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就是通过动画的方式改变对象的属性了，我们首先需要了解几个属性：

• Duration动画的持续时间，默认300ms。
• time interpolation：时间差值，如LinearInterpolator、AccelerateDecelerateInterpolator，定义动画的变化率。
• Repeat count and behavior：重复次数、以及重复模式；
• Animator sets: 动画集合，你可以定义一组动画，一起执行或者顺序执行。
• Frame refresh delay：帧刷新延迟，对于你的动画，多久刷新一次帧；默认为10ms，但最终依赖系统的当前状态；基本不用管。

相关的类：

• ObjectAnimator  动画的执行类
• ValueAnimator 动画的执行类
• AnimatorSet 用于控制一组动画的执行：线性，一起，每个动画的先后执行等。
• AnimatorInflater 用户加载属性动画的xml文件
• TypeEvaluator  类型估值，主要用于设置动画操作属性的值。
• TimeInterpolator 时间插值。

总的来说，属性动画就是，动画的执行类来设置动画操作的对象的属性、持续时间，开始和结束的属性值，时间差值等，然后系统会根据设置的参数动态的变化对象的属性。

下面是代码：

package com.lanxin.testanim2;

import android.animation.Animator;
import android.animation.AnimatorInflater;
import android.animation.ObjectAnimator;
import android.animation.PropertyValuesHolder;
import android.content.Context;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.AlphaAnimation;
import android.view.animation.AnimationSet;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "TestAnim2";
    Button but1,but2,but3,but4;
    TextView tv;
    ImageView iv;
    Context mContext;

    ObjectAnimator oa;
    AnimationSet as;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        
        findid();
        init();

    }

    private void init() {
        but4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                tv.setY(-100);
                PropertyValuesHolder pvhX = PropertyValuesHolder.ofFloat("x",0);
                PropertyValuesHolder pvhY = PropertyValuesHolder.ofFloat("y",0);
                oa = ObjectAnimator.ofPropertyValuesHolder(tv,pvhX,pvhY);
                oa.setDuration(3000);
                oa.setInterpolator(new AccelerateDecelerateInterpolator());
                oa.start();

                RotateAnimation ra = new RotateAnimation(0,359,iv.getWidth()/2,iv.getHeight()/2);
                ra.setDuration(800);
                ra.setRepeatCount(-1);
                ra.setFillAfter(false);
                ra.setInterpolator(new LinearInterpolator());
                as = new AnimationSet(true);
                as.addAnimation(ra);
                //as.setFillAfter(false);
                //as.setRepeatMode(1);
                //as.setRepeatCount(-1);
                iv.startAnimation(as);

            }
        });

        but3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Animator set  = AnimatorInflater.loadAnimator(mContext, R.animator.test1);
                set.setTarget(tv);
                set.start();
            }
        });
        but2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlphaAnimation aa;
                if(tv.getAlpha() == 0){
                    aa = new AlphaAnimation(0f,1f);
                }else {
                    aa = new AlphaAnimation(1f,0f);
                }

                aa.setDuration(2000);
                as = new AnimationSet(true);
                as.setFillBefore(true);
                as.setStartOffset(500);
                as.addAnimation(aa);
                tv.startAnimation(as);

                //移动动画
                TranslateAnimation ta = new TranslateAnimation(0,0,-100,0);
                ta.setDuration(3000);
                as = new AnimationSet(true);
                as.setFillBefore(true);
                as.addAnimation(ta);
                tv.startAnimation(as);

            }
        });

        but1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(tv.getAlpha() != 0){
                    oa = ObjectAnimator.ofFloat(tv,"alpha", 0.0f);
                    but1.setText(getString(R.string.but1_1));
                }else{
                    oa = ObjectAnimator.ofFloat(tv, "alpha", 1.0f);
                    but1.setText(getString(R.string.but1));
                }
                oa.setDuration(2000);
                oa.start();
                Log.i(TAG,"setOnClickListener");
            }
        });

    }

    private void findid() {
        but1 = (Button)findViewById(R.id.but1);
        but2 = (Button)findViewById(R.id.but2);
        but3 = (Button)findViewById(R.id.but3);
        but4 = (Button)findViewById(R.id.but4);
        tv = (TextView)findViewById(R.id.tv);
        iv = (ImageView)findViewById(R.id.load);
        mContext = this;

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

这里是代码下载网址：链接：http://pan.baidu.com/s/1mijKv12 密码：cvna