instance) to an ViewGroup defined in R.layout.main

2:
You could directly add use MyView in your XML R.layout.main.
Instead of “LinearLayout” and so on, you the full qualified class name

see http://developer.android.com/guide/topics/ui/custom-components.html (at bottom)