How to set transparency of a background image Android xml file

Question

I have put an image in as the background of my android application with the following line of code:

 android:background=\"@drawable/background\"

Answer 1

You can set the alpha property:

android:alpha="0.4"

via code :

yourView.setAlpha(0.5f);

only the background :

yourView.getBackground().setAlpha(120);  // here the value is an integer not float