【转】animation-list旋转的地球以及Timer的使用

转自：http://dev.10086.cn/cmdn/wiki/index.php?doc-view-3708.html

用到animation-list其实就是帧叠加 ，通常要注意两个问题

1.一般布局要用在frameLayout

2.它呢一般作为背景 然后在取出来

public class EarthAnimationActivity extends Activity {

private static final String TAG = "EarthAnimationActivity";

protected static final int FORWARD = 0;
protected static final int REVERSE = 1;

private Button earthButton;

private AnimationDrawable earthButtonAnimation;

protected int direction;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);

earthButton = (Button) findViewById(R.id.earth_button);
earthButtonAnimation = (AnimationDrawable) earthButton.getBackground();
direction = FORWARD;

earthButton.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
if ( ! earthButtonAnimation.isRunning() ) {
earthButtonAnimation.start();
earthButton.setText(R.string.click_me_to_stop);
}
else {
earthButtonAnimation.stop();
int resId = R.anim.earth_animation_rev;
if ( direction == FORWARD ) {
direction = REVERSE;
}
else {
resId = R.anim.earth_animation;
direction = FORWARD;
}
earthButton.setBackgroundResource(resId);
earthButtonAnimation = (AnimationDrawable) earthButton.getBackground();
earthButton.setText(R.string.click_me_to_start);
}
}

});
}

/* (non-Javadoc)
* @see Android.app.Activity#onResume()
*/
@Override
protected void onResume() {
super.onResume();

(new Timer(false)).schedule(new AnimationTimer(earthButtonAnimation), 100);
}

/* (non-Javadoc)
* @see android.app.Activity#onPause()
*/
@Override
protected void onPause() {
super.onPause();
earthButtonAnimation.stop();
}

private static class AnimationTimer extends TimerTask {
AnimationDrawable animation;

public AnimationTimer(AnimationDrawable animation) {
this.animation = animation;
}

@Override
public void run() {
animation.start();
this.cancel();
}

}

}

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:id="@+id/frame_layout"
android:background="@drawable/space_background">

<Button android:id="@+id/earth_button" android:background="@anim/earth_animation"
android:text="@string/click_me_to_stop" android:layout_gravity="center"
android:textStyle="bold" android:textColor="#ff9900"
android:layout_marginBottom="12dip" android:layout_marginRight="12dip"
android:layout_marginTop="12dip" android:maxHeight="296dip"
android:maxWidth="296dip" android:layout_height="wrap_content"
android:layout_width="wrap_content" android:width="296dip"
android:height="296dip" android:layout_marginLeft="-10dip"
android:textSize="24dip"></Button>

</FrameLayout>

上面主vxml

下面是地球的正反旋转

<?xml version="1.0" encoding="UTF-8"?>
<!-- Animation frames for earth -->
<!--  android:id="@+id/earth_animation" -->
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false" android:visible="true">
<item android:drawable="@drawable/earth0" android:duration="150" />
<item android:drawable="@drawable/earth1" android:duration="150" />
<item android:drawable="@drawable/earth2" android:duration="150" />
<item android:drawable="@drawable/earth3" android:duration="150" />
<item android:drawable="@drawable/earth4" android:duration="150" />
<item android:drawable="@drawable/earth5" android:duration="150" />
<item android:drawable="@drawable/earth6" android:duration="150" />
<item android:drawable="@drawable/earth7" android:duration="150" />
<item android:drawable="@drawable/earth8" android:duration="150" />
<item android:drawable="@drawable/earth9" android:duration="150" />
</animation-list>

<?xml version="1.0" encoding="UTF-8"?>
<!-- Animation frames for earth -->
<!--  android:id="@+id/earth_animation_rev" -->
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false" android:visible="true">
<item android:drawable="@drawable/earth9" android:duration="150" />
<item android:drawable="@drawable/earth8" android:duration="150" />
<item android:drawable="@drawable/earth7" android:duration="150" />
<item android:drawable="@drawable/earth6" android:duration="150" />
<item android:drawable="@drawable/earth5" android:duration="150" />
<item android:drawable="@drawable/earth4" android:duration="150" />
<item android:drawable="@drawable/earth3" android:duration="150" />
<item android:drawable="@drawable/earth2" android:duration="150" />
<item android:drawable="@drawable/earth1" android:duration="150" />
<item android:drawable="@drawable/earth0" android:duration="150" />
</animation-list>