Android Desktop component app widget development in three steps

The Desktop component app widget is a practical function of Android. Although the development process is not very difficult, there are many steps and a little trouble. The following key steps are summarized to facilitate future use. The project is packaged to facilitate future use. Create an android project and follow the steps below to create a simple app widget.

Step 1 create an appwidgetprovider subclass

public class SimpleWidget extends AppWidgetProvider{    @Override    public void onUpdate(Context context,AppWidgetManager appWidgetManager,        int[] appWidgetIds){        super.onUpdate(context, appWidgetManager, appWidgetIds);    }}

Step 2 create the app widget layout file and setting file

Layout file Res/layout/simple_widget.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="TextView" /></LinearLayout>

Set file Res/XML/simple_widget.xml

(Initiallayout must match the layout file name)

<?xml version="1.0" encoding="utf-8"?><appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"     android:initialLayout="@layout/simple_widget"     android:minWidth="72dp"     android:minHeight="72dp"     android:updatePeriodMillis="86400000"     ></appwidget-provider>

Step 3 modify androidmanifest. xml

Add the following subnodes under the application node:

<receiver android:name="SimpleWidget" >    <intent-filter>        <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />    </intent-filter>    <meta-data        android:name="android.appwidget.provider"        android:resource="@xml/simple_widget" /></receiver>

Save all. In this step, you can start running. Demo:

Finally, we provide the packaged project source code package ,.