Android桌面小组件(AppWidget)

package com.qlf.widget; import android.app.PendingIntent; import android.appwidget.AppWidgetManager; import android.appwidget.AppWidgetProvider; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.widget.RemoteViews; public class AppWidget extends AppWidgetProvider { private final String broadCastString = "com.qlf.appWidgetUpdate"; /** * 删除一个AppWidget时调用 * */ @Override public void onDeleted(Context context, int[] appWidgetIds) { super.onDeleted(context, appWidgetIds); } /** * 最后一个appWidget被删除时调用 * */ @Override public void onDisabled(Context context) { super.onDisabled(context); } /** * AppWidget的实例第一次被创建时调用 * */ @Override public void onEnabled(Context context) { super.onEnabled(context); } /** * 接受广播事件 * */ @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(broadCastString)) { //只能通过远程对象来设置appwidget中的控件状态 RemoteViews remoteViews = new RemoteViews(context.getPackageName(),R.layout.appwidgetlayout); remoteViews.setTextViewText(R.id.btnSend, "hihi"); //获得appwidget管理实例，用于管理appwidget以便进行更新操作 AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context); //相当于获得所有本程序创建的appwidget ComponentName componentName = new ComponentName(context,AppWidget.class); //更新appwidget appWidgetManager.updateAppWidget(componentName, remoteViews); } super.onReceive(context, intent); } /** * 到达指定的更新时间或者当用户向桌面添加AppWidget时被调用 * */ @Override public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { //创建一个Intent对象 Intent intent = new Intent(); intent.setAction(broadCastString); //这里是getActivity，当然也可以是broadcastReceiver等 PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0); RemoteViews remoteViews = new RemoteViews(context.getPackageName(),R.layout.appwidgetlayout); remoteViews.setOnClickPendingIntent(R.id.btnSend, pendingIntent); //更新Appwidget appWidgetManager.updateAppWidget(appWidgetIds, remoteViews); } }