Animation Button

Step 1:

res/layout/Animation.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.evgenii.sixbouncingbuttons.MainActivity">

    <Button
        android:id="@+id/button_animate"
        android:layout_width="100dp"
        android:layout_height="40dp"
        android:onClick="didTapButton"
        android:background="#FFA400" />

</android.support.constraint.ConstraintLayout>

Step 2:

res/anim/animation.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <scale
        android:duration="2000"
        android:fromXScale="0.3"
        android:toXScale="1.0"
        android:fromYScale="0.3"
        android:toYScale="1.0"
        android:pivotX="50%"
        android:pivotY="50%" />
</set>

step 3:

following method use in your activity

method 1:
public void didTapButton(View view) {
    Button button = (Button)findViewById(R.id.button);
    final Animation myAnim = AnimationUtils.loadAnimation(this, R.anim.bounce);
    button.startAnimation(myAnim);
}
method 2:
class MyAnimation implements android.view.animation.Interpolator {
    private double mAmplitude = 1;
    private double mFrequency = 10;

    MyAnimation (double amplitude, double frequency) {
        mAmplitude = amplitude;
        mFrequency = frequency;
    }

    public float getInterpolation(float time) {
        return (float) (-1 * Math.pow(Math.E, -time/ mAmplitude) *
                Math.cos(mFrequency * time) + 1);
    }
}
method 3:
public void didTapButton(View view) {
    Button button = (Button)findViewById(R.id.button);
    final Animation myAnim = AnimationUtils.loadAnimation(this, R.anim.bounce);

    // Use bounce interpolator with amplitude 0.2 and frequency 20
    MyBounceInterpolator interpolator = new MyBounceInterpolator(0.2, 20);
    myAnim.setInterpolator(interpolator);

    button.startAnimation(myAnim);
}