如何动画层列表一个项目 [英] how to animate one item of layer-list
问题描述
我有一个图层列表对象,它包含两个图像,一个是背景, 另一种是,将在被raotated旋转磁盘映像 背景图像的顶部。比如我用这层列表作为的LinearLayout的背景下, 我只想动画层列表disk_bg项目;
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>
我用这层列表作为布局的背景,你知道我怎么能在我的应用动画disk_bg层?
I use this layer-list as a layout background, do you know how can I animate the disk_bg layer in my application?
你能帮助我,非常感谢你〜
can you help me, many thanks to you~
你不去找我的问题?或者有没有办法做到这一点?
don't you get my question? or there is no way to do that?
推荐答案
首先创建2个(或以上)层列表资源即* layer_frame1.xml *和* layer_frame2.xml *,你设置你的帧。在你的情况让我们说改变了android:顶盘项目
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.
然后创建你设置帧的时间及次序动画列表资源:
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>
将其保存在一个文件,即*绘制/ player_animation.xml *并将其设置为背景的一个视图
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" />
最后,在你的code只是说,当你想要的动画开始。
Finally in your code just say when you want the animation start.
((AnimationDrawable)findViewById(R.id.animation_test).getBackground()).start();
当心不要启动动画里面的的onCreate()的方法。
Watch out do not start the animation inside onCreate() method.
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