AnimationListener的问题

Question

我试图写一个漂亮的动画，但有困难。

在下面的代码中，它可以工作但不是我需要的那么多。第一个按钮显示动画，但第二个和第三个按钮显示动画。我做错了什么？

动画：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false" >
    <alpha
        android:duration="1000"
        android:fromAlpha="0.0"
        android:startOffset="0"
        android:toAlpha="1.0" >
    </alpha>
    <translate
        android:fromXDelta="-100%"
        android:duration="1000"
        android:toXDelta="0" />
</set>

我的代码：

public class PurchaseMenu extends Fragment implements View.OnClickListener {
    private int mAnimationsFinished = 0;
    private Button kitchenBtn;
    private Button hotelBtn;
    private Button engenerBtn;
    private Animation fallingAnimation;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.purchase_menu, null);
        fallingAnimation  = AnimationUtils.loadAnimation(getActivity(), R.anim.falling);
        kitchenBtn = (Button) v.findViewById(R.id.buttonKitchen);
        hotelBtn = (Button) v.findViewById(R.id.buttonHotel);
        engenerBtn = (Button) v.findViewById(R.id.buttonEngener);
        fallingAnimation .setAnimationListener(new Animation.AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {
                Log.d("mylognah", "start" + " " + mAnimationsFinished);
            }

            @Override
            public void onAnimationEnd(Animation animation) {

                if (mAnimationsFinished == 0) { //kitchenBtn animation ended
                    hotelBtn.setAnimation(fallingAnimation);
                } else if (mAnimationsFinished == 1) { //hotelBtn animation ended
                    engenerBtn.setAnimation(fallingAnimation);
                }
                mAnimationsFinished++; //This would be a member variable
                Log.d("mylognah", "finish" + " " + mAnimationsFinished);
            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });
        kitchenBtn.setAnimation(fallingAnimation);
        kitchenBtn.setOnClickListener(this);
        hotelBtn.setOnClickListener(this);
        engenerBtn.setOnClickListener(this);
        return v;
    }

    @Override
    public void onClick(View v) {

    }
}

Answer 1

更改这些行：

if (mAnimationsFinished == 0) { //kitchenBtn animation ended
                    hotelBtn.setAnimation(fallingAnimation);
                } else if (mAnimationsFinished == 1) { //hotelBtn animation ended
                    engenerBtn.setAnimation(fallingAnimation);
                }

到此：

if (mAnimationsFinished == 0) { //kitchenBtn animation ended
                    hotelBtn.startAnimation(fallingAnimation);
                } else if (mAnimationsFinished == 1) { //hotelBtn animation ended
                    engenerBtn.startAnimation(fallingAnimation);
                }

Answer 2

尝试使用startAnimation而不是setAnimation：

 @Override
            public void onAnimationEnd(Animation animation) {

                if (mAnimationsFinished == 0) { //kitchenBtn animation ended
                  kitchenBtn.clearAnimation();  
                  hotelBtn.startAnimation(fallingAnimation);
                } else if (mAnimationsFinished == 1) { //hotelBtn animation ended
                  hotelBtn.clearAnimation();   
                  engenerBtn.startAnimation(fallingAnimation);
                }
                mAnimationsFinished++; //This would be a member variable
                Log.d("mylognah", "finish" + " " + mAnimationsFinished);
            }

<强> setAnimation

设置要为此视图播放的下一个动画。但视图动画尚未开始。

<强> startAnimation

如果您想立即播放动画，请使用startAnimation。此方法允许对开始时间和失效进行细粒度控制，但您必须确保

1）动画设置了开始时间，

2）当动画应该开始时，视图将无效。