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