Drawing animations with animation

Animation drawing Concentric Circles

Here is an animation-related detailed introduction

Http://developer.android.com/intl/zh-cn/guide/topics/resources/animation-resource.html

There are a few things to note when implementing frame animations:

1) Frame animations cannot be automatically scaled down according to the size of your view settings

2) Each frame size needs to define the same size

Instance:

1. Implement picture frame in drawable (simple two frame is realized here)

The contents of the Frame0.xml are as follows:

<?xml version="1.0" encoding="Utf-8"?>

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

<item>

<shape android:shape="Oval">

<solid android:color="@android: color/transparent" />

<size android:width="200DP" android:height="200DP"/>

</shape>

</item>

<item android:bottom="56DP"

android:left="56DP"

android:right="56DP"

android:top="56DP">

<shape android:shape="Oval">

<solid android:color="#FF16ae2b" />

</shape>

</item>

</layer-list>

The contents of the Frame1.xml are as follows:

<?xml version="1.0" encoding="Utf-8"?>

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

<!--inner shadow of Outer circle--

<item>

<shape android:shape="Oval">

<solid android:color="@android: color/transparent" />

<size android:width="200DP" android:height="200DP"/>

</shape>

</item>

<item

android:bottom="36DP"

android:left="36DP"

android:right="36DP"

android:top="36DP">

<shape android:shape="Oval">

<stroke android:width="2DP " android:color= "#cF16ae2b" />

<solid android:color="@android: color/transparent" />

</shape>

</item>

<item

android:bottom="48DP"

android:left="48DP"

android:right="48DP"

android:top="48DP">

<shape android:shape="Oval">

<stroke android:width="2DP " android:color= "#FF16ae2b" />

<solid android:color="@android: color/transparent" />

</shape>

</item>

<item

android:bottom="56DP"

android:left="56DP"

android:right="56DP"

android:top="56DP">

<shape android:shape="Oval">

<solid android:color="#FF16ae2b" />

</shape>

</item>

</layer-list>

2. Implement animation in Res/anim

The contents of the Anim0.xml are as follows:

<?xml version="1.0" encoding="Utf-8"?>

<animation-list xmlns:android="http://schemas.android.com/apk/res/android">

<item android:drawable="@drawable/FRAME0" android:duration=" />"

<item android:drawable="@drawable/frame1" android:duration=" />"

</animation-list>

3. Code implementation
Private animationdrawable showdrawable = null;

protected void OnCreate (bundlesavedinstancestate) {

Super.oncreate (savedinstancestate);

Setcontentview (R.layout.activity_main);

Showdrawable= (animationdrawable) context.getresources (). getdrawable (R.ANIM.ANIM0);

Showdrawable.setoneshot (TRUE);

This.setbackgrounddrawable (showdrawable); put it in a view

}

Drawing animations with animation