Android应用源码之ProgressWheel 支持进度显示的圆形ProgressBar.zip

Progress Wheel ============= This is a custom component for Android intended for use instead of a progress bar.     A complete walkthrough of how to use this component in your app ------------- **XML:** To implement the view in your xml layout do the following: 1. Add the following to your attrs.xml file (in res/values): ``` xml <declare-styleable name="ProgressWheel"> <attr name="text" format="string" /> <attr name="textColor" format="color" /> <attr name="textSize" format="dimension" /> <attr name="barColor" format="color" /> <attr name="rimColor" format="color" /> <attr name="rimWidth" format="dimension" /> <attr name="spinSpeed" format="integer" /> <attr name="circleColor" format="color" /> <attr name="radius" format="dimension" /> <attr name="barWidth" format="dimension" /> <attr name="barLength" format="dimension" /> </declare-styleable> ``` 2. Add the following code to the root view of your layout: `xmlns:ProgressWheel="http://schemas.android.com/apk/res/com.visualdenim.schooltraq"` 3. Add the widget code in the appropriate place in your xml file. Here's a sample implementation: ``` xml <com.todddavies.components.progressbar.ProgressWheel android:id="@+id/pw_spinner" android:layout_width="200dp" android:layout_height="200dp" android:layout_centerInParent="true" ProgressWheel:text="Authenticating..." ProgressWheel:textColor="#222" ProgressWheel:textSize="14sp" ProgressWheel:rimColor="#330097D6" ProgressWheel:barLength="60dp" ProgressWheel:barColor="#0097D6" ProgressWheel:barWidth="5dp" ProgressWheel:rimWidth="2dp" /> ``` **Java:** First you need to either get a ProgressWheel from a layout file, or initalise one. Do this by: - `ProgressWheel pw = new ProgressWheel(myContext, myAttributes);` - `ProgressWheel pw = (ProgressWheel) findViewById(R.id.pw_spinner);` To spin the progress wheel, you just call .`spin()` and to stop it spinning, you call `.stopSpinning()` Incrementing the progress wheel is slightly more tricky, you call `.incrementProgress()`. However, this is out of 360, (because a circle has 360 degrees), and will automatically reset once you get past 360. A percentage display is automatically displayed. Using as a library project -------------------------- Since Android SDK Tools revision 17 (released March 2012), this component can be used as a library project. In this case, you do *not* need to copy anything into your project's attrs.xml, and you must use the following namespace URI, instead of the above: `xmlns:ProgressWheel="http://schemas.android.com/apk/res-auto"` Otherwise, usage should be the same. Todd Davies - 2012