我按下按钮后，电话里没有显示通知
我按下按钮后，电话里没有显示通知
提问于 2019-12-30 18:27:18
我已经写了下面的代码，据称，根据我读到的内容，它应该在我按下按钮后立即显示通知，但通知没有弹出。有人能给我解释一下原因吗？谢谢。我已经在下面添加了活动和布局的代码。
这就是活动
namespace PresentationNoti
{
[Activity(Label = "@string/app_name", Theme = "@style/AppTheme", MainLauncher = true)]
public class MainActivity : AppCompatActivity
{
Button btn1, btn2;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.activity_main);
btn1 = (Button)FindViewById(Resource.Id.btn1);
btn2 = (Button)FindViewById(Resource.Id.btn2);
btn1.Click += Btn1_Click;
btn2.Click += Btn2_Click;
}
private void Btn2_Click(object sender, System.EventArgs e)
{
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
mBuilder.SetSmallIcon(Resource.Drawable.birthday);
mBuilder.SetContentTitle("It's your birthday");
mBuilder.SetContentText("Happy B-day Birthday Boy/Girl");
Intent resultIntent = new Intent(this, typeof(MainActivity));
TaskStackBuilder stackBuilder = TaskStackBuilder.Create(this);
stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(MainActivity)));
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.AddNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.GetPendingIntent(0, (int)PendingIntentFlags.UpdateCurrent);
mBuilder.SetContentIntent(resultPendingIntent);
NotificationManager mNotificationManager = (NotificationManager)GetSystemService(Context.NotificationService);
mNotificationManager.Notify(0, mBuilder.Build());
}
private void Btn1_Click(object sender, System.EventArgs e)
{
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
mBuilder.SetSmallIcon(Resource.Drawable.birthday);
mBuilder.SetContentTitle("It's your birthday");
mBuilder.SetContentText("Happy B-day Birthday Boy/Girl");
NotificationManager mNotificationManager = (NotificationManager)GetSystemService(Context.NotificationService);
mNotificationManager.Notify(0, mBuilder.Build());
}
}
}这是axml。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#90aacc">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="basic notification"
android:textColor="#000000"
android:layout_marginTop="15dp"
android:layout_gravity="center"
android:textSize="25sp"
android:id="@+id/btn1"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="advanced notification"
android:textColor="#000000"
android:layout_marginTop="15dp"
android:layout_gravity="center"
android:textSize="25sp"
android:id="@+id/btn2"
/>
</LinearLayout>回答 1
Stack Overflow用户
回答已采纳
发布于 2019-12-30 19:08:45
根据Xamarin的文档，您应该创建一个通知通道(API >= 26)，并使用以下代码启动通知：
var notificationManager = NotificationManagerCompat.From(this);
notificationManager.Notify(NOTIFICATION_ID, builder.Build());编辑:如果你正在为API 26或更高版本编译，则创建通知通道(在这种情况下是必需的)。
附言: Full xamarin的安卓通知文档here
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/59529278
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