Notification Builder无法接受“this”作为“context”的替代，为什么？

Question

如何解决此问题？如果我用this替换它。它在建造者上创造了更多的错误。我如何解决它？

java类中的所有代码。在这种情况下，功能围绕onStartCommand旋转。

public class MyNotificationService extends Service { 

    @Override 
    public IBinder onBind(Intent arg0) { 
     // TODO Auto-generated method stub 
     return null; 
    } 

    @Override 
    public void onCreate() { 
     // TODO Auto-generated method stub 
     super.onCreate(); 
     Toast.makeText(this, "OnCreate()", Toast.LENGTH_SHORT).show(); 
    } 

    @Override 
    public void onDestroy() { 
     // TODO Auto-generated method stub 
     super.onDestroy(); 
     Toast.makeText(this, "OnDestroy()", Toast.LENGTH_SHORT).show(); 
    } 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     // TODO Auto-generated method stub 
     Toast.makeText(this, "OnStartCommand()", Toast.LENGTH_SHORT).show(); 
     NotificationManager notificationmanager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE); 
     Intent notificationintent = new Intent(this, Reminder_2.class); 
     PendingIntent pendingintent = PendingIntent.getActivity(this, 0, notificationintent, 0); 
     int icon=R.drawable.ic_launcher; 
     long when=System.currentTimeMillis(); 
     Notification.Builder builder = new Builder(this); 
     builder.setContentIntent(pendingintent); 
     builder.setAutoCancel(true); 
     builder.setSmallIcon(icon); 
     builder.setWhen(when); 
     builder.setTicker("Notification"); 
     builder.setContentTitle("Title"); 
     builder.setContentText("Content"); 
     Notification notification = builder.build(); 
     notificationmanager.notify(033, notification); 
     return super.onStartCommand(intent, flags, startId); 
    } 


} 

Answer 1

// try this 
Notification.Builder builder = new Notification.Builder(this); 

Answer 2

使用getApplicationContext()而不是this

Answer 3

我想你已经使用了错误的生成器类，请尝试以下，

Notification noti = new Notification.Builder(this) 
    .setContentTitle("New mail from " + sender.toString()) 
    .setContentText(subject) 
    .setSmallIcon(R.drawable.new_mail) 
    .setLargeIcon(aBitmap) 
    .build(); 

参考： android developer site, Notification.Builder

希望可以帮到你。