原文章地址 https://liuzhichao.com/p/636.html

进度条默认是不确定（indeterminate=true）Android进度条

Android进度条有4种风格可以使用。

默认值是progressBarStyle。

设置成progressBarStyleSmall后，图标变小。

设置成progressBarStyleLarge后，图标变大

设置成progressBarStyleHorizontal后，变成横向长方形。

自定义圆形进度条ProgressBar的一般有三种方式:

一、通过动画实现

定义res/anim/loading_anim.xml如下:

<?xml version="1.0" encoding="utf-8"?>
<animation-list android:oneshot="false"
xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f0" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f1" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f2" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f3" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f4" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f5" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f6" />
   <item android:duration="150" android:drawable="@drawable/loading_blue_16_f7" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f8" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f9" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f10" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f11" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f12" /> 
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f13" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f14" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f15" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f16" />
  <item android:duration="150" android:drawable="@drawable/loading_blue_16_f17" />
</animation-list>`

在layout文件中引用如下：

<ProgressBar
  android:id="@+id/progressBar1"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_gravity="center_horizontal"
  android:layout_marginBottom="20dip"
  android:layout_marginTop="20dip"
  android:indeterminate="false"
  android:indeterminateDrawable="@anim/loading_anim" />

二、通过自定义颜色实现

定义res/drawable/loading_color.xml如下：

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
  android:fromDegrees="0"
  android:pivotX="50%"
  android:pivotY="50%"
  android:toDegrees="360" >
  <shape
    android:innerRadiusRatio="3"
    android:shape="ring"
    android:thicknessRatio="8"
    android:useLevel="false" >
      <gradient
        android:centerColor="#FFDC35"
        android:centerY="0.50"
        android:endColor="#CE0000"
        android:startColor="#FFFFFF"
        android:type="sweep"
        android:useLevel="false" />
  </shape>
</rotate>

在layout文件中引用如下：

<ProgressBar
  android:id="@+id/progressBar2"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:indeterminate="false"
  android:indeterminateDrawable="@drawable/loading_color" />

三、使用一张图片进行自定义

定义res/drawable/loading_img.xml如下：

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
  <item>
    <rotate
      android:drawable="@drawable/exchange_loading"
      android:fromDegrees="0.0"
      android:pivotX="50.0%"
      android:pivotY="50.0%"
      android:toDegrees="360.0" />
  </item>
</layer-list>

在layout文件中引用如下：

<ProgressBar
  android:id="@+id/progressBar3"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:indeterminate="false"
  android:indeterminateDrawable="@drawable/lodaing_img"/>