如何在SharedPreferences中保存推送通知数据并在RecyclerView中显示

Question

我已经创建了一个从PushBots接收推送通知的应用程序。

我正在成功地接收推送通知，但我希望将推送数据存储在SharedPreferences中，并将其显示为另一个包含RecyclerView的活动。

我知道内容提供商是一种更好的方法，但我现在想坚持使用SharedPreferences。

这是我定制的广播接收器

public class customHandler extends BroadcastReceiver
{
    private static final String TAG = "customHandler";
    @Override
    public void onReceive(Context context, Intent intent)
    {
        String action = intent.getAction();
        Log.d(TAG, "action=" + action);
        // Handle Push Message when opened
        if (action.equals(PBConstants.EVENT_MSG_OPEN)) {
            //Check for Pushbots Instance
            Pushbots pushInstance = Pushbots.sharedInstance();
            if(!pushInstance.isInitialized()){
                Log.d("Initializing Pushbots.");
                Pushbots.sharedInstance().init(context.getApplicationContext());
            }

            //Clear Notification array
            if(PBNotificationIntent.notificationsArray != null){
                PBNotificationIntent.notificationsArray = null;
            }

            HashMap<?, ?> PushdataOpen = (HashMap<?, ?>) intent.getExtras().get(PBConstants.EVENT_MSG_OPEN);
            Log.w(TAG, "User clicked notification with Message: " + PushdataOpen.get("message"));

            //Report Opened Push Notification to Pushbots
            if(Pushbots.sharedInstance().isAnalyticsEnabled()){
                Pushbots.sharedInstance().reportPushOpened( (String) PushdataOpen.get("PUSHANALYTICS"));
            }

            //Start Main Activity On CLicking Notification
            String packageName = context.getPackageName();
            Intent resultIntent = new Intent(context.getPackageManager().getLaunchIntentForPackage(packageName));
            resultIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK| Intent.FLAG_ACTIVITY_CLEAR_TASK);

            resultIntent.putExtras(intent.getBundleExtra("pushData"));
            Pushbots.sharedInstance().startActivity(resultIntent);

            // Handle Push Message when received
        }else if(action.equals(PBConstants.EVENT_MSG_RECEIVE)){
            HashMap<?, ?> PushdataOpen = (HashMap<?, ?>) intent.getExtras().get(PBConstants.EVENT_MSG_RECEIVE);
            Log.w(TAG, "User Received notification with Message: " + PushdataOpen.get("message"));
        }
    }
}

Answer 1

创建一个自定义的PushData类，并使用Gson库将数据保存为字符串。

这里是一个干净的示例

Answer 2

试试看。

public void addNotification(String notification) {
    // get old notifications
    String oldNotifications = getNotifications();
    if (oldNotifications != null) {
        oldNotifications += "|" + notification;
    } else {
        oldNotifications = notification;
    }
    editor.putString(KEY_NOTIFICATIONS, oldNotifications);
    editor.commit();
}

public String getNotifications() {
    return pref.getString(KEY_NOTIFICATIONS, null);
}

然后得到它

String oldNotification = AppController.getInstance().getPrefManager().getNotifications();
List<String> messages = Arrays.asList(oldNotification.split("\\|"));

Answer 3

用于在SharedPreferences中放置字符串：

SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString(key, value);
editor.commit();

用于获取片段中的共享首选项：

SharedPreferences prefs = getActivity().getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE); 
String name = prefs.getString(key, "default value");