自定义动画播放

1.新建一anim文件夹，里面建立一myanim.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <alpha 
        android:fromAlpha="0.1"
        android:toAlpha="1.0"
        android:duration="2000"
        />   <!-- 透明度的转换 -->
        
     <scale 
            android:interpolator="@android:anim/accelerate_decelerate_interpolator"
            android:fromXScale="0.0"
            android:toXScale="1.4"
            android:fromYScale="0.0"
            android:toYScale="1.4"
            android:pivotX="50%"
            android:pivotY="50%"
            android:fillAfter="false"
            android:duration="3000"
            />   <!-- 尺寸的变换 -->
         
    <translate 
        android:fromXDelta="30"
        android:toXDelta="0"
        android:fromYDelta="30"
        android:toYDelta="50"
        android:duration="3000"
        />          <!-- 位置的变换 -->
        
    <rotate 
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:fromDegrees="0"
        android:toDegrees="+350"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="3000"
        />    <!-- 旋转变换 -->

</set>

 2.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="wyf.ytl.MainActivity" >

  <ImageView 
      android:id="@+id/myImageView"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:src="@drawable/img"
      />

</LinearLayout>

 3.

public class MainActivity extends ActionBarActivity {

  Animation myAnimation = null;
  ImageView myImageView = null;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //加载动画
    myAnimation = AnimationUtils.loadAnimation(this, R.anim.myanim);
    myImageView = (ImageView) findViewById(R.id.myImageView);
    //启动动画
    myImageView.startAnimation(myAnimation);
  }