【发布时间】：2014-03-17 15:31:44
【问题描述】：
我的问题是列表视图中的最后一项没有显示，即使它已添加到适配器以及列表中，因为我可以看到适配器中的项目数是好的。是布局的问题吗？这是我的布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/golive_bg"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<EditText
android:id="@+id/Room"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10" >
<requestFocus android:layout_width="wrap_content" />
</EditText>
<Button
android:id="@+id/Search1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Search" />
<ImageButton
android:id="@+id/CreateRoomimageButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/closed_doorplus" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ListView
android:id="@+id/listRooms"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fastScrollEnabled="true"
android:transcriptMode="alwaysScroll">
</ListView>
</LinearLayout>
</LinearLayout>
这是我的课堂活动
public class chatRoomsListActivity extends Activity implements OnScrollListener {
private static String Password;
private ListView lv;
private static Collection<HostedRoom> rooms;
private static ArrayList<String> Roomlist = new ArrayList<String>();
private static Handler mHandler = new Handler();
private Button SearchButton;
private ImageButton CreateButton;
private EditText EditTextSearch;
private String Search;
private String RoomName;
private static ChatRoomListAdapter adapter;
private static String Nickname="";
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.chat_rooms);
SearchButton=(Button)findViewById(R.id.Search1);
CreateButton=(ImageButton)findViewById(R.id.CreateRoomimageButton);
lv = (ListView) findViewById(R.id.listRooms);
adapter = new ChatRoomListAdapter(getApplicationContext(),
R.layout.chat_rooms_wrapper);
lv.setAdapter(adapter);
//ScrollView.measureChildWithMargins();
try {
populate_RoomList();
} catch (XMPPException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
addListenerOnButton();
/*
arrayAdapter = new ArrayAdapter<String>(
this,android.R.layout.simple_list_item_1,Roomlist);
lv.setAdapter(arrayAdapter);
*/
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parnet,
android.view.View view,
int position, long id) {
setRoomName(ChatRoomListAdapter.getItemName(position));
showOptionDialog();
}
});
addListenerOnButton();
}
public void addListenerOnButton() {
final Context context = this;
CreateButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
createRoomDialog();
}
});
SearchButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
EditTextSearch=(EditText) findViewById(R.id.Room);
Search=EditTextSearch.getText().toString();
//Search=Search.concat("*");
try {
// populate_RoomList();
getSearchlist();
// updateList();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
public void getSearchlist() throws XMPPException{
Roomlist.clear();
adapter.clear();
ChatRoomListAdapter.getChatRoom().clear();
rooms=getHostedRooms(MyService.getConnection(),"conference."+
MyService.getDomain());
System.out.println("in getsearch");
for (HostedRoom h : rooms)
{
System.out.println(h.getName().toString()+" contain " +Search);
if(h.getName().toString().contains(Search)){
System.out.println("roomlist= " +h.getJid().toString());
Roomlist.add(h.getName());
System.out.println("ChatRooms.IsRoomPassProtected(h.getName())==
"+ChatRooms.IsRoomPassProtected(h.getName()));
if(ChatRooms.IsRoomPassProtected(h.getName())==true){
adapter.add(new ChatRoom(h.getName(),true));
}
else if(ChatRooms.IsRoomPassProtected(h.getName())==false){
adapter.add(new ChatRoom(h.getName(),false));
}
}
}
System.out.println("Adapter count="+adapter.getCount());
}
private void populate_RoomList() throws XMPPException {
//chatRoomsList.getRooms();"
Roomlist.clear();
adapter.clear();
//rooms.clear();
ChatRoomListAdapter.getChatRoom().clear();
rooms=getHostedRooms(MyService.getConnection(),"conference."+
MyService.getDomain());
//System.out.println(rooms.iterator().next().getName());
for (HostedRoom h : rooms)
{
System.out.println("roomlist= " +h.getName().toString());
Roomlist.add(h.getName());
System.out.println("ChatRooms.IsRoomPassProtected(h.getName())==
"+ChatRooms.IsRoomPassProtected(h.getName()));
if(ChatRooms.IsRoomPassProtected(h.getName())==true){
adapter.add(new ChatRoom(h.getName(),true));
}
else if(ChatRooms.IsRoomPassProtected(h.getName())==false){
adapter.add(new ChatRoom(h.getName(),false));
}
}
System.out.println("Adapter count="+adapter.getCount());
}
public void setRoomName(String roomName) {
RoomName = roomName;
}
public static Collection<HostedRoom> getHostedRooms(Connection connection, String serviceName)
throws XMPPException {
List<HostedRoom> answer = new ArrayList<HostedRoom>();
ServiceDiscoveryManager discoManager = new
ServiceDiscoveryManager(connection);
DiscoverItems items = discoManager.discoverItems(serviceName);
for (Iterator<DiscoverItems.Item> it = items.getItems(); it.hasNext();) {
answer.add(new HostedRoom(it.next()));
}
return answer;
}
}
这是我的自定义适配器
public class ChatRoomListAdapter extends ArrayAdapter<ChatRoom> {
private TextView name;
private static List<ChatRoom> ChatRoom = new ArrayList<ChatRoom>();
private LinearLayout wrapper;
private ImageView lock;
public ChatRoomListAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
}
public static List<ChatRoom> getChatRoom() {
return ChatRoom;
}
public static void setChatRoom(List<ChatRoom> chatRoom) {
ChatRoom = chatRoom;
}
public ChatRoom getItem(int index) {
return ChatRoomListAdapter.ChatRoom.get(index);
}
public static String getItemName(int index) {
return ChatRoomListAdapter.ChatRoom.get(index).name;
}
public static void setfriends(List<Friends> friends) {
FriendListAdapter.setFriends(friends);
}
public void add(ChatRoom object) {
System.out.println("IN Chat room list adapter "+" addded");
ChatRoomListAdapter.ChatRoom.add(object);
super.add(object);
}
public void remove(ChatRoom object) {
ChatRoom.remove(object);
super.remove(object);
}
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
if (row == null) {
LayoutInflater inflater = (LayoutInflater)
this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.chat_rooms_wrapper, parent, false);
}
wrapper = (LinearLayout) row.findViewById(R.id.C_R_wrapper);
name = (TextView) row.findViewById(R.id.C_R_RoomName);
lock=(ImageView)row.findViewById(R.id.C_R_Lock);
try {
Log.d("Chat room adapter", "heere");
ChatRoom CR= getItem(position);
System.out.println("name= "+CR.name);
name.setText(CR.name);
if(CR.lock==true)
{
lock.setImageResource(R.drawable.lock_lock_icon);
}else{
lock.setImageResource(R.drawable.lock_unlock_icon);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return row;
}
public Bitmap decodeToBitmap(byte[] decodedByte) {
return BitmapFactory.decodeByteArray(decodedByte, 0, decodedByte.length);
}
}
提前致谢。
【问题讨论】：
-
没有代码很难说。可能你没有调用 adapter.notifyDataSetChanged()。
-
是的，我添加了代码。查看我的编辑@smittey
标签： android android-layout listview android-listview