Android：无法从意图设置/检索数据

Question

我想在我的应用程序中安排本地通知。这是我的RootReceiver班。

public class RebootReceiver extends BroadcastReceiver { 

private String EVENT_CATEGORY = "notification_event"; 

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

    Debug.waitForDebugger(); 
    AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); 
    Intent intent1 = new Intent(context, AlarmScheduler.class); 
    PendingIntent intentExecuted = PendingIntent.getBroadcast(context, 0, intent1, PendingIntent.FLAG_CANCEL_CURRENT); 
    Calendar now = Calendar.getInstance(); 

    if (!GeneralMethods.getBooleanPreference(context, ProperatiPreferences.APP_FIRST_LAUNCH)) { 
     intent1.putExtra(EVENT_CATEGORY, ""); 
     now.add(Calendar.HOUR, 2); 
     alarmManager.set(AlarmManager.RTC_WAKEUP, now.getTimeInMillis(), intentExecuted); 
    } else if (!GeneralMethods.getBooleanPreference(context, ProperatiPreferences.SEARCH_AFTER_THREE_DAYS)) { 
     intent1.putExtra(EVENT_CATEGORY, ""); 
     now.add(Calendar.DATE, 3); 
     alarmManager.set(AlarmManager.RTC_WAKEUP, now.getTimeInMillis(), intentExecuted); 
    } 
} 
} 

在这里你可以看到，我想创造一个我希望把一些数据（intent1）的意图。然而，意图总是空的，没有任何额外的内容。我究竟做错了什么？

下面是我如何尝试从意图检索额外的东西。

public class AlarmScheduler extends BroadcastReceiver { 

private String EVENT_CATEGORY = "notification_event"; 

@Override 
public void onReceive(final Context context, final Intent intent) { 
    Log.d("com.properati.user", "AlarmScheduler.onReceive() called"); 

    Intent eventService = new Intent(context, AlarmService.class); 
    context.startService(eventService); 
} 

最后我AlarmService类：

public class AlarmService extends Service { 

private String EVENT_CATEGORY = "notification_event"; 

@Override 
public IBinder onBind(final Intent intent) { 
    return null; 
} 

@Override 
public int onStartCommand(final Intent intent, final int flags, final int startId) { 
    Log.d("com.properati.user", "event received in service: " + new Date().toString()); 

    if(intent.getStringExtra(EVENT_CATEGORY).equals(ProperatiPreferences.APP_FIRST_LAUNCH)){ 
     new PushNotification(getApplicationContext()).scheduleNonOpenedNotification(getApplicationContext()); 
    }else if(intent.getStringExtra(EVENT_CATEGORY).equals(ProperatiPreferences.SEARCH_AFTER_THREE_DAYS)){ 
     new PushNotification(getApplicationContext()).scheduleNoSearchAfterThreeDays(getApplicationContext()); 
    } 

    return Service.START_NOT_STICKY; 
} 

Answer 1

试试下面的代码AlarmScheduler类

public class AlarmScheduler extends BroadcastReceiver { 
    private String EVENT_CATEGORY = "notification_event"; 
@Override 
public void onReceive(final Context context, final Intent intent) { 
    Log.d("com.properati.user", "AlarmScheduler.onReceive() called"); 
    Intent eventService = new Intent(context, AlarmService.class); 
    eventService.putExtra(intent.getStringExtra(EVENT_CATEGORY, "")); 
    context.startService(eventService); 
} 

Answer 2

后，我检查了Android框架中的PendingIntent源，意图参数将被new Intent(intent)克隆。因此在将它传递给PendingIntent构造函数之前，您需要将所有数据设置为intent1。

@Override 
public IIntentSender getIntentSender(int type, 
     String packageName, IBinder token, String resultWho, 
     int requestCode, Intent[] intents, String[] resolvedTypes, 
     int flags, Bundle options, int userId) { 
    enforceNotIsolatedCaller("getIntentSender"); 
    // Refuse possible leaked file descriptors                                         
    if (intents != null) { 
     if (intents.length < 1) { 
      throw new IllegalArgumentException("Intents array length must be >= 1"); 
     } 
     for (int i=0; i<intents.length; i++) { 
      Intent intent = intents[i]; 
      if (intent != null) { 
       if (intent.hasFileDescriptors()) { 
        throw new IllegalArgumentException("File descriptors passed in Intent"); 
       } 
       if (type == ActivityManager.INTENT_SENDER_BROADCAST && 
         (intent.getFlags()&Intent.FLAG_RECEIVER_BOOT_UPGRADE) != 0) { 
        throw new IllegalArgumentException(
          "Can't use FLAG_RECEIVER_BOOT_UPGRADE here"); 
       } 
       intents[i] = new Intent(intent); 
      } 
     } 
     if (resolvedTypes != null && resolvedTypes.length != intents.length) { 
      throw new IllegalArgumentException(
        "Intent array length does not match resolvedTypes length"); 
     } 
    }