我创建了一个通过 AlarmManager 启动的简单状态通知。一切正常(通知的内容、标题、点击时启动的 Activity 等)。不幸的是,当调用通知时(即,AlarmManager 关闭),将启动并显示一个空 Activity 。该 Activity 仅在状态栏中包含我的应用程序的名称及其图标。实际 Activity 本身是空白的。同样,当通知关闭并首次出现在状态栏中时,就会发生这种情况。当我再次点击通知时,它会转到正确的待处理 Activity 。这是我的代码:
下面是设置 AlarmManager 调用 Notification 的代码:
//Use AlarmManager to trigger the notification/alarm.
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
//PendingIntent to launch activity when the alarm triggers.
Intent intent = new Intent("com.YouForgotWhat.FlightGear.DisplayNotification");
PendingIntent displayIntent = PendingIntent.getActivity(getBaseContext(), 0, intent, 0);
//Set an alarm to go off at 30 minutes before fuel runs out.
alarmManager.set(AlarmManager.RTC_WAKEUP, endTimeInMillis - (30*60*1000), displayIntent);
下面是通知本身的实际代码(它在另一个 Activity 中):
公共(public)类 DisplayNotification 扩展 SherlockActivity { 私有(private)上下文上下文=这个;
public void onCreate(Bundle paramBundle) {
super.onCreate(paramBundle);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
mBuilder.setContentTitle("Your fuel may be running low.")
.setContentText("There are 30 mins left on your timer. Check your fuel gauges.")
.setSmallIcon(R.drawable.ic_launcher);
Intent intent = new Intent(this, FuelTimer.class);
PendingIntent in = PendingIntent.getActivity(getApplicationContext(), 0, intent, 0);
mBuilder.setContentIntent(in);
mNotificationManager.notify(0, mBuilder.build());
}
}
我该怎么做才能解决这个问题?谢谢!
最佳答案
您正在启动一个 Activity 来发出通知,一开始您看到一个空的 Activity 是有道理的 - 这正是您刚刚启动的。请改用 BroadcastReceiver。
所以当它收到:
public class Receiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent)
{
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context);
mBuilder.setContentTitle("Your fuel may be running low.")
.setContentText("There are 30 mins left on your timer. Check your fuel gauges.")
.setSmallIcon(R.drawable.ic_launcher);
Intent intent = new Intent(context, FuelTimer.class);
PendingIntent in = PendingIntent.getActivity(context, 0, intent, 0);
mBuilder.setContentIntent(in);
mNotificationManager.notify(0, mBuilder.build());
}
}
您必须将接收器添加到 list 中:
<receiver android:name="com.YouForgotWhat.FlightGear.Receiver" >
<intent-filter>
<action android:name="com.YouForgotWhat.FlightGear.DisplayNotification" />
</intent-filter>
</receiver>
最后,更改代码以启动接收器,就像
//PendingIntent to launch activity when the alarm triggers.
Intent intent = new Intent("com.YouForgotWhat.FlightGear.DisplayNotification");
PendingIntent displayIntent = PendingIntent.getBroadcast(getBaseContext(), 0, intent, 0);
关于android - NotificationManager 启动空 Activity ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14299608/