如何在 Xamarin 表单中使用推送通知 [英] How to use Push Notifications in Xamarin Forms
问题描述
我有一个使用 Xamarin.Forms 的应用程序，适用于 IOS、Android 和 WP 8.
I have an app using Xamarin.Forms targeting IOS, Android and WP 8.
我的应用需要推送通知功能.
I need push notification feature in my app.
我看过 pushsharp 演示，看起来很有希望.但是我看到的所有代码都是针对每个平台单独完成的.
I have seen the pushsharp demos and it seems promising. But all the codes I have seen are done separately for each platform.
我希望它在 Xamarin.Forms 项目中完成，位于 App.cs 的某处，这样我就不需要重复注册设备的代码，也不需要处理推送通知的处理方式.
I would like it to be done in the Xamarin.Forms project, somewhere in the App.cs so that I don't need to repeat the code for registering device, and handle how push notifications should be processed.
任何帮助将不胜感激.欢迎使用示例代码或教程参考.
Any help would be greatly appreciated. Sample codes or tutorial references are welcome.
编辑:我根据 Idot 的 answer 实现了它.这是我的回答的链接.
Edit : I implemented it based on Idot's answer. Here is the link for my answer.
推荐答案
我前几天刚刚实现了推送通知，在这里分享一下我的解决方案(基于PushSharp)
I just implemented push notification a few days ago, and I'll share my solution here (based on PushSharp)
分步指南:
1) 在您的共享项目中，创建一个名为 IPushNotificationRegister
1) In your shared project, create an Interface called IPushNotificationRegister
public interface IPushNotificationRegister
{
void ExtractTokenAndRegister();
}
该接口用于获取推送令牌，然后将其发送到服务器.此令牌在每个设备上都是唯一的.
This interface is used for fetching the push token and then send it to the server. this Token is unique per device.
2) 在您的共享项目中，您应该调用 ExtractTokenAndRegister(使用您最喜欢的 IOC，我在登录后立即调用).
2) In Your shared project, you should invoke ExtractTokenAndRegister (using your favorite IOC, I called it right after login).
Android 实现:
3) 添加接收器以侦听 Google GCM 服务接收的事件:
3) Add Receivers for listening to events received by Google GCM service:
a)
[BroadcastReceiver]
[IntentFilter(new[] { Intent.ActionBootCompleted })]
public class GCMBootReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
MyIntentService.RunIntentInService(context, intent);
SetResult(Result.Ok, null, null);
}
}
b)
[assembly: Permission(Name = "@PACKAGE_NAME@.permission.C2D_MESSAGE")]
[assembly: UsesPermission(Name = "android.permission.WAKE_LOCK")]
[assembly: UsesPermission(Name = "@PACKAGE_NAME@.permission.C2D_MESSAGE")]
[assembly: UsesPermission(Name = "com.google.android.c2dm.permission.RECEIVE")]
[assembly: UsesPermission(Name = "android.permission.GET_ACCOUNTS")]
[assembly: UsesPermission(Name = "android.permission.INTERNET")]
namespace Consumer.Mobile.Droid.PushNotification
{
[BroadcastReceiver(Permission = "com.google.android.c2dm.permission.SEND")]
[IntentFilter(new string[] { "com.google.android.c2dm.intent.RECEIVE" }, Categories = new string[] { "@PACKAGE_NAME@" })]
[IntentFilter(new string[] { "com.google.android.c2dm.intent.REGISTRATION" }, Categories = new string[] { "@PACKAGE_NAME@" })]
[IntentFilter(new string[] { "com.google.android.gcm.intent.RETRY" }, Categories = new string[] { "@PACKAGE_NAME@" })]
[IntentFilter (new[]{ Intent.ActionBootCompleted }, Categories = new[]{ Intent.CategoryDefault })]
public class GCMBroadcastReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
MyIntentService.RunIntentInService(context, intent);
SetResult(Result.Ok, null, null);
}
}
}
c) 添加 Intent 服务来处理通知
c) Add Intent service to process the notification
using Android.App;
using Android.Content;
using Android.Graphics;
using Android.Media;
using Android.OS;
using Android.Support.V4.App;
using Consumer.Mobile.Infra;
using Consumer.Mobile.Services.PushNotification;
using Java.Lang;
using XLabs.Ioc;
using TaskStackBuilder = Android.Support.V4.App.TaskStackBuilder;
namespace Consumer.Mobile.Droid.PushNotification
{
[Service]
public class MyIntentService : IntentService
{
private readonly ILogger _logger;
private readonly IPushNotificationService _notificationService;
private readonly IPushNotificationRegister _pushNotificationRegister;
public MyIntentService()
{
_logger = Resolver.Resolve<ILogger>();
_notificationService = Resolver.Resolve<IPushNotificationService>();
_pushNotificationRegister = Resolver.Resolve<IPushNotificationRegister>();
}
static PowerManager.WakeLock _sWakeLock;
static readonly object Lock = new object();
public static void RunIntentInService(Context context, Intent intent)
{
lock (Lock)
{
if (_sWakeLock == null)
{
// This is called from BroadcastReceiver, there is no init.
var pm = PowerManager.FromContext(context);
_sWakeLock = pm.NewWakeLock(
WakeLockFlags.Partial, "My WakeLock Tag");
}
}
_sWakeLock.Acquire();
intent.SetClass(context, typeof(MyIntentService));
context.StartService(intent);
}
protected override void OnHandleIntent(Intent intent)
{
try
{
Context context = this.ApplicationContext;
string action = intent.Action;
if (action.Equals("com.google.android.c2dm.intent.REGISTRATION"))
{
HandleRegistration(context, intent);
}
else if (action.Equals("com.google.android.c2dm.intent.RECEIVE"))
{
HandleMessage(context, intent);
}
}
finally
{
lock (Lock)
{
//Sanity check for null as this is a public method
if (_sWakeLock != null)
_sWakeLock.Release();
}
}
}
private void HandleMessage(Context context, Intent intent)
{
Intent resultIntent = new Intent(this, typeof(MainActivity));
TaskStackBuilder stackBuilder = TaskStackBuilder.Create(this);
var c = Class.FromType(typeof(MainActivity));
stackBuilder.AddParentStack(c);
stackBuilder.AddNextIntent(resultIntent);
string alert = intent.GetStringExtra("Alert");
int number = intent.GetIntExtra("Badge", 0);
var imageUrl = intent.GetStringExtra("ImageUrl");
var title = intent.GetStringExtra("Title");
Bitmap bitmap = GetBitmap(imageUrl);
PendingIntent resultPendingIntent = stackBuilder.GetPendingIntent(0, (int)PendingIntentFlags.UpdateCurrent);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
.SetAutoCancel(true) // dismiss the notification from the notification area when the user clicks on it
.SetContentIntent(resultPendingIntent) // start up this activity when the user clicks the intent.
.SetContentTitle(title) // Set the title
.SetNumber(number) // Display the count in the Content Info
.SetSmallIcon(Resource.Drawable.Icon) // This is the icon to display
.SetLargeIcon(bitmap)
.SetSound(RingtoneManager.GetDefaultUri(RingtoneType.Notification))
.SetContentText(alert); // the message to display.
// Build the notification:
Notification notification = builder.Build();
// Get the notification manager:
NotificationManager notificationManager =
GetSystemService(Context.NotificationService) as NotificationManager;
// Publish the notification:
const int notificationId = 0;
notificationManager.Notify(notificationId, notification);
}
private void HandleRegistration(Context context, Intent intent)
{
var token = intent.GetStringExtra("registration_id");
_logger.Info(this.Class.SimpleName, "Received Token : " + token);
if (_pushNotificationRegister.ShouldSendToken(token))
{
var uid = Android.Provider.Settings.Secure.GetString(MainActivity.Context.ContentResolver, Android.Provider.Settings.Secure.AndroidId);
_notificationService.AddPushToken(token, DeviceUtils.GetDeviceType(), uid);
}
}
private Bitmap GetBitmap(string url)
{
try
{
System.Net.WebRequest request =
System.Net.WebRequest.Create(url);
System.Net.WebResponse response = request.GetResponse();
System.IO.Stream responseStream =
response.GetResponseStream();
return BitmapFactory.DecodeStream(responseStream);
}
catch (System.Net.WebException)
{
return null;
}
}
}
}
d) 实现接口IPushNotificationRegister:
using Android.App;
using Android.Content;
using Consumer.Mobile.Services;
using Consumer.Mobile.Services.PushNotification;
[assembly: Permission(Name = "@PACKAGE_NAME@.permission.C2D_MESSAGE")]
[assembly: UsesPermission(Name = "@PACKAGE_NAME@.permission.C2D_MESSAGE")]
// Gives the app permission to register and receive messages.
[assembly: UsesPermission(Name = "com.google.android.c2dm.permission.RECEIVE")]
// Needed to keep the processor from sleeping when a message arrives
[assembly: UsesPermission(Name = "android.permission.WAKE_LOCK")]
[assembly: UsesPermission(Name = "android.permission.RECEIVE_BOOT_COMPLETED")]
namespace Consumer.Mobile.Droid.PushNotification
{
public class PushNotificationRegister : IPushNotificationRegister
{
public override void ExtractTokenAndRegister()
{
string senders = AndroidConfig.GCMSenderId;
Intent intent = new Intent("com.google.android.c2dm.intent.REGISTER");
intent.SetPackage("com.google.android.gsf");
intent.PutExtra("app", PendingIntent.GetBroadcast(MainActivity.Context, 0, new Intent(), 0));
intent.PutExtra("sender", senders);
MainActivity.Context.StartService(intent);
}
}
}
iOS 实现:
4) 在您的 AppDelegate 中，添加以下方法:
4) In your AppDelegate, add the following method:
a)
public override void RegisteredForRemoteNotifications(UIApplication application, NSData deviceToken)
{
var deviceTokenString = deviceToken.ToString().Replace("<","").Replace(">", "").Replace(" ", "");
var notificationService = Resolver.Resolve<IPushNotificationService>();
var pushNotificationRegister = Resolver.Resolve<IPushNotificationRegister>();
if (pushNotificationRegister.ShouldSendToken(deviceTokenString))
{
var uid = UIDevice.CurrentDevice.IdentifierForVendor.AsString();
notificationService.AddPushToken(deviceTokenString, DeviceUtils.GetDeviceType(), uid);
}
}
b) 实现 IPushNotificationRegister :
using Consumer.Mobile.Services;
using Consumer.Mobile.Services.PushNotification;
using UIKit;
namespace Consumer.Mobile.iOS.PushNotification
{
public class iOSPushNotificationRegister : IPushNotificationRegister
{
public override void ExtractTokenAndRegister()
{
const UIRemoteNotificationType notificationTypes = UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge | UIRemoteNotificationType.Sound;
UIApplication.SharedApplication.RegisterForRemoteNotificationTypes(notificationTypes);
}
}
}
关于 WP，我没有实现它.
Regarding WP, I didn't implement it.
如果您需要使用 PushSharp 在服务器端的代码，请告诉我.
If you need the code on the server side using PushSharp, let me know.
您可以在此处
这篇关于如何在 Xamarin 表单中使用推送通知的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
