Android动画之Interpolator和AnimationSet(三)
AnimationSet可以加入Animation,加入之后设置AnimationSet对加入的所有Animation都有效。
[java]
AnimationSet anim=new AnimationSet(true);
AlphaAnimation a=new AlphaAnimation(1,0);
RotateAnimation ra=new RotateAnimation(0, 720, Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF,0.5f);
anim.addAnimation(a);
anim.addAnimation(ra);
anim.setDuration(3000);
anim.setStartOffset(1000);
iv.startAnimation(anim);
AnimationSet anim=new AnimationSet(true);
AlphaAnimation a=new AlphaAnimation(1,0);
RotateAnimation ra=new RotateAnimation(0, 720, Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF,0.5f);
anim.addAnimation(a);
anim.addAnimation(ra);
anim.setDuration(3000);
anim.setStartOffset(1000);
iv.startAnimation(anim);
可以再xml文件中定义多个Animation,这样多个Animation可以一起运行
[html]
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_interpolator"
android:shareInterpolator="true"
>
<alpha
android:fromAlpha="1.0"
android:toAlpha="0.0"
android:startOffset="500"
android:duration="3000"
/>
<rotate
android:fromDegrees="0"
android:toDegrees="400"
android:pivotX="50%"
android:pivotY="50%"
android:duration="3000"
/>
</set>
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_interpolator"
android:shareInterpolator="true"
>
<alpha
android:fromAlpha="1.0"
android:toAlpha="0.0"
android:startOffset="500"
android:duration="3000"
/>
<rotate
android:fromDegrees="0"
android:toDegrees="400"
android:pivotX="50%"
android:pivotY="50%"
android:duration="3000"
/>
</set>
Interpolator可以定义动画播放的速度
在xml文件中定义Interpolator
android:interpolator="@android:anim/accelerate_interpolator"
android:shareInterpolator="true"
这样所有的Animation共用一个Interpolator。
在代码中用代码设置如下
anim.setInterpolator(new AccelerateInterpolator());
在new一个AnimationSet中传入true则所有的Animation共用Interpolator
补充:移动开发 , Android ,