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Animation.AnimationListenerでいちいち3つもメソッドをimplするのは面倒くさい

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interface Animation.AnimationListener をimplementsすると onAnimationStart(), onAnimationRepeat(), onAnimationEnd() の3つのメソッドを実装しないといけないわけですが、このなかでよく使うのは onAnimationEnd() じゃないですか。
そこで以下の様な abstract class を定義して onAnimationEnd() だけ実装すればいいようにしているんですが、こんなもんですか。他にいい方法はありませんか。

import android.view.animation.Animation;

/**
 * The same as AnimationListener but only onAnimationEnd(Animation) is required to implement.
 */
public abstract class AnimationEndListener implements Animation.AnimationListener {

	abstract public void onAnimationEnd(Animation animation);

	@Override
	public void onAnimationRepeat(Animation animation) {
		// do nothing
	}

	@Override
	public void onAnimationStart(Animation animation) {
		// do nothing
	}
}
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