Android动画工具封装-优快云博客

（重要）一个动画相关的git地址：https://github.com/daimajia/AndroidViewAnimations

demo下载地址：http://download.youkuaiyun.com/detail/android_zhengyongbo/9871490

1.先上工具类

import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.view.View;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by zhengyongbo on 2017/6/15.
 */

public class AnimationUtil {
    private static AnimationUtil instance;
    private  List<ObjectAnimator> animators;
    private  AnimatorSet mAnimatorSet;

    public static AnimationUtil getInstance() {
        if(null==instance) {
            synchronized (AnimationUtil.class) {
                if (null==instance ) {
                    instance = new AnimationUtil();
                }
            }
        }
        return instance;
    }
    public  void init() {
        animators = new ArrayList<>();
        mAnimatorSet = new AnimatorSet();
    }

     public List<ObjectAnimator> getAnimators() {
        return animators;
    }

    // 停止动画
    public void stopAnimation() {
        try {
            if (mAnimatorSet != null) {
                mAnimatorSet.cancel();
                if (animators.size() > 0) {
                    for (int i = 0; i < animators.size(); i++) {
                        animators.get(i).cancel();
                    }
                    animators.clear();
                }
            }
        } catch (Exception e) {

        }
    }

    /**
     * target: View animators： 动画，可以是一个效果，也可以多个效果，这些效果依次顺序执行 duration：多长时间内动画执行完
     * repeatCount:动画循环播放次数
     */
    public void startAnimation(View target, List<ObjectAnimator> animators, long duration, int repeatCount) {
        try {
            if (animators.size() <= 0) {
                return;
            }
            for (int i = 0; i < animators.size(); i++) {
                // 动画效果不限，依次执行
                mAnimatorSet.playTogether(animators.get(i));
                // 设置动画循环播放次数
                animators.get(i).setRepeatCount(repeatCount);
            }
            // 设置动画再多长时间内播完
            mAnimatorSet.setDuration(duration);
            // 开始动画
            mAnimatorSet.start();
        } catch (Exception e) {

        }
    }

}

2.使用


import android.animation.ObjectAnimator;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {
    private ImageView imageView;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = (ImageView) findViewById(R.id.tv);

//      https://github.com/daimajia/AndroidViewAnimations
//      根据上面的项目改编，需要的animator参数在上面查找
        AnimationUtil.getInstance().init();
//       添加动画效果参数，可以是一个也可以是多个
        ObjectAnimator animator = ObjectAnimator.ofFloat(imageView, "scaleX", 1, 1.25f, 0.75f, 1.15f, 1);
        AnimationUtil.getInstance().getAnimators().add(animator);
        ObjectAnimator animator1 = ObjectAnimator.ofFloat(imageView, "scaleY", 1, 0.75f, 1.25f, 0.85f, 1);
        AnimationUtil.getInstance().getAnimators().add(animator1);
//      开始动画
        AnimationUtil.getInstance().startAnimation(imageView,AnimationUtil.getInstance().getAnimators(), 1200, 9);

        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
//               停止动画
                AnimationUtil.getInstance().stopAnimation();
            }
        });
    }


}