One approach is to create an XML file like this in drawable
, called whatever.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_focused="true"
android:state_pressed="true"
android:drawable="@drawable/bgalt" />
<item
android:state_focused="false"
android:state_pressed="true"
android:drawable="@drawable/bgalt" />
<item android:drawable="@drawable/bgnorm" />
</selector>
bgalt
and bgnorm
are PNG images in drawable.
If you create the buttons programatically in your activity, you can set the background with:
final Button b = new Button (MyClass.this);
b.setBackgroundDrawable(getResources().getDrawable(R.drawable.whatever));
If you set your buttons’ style with an XML, you would do something like:
<Button
android:id="@+id/mybutton"
android:background="@drawable/watever" />
And finally a link to a tutorial.
Hope this helps.