將應(yīng)用程序更新到 API 28 后，我的 RecyclerView 出現(xiàn)了奇怪的效果。我有一個(gè)搜索按鈕，可以觸發(fā)對(duì)我所在區(qū)域的 Wifi 設(shè)備的搜索。這些項(xiàng)目不再直接顯示在列表中。我必須關(guān)閉并重新打開應(yīng)用程序才能獲得正確的顯示。我有一個(gè)在按下按鈕時(shí)應(yīng)該顯示的吐司。Toast 消息也僅在關(guān)閉和打開應(yīng)用程序后顯示。活動(dòng).kt   private fun setFloatingSearchButton() {        floating_button_discover_devices.setOnClickListener { view ->            Snackbar.make(view, "Search for new devices ...",                    Snackbar.LENGTH_SHORT).setAction("Action", null).show()            discoverDevices()            registerReceiver(mWifiReceiver, IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION))            mWifiManager!!.startScan()        }    }WifiAdapter.javapublic class WifiAdapter extends RecyclerView.Adapter<WifiAdapter.ViewHolder> {    private final int CONFIGURE_DEVICE_REQUEST_CODE = 0x00000001;    private static final String TAG = "WifiAdapter";    private List<DeviceWifiTo> wifis;    private Context context;    private Activity activity;    public WifiAdapter(List<DeviceWifiTo> wifis) {        this.wifis = wifis;    }    @Override    public WifiAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        context = parent.getContext();        activity = (Activity) context;        LayoutInflater inflater = LayoutInflater.from(context);        View wifiView = inflater.inflate(R.layout.item_wifi, parent, false);        return new WifiAdapter.ViewHolder(wifiView);    }    @Override    public void onBindViewHolder(WifiAdapter.ViewHolder holder, int position) {        DeviceWifiTo wifi = wifis.get(position);        Log.d(TAG, wifi.getSsid());        TextView wifiName = holder.wifiName;        wifiName.setText(wifi.getSsid());        CardView cardView = holder.cardView;        cardView.setOnClickListener(view -> {            Intent intent = new Intent(context, ConfigureDeviceActivity.class);            intent.putExtra("ssid", wifi.getSsid());            activity.startActivityForResult(intent, CONFIGURE_DEVICE_REQUEST_CODE);        });    }