ButtonLive

Activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <Button
        android:id="@+id/clickMe"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Click me!" />

</RelativeLayout>

MainActivity.java

public class MainActivity extends Activity  {



    DecelerateInterpolator sDecelerator = new DecelerateInterpolator();

    OvershootInterpolator sOvershooter = new OvershootInterpolator(10f);



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);







                final Button clickMeButton = (Button) findViewById(R.id.clickMe);

                clickMeButton.animate().setDuration(200);



                clickMeButton.setOnTouchListener(new View.OnTouchListener() {



                    @Override

                    public boolean onTouch(View arg0, MotionEvent arg1) {

                        if (arg1.getAction() == MotionEvent.ACTION_DOWN) {

                            clickMeButton.animate().setInterpolator(sDecelerator).

                                    scaleX(.7f).scaleY(.7f);

                        } else if (arg1.getAction() == MotionEvent.ACTION_UP) {

                            clickMeButton.animate().setInterpolator(sOvershooter).

                                    scaleX(1f).scaleY(1f);

                        }

                        return false;

                    }

                });



            }

        }

DecelerateInterpolator  - An interpolator where the rate of change starts out quickly and and then decelerates.

OvershootInterpolator - An interpolator where the change flings forward and overshoots the last value then comes back.

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