Question

我正在尝试从JSON对象加载时间列表，并希望每天在特定时间显示计划通知（在JSON对象中提到）。

要在我的应用中启用此功能，任何人都可以指导我做什么以及如何实现它？

我尝试过简单的AlarmManager和广播接收器，但这并没有触发简单的通知。

所以我的代码如下所示，任何人都可以在下面的代码中指导我，感谢您的帮助。

下面的

是AlarmReceiver.cs类

[BroadcastReceiver(Enabled = true)]
[IntentFilter(new string[] { "android.intent.action.BOOT_COMPLETED" }, Priority = (int)IntentFilterPriority.LowPriority)]
public class AlarmReceiver : BroadcastReceiver
{

    public override void OnReceive(Context context, Intent intent)
    {
        Intent notificationIntent = new Intent(context, Java.Lang.Class.FromType(typeof(NotificationActivity)));

    TaskStackBuilder stackBuilder = TaskStackBuilder.Create(context);
    stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(NotificationActivity)));
    stackBuilder.AddNextIntent(notificationIntent);

    PendingIntent pendingIntent = stackBuilder.GetPendingIntent(0,PendingIntentFlags.UpdateCurrent);

    Notification.Builder builder = new Notification.Builder(context);

    Notification notification = builder.SetContentTitle("Demo App Notification")
            .SetContentText("New Notification From Demo App..")
            .SetTicker("New Message Alert!")
            .SetSmallIcon(Resource.Drawable.Icon)
            .SetContentIntent(pendingIntent).Build();

    NotificationManager notificationManager = (NotificationManager)context.GetSystemService(Context.NotificationService);
    notificationManager.Notify(0, notification);
    }
}

主要活动

[Activity(Label = "AlarmService", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
    int count = 1;

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);

        AlarmManager alarmManager = (AlarmManager)GetSystemService(Context.AlarmService);

        Intent notificationIntent = new Intent("android.media.action.DISPLAY_NOTIFICATION");
        notificationIntent.AddCategory("android.intent.category.DEFAULT");

        PendingIntent broadcast = PendingIntent.GetService(this, 100, notificationIntent, PendingIntentFlags.UpdateCurrent);

        Calendar cal = Calendar.GetInstance(Locale.Default);
        cal.Add(CalendarField.Second, 1);
        alarmManager.SetExact(AlarmType.RtcWakeup, cal.TimeInMillis, broadcast);
    }
}

通知活动

namespace AlarmService
{
[Activity(Label = "NotificationActivity")]
public class NotificationActivity : Activity
{
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.notification_activity);
        // Create your application here
    }
}

}

在Xamarin中修改了menifest文件

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="AlarmService.AlarmService" android:versionCode="1" android:versionName="1.0">
<uses-sdk android:minSdkVersion="16" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission>

<application android:label="AlarmService"></application>
 <receiver android:name=".AlarmReceiver" >
     <intent-filter>
       <action android:name="NOTIFICATION_SERVICE" />
     </intent-filter>
 </receiver>

Xamarin - Android每日预定通知在后台

0 个答案: