我正在尝试使用RecyclerView
更新我的adapter.notifyDataSetChanged()
。当我使用按钮更新列表并在视图中反映出来时,它可以工作,但是当我从名为messageArrived()
的mqttcall函数的其他函数中调用它时,它却无法工作。
我尝试重新初始化整个列表和适配器,但是当我通过单击按钮进行操作时,当从messageArrived()
函数调用时,它仍然不起作用。
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
somefun();
}
});
public void somefun(){
Pump pump = new Pump("71xxxxxx", "East Motor", "OFF",R.drawable.motor);
pumpList.add(pump);
mAdapter.notifyDataSetChanged();
}
public void messageArrived(String topic, MqttMessage message) throws Exception {
Log.d("In main Activity","Message arrived");
String s = message.toString();
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.common_google_signin_btn_icon_dark)
.setContentTitle(topic)
.setContentText(s)
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(1, builder.build());
somefun();
}
当我收到通知时,
messageArrived()
确实得到执行,因为我收到通知。 最佳答案
尝试在adapter
中添加方法
public fun setDatass(datasList: List<Datas>){
this.datasList= datasList
notifyDataSetChanged()
}
并在
activity
或fragment
中调用它 public void somefun(){
Pump pump = new Pump("71xxxxxx", "East Motor", "OFF",R.drawable.motor);
pumpList.add(pump);
mAdapter.setDatas(pumpList);
}
关于java - mAdapter.notifyDataSetChanged()在某些情况下不起作用,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/56087320/