Question

我必须按照代码调用BroadcastReceiver：

 public class WorkItemAlarmManager {
    ...
        public void initAlarm(HelpMe helpMe, String delay,String period,WorkItem workItem){
            //HelpMe = Activity
helpMe.registerReceiver(new WorkItemAlarmHandler() , new IntentFilter("WORK_ITEM_ALARM"));

            Intent intent = new Intent("WORK_ITEM_ALARM");
            intent.setClass(helpMe, WorkItemAlarmManager.class);
            intent.putExtra("work_item", workItem);
            PendingIntent mAlarmSender = PendingIntent.getService(helpMe, 0,intent, 0);

            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(System.currentTimeMillis());
            //System.out.println("START"+System.currentTimeMillis());   
            calendar.add(Calendar.SECOND, calcDelayMillis(delay));
            //System.out.println("END"+calendar.getTimeInMillis());
            AlarmManager am = (AlarmManager) helpMe.getSystemService(Context.ALARM_SERVICE);
            am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), mAlarmSender);
        }
    ...
    }

和BroadcastReceiver：

public class WorkItemAlarmHandler extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        ....
    }

}

但是从不调用WorkItemAlarmHandler。

更新：我首先尝试在清单中注册BroadcastReceiver。但那不起作用：

<receiver
            android:name="de.helpme.alarm.WorkItemAlarmHandler"
            android:enabled="true"
            android:label="WorkItemAlarmHandler" >
            <intent-filter>
                <action android:name="WORK_ITEM_ALARM" />
            </intent-filter>
        </receiver>

感谢您的回答:)。现在它有效 - 但我还不知道哪一个是正确的，因为我立刻实现了两个答案。如果一个数字是正确的，我将右边标记为答案。

更新我认为问题的原因是：

PendingIntent mAlarmSender = PendingIntent.getService(helpMe, 0,intent, 0);

使用此代码可以正常工作：

PendingIntent mAlarmSender = PendingIntent.getBroadcast(helpMe, 0, intent, 0);

再次感谢您的帮助！

Answer 1

试试这个：

在工作项目AlarmManager中;

public class WorkItemAlarmManager {
    ...
        public void initAlarm(HelpMe helpMe, String delay,String period,WorkItem workItem){
            Intent intent =new Intent(helpMe, WorkItemAlarmHandler.class);
            intent.setAction("WORK_ITEM_ALARM");
            intent.putExtra("work_item", workItem);
            PendingIntent mAlarmSender=
            PendingIntent.getBroadcast(helpMe, 0, intent, 0);
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(System.currentTimeMillis());
            //System.out.println("START"+System.currentTimeMillis());   
            calendar.add(Calendar.SECOND, calcDelayMillis(delay));
            //System.out.println("END"+calendar.getTimeInMillis());
            AlarmManager am = (AlarmManager) helpMe.getSystemService(Context.ALARM_SERVICE);
            am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), mAlarmSender);
        }
    ...
    }

并在WorkItemAlarmHandler中：

public class WorkItemAlarmHandler extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        if(intent.getAction().equals("WORK_ITEM_ALARM")){
            Toast.makeText(context, "WORK_ITEM_ALARM", Toast.LENGTH_LONG).show();
            }else{
            Toast.makeText(context, "repeating alarm",
            Toast.LENGTH_LONG).show();
            }
    }

}

Answer 2

您的代码使用：

intent.setClass(helpMe, WorkItemAlarmManager.class);

但是使用setClass（...）方法指定应该最终处理意图的类。

因此你应该写：

intent.setClass(helpMe, WorkItemAlarmHandler.class);

据我记忆，如果您手动指定类或组件（例如使用setClass（）方法），则必须在清单中指定此对象，因此请确保在那里提及接收器。

不调用BroadcastReceiver

2 个答案: