Android编程实现自定义进度条颜色的方法

本文实例讲述了android编程实现自定义进度条颜色的方法。分享给大家供大家参考，具体如下：

android 自定义进度条颜色

先看图

基于产品经理各种自定义需求，经过查阅了解，下面是自己对android自定义进度条的学习过程！

这个没法了只能看源码了，还好下载了源码， sources\base\core\res\res\  下应有尽有，修改进度条颜色只能找progress ,因为是改变样式，首先找styles.xml
找到xml后，进去找到

<style name="widget.progressbar"> 
    <item name="android:indeterminateonly">true</item> 
    <item name="android:indeterminatedrawable">@android:drawable/progress_medium_white</item> 
    <item name="android:indeterminatebehavior">repeat</item> 
    <item name="android:indeterminateduration">3500</item> 
    <item name="android:minwidth">48dip</item> 
    <item name="android:maxwidth">48dip</item> 
    <item name="android:minheight">48dip</item> 
    <item name="android:maxheight">48dip</item> 
</style>
<style name="widget.progressbar"> 
    <item name="android:indeterminateonly">true</item> 
    <item name="android:indeterminatedrawable">@android:drawable/progress_medium_white</item> 
    <item name="android:indeterminatebehavior">repeat</item> 
    <item name="android:indeterminateduration">3500</item> 
    <item name="android:minwidth">48dip</item> 
    <item name="android:maxwidth">48dip</item> 
    <item name="android:minheight">48dip</item> 
    <item name="android:maxheight">48dip</item> 
</style>

这是默认转圈的效果style，但今天我们修改的是水平进度条颜色！
所以找到

<style name="widget.progressbar.horizontal"> 
    <item name="android:indeterminateonly">false</item> 
    <item name="android:progressdrawable">@android:drawable/progress_horizontal</item> 
    <item name="android:indeterminatedrawable">@android:drawable/progress_indeterminate_horizontal</item> 
    <item name="android:minheight">20dip</item> 
    <item name="android:maxheight">20dip</item> 
</style>
<style name="widget.progressbar.horizontal"> 
    <item name="android:indeterminateonly">false</item> 
    <item name="android:progressdrawable">@android:drawable/progress_horizontal</item> 
    <item name="android:indeterminatedrawable">@android:drawable/progress_indeterminate_horizontal</item> 
    <item name="android:minheight">20dip</item> 
    <item name="android:maxheight">20dip</item> 
</style>

你看系统一步一步关联的，扩展性很性，低耦合，所以我们现在只要改变进度条是怎么样画出来的就行了 ，但是负责画进度条的是
<item name="android:progressdrawable">  所以我们可以找到"drawable下的 progress_horizontal 文件，改变他就可以改变进度条颜色

<?xml version="1.0" encoding="utf-8"?> 
<!-- copyright (c) 2008 the android open source project 
   licensed under the apache license, version 2.0 (the "license"); 
   you may not use this file except in compliance with the license. 
   you may obtain a copy of the license at 
     http://www.apache.org/licenses/license-2.0 
   unless required by applicable law or agreed to in writing, software 
   distributed under the license is distributed on an "as is" basis, 
   without warranties or conditions of any kind, either express or implied. 
   see the license for the specific language governing permissions and 
   limitations under the license. 
--> 
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"> 
  <item android:id="@android:id/background"> 
    <shape> 
      <corners android:radius="5dip" /> 
      <gradient 
          android:startcolor="#ff9d9e9d" 
          android:centercolor="#ff5a5d5a" 
          android:centery="0.75" 
          android:endcolor="#ff747674" 
          android:angle="270" 
      /> 
    </shape> 
  </item> 
  <item android:id="@android:id/secondaryprogress"> 
    <clip> 
      <shape> 
        <corners android:radius="5dip" /> 
        <gradient 
            android:startcolor="#80ffd300" 
            android:centercolor="#80ffb600" 
            android:centery="0.75" 
            android:endcolor="#a0ffcb00" 
            android:angle="270" 
        /> 
      </shape> 
    </clip> 
  </item> 
  <item android:id="@android:id/progress"> 
    <clip> 
      <shape> 
        <corners android:radius="5dip" /> 
        <gradient 
            android:startcolor="#ffffd300" 
            android:centercolor="#ffffb600" 
            android:centery="0.75" 
            android:endcolor="#ffffcb00" 
            android:angle="270" 
        /> 
      </shape> 
    </clip> 
  </item> 
</layer-list> 

