使用xml方式定义补间动画

在res下创建一个目录 anim目录

public class MainActivity extends Activity {

    private ImageView iv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //执行我们的动画
        iv = (ImageView) findViewById(R.id.iv);

        //设置一个点击事件
        iv.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(getApplicationContext(), "哈哈 你点不到我", 1).show();
            }
        });
    }

    //点击按钮 实现iv 透明的效果  动画
    public void click1(View v) {
        Animation aa = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.alpha);

        //iv开始执行动画
        iv.startAnimation(aa);

    }

    //点击按钮 实现iv 执行一个旋转 动画
    public void click2(View v) {
        Animation ra = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotate);

        //iv开始执行动画
        iv.startAnimation(ra);

    }

    //点击按钮进行一个缩放动画
    public void click3(View v) { 

        Animation sa= AnimationUtils.loadAnimation(getApplicationContext(), R.anim.scale);

        //iv开始执行动画
        iv.startAnimation(sa);
    }

    //位移动画
    public void click4(View v){
        Animation ta = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.translate);
         //开始动画
         iv.startAnimation(ta);
    }

    //动画一起飞
    public void click5(View v){
        Animation set = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.set);

        //最后一步 要记得 执行动画
        iv.startAnimation(set);

    }
}

alpha.xml

<?xml version="1.0" encoding="utf-8"?>
<alpha
    android:fromAlpha="1.0"
    android:toAlpha="0.0"
    android:duration="2000"
    android:repeatMode="reverse"
    android:repeatCount="1"
    xmlns:android="http://schemas.android.com/apk/res/android">

</alpha>

rotate.xml

<?xml version="1.0" encoding="utf-8"?>
<rotate
    android:fromDegrees="0"
    android:toDegrees="360"
    android:pivotX="50%"
    android:pivotY="50%"
    android:repeatCount="1"
    android:repeatMode="reverse"
    android:duration="2000"
    xmlns:android="http://schemas.android.com/apk/res/android">

</rotate>

scale.xml

<?xml version="1.0" encoding="utf-8"?>
<scale
    android:fromXScale="1.0"
    android:toXScale="2.0"
    android:fromYScale="1.0"
    android:toYScale="2.0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:repeatMode="reverse"
    android:repeatCount="1"
    android:duration="2000"
    xmlns:android="http://schemas.android.com/apk/res/android">

</scale>

translate.xml

<?xml version="1.0" encoding="utf-8"?>
<translate
    android:fromXDelta="0%p"
    android:toXDelta="0%p"
    android:fromYDelta="0%p"
    android:toYDelta="20%p"

    android:fillAfter="true"
    android:duration="2000"
    xmlns:android="http://schemas.android.com/apk/res/android">

</translate>

set.xml

<?xml version="1.0" encoding="utf-8"?>
<set>

    <alpha
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="2000"
        android:fromAlpha="1.0"
        android:repeatCount="1"
        android:repeatMode="reverse"
        android:toAlpha="0.0" >
    </alpha>

    <rotate
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="2000"
        android:fromDegrees="0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:repeatCount="1"
        android:repeatMode="reverse"
        android:toDegrees="360" >
    </rotate>

    <scale
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="2000"
        android:fromXScale="1.0"
        android:fromYScale="1.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:repeatCount="1"
        android:repeatMode="reverse"
        android:toXScale="2.0"
        android:toYScale="2.0" >
    </scale>

    <translate
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="2000"
        android:fillAfter="true"
        android:fromXDelta="0%p"
        android:fromYDelta="0%p"
        android:toXDelta="0%p"
        android:toYDelta="20%p" >
    </translate>

</set>