Android学习—动画（旋转动画）

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <set xmlns:android="http://schemas.android.com/apk/res/android">
 3 
 4     <!--
 5         pivotX:动画旋围绕点的X轴位置 pivotY：动画旋转围绕点的Y轴位置 50%是中心
 6         fromDegress：动画开始的初始角度
 7         toDegrees：动画结束的角度
 8     -->
 9     <rotate
 10         android:fromDegrees="180"
 11         android:toDegrees="360"
 12         android:duration="2000"
 13         android:repeatCount="2"
 14         />
 15 </set>

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
 3     android:layout_height="match_parent"
 4     tools:context="com.test2_23.test2_23.xml_RotateActivity">
 5     <ImageView
 6         android:id="@+id/rotate_xml_img"
 7         android:src="@drawable/img_bird"
 8         android:layout_width="wrap_content"
 9         android:layout_height="wrap_content" />
10 </RelativeLayout>

 1 public class xml_RotateActivity extends Activity {
 2 
 3     @Override
 4     protected void onCreate(Bundle savedInstanceState) {
 5         super.onCreate(savedInstanceState);
 6         setContentView(R.layout.activity_xml__rotate);
 7         ImageView img = (ImageView) findViewById(R.id.rotate_xml_img);
 8         Animation animation = AnimationUtils.loadAnimation(this,R.anim.animtation_rotate);
 9         img.clearAnimation();
10         img.startAnimation(animation);
11     }
12 }