Activity transition animations like the Vine Android application. - See more at: http://blog.quent.in/index.php/2013/06/activity-transition-animations-like-the-vine-android-application/

activity_close_scale.xml

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android">

    <scale android:fromXScale="100%p"
          android:toXScale="80%p"
          android:fromYScale="100%p"
          android:toYScale="80%p"
          android:pivotX="50%p"
          android:pivotY="50%p"
          android:duration="@android:integer/config_mediumAnimTime" />

    <alpha android:fromAlpha="1"
          android:toAlpha="0.5"
          android:duration="@android:integer/config_mediumAnimTime"/>

</set>

activity_close_translate.xml

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android">

    <translate android:fromXDelta="0%"
               android:toXDelta="100%"
               android:duration="@android:integer/config_mediumAnimTime" />

</set>

activity_open_scale.xml

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android">

    <scale android:fromXScale="80%p"
          android:toXScale="100%p"
          android:fromYScale="80%p"
          android:toYScale="100%p"
          android:pivotX="50%p"
          android:pivotY="50%p"
          android:duration="@android:integer/config_mediumAnimTime" />

    <alpha android:fromAlpha="0.5"
          android:toAlpha="1.0"
          android:duration="@android:integer/config_mediumAnimTime"/>

</set>

activity_open_translate.xml

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android">

    <translate android:fromXDelta="100%"
               android:toXDelta="0%"
               android:duration="@android:integer/config_mediumAnimTime" />

</set>

AnimatedActivity.java

public class AnimatedActivity extends Activity
{
  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    //opening transition animations
    overridePendingTransition(R.anim.activity_open_translate,R.anim.activity_close_scale);
  }

  @Override
  protected void onPause()
  {
    super.onPause();
    //closing transition animations
    overridePendingTransition(R.anim.activity_open_scale,R.anim.activity_close_translate);
  }
}