listener - Android: how add opacity on ImageButton click? -


i thought use ontouchlistener , tracking down , events, setting alpha value, have add listener imagebuttons (they lot). wonder if there shortcut achieve result.

in case when user click on button , cause change opacity of button can do:

in xml file on button declaration add line:

android:onclick = "clickmethod"

and in java file need implement clickmethod,

public void clickmethod(view view) {   // change opacity }

so, if want same process(change button opacity) each button, in xml file each button add line

android:onclick="clickmethod"

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