android - How to highlight a button when is pressed?

Question

I'm making an Andorid quiz and I want to highlight a button when it's clicked but when the user lets go of the button that it turns in it original colour. You see I've set the background of the button so the buttons can be rounded. I've set that in drawable.

<Button
    android:id="@+id/btn1"
    android:background="@drawable/roundedbutton"
    android:textColor="#ffffff"
    android:textStyle="italic"
    android:layout_width="225sp"
    android:layout_marginTop="23sp"
    android:layout_height="38sp"
    android:layout_alignLeft="@+id/btn2"
    android:layout_below="@+id/textView1"
    android:text="Button" />

roundedbutton.xml

<?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
 android:shape="rectangle" android:padding="10dp">   
<solid android:color="#848482"/> <!-- this one is ths color of the Rounded Button -->

<corners
android:bottomRightRadius="6.5dp"
android:bottomLeftRadius="6.5dp"
android:topLeftRadius="6.5dp"
android:topRightRadius="6.5dp"/>
</shape>

Answer 1

You can use OnTouchListener or you can use a selector.

button.setOnTouchListener(new OnTouchListener() {

@Override
public boolean onTouch(View v, MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
            // change color
    }
    else if (event.getAction() == MotionEvent.ACTION_UP) {
            // set to normal color
    }

    return true;
}
});

You can use a selector also. Borders and rounded rectangle. Customize the same.

bkg.xml in drawable folder

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" 
        android:drawable="@drawable/pressed" />
    <item  android:state_focused="false" 
        android:drawable="@drawable/normal" />
</selector>

normal.xml in drawable folder

<?xml version="1.0" encoding="UTF-8"?> 
  <shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle"> 
  <solid android:color="#0AECBF"/>    
  <stroke android:width="3dp"
        android:color="#0FECFF" /> 
  <padding android:left="5dp"
         android:top="5dp"
         android:right="5dp"
         android:bottom="5dp"/> 
  <corners android:bottomRightRadius="7dp"
         android:bottomLeftRadius="7dp" 
         android:topLeftRadius="7dp"
         android:topRightRadius="7dp"/> 
  </shape>  

pressed.xml in drawable folder

<?xml version="1.0" encoding="UTF-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
   <solid android:color="#ff33ffff" />
 <padding android:left="5dp"
             android:top="5dp"
             android:right="5dp"
             android:bottom="5dp"/> 
    <corners android:bottomRightRadius="7dp"
             android:bottomLeftRadius="7dp" 
             android:topLeftRadius="7dp"
             android:topRightRadius="7dp"/> 
</shape>

Now set the background fro your button in xml

     android:background="@drawable/bkg"