Question

尝试发送广播并在特定时间接收广播。我注册广播的A类RegisterBroadcast方法：

cal = Calendar.getInstance();
int lap = 1000 * 60 * 10;
cal.setTimeInMillis(System.currentTimeMillis());
cal.set(Calendar.HOUR, 5);
cal.set(Calendar.MINUTE, 01);
AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), lap, pi);
Intent i = new Intent(getApplicationContext(), MyAlarm.class);
pi = PendingIntent.getBroadcast(getApplicationContext(), 0, i, 0);

接收器：

@Override
public void onReceive(Context cont, Intent i) {
    Toast.makeText(cont, "I am broadcasting", Toast.LENGTH_LONG).show();
}

清单：

<receiver android:name="com.anarkali.MyAlarm">

但是这段代码无法正常播放。有时它确实有时不是为什么？我很困惑。

Answer 1

您似乎在初始化之前使用PendingIntent pi，在这种情况下，它会使用当时分配给pi的任何值，这可能是旧PendingIntent 1}}或可能null：

am.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(),lap,pi);
Intent i = new Intent(getApplicationContext(),MyAlarm.class);
pi=PendingIntent.getBroadcast(getApplicationContext(), 0,i,0);

应该是：

Intent i = new Intent(getApplicationContext(),MyAlarm.class);
pi=PendingIntent.getBroadcast(getApplicationContext(), 0,i,0);
am.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(),lap,pi);

挂起意图的广播接收器不起作用

1 个答案: