Android animation XML issues
The animation attributes are relative to where they are when they start. This is probably a lot closer to what you want:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:shareInterpolator="true">
<translate
android:fromXDelta="40%p" android:toXDelta="90%p"
android:fromYDelta="10%p" android:toYDelta="40%p"
android:duration="500" android:startOffset="0"/>
<translate
android:fromXDelta="0%p" android:toXDelta="-50%p"
android:fromYDelta="0%p" android:toYDelta="50%p"
android:duration="500" android:startOffset="500"/>
<translate
android:fromXDelta="0%p" android:toXDelta="-30%p"
android:fromYDelta="0%p" android:toYDelta="-50%p"
android:duration="500" android:startOffset="1000"/>
<translate
android:fromXDelta="0%p" android:toXDelta="30%p"
android:fromYDelta="0%p" android:toYDelta="-30%p"
android:duration="500" android:startOffset="1500"/>
</set>