首先在res中新建一个anim的文件夹
在anim中新建需要的动画xml资源文件(这里我把四个都写出来)
anim/alpha.xml(渐变动画)
duration:动画的持续时间(单位是毫秒)
fromAlpha:开始的透明度
toAlpha:结束的透明度
透明度0.0是完全透明,1.0是不透明
anim/scale(伸缩动画)
1 2 3 4 5 6 7 8 9 10 11 12 | <? xml version = "1.0" encoding = "UTF-8" ?> < set xmlns:android = "http://schemas.android.com/apk/res/android" > < scale android:duration = "2000" android:fromXScale = "0.0" android:fromYScale = "0.0" android:interpolator = "@android:anim/accelerate_decelerate_interpolator" android:pivotX = "00%" android:pivotY = "00%" android:toXScale = "1.4" android:toYScale = "1.4" /> </ set > |
interpolator:动画插入器。
accelerate_decelerate_interpolator:加速-减速
accelerate_interpolator:加速
decelerate_interpolator:减速
fromXScale,fromYScale:开始X和Y的大小(0为缩小到没有)
toXScale,toYScale:结束X和Y的大小(1为没有变化)
pivotX,privotY:左上角的坐标(可以用百分比也可以用数字)
anim/translate(移动动画)
toXDelta,toYDelta:结束时候左上角的坐标
anim/rotate(旋转动画的)
1 2 3 4 5 6 7 8 9 | < span style = "font-size:9pt;line-height:1.5;" ><? xml version = "1.0" encoding = "utf-8" ?></ span > < set xmlns:android = "http://schemas.android.com/apk/res/android" > < rotate android:duration = "3000" android:fromDegrees = "0" android:interpolator = "@android:anim/accelerate_decelerate_interpolator" android:pivotX = "50%" android:pivotY = "50%" android:toDegrees = "+360" /> </ set > < span ></ span >< span ></ span > |
interpolator:动画插入器。
accelerate_decelerate_interpolator:加速-减速
accelerate_interpolator:加速
decelerate_interpolator:减速
fromDegrees:开始的角度
toDegrees:结束的角度
pivotX,privotY:旋转中心的坐标(可以用百分比也可以用数字)
到此xml资源文件就完成了,接下来就是如何调用这些资源文件。
以alpha.xml为例子,先建立AlphaActivity
activity_alpha.xml
AlphaActivity.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | package com.example.animationdemo; import android.os.Bundle; import android.app.Activity; import android.view.View; import android.view.animation.Animation; import android.view.animation.Animation.AnimationListener; import android.view.animation.AnimationUtils; import android.widget.Toast; public class AlphaActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); View view=View.inflate( this , R.layout.activity_alpha, null ); setContentView(view); Animation animation=AnimationUtils.loadAnimation( this , R.anim.alpha); view.startAnimation(animation); animation.setAnimationListener( new AnimationListener() { @Override public void onAnimationStart(Animation arg0) {} @Override public void onAnimationRepeat(Animation arg0) {} @Override public void onAnimationEnd(Animation arg0) { Toast.makeText(AlphaActivity. this , "动画完成" , Toast.LENGTH_SHORT).show(); } }); } } |
通过在http://www.eoeandroid.com/forum.php?mod=viewthread&tid=564学习后写出这篇博文
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