使用从片段列表调用的tab1类扩展片段时遇到问题。我已经完成了关于在类中使用片段的研究和信息，但是现在我不能让我的setAdapter在tab1类中工作。以下是我的代码：tab1类和XML。
public class Tab1Fragment extends Fragment implements AdapterView.OnItemClickListener {
private static final int ADD_NEW_FRIEND_ID = Menu.FIRST;
private static final int SHOW_DETAILS = 3;
private static final int EXIT_APP_ID = Menu.FIRST + 1;
public IAppManager imService = null;
private FriendListAdapter friendAdapter;
private class FriendListAdapter extends BaseAdapter
{
class ViewHolder {
TextView text;
ImageView icon;
}
private LayoutInflater mInflater;
private Bitmap mOnlineIcon;
private Bitmap mOfflineIcon;
private ListView list;
private ListView listView;
private FriendInfo[] friends = null;
public FriendListAdapter(Context context) {
super();
mInflater = LayoutInflater.from(context);
mOnlineIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.greenstar);
mOfflineIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.redstar);
}
public void setFriendList(FriendInfo[] friends)
{
this.friends = friends;
}
public int getCount() {
return friends.length;
}
public FriendInfo getItem(int position) {
return friends[position];
}
public long getItemId(int position) {
return 0;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.friend_list_screen, null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.text);
holder.icon = (ImageView) convertView.findViewById(R.id.icon);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
holder.text.setText(friends[position].userName);
holder.icon.setImageBitmap(friends[position].status == STATUS.ONLINE ? mOnlineIcon : mOfflineIcon);
return convertView;
}
}
public class MessageReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.i("Broadcast receiver ", "received a message");
Bundle extra = intent.getExtras();
if (extra != null)
{
String action = intent.getAction();
if (action.equals(IMService.FRIEND_LIST_UPDATED))
{
Tab1Fragment.this.updateData(FriendController.getFriendsInfo(),
FriendController.getUnapprovedFriendsInfo());
}
}
}
};
public MessageReceiver messageReceiver = new MessageReceiver();
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
imService = ((IMService.IMBinder)service).getService();
FriendInfo[] friends = FriendController.getFriendsInfo(); //imService.getLastRawFriendList();
if (friends != null) {
Tab1Fragment.this.updateData(friends, null); // parseFriendInfo(friendList);
}
getActivity().setTitle(imService.getUsername() + "'s friend list");
}
public void onServiceDisconnected(ComponentName className) {
imService = null;
}
};
@Override
public View onCreateView(LayoutInflater inflater,
@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.tab1fragment, container, false);
ListView list = (ListView) v.findViewById(R.id.lvn);
return v;
}
void updateData(FriendInfo[] friends, FriendInfo[] unApprovedFriends)
{
if (friends != null) {
friendAdapter.setFriendList(friends);
setAdapter(friendAdapter);
}
if (unApprovedFriends != null)
{
NotificationManager NM = (NotificationManager) getActivity().getSystemService(getActivity().NOTIFICATION_SERVICE);
if (unApprovedFriends.length > 0)
{
String tmp = new String();
for (int j = 0; j < unApprovedFriends.length; j++) {
tmp = tmp.concat(unApprovedFriends[j].userName).concat(",");
}
Notification notification = new Notification(R.drawable.stat_sample,
getText(R.string.new_friend_request_exist),
System.currentTimeMillis());
Intent i = new Intent(Tab1Fragment.this.getActivity(), UnApprovedFriendList.class);
i.putExtra(FriendInfo.FRIEND_LIST, tmp);
PendingIntent contentIntent = PendingIntent.getActivity(this.getActivity(), 0,
i, 0);
notification.setLatestEventInfo(this.getActivity(), getText(R.string.new_friend_request_exist),
"You have new friend request(s)",
contentIntent);
NM.notify(R.string.new_friend_request_exist, notification);
}
else
{
// if any request exists, then cancel it
NM.cancel(R.string.new_friend_request_exist);
}
}
}
@Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id){
onItemClick(parent, v, position, id);
// Sensor sensor = sensorAdapter.getItem(AdapterView<?> parent
Intent i = new Intent(Tab1Fragment.this.getActivity(), Messaging.class);
FriendInfo friend = friendAdapter.getItem(position);
if (friend.status == STATUS.ONLINE)
{
i.putExtra(FriendInfo.USERNAME, friend.userName);
// i.putExtra(FriendInfo.ID, friend.uid); // Edit //
i.putExtra(FriendInfo.PORT, friend.port);
i.putExtra(FriendInfo.IP, friend.ip);
startActivity(i);
}
else
{
Toast.makeText(Tab1Fragment.this.getActivity(), R.string.user_offline, Toast.LENGTH_SHORT).show();
}
}
}
标签的XML：
<?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:orientation="vertical" >
<ListView
android:id="@+id/lvn"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<TextView android:id="@+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="@string/no_friend"
android:gravity="center_vertical|center_horizontal"/>
</LinearLayout>