扣丁学堂——Tween和Frame动画

一丶代码见本文

二丶效果演示（略）

都是常见的口述即可理解

三丶课程讲解

这一节的图片讲解讲解的相当清楚了，五个anim.xml对应五个效果，这里就直接复制anim.xml和MainActivity.java

平移

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:duration="3000" android:fromXDelta="0" android:fromYDelta="0"
        android:toXDelta="300" android:toYDelta="300"/>
</set>

缩放

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <scale android:fromXScale="0.0" android:fromYScale="0.0"
        android:toXScale="1.0" android:toYScale="1.0"
        android:fillAfter="false" android:duration="3000"
        android:pivotX="50%" android:pivotY="50%"/>
</set>

旋转

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <rotate android:duration="3000" android:fromDegrees="0" android:toDegrees="360"
        android:pivotY="50%" android:pivotX="50%"/>

</set>

切换

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="true">
    <item android:drawable="@mipmap/a" android:duration="300"/>
    <item android:drawable="@mipmap/b" android:duration="300"/>
    <item android:drawable="@mipmap/c" android:duration="300"/>
</animation-list>

透明度

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="3000"/>
</set>

MainActivity

public class MainActivity extends ActionBarActivity {

    ImageView iv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        iv = (ImageView) findViewById(R.id.imageView2);
    }

    public void click2(View view){
        AnimationDrawable ad = (AnimationDrawable) iv.getDrawable();
        ad.start();
//        ad.stop();
//
    }

    public void click(View view){

//        Animation alphaAnimation = new AlphaAnimation(0.0f,1.0f);

        //加载动画资源文件
        Animation alpha = AnimationUtils.loadAnimation(this, R.anim.alpha_anim);
        Animation scale = AnimationUtils.loadAnimation(this, R.anim.scale_anim);
        Animation translate = AnimationUtils.loadAnimation(this, R.anim.translate_anim);
        Animation rotate = AnimationUtils.loadAnimation(this, R.anim.rotate_anim);
        ImageView iv = (ImageView) view;
        //启动动画
        iv.startAnimation(rotate);
    }

}

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