Android 动态注册的BroadcastReceiver实例未触发?
我一直在试图找出问题所在,但我似乎无法。。。我的onReceive似乎没有接到电话,以下是我的情况:Android 动态注册的BroadcastReceiver实例未触发?,android,broadcastreceiver,Android,Broadcastreceiver,我一直在试图找出问题所在,但我似乎无法。。。我的onReceive似乎没有接到电话,以下是我的情况: public abstract class NoUpdatesTimer extends BroadcastReceiver { private Context context; private PendingIntent pendingIntent; public NoUpdatesTimer(Context context) { this.conte
public abstract class NoUpdatesTimer extends BroadcastReceiver {
private Context context;
private PendingIntent pendingIntent;
public NoUpdatesTimer(Context context) {
this.context = context;
Intent intent = new Intent(Constants.ALARM_NO_LOC_UPDATES);
pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
context.registerReceiver(this, new IntentFilter(Constants.ALARM_NO_LOC_UPDATES));
}
public void scheduleCheck(long delayMillis) {
AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + delayMillis, pendingIntent);
}
@Override
public void onReceive(Context context, Intent intent) {
...
}
}
通过一些调试,我验证了scheduleChecking被调用,但onReceive方法没有被调用。我还尝试使用以下命令从shell触发此代码:
adb shell am broadcast -a rsg.ms.7
(其中常量报警号位置更新为“rsg.ms.7”)
您能告诉我如何更改以调用onReceive吗?使用应用程序上下文而不是传入的服务上下文似乎可以使其工作,但不确定原因:
public abstract class NoUpdatesTimer extends BroadcastReceiver {
private Context context;
private PendingIntent pendingIntent;
public NoUpdatesTimer(Context context) {
this.context = context.getApplicationContext();
Intent intent = new Intent(Constants.ALARM_NO_LOC_UPDATES);
pendingIntent = PendingIntent.getBroadcast(this.context, 0, intent, 0);
this.context.registerReceiver(this, new IntentFilter(Constants.ALARM_NO_LOC_UPDATES));
}
public void scheduleCheck(long delayMillis) {
AlarmManager alarmManager = (AlarmManager)this.context.getSystemService(Context.ALARM_SERVICE);
alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + delayMillis, pendingIntent);
}
@Override
public void onReceive(Context context, Intent intent) {
...
}
}
pendingent
的性质与ApplicationContext
相关。
例如,当广播在应用程序之外时,它与小部件一起使用。
因此,当您从pendingent.getBroadcast
中的pendingent
获取广播时,您必须提供应用程序上下文,而不是较低的层。
我曾经有过同样的问题,我花了一整天的时间才弄明白