PreferenceManager.GetDefaultSharedPreferences(Context?) 已过时：已弃用

Question

我最近更新了我的 Android 项目中的 nugget 包，现在我在这行代码中收到一条消息：

 ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences(Application.Context);

CS0618：PreferenceManager.GetDefaultSharedPreferences（上下文？）已过时：已弃用

enter image description here

有必要改变什么吗？我的代码不会像这样正常工作吗？我应该完全删除 private void storeToken(String token) 吗？我不确定我是否还需要 private void storeToken(String token).

    using System;
    using Android.App;
    using Android.Content;
    using Android.Util;
    using Firebase.Messaging;
    using System.Collections.Generic;
    using Android.Preferences;
    using Android.Media;
    using AndroidX.Core.App;

    namespace AndroidVersion
    {
    [Service]
    [IntentFilter(new[] { "com.google.firebase.MESSAGING_EVENT" })]
    public class MyFirebaseMessagingService : FirebaseMessagingService
    {
        const string TAG = "MyFirebaseMsgService";

        public override void OnNewToken(string token)
        {
            Log.Debug(TAG, "Refreshed token: " + token);
            storeToken(token);
        }

        private void storeToken(String token)
        {
            //saving the token on shared preferences
            ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences(Application.Context);
            ISharedPreferencesEditor editor = prefs.Edit();
            editor.PutString("my_token", token);
            editor.Apply();
        }

        public override void OnMessageReceived(RemoteMessage message)
        {
            Log.Debug(TAG, "From: " + message.From);
            var body = message.GetNotification().Body;
            var title = message.GetNotification().Title;
            Log.Debug(TAG, "Notification Message Body: " + message.GetNotification().Body);
            SendNotification(body, title, message.Data);
        }

        void SendNotification(string messageBody, string Title, IDictionary<string, string> data)
        {
            var intent = new Intent(this, typeof(Activity1));
            intent.AddFlags(ActivityFlags.ClearTop);
            foreach (var key in data.Keys)
            {
                intent.PutExtra(key, data[key]);
            }

            var pendingIntent = PendingIntent.GetActivity(this,
                                                          Activity1.NOTIFICATION_ID,
                                                          intent,
                                                          PendingIntentFlags.OneShot);

            var notificationBuilder = new NotificationCompat.Builder(this, Activity1.CHANNEL_ID)
                                      .SetSmallIcon(Resource.Drawable.Icon)
                                      .SetContentTitle(Title)
                                      .SetContentText(messageBody)
                                      .SetSound(RingtoneManager.GetDefaultUri(RingtoneType.Notification))
                                      .SetVibrate(new long[] { 1000, 1000, 0, 0, 0 })
                                      .SetLights(Android.Graphics.Color.Red, 3000, 3000)
                                      .SetPriority((int)NotificationPriority.High)
                                      .SetAutoCancel(true)
                                      .SetContentIntent(pendingIntent);

            var notificationManager = NotificationManagerCompat.From(this);
            notificationManager.Notify(Activity1.NOTIFICATION_ID, notificationBuilder.Build());
        }
    }
}

Answer 1

是的，它已被弃用。使用 AndroidX 偏好库在所有设备上实现一致的行为。

您可以使用 PreferenceManager 的 AndroidX 支持库版本，即 androidx.preference.PreferenceManager 而不是 android.preference.PreferenceManager.

记得将以下内容添加到您的build.gradle。

implementation 'androidx.preference:preference:1.1.1'

Answer 2

使用using AndroidX.Preference;代替using Android.Preferences;

Answer 3

我用implementation 'androidx.preference:preference-ktx:1.1.1' 在我的项目

中成功替换了已弃用的 android.preference.PreferenceManager

PreferenceManager.GetDefaultSharedPreferences(Context?) 已过时：已弃用

PreferenceManager.GetDefaultSharedPreferences(Context?) is obsolete: deprecated

c#

android

firebase-cloud-messaging