android service使用问题

Question

我想在应用启动service后产生一个notification，在通知栏点击notification后跳转到另一个程序，代码如下

 public class TuiService extends Service {
    public TuiService() {
        Intent intent = new Intent();
        ComponentName cn = new ComponentName("com.example.myarcbar","com.example.myarcbar.MainActivity");
        intent.setComponent(cn);

        PendingIntent pendingIntent = PendingIntent.getActivity(TuiService.this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        NotificationManager notificationManager=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(TuiService.this)
                .setSmallIcon(R.drawable.nnn)
                .setAutoCancel(true)
                .setContentTitle("NotificationTest")
                .setContentText("success")
                .setContentIntent(pendingIntent);

        notificationManager.notify(1, builder.build());
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

这段代码在activity中使用正常，可把它放到service中报错java.lang.RuntimeException: Unable to instantiate service com.example.notitest.TuiService: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Context.getPackageName()' on a null object reference

错误来自PendingIntent pendingIntent = PendingIntent.getActivity(TuiService.this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);这一行，求解答。。。

Answer 1

把这些所有的相关的放到onCreate()方法中，别放在TuiService()这里面，在TuiService()中TuiService.this为null所以报空指针了。