slide_out.xml

    <?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="@android:integer/config_longAnimTime"
    android:fromXDelta="0%p"
    android:toXDelta="-100%p" >

</translate>

slide_in.xml

   <?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="@android:integer/config_longAnimTime"
    android:fromXDelta="100%p"
    android:toXDelta="0%p" >

</translate>

Java

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    switch(id) {
        // back button
        case android.R.id.home:
            finish();
            overridePendingTransition(R.anim.slide_enter, R.anim.slide_exit);
            return true;
    }

    return super.onOptionsItemSelected(item);
}