Android编程中Tween动画和Frame动画实例分析

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
 <!-- 透明 -->
 <alpha
 android:fromAlpha="1"
 android:toAlpha="0"
 android:duration="3000"
 />
 <!-- 旋转 -->
 <rotate
 android:fromDegrees="0"
 android:toDegrees="360"
 android:pivotX="50%"
 android:pivotY="50%"
 android:duration="3000"
 />
 <!-- 缩放 -->
 <scale
 android:fromXScale="1"
 android:fromYScale="1"
 android:toXScale="3"
 android:toYScale="3"
 android:pivotX="0"
 android:pivotY="0"
 android:duration="3000"
 />
 <!-- 移动 -->
 <translate
 android:fromXDelta="0"
 android:fromYDelta="0"
 android:toXDelta="50%p"
 android:toYDelta="50%p"
 android:duration="3000"
 />
</set>

public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 imageView = (ImageView) findViewById(R.id.img);
}
public void onClick(View view) {
 Animation animation = null;
 switch (view.getId()) {
 case R.id.alpha:
  animation = AnimationUtils.loadAnimation(this, R.anim.alpha);
  break;
 case R.id.scale:
  animation = AnimationUtils.loadAnimation(this, R.anim.scale);
  break;
 case R.id.translate:
  animation = AnimationUtils.loadAnimation(this, R.anim.translate);
  break;
 case R.id.rotate:
  //animation = AnimationUtils.loadAnimation(this, R.anim.rotate);
  //令一种方式JavaCode中 创建RotateAnimation
  animation = new RotateAnimation(0, 180, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);
  animation.setDuration(3000);
  break;
 case R.id.all:
  animation = AnimationUtils.loadAnimation(this, R.anim.Tween);
  break;
 }
 //启动动画
 imageView.startAnimation(animation);
}

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false">
 <item android:drawable="@drawable/p1" android:duration="200" />
 <item android:drawable="@drawable/p2" android:duration="200" />
 <item android:drawable="@drawable/p3" android:duration="200" />
 <item android:drawable="@drawable/p4" android:duration="200" />
 <item android:drawable="@drawable/p5" android:duration="200" />
 <item android:drawable="@drawable/p6" android:duration="200" />
 <item android:drawable="@drawable/p7" android:duration="800" />
 <item android:drawable="@drawable/p8" android:duration="200" />
 <item android:drawable="@drawable/p9" android:duration="200" />
 <item android:drawable="@drawable/p10" android:duration="200" />
 <item android:drawable="@drawable/p11" android:duration="200" />
</animation-list>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >
 <ImageView
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:src="@anim/frame"
 android:onClick="go"
 />
</LinearLayout>

public void go(View view) {
 // 获取ImageView
 ImageView imageView = (ImageView) view;
 // 获取ImageView上面的动画图片
 AnimationDrawable drawable = (AnimationDrawable) imageView.getDrawable();
 // 动画开始
 drawable.start();
}