(iii) Customize the implementation of circular progress bars that are constantly spinning (primarily during network access, prompting the user to obtain data)

1. The progress bar to be realized is as follows:

2. The code in View_loading.xml is as follows:

<?XML version= "1.0" encoding= "Utf-8"?><Relativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Android:id= "@+id/loading_view_layout"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"Android:background= "#e5e4e9"android:descendantfocusability= "Blocksdescendants" >    <RelativelayoutAndroid:layout_width= "Fill_parent"Android:layout_height= "Wrap_content"android:layout_centerinparent= "true"android:gravity= "Top" >        <ProgressBarAndroid:id= "@+id/loading_view_progressbar"style= "@style/loadingviewprogressbarstyle"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_centerhorizontal= "true"android:visibility= "visible" />        <TextViewAndroid:id= "@+id/loading_view_textview"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_below= "@+id/loading_view_progressbar"Android:layout_centerhorizontal= "true"Android:layout_margintop= "4DP"Android:text= "Loading ..."Android:textcolor= "#999999"android:textsize= "12SP" />    </Relativelayout></Relativelayout>

3. The Loadingviewprogressbarstyle in Styles.xml are as follows:

<stylename= "Loadingviewprogressbarstyle"> 　　         <Itemname= "Android:indeterminatedrawable">@drawable/load_rotate</Item> 　　         <Itemname= "Android:minwidth">20dip</Item> 　　         <Itemname= "Android:maxwidth">20dip</Item> 　　         <Itemname= "Android:minheight">20dip</Item> 　　         <Itemname= "Android:maxheight">20dip</Item> </style>

4. The contents of the Load_rotate.xml file under the Drawable folder are as follows:

<? XML version= "1.0" encoding= "Utf-8" ?> <  xmlns:android= "http://schemas.android.com/apk/res/android"    android:drawable  = "@drawable/load_icon"    android:fromdegrees= "0"    android: Pivotx= "50%"    android:pivoty= "50%"    android:todegrees  = "/> "

5. The picture form of Load_icon is as follows:

(iii) Customize the implementation of circular progress bars that are constantly spinning (primarily during network access, prompting the user to obtain data)