Android 3种自定义圆形ProgressBar

一. 图片自定义圆形 首先在drawable目录定义背景xml res/drawable/loading_img.xml

<?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>

然后在布局进行引用

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

二.通过自定义颜色实现,跟图片差不多 1.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>

2.在布局文件引用

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

三.通过一系列图片进行变换,类似于帧动画 1.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>

2.也是在布局文件中引用

<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" />