我需要刷新我的listView而不清除和闪烁,只需显示新项目即可。但是我不能立即这样做,因为我在几秒钟内获得了异步。该代码在过程开始时清除适配器的原因无法正常工作。
private void scanLeDevice(final boolean enable) {
if (enable) {
mLeDeviceListAdapterNew.clear();
//mLeDeviceListAdapterNew.notifyDataSetChanged();
// Stops scanning after a pre-defined scan period.
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
mScanning = false;
mBluetoothAdapter.stopLeScan(mLeScanCallback);
runOnUiThread(new Runnable(){
@Override
public void run() {
mLeDeviceListAdapterNew.notifyDataSetChanged();
scanLeDevice(true);
//invalidateOptionsMenu();
}
});
}
}, SCAN_PERIOD);
//Here my adapter updates with new items,
//but it's shouldn't be displayed until I call adapter
//refresh data in SCAN_PERIOD
您可以在设置适配器后立即致电notifyDataSetChanged();
,以反映列表的更改。例如
ListView modeList = new ListView(getActivity());
ArrayAdapter<CharSequence> adapter = ArrayAdapter
.createFromResource(getActivity(), R.array.PGA_Arrays,
R.layout.simple_spinner_item);
modeList.setAdapter(adapter);
adapter.notifyDataSetChanged();
希望这可以有所帮助。
您需要适配器中的setData方法来更新数据。在notiftyDataSetChanged
。
公共类Myadapter扩展了BaseDapter {
public MyAdapter(...) {
super(...);
}
@Override
public View getView(int position, View view, ViewGroup parent) {
.....
return view;
}
private void setData() {
...
notifyDataSetChanged();
}
}