Android Button setAlpha

Question

There are a set of buttons, I want to get the result:

When I click one of them, first I divide them into two parts: the clicked one and the others. I\'m trying to se

Answer 1

Button btn;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);   
    setContentView(R.layout.main);  
    btn = (Button) findViewById(R.id.main_btn);  
    Drawable d = getResources().getDrawable(R.drawable.imagen);  
    d.setAlpha(60);  
    btn.setBackgroundDrawable(d);  
}

This works for me :)