创建一个简单的widget(自mars)

1 、创建一个AppWidgetProvider 

 

 

public class ExampleAppWidgetProvider extends AppWidgetProvider {
	//定义一个常量字符串,该常量用于命名Action
	private static final String UPDATE_ACTION = "mars.appwidget03.UPDATE_APP_WIDGET";
	//定义一个常量字符串,用于杀死app
	private static final String KILL_APP = "com.rui.app.KILL_APP";

	@Override
	public void onDeleted(Context context, int[] appWidgetIds) {
		// TODO Auto-generated method stub
		super.onDeleted(context, appWidgetIds);
	}

	@Override
	public void onDisabled(Context context) {
		// TODO Auto-generated method stub
		super.onDisabled(context);
	}

	@Override
	public void onEnabled(Context context) {
		// TODO Auto-generated method stub
		super.onEnabled(context);
	}

	@Override
	public void onReceive(Context context, Intent intent) {
		super.onReceive(context, intent);
		String action = intent.getAction();
		Log.i("TAG", action);
	}

	@Override
	public void onUpdate(Context context, AppWidgetManager appWidgetManager,
			int[] appWidgetIds) {
		Log.i("TAG", "===================================");
		//创建一个Intent对象
		Intent intent = new Intent();
		//为Intent对象设置Action
		intent.setAction(KILL_APP);
		//使用getBroadcast方法,得到一个PendingIntent对象,当该对象执行时,会发送一个广播
		PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0,
				intent, 0);
		RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
				R.layout.example_appwidget);
		remoteViews.setOnClickPendingIntent(R.id.widgetButtonId, pendingIntent);
		appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);
	}

 

2 、在layout下面创建一个用于显示内容的布局  example_appwidget.xml

 

     <?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button
	android:id="@+id/widgetButtonId"
	android:layout_width="fill_parent"
	android:layout_height="wrap_content"
	android:text="测试用按钮"
	/>
</LinearLayout>

 

3 、再在res下面的xml下面新建一个 xml  (example_appwidget_info.xml)文件来指定此widget的一些信息:

 

     <appwidget-provider

	xmlns:android="http://schemas.android.com/apk/res/android"
    android:minWidth="294dp"
    android:minHeight="72dp"
    android:updatePeriodMillis="5000"
    android:initialLayout="@layout/example_appwidget"
 >
</appwidget-provider>
 

4 、 最后在 AndroidManifest.xml 中配置此widget的一些必须信息:

 

      <receiver android:name="ExampleAppWidgetProvider">

			<intent-filter>
				<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
			</intent-filter>
			<intent-filter>
				<action android:name="mars.appwidget03.UPDATE_APP_WIDGET"/>
			</intent-filter>
			<intent-filter>
				<action android:name="com.rui.app.KILL_APP"/>
			</intent-filter>
			<meta-data android:name="android.appwidget.provider"
				android:resource="@xml/example_appwidget_info" />
		</receiver>
 

 

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