您好,我正在为 Android 设备开发应用程序。
我正在尝试在 Listview 上实现 Keylistener。
但是,如果我的 listview 有很多元素,则应用程序不会调用我的 Keylistener,而是使用 Listview 的默认 keylistner。你对这种情况有任何线索吗?
我正在以这种方式将 keylistner 绑定到我的列表视图。
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View v = inflater.inflate(R.layout.tv_fragment_channel_list, container);
adapter = new AdapterChannelList(getActivity(), ( (List<Category>) User.getInstance().getTV() ).get(0).getContent());
list = (ListView) v.findViewById(R.id.channelListview);
list.setAdapter(adapter);
list.setOnKeyListener(new OnKeyListener()
{
@Override
public boolean onKey(View v, int keyCode, KeyEvent event)
{
if (event.getAction() == KeyEvent.ACTION_DOWN)
{
switch (keyCode)
{
case KeyEvent.KEYCODE_DPAD_CENTER:
case KeyEvent.KEYCODE_ENTER:
{
((MainActivity) getActivity()).loadVideo(mLiveTv.get(
ListId).getUrl(),"TV");
getZappingBannerFragment().loadChannelInfo(mLiveTv.get(
ListId).getId(), true);
((MainActivity) getActivity()).findViewById(R.id.tvpannel).setVisibility(View.INVISIBLE);
MainActivity.shouldfocus = R.id.videoView1;
return true;
}
case KeyEvent.KEYCODE_DPAD_DOWN:
{
if (ListId >= /*6*/mLiveTv.size() -1)
return true;
if (ListPos == 10)
{
reduce(ListPos);
}
else if (ListId > 10)
reduce(ListPos);
else
reduce(ListId);
ListId++;
ListPos++;
if (ListPos == 10)
{
reduce(ListPos - 1);
enlarge(ListPos);
list.setSelectionFromTop(ListId, 0);
ListPos = 0;
}
else if (ListId > 10)
enlarge(ListPos);
else
enlarge(ListId);
//list.setSelectionFromTop(ListId, 0);
//list.scrollBy(0, 250);
return true;
}
case KeyEvent.KEYCODE_DPAD_UP:
{
// list.scrollBy(0, -250);
if (ListId > 0)
{
reduce(ListId);
ListId--;
ListPos--;
}
if (ListPos < 0)
{
enlarge(ListId);
list.setSelectionFromTop(ListPos, 0);
ListPos = 0;
}
else
{
enlarge(ListId);
}
//list.setSelectionFromTop(ListId, 0);
//list.setSelection(ListId);
return true;
}
case KeyEvent.KEYCODE_BACK:
{
//getZappingBannerFragment().justShow();
((MainActivity) getActivity()).findViewById(R.id.tvpannel).setVisibility(View.INVISIBLE);
((MainActivity) getActivity()).findViewById(R.id.menu_principal).setVisibility(View.VISIBLE);
MainActivity.shouldfocus = R.id.menu_principal;
return true;
}
}
}
return true;
}
});
return v;
}