android - 报警管理器没有激活广播接收器？

Question

我正在开发一个应用程序，其中我使用 AlarmManager 来安排事情。我的闹钟已设置。但是此警报不会调用为捕获事件而编写的 BroadcastReceiver。我进行了大量搜索，但没有找到任何可以解决问题的方法。我正在发布我的代码，请看看我是否遗漏了什么。

报警管理器类:

public class ScheduleMessageManager {

Context context;
PendingIntent sender;
AlarmManager am;


public ScheduleMessageManager(Context context) {
    this.context = context;
}

public void addAlram(int scheduledMessageID, long scheduledTime) {

    // Activate Broadcast Receiver to receive broadcasts
    activateBroadcastReceiver();
    //Calendar cal = Calendar.getInstance();

    Intent intent = new Intent(context, AlarmReceiver.class);
    // In reality, you would want to have a unique variable for the request
    // code
    intent.putExtra("scheduledMessageID", scheduledMessageID);
    sender = PendingIntent.getBroadcast(context, scheduledMessageID, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    // Get the AlarmManager service
    am = (AlarmManager) context.getSystemService(context.ALARM_SERVICE);
    am.set(AlarmManager.RTC_WAKEUP, scheduledTime, sender);

    Log.e("In ScheduleMessageManage", "***** Alarm is set to the mmessage *****");
}

public void cancelPeriodicSchedule(PendingIntent sender) {
    if (am != null) {
        if (sender != null) {
            am.cancel(sender);
            sender.cancel();
        }
    }

    // Deactivate Broadcast Receiver to stop receiving broadcasts
    deactivateBroadcastreceiver();
}

private void activateBroadcastReceiver() {
    PackageManager pm = context.getPackageManager();
    ComponentName componentName = new ComponentName(context, AlarmReceiver.class);
    pm.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);
    Toast.makeText(context, "activated", Toast.LENGTH_LONG).show();
}

private void deactivateBroadcastreceiver() {
    // TODO Auto-generated method stub

    PackageManager pm = context.getPackageManager();
    ComponentName componentName = new ComponentName(context, AlarmReceiver.class);
    pm.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);
    Toast.makeText(context, "cancelled", Toast.LENGTH_LONG).show();

}

我的报警接收器:

public class AlarmReceiver extends BroadcastReceiver {

int pendingIntentID; // same as scheduledMessageID

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

    Log.e("In On Receive", "Alarm has Initiated Broadcast Receiver....");

    if (intent.hasExtra("scheduledMessageID")) {
        pendingIntentID = intent.getExtras().getInt("scheduledMessageID");
        Intent sendMessageServiceIntent = new Intent(context, SendMessageService.class);
        sendMessageServiceIntent.putExtra("pendingIntentID", pendingIntentID);
        context.startService(sendMessageServiceIntent);
    }
}

OnReceieve() 从未被调用。

在我的Manifest.xml

  <receiver
        android:name="myPackage.AlarmReceiver"
        android:enabled="true" >
    </receiver>

我无法弄清楚问题出在哪里。请帮我摆脱它。谢谢!

Answer 1

http://www.vogella.com/articles/AndroidBroadcastReceiver/article.html 中提供了一个很好的使用广播接收器的教程。 .本质上，您的接收器不会声明它将接收什么事件。 Manifest 文件中的声明需要如下内容:

 <receiver
    android:name="myPackage.AlarmReceiver"
    android:enabled="true" >
    <intent-filter>
            <action android:name="your.company.blah.mybroadcast" />
        </intent-filter>
</receiver>

当您创建 Intent 时，它需要

Intent intent = new Intent();
intent.setAction("your.company.blah.mybroadcast");
// All the other things you want to put in the intent