Android学习之App Widgets

需要定义一个AppWidgetProvider的子类，并覆盖其中的某些方法来控制自己的AppWidget
public void onReceive(Context context, Intent intent) {
Log.i(TAG, "Receive");
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(),yout.second);
//进行控件的修改，比如图片等
remoteViews.setTextViewText(R.id.txt, "修改后信息");
//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,ExampleAppWidgetProvider.class);
//更新appwidget
appWidgetManager.updateAppWidget(componentName, remoteViews);
Log.i(TAG, "OK");
}
super.onReceive(context, intent);
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
{
Log.i(TAG, "Update");
for (int i = 0; i < appWidgetIds.length; i++)
{
Intent intent = new Intent(context, MainActivity.class);
PendingIntent pendingIntent =
PendingIntent.getActivity(context, 0, intent, 0);
RemoteViews views = new
RemoteViews(context.getPackageName(), yout.second);
views.setOnClickPendingIntent(R.id.btn, pendingIntent);
Intent intent2 = new Intent();
intent2.setAction(broadCastString);
PendingIntent pendingIntent2 =
PendingIntent.getBroadcast(context, 0, intent2, 0);
views.setOnClickPendingIntent(R.id.broadcast, pendingIntent2);
appWidgetManager.updateAppWidget(appWidgetIds[i], views);//更新以确定添加了响应
Log.i(TAG, "Length:"+ appWidgetIds.length+ ";I="+ i);
}
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
生命周期:
创建第一个时:
onReceive → onEnabled → onReceive → onUpdate 创建非第一个时：
onReceive → onUpdate
删除非最后一个时：
onReceive → onDelete
删除最后一个时：
onReceive → onDelete → onReceive → onDisable。