建立Notification

在Notification類中setLatestEventInfo()方法顯示過期，所以使用另外一種方式建立一個簡單的通知（PS:在Activity中）

NotificationManager notificationManager=(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

                                  Notification.Builder builder=new Builder(context);

                                  builder.setContentTitle("xxxx");//設置標題

                                  builder.setContentText("xxxx");//設置內容

                                  builder.setSmallIcon(com.example.pushdemo2.R.drawable.ic_launcher);//定義左邊的小圖標

                                  builder.setDefaults(Notification.DEFAULT_SOUND|Notification.DEFAULT_VIBRATE);//設置提示聲音

                                  Intent intent=new Intent(context, Main.class);

                                  PendingIntent penIntent=PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT, null);

                                  builder.setContentIntent(penIntent);//設置跳轉界面

                                  builder.setAutoCancel(true);//設置點擊通知欄後自動消失

                                  Notification notification=builder.build();

                                  notificationManager.notify(1, notification);