属性动画

首先我们要在res下创建一个包   animator
把 set改成  objectanimator

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package com.example.animation;

import android.animation.Animator;
import android.animation.AnimatorInflater;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button alpha_bt;
    private Button translationY_bt;
    private Button scaleX_bt;
    private Button rotationY_bt;
    private Button AnimatorSet_bt;
    private ImageButton animation_iv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        Animator Xmlanimator = AnimatorInflater.loadAnimator(this, R.animator.object);
//      把要做动画控件对象放进去.Animator.setTarget(View对象);222
        Xmlanimator.setTarget(animation_iv);
//      开启动画.Animator.start.222
        Xmlanimator.start();
    }

    public void setImage(View view) {
        System.out.println("巴啦啦能量");
    }

    private void initView() {
        alpha_bt = (Button) findViewById(R.id.alpha_bt);
        translationY_bt = (Button) findViewById(R.id.translationY_bt);
        scaleX_bt = (Button) findViewById(R.id.scaleX_bt);
        rotationY_bt = (Button) findViewById(R.id.rotationY_bt);
        AnimatorSet_bt = (Button) findViewById(R.id.AnimatorSet_bt);
        animation_iv = (ImageButton) findViewById(R.id.animation_iv);

        alpha_bt.setOnClickListener(this);
        translationY_bt.setOnClickListener(this);
        scaleX_bt.setOnClickListener(this);
        rotationY_bt.setOnClickListener(this);
        AnimatorSet_bt.setOnClickListener(this);
        animation_iv.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.alpha_bt:
                //做透明动画,参数1:View,代表你要修改那个控件的属性. 参数2:propertyName代表实现什么样子的动画:"alpha",String类型.
                //参数3:float... values,控件修改的参数,new float[]{0.0f, 0.2f, 0.4f, 0.6f, 0.8f, 1.0f}
                ObjectAnimator alpha = ObjectAnimator.ofFloat(animation_iv, "alpha", new float[]{0.0f, 0.2f, 0.4f, 0.6f, 0.8f, 1.0f});
                //设置动画执行时长.setDuration
                alpha.setDuration(2000);
                //设置动画执行的模式setRepeatMode,参数用ObjectAnimator引用.
                alpha.setRepeatMode(ObjectAnimator.RESTART);
                //设置动画执行的次数.setRepeatCount
                alpha.setRepeatCount(1);
                //使用ObjectAnimator对象开启动画.
                alpha.start();

                break;
            case R.id.translationY_bt:
                //做旋转动画,"rotationY".rotationX,rotation  new float[]{90f, 180f, 270f, 360f}
                ObjectAnimator rotationY = ObjectAnimator.ofFloat(animation_iv, "rotationY", new float[]{90f, 180f, 270f, 360f});
                rotationY.setDuration(2000);
                rotationY.setRepeatMode(ObjectAnimator.RESTART);
                rotationY.setRepeatCount(1);
                rotationY.start();

                break;
            case R.id.scaleX_bt:
                //做缩放动画,scaleX,scaleY  new float[]{1f, 2f, 3f, 4f, 5f, 6f,1f}
                ObjectAnimator scaleX = ObjectAnimator.ofFloat(animation_iv, "scaleX", new float[]{1f, 2f, 3f, 4f, 5f, 6f, 1f});
                scaleX.setDuration(2000);
                scaleX.setRepeatMode(ObjectAnimator.RESTART);
                scaleX.setRepeatCount(1);
                scaleX.start();

                break;
            case R.id.rotationY_bt:
                //做平移动画,translationY,translationX new float[]{10f, 20f, 30f, 40f, 60f, 80f}
                ObjectAnimator translationY = ObjectAnimator.ofFloat(animation_iv, "translationY", new float[]{10f, 20f, 30f, 40f, 60f, 80f});
                translationY.setDuration(2000);
                translationY.setRepeatMode(ObjectAnimator.RESTART);
                translationY.setRepeatCount(1);
                translationY.start();

                break;
            case R.id.AnimatorSet_bt:
                //做动画集合AnimatorSet,分别创建两个动画对象.注意playTogether(动画对象...)和playSequentially的区别.最后开启动画.start
                AnimatorSet set = new AnimatorSet();
                ObjectAnimator oa = ObjectAnimator.ofFloat(animation_iv, "translationX", new float[]{10f, 20f, 30f, 40f, 60f, 80f});
                oa.setDuration(3000);
                ObjectAnimator oa2 = ObjectAnimator.ofFloat(animation_iv, "translationY", new float[]{-10f, -20f, -30f, -40f, -60f, -80f});
                oa2.setDuration(3000);
                set.playTogether(oa, oa2);
                set.start();

                break;
            case R.id.animation_iv:

                break;
        }
    }
}