View Animation 视图动画全解

先看一下图：

一 res/anim/目录下新建xml文件

1.alpha （透明度）标签：va_alpha.xml

<?xml version="1.0" encoding="utf-8"?>
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
       android:duration="4000"
       android:fromAlpha="0.0"
       android:toAlpha="1.0">
</alpha>

2.scale（缩放） 标签：va_scale.xml

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

<scale xmlns:android="http://schemas.android.com/apk/res/android"
       android:duration="1000"
       android:fromXScale="1.0"
       android:fromYScale="1.0"
       android:pivotX="0%"
       android:pivotY="0%"
       android:toXScale="0.5"
       android:toYScale="0.5"

       android:fillAfter="true"
       android:repeatCount="1"
       android:startOffset="1000"

    />

3.rotate（旋转）标签：va_rotate.xml

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
        android:duration="1000"
        android:pivotX="50%"
        android:pivotY="0%"
        android:fromDegrees="-40"
        android:toDegrees="40"
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"

        android:repeatMode="reverse"
        android:repeatCount="-1"
    />

4.translation（移动）标签：va_translation.xml

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

<translate xmlns:android="http://schemas.android.com/apk/res/android"
           android:fromXDelta="0%"
           android:fromYDelta="0"
           android:toXDelta="100%p"
           android:toYDelta="0"
           android:duration="2000"
    />

5.set（动画集）标签：va_set.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
     android:duration="1000"
     android:fillAfter="true">

    <scale xmlns:android="http://schemas.android.com/apk/res/android"
           android:fromXScale="1.0"
           android:fromYScale="1.0"
           android:pivotX="0%"
           android:pivotY="0%"
           android:toXScale="0.5"
           android:toYScale="0.5"/>

    <rotate xmlns:android="http://schemas.android.com/apk/res/android"
            android:fromDegrees="0"
            android:pivotX="50%"
            android:pivotY="50%"
            android:toDegrees="360"/>
</set>

二   res/layout/布局文件添加

<ImageView
    android:id="@+id/test_iv"
    android:layout_gravity="center"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/rotate"/>

三  代码使用：

//mIvTest.startAnimation(AnimationUtils.loadAnimation(MainActivity.this, R.anim.va_alpha));
//mIvTest.startAnimation(AnimationUtils.loadAnimation(MainActivity.this, R.anim.va_scale));
//mIvTest.startAnimation(AnimationUtils.loadAnimation(MainActivity.this, R.anim.va_translate));
 mIvTest.startAnimation(AnimationUtils.loadAnimation(MainActivity.this, R.anim.va_rotate));
//mIvTest.startAnimation(AnimationUtils.loadAnimation(MainActivity.this, R.anim.va_set));

效果：依次：alpha、scale、rotate、translation、set