Android动画

Android动画

1. AlphaAnimation

   RelativeLayout rl_splash = (RelativeLayout) findViewById(R.id.rl_splash);
   //播放动画效果
   AlphaAnimation animation = new AlphaAnimation(1.0f, 0.0f);
   //设置Alpha动画的持续时间
   animation.setDuration(2000);
   //播放Alpha动画
   rl_splash.setAnimation(animation);

2. RotateAnimation

   java
//相对于自身的哪个位置旋转，这里是相对于自身的右下角
RotateAnimation ra = new RotateAnimation(0, 360, //从哪旋转，旋转多少度
Animation.RELATIVE_TO_SELF, 1.0f, Animation.RELATIVE_TO_SELF,
1.0f);
ra.setDuration(800);
ra.setRepeatCount(Animation.INFINITE);
ra.setRepeatMode(Animation.RESTART);
iv_scan.startAnimation(ra);


3. ScaleAnimation(缩放动画)

   ScaleAnimation(float fromX, float toX, float fromY, float toY) 
   Constructor to use when building a ScaleAnimation from code

4. TranslateAnimation(位移动画)

   TranslateAnimation(int fromXType, float fromXValue, int toXType, float toXValue, int fromYType, float fromYValue, int toYType, float toYValue) 
   Constructor to use when building a TranslateAnimation from code

5. AnimationSet (多组动画)

   ScaleAnimation sa = new ScaleAnimation(0.2f, 1.0f, 0.4f,1.0f);//缩放的动画效果,1.0f就代表窗体的总宽或者高
   sa.setDuration(400);
   TranslateAnimation ta = new TranslateAnimation(//位移动的动画效果
             Animation.RELATIVE_TO_SELF, 0,//指定这个位置是相对于谁
             Animation.RELATIVE_TO_SELF, 0.1f,
             Animation.RELATIVE_TO_SELF, 0,
             Animation.RELATIVE_TO_SELF, 0);
   ta.setDuration(300);
   AnimationSet set = new AnimationSet(false);//如果想播放多种动画的组合，这里就要用到了AnimationSet
   set.addAnimation(sa);
   set.addAnimation(ta);
   contentView.startAnimation(set); // 播放一组动画. 

6. Frame动画

   • 在drawable目录下新建一个xml文件，内容如下:

     <?xml version="1.0" encoding="utf-8"?>
     <animation-list xmlns:android="http://schemas.android.com/apk/res/android"
         android:oneshot="true" > //onshot是指定是否循环播放
         <item
             android:drawable="@drawable/desktop_rocket_launch_1"  //Frame动画的图片
             android:duration="50"/> //播放这个图片持续的时间
         <item
             android:drawable="@drawable/desktop_rocket_launch_2"
             android:duration="100"/>
     </animation-list>

   • 播放Frame动画

     AnimationDrawable rocketAnimation;
     public void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.main);
           ImageView rocketImage = (ImageView) findViewById(R.id.iv);
           rocketImage.setBackgroundResource(R.drawable.animlist); //将上边建的Frame动画的xml文件通过背景资源设置给图片
           rocketAnimation = (AnimationDrawable) rocketImage.getBackground();  //获取到图片的背景资源
     }
     public void start(View view) {
           if (!rocketAnimation.isRunning()) {
                rocketAnimation.start();  //播放
           }
     }

7. 保持动画播放完成后的状态animation.setFillAfter(true);

   Interpolator //定义了动画的变化速度，可以实现匀速、正加速、负加速、无规则变加速度
   AccelerateDecelerateInterpolator//先加速后减速。
   AccelerateInterpolator//逐渐加速。    
   LinearInterpolator//平稳不变的   
   DecelerateInterpolator//逐渐减速
   CycleInterpolator//曲线运动特效，要传递float型的参数。     
   animation.setInterpolator(new LinearInterpolator());//指定动画的运行效果

---

• 邮箱 ：charon.chui@gmail.com
• Good Luck!