android - 使用 putExtra() 时地理围栏事件出错

Question

我在尝试将对象传递给 GeofenceTransitionIntentService 时遇到问题。每当我使用 putExtra() 时，geofenceTransition 为 -1，因此我总是会收到错误消息，其余代码将被跳过。如果我不使用 putExtra()，通知会起作用。有什么办法可以解决吗？

这是我想放置额外内容的代码 fragment ，currentCharacter 是一个 Character 并且确实实现了可序列化。

private PendingIntent getGeofencePendingIntent() {
    if (geofencePendingIntent != null) {
        Log.d(TAG, "getGeofencependingintent return");
        return geofencePendingIntent;
    }

    Intent intent = new Intent(this, GeofenceTransitionIntentService.class);
    intent.putExtra("char", currentCharacter);
    Log.d(TAG, "getGeofencependingintent new");
    return PendingIntent.getService(this, 0, intent, PendingIntent.
            FLAG_UPDATE_CURRENT);
}

这是出错的代码段。这是在扩展 IntentService 的类中

 @Override
 protected void onHandleIntent(Intent intent) {
    GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent); 
    if (geofencingEvent.hasError()) {
        String errorMessage = "err";
        Log.e(TAG, errorMessage);
        return;
    }

    // Get the transition type.
    int geofenceTransition = geofencingEvent.getGeofenceTransition();

    // Test that the reported transition was of interest.
    if (geofenceTransition == Geofence.GEOFENCE_TRANSITION_ENTER ||
            geofenceTransition == Geofence.GEOFENCE_TRANSITION_EXIT) {

        // Get the geofences that were triggered. A single event can trigger multiple geofences.
        List<Geofence> triggeringGeofences = geofencingEvent.getTriggeringGeofences();

        // Get the transition details as a String.
        String geofenceTransitionDetails = getGeofenceTransitionDetails(
                this,
                geofenceTransition,
                triggeringGeofences
        );

        // Send notification and log the transition details.
        sendNotification(geofenceTransitionDetails);
        Log.d(TAG, geofenceTransitionDetails);
    } else {
        // Log the error.
        Log.e(TAG, "error");
    }
  currentCharacter = intent.getSerializableExtra("char");

}

Answer 1

您可以使用“共享首选项”而不是 intent.putExtra(); 来绕过这个问题。这是另一个 StackOverflow 问题的链接。 How to bypass intent extras in Android?接受的答案解释了如何使用它。

编辑:这是处理“共享偏好”的另一个来源 https://developer.android.com/training/basics/data-storage/shared-preferences.html