I have a layer list object, it contain two images, one is background, and the other is a rotation disk image which will be raotated at the top of the background image. i.e. I use this layer-list as a linearlayout background, and I only want to animate "disk_bg" item of the layer-list;
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/
android">
<item android:drawable="@drawable/player_bg" />
<item android:top="166dp" >
<bitmap android:id="@+id/disk_bg" android:src="@drawable/cd"
android:gravity="center" />
</item>
I use this layer-list as a layout background, do you know how can I animate the disk_bg layer in my application?
can you help me, many thanks to you~
don't you get my question? or there is no way to do that?
First create 2(or more) layer-list resources ie *layer_frame1.xml* and *layer_frame2.xml* , where you set your frames. In your case let's say changing the android:top of the disk item.
Then create an animation-list resource where you set the timing and order of the frames :
<?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/layer_frame1"
android:duration="100"/>
<item
android:drawable="@drawable/layer_frame2"
android:duration="100"/>
</animation-list>
Save it in a file ie *drawable/player_animation.xml* and set it as background on a View
<View
android:id="@+id/animation_test"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/player_animation" />
Finally in your code just say when you want the animation start.
((AnimationDrawable)findViewById(R.id.animation_test).getBackground()).start();
Watch out do not start the animation inside onCreate() method.
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