<?xml version="1.0" encoding="utf-8"?> 
<!-- copyright (c) 2008 the android open source project 
   licensed under the apache license, version 2.0 (the "license"); 
   you may not use this file except in compliance with the license. 
   you may obtain a copy of the license at 
     http://www.apache.org/licenses/license-2.0 
   unless required by applicable law or agreed to in writing, software 
   distributed under the license is distributed on an "as is" basis, 
   without warranties or conditions of any kind, either express or implied. 
   see the license for the specific language governing permissions and 
   limitations under the license. 
--> 
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"> 
  <item android:id="@android:id/background"> 
    <shape> 
      <corners android:radius="5dip" /> 
      <gradient 
          android:startcolor="#ff9d9e9d" 
          android:centercolor="#ff5a5d5a" 
          android:centery="0.75" 
          android:endcolor="#ff747674" 
          android:angle="270" 
      /> 
    </shape> 
  </item> 
  <item android:id="@android:id/secondaryprogress"> 
    <clip> 
      <shape> 
        <corners android:radius="5dip" /> 
        <gradient 
            android:startcolor="#80ffd300" 
            android:centercolor="#80ffb600" 
            android:centery="0.75" 
            android:endcolor="#a0ffcb00" 
            android:angle="270" 
        /> 
      </shape> 
    </clip> 
  </item> 
  <item android:id="@android:id/progress"> 
    <clip> 
      <shape> 
        <corners android:radius="5dip" /> 
        <gradient 
            android:startcolor="#ffffd300" 
            android:centercolor="#ffffb600" 
            android:centery="0.75" 
            android:endcolor="#ffffcb00" 
            android:angle="270" 
        /> 
      </shape> 
    </clip> 
  </item> 
</layer-list> 

看到没有，这是系统的进度条画出的布局条件

android:startcolor="#80ffd300"
android:centercolor="#80ffb600"
android:endcolor="#ff747674"

我们只要改变这个色值就能改变他的颜色，主要改变的是<item android:id="@android:id/progress">下的色值就行了
说了这么多，到底怎么做呢， 很简单

1. 在我们的项目下新建一个 style.xml 文件

创建一个style 标签，集成系统默认样式，然后自定义一个新的progressdrawable  文件，随后面在layout 中的progress 中引用这个文件就行

<style name="progressbar_mini" parent="@android:style/widget.progressbar.horizontal">
    <item name="android:maxheight">50dip</item>
    <item name="android:minheight">8dip</item>
    <item name="android:indeterminateonly">false</item>
    <item name="android:indeterminatedrawable">@android:drawable/progress_indeterminate_horizontal</item>
    <item name="android:progressdrawable">@drawable/progressbar_mini</item>
</style>

下面是我的  progressbar_mini  文件，改变了下android:endcolor="#f5f5f5" android:startcolor="#bebebe"  的色值

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" > 
  <item android:id="@android:id/background"> 
     <shape > 
        <corners android:radius="5dip" /> 
        <gradient 
          android:angle="270" 
          android:centery="0.75" 
          android:endcolor="#f5f5f5" 
          android:startcolor="#bebebe" /> 
      </shape> 
  </item> 
  <item android:id="@android:id/secondaryprogress"> 
    <clip > 
      <shape > 
        <corners android:radius="0dip" /> 
        <gradient 
          android:angle="270" 
          android:centery="0.75" 
          android:endcolor="#165cbc" 
          android:startcolor="#85b0e9" /> 
      </shape> 
    </clip> 
  </item> 
  <item android:id="@android:id/progress"> 
    <clip > 
      <shape > 
        <corners android:radius="5dip" /> 
        <gradient 
          android:angle="270" 
          android:centery="0.75" 
          android:endcolor="#165cbc" 
          android:startcolor="#85b0e9" /> 
      </shape> 
    </clip> 
  </item> 
</layer-list>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" > 
  <item android:id="@android:id/background"> 
     <shape > 
        <corners android:radius="5dip" /> 
        <gradient 
          android:angle="270" 
          android:centery="0.75" 
          android:endcolor="#f5f5f5" 
          android:startcolor="#bebebe" /> 
      </shape> 
  </item> 
  <item android:id="@android:id/secondaryprogress"> 
    <clip > 
      <shape > 
        <corners android:radius="0dip" /> 
        <gradient 
          android:angle="270" 
          android:centery="0.75" 
          android:endcolor="#165cbc" 
          android:startcolor="#85b0e9" /> 
      </shape> 
    </clip> 
  </item> 
  <item android:id="@android:id/progress"> 
    <clip > 
      <shape > 
        <corners android:radius="5dip" /> 
        <gradient 
          android:angle="270" 
          android:centery="0.75" 
          android:endcolor="#165cbc" 
          android:startcolor="#85b0e9" /> 
      </shape> 
    </clip> 
  </item> 
</layer-list>

最后在中引用就可以了

<progressbar
    android:id="@+id/progress"
    style="@style/progressbar_mini"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:progress="50" />

希望本文所述对大家android程序设计有所帮助。