Android: Custom "toggle button"

We will use an ImageView as a toggle button. Having two states, a normal one and one when its pressed and an action when it is pressed.

<ImageView
        ...
        android:clickable="true"
        android:src="@drawable/favorite_button_selector"
        android:onClick="favoriteClicked" />

res/drawable

<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    
    <item android:drawable="@drawable/favorite_active" android:state_selected="true"/>
    <item android:drawable="@drawable/favorite_inactive" android:state_selected="false"/>

</selector>

To make this work though we need to explicitly call setSelected(boolean) somewhere in your class. The best place to do so is probably in the onClick handler (favoriteClicked in this case).