Android动画（2）视图动画

简介

java中

//透明度动画
public void alpha(View view){
AlphaAnimation  aa = new AlphaAnimation(0.0f, 1.0f);
aa.setDuration(2000);
aa.setRepeatCount(1); //重复次数
aa.setRepeatMode(Animation.REVERSE);//重复模式
aa.setFillAfter(true);//动画后是否保持
iv.startAnimation(aa);
}

//位移动画
public void trans(View view){
TranslateAnimation ta = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -0.5f,
Animation.RELATIVE_TO_PARENT, 0.5f,
Animation.RELATIVE_TO_PARENT, 0.0f,
Animation.RELATIVE_TO_PARENT, 0.0f);
ta.setDuration(2000);
ta.setRepeatCount(1);
ta.setRepeatMode(Animation.REVERSE);
iv.startAnimation(ta);
}
//缩放动画
public void scale(View view){
ScaleAnimation sa = new ScaleAnimation(0.1f, 2.0f, 0.1f, 2.0f, Animation.RELATIVE_TO_SELF,
0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
sa.setDuration(2000);
sa.setRepeatCount(1);
sa.setRepeatMode(Animation.REVERSE);
iv.startAnimation(sa);
}

//旋转动画
public void rotate(View view){
RotateAnimation ra = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF,
0.0f, Animation.RELATIVE_TO_SELF, 0.0f);
ra.setDuration(2000);
ra.setRepeatCount(1);
ra.setRepeatMode(Animation.REVERSE);
iv.startAnimation(ra);
}

//动画组合
public void set(View view){
AnimationSet set = new AnimationSet(false);
TranslateAnimation ta = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -0.5f,
Animation.RELATIVE_TO_PARENT, 0.5f,
Animation.RELATIVE_TO_PARENT, -0.5f,
Animation.RELATIVE_TO_PARENT, 0.5f);
ta.setDuration(2000);
ta.setRepeatCount(1);
ta.setRepeatMode(Animation.REVERSE);
ScaleAnimation sa = new ScaleAnimation(0.1f, 2.0f, 0.1f, 2.0f, Animation.RELATIVE_TO_SELF,
0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
sa.setDuration(2000);
sa.setRepeatCount(1);
sa.setRepeatMode(Animation.REVERSE);
RotateAnimation ra = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF,
0.0f, Animation.RELATIVE_TO_SELF, 0.0f);
ra.setDuration(2000);
ra.setRepeatCount(1);
ra.setRepeatMode(Animation.REVERSE);
set.addAnimation(ra);
set.addAnimation(ta);
set.addAnimation(sa);
iv.startAnimation(set);
}

XML中

alpha.xml

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

rotate.xml

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

</rotate>

scale.xml

<?xml version="1.0" encoding="utf-8"?>
<scale xmlns:android="http://schemas.android.com/apk/res/android"
android:fromXScale="0.1"
android:toXScale="2.0"
android:fromYScale="0.1"
android:toYScale="2.0"
android:duration="2000"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="1"
android:repeatMode="reverse" >

</scale>

trans.xml

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
android:fromXDelta="-50%p"
android:toXDelta="50%p"
android:fromYDelta="0"
android:toYDelta="0"
android:duration="2000"
android:repeatCount="1"
android:repeatMode="reverse"
>

</translate>

set.xml

<set>

<alpha
xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="2000"
android:fillAfter="true"
android:fromAlpha="0.0"
android:repeatCount="1"
android:repeatMode="reverse"
android:toAlpha="1.0" >
</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="0.1"
android:fromYScale="0.1"
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:fromXDelta="-50%p"
android:fromYDelta="0"
android:repeatCount="1"
android:repeatMode="reverse"
android:toXDelta="50%p"
android:toYDelta="0" >
</translate>

</set>

开启动画：

//旋转动画
public void rotate(View view){
Animation ra = AnimationUtils.loadAnimation(this, R.anim.rotate);
iv.startAnimation(ra);
}
//动画组合
public void set(View view){
Animation set = AnimationUtils.loadAnimation(this, R.anim.set);
iv.startAnimation(set);
}