我有一个我似乎无法诊断的奇怪错误，我有 2 个字段，一个正在从数据库中获取值，另一个没有。
我的问题是“friends[position].userPresence”没有从数据库返回任何值，但是一个名为“friends[position].userStatus”的相同值正在返回值，但是当我将 userPresence 的列名分配给 userStatus，然后 userStatus正在返回该列的正确信息。
任何帮助将不胜感激！
public class FriendList extends ListActivity {
private static final int ADD_NEW_FRIEND_ID = Menu.FIRST;
private static final int EXIT_APP_ID = Menu.FIRST + 1;
private IAppManager imService = null;
private FriendListAdapter friendAdapter;
public String ownusername = new String();
private class FriendListAdapter extends BaseAdapter {
class ViewHolder {
TextView text;
TextView status;
ImageView avatar;
ImageView onlstatus;
}
private LayoutInflater mInflater;
private Bitmap mOnlineIcon;
private Bitmap mOfflineIcon;
private Bitmap mAwayIcon;
private Bitmap mPersonPic;
private FriendInfo[] friends = null;
public FriendListAdapter(Context context) {
super();
mInflater = LayoutInflater.from(context);
mOnlineIcon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.online);
mOfflineIcon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.offline);
mAwayIcon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.away);
mPersonPic = BitmapFactory.decodeResource(context.getResources(),
R.drawable.no_photo_icon_big);
}
public void setFriendList(FriendInfo[] friends) {
this.friends = friends;
}
@Override
public int getCount() {
return friends.length;
}
@Override
public FriendInfo getItem(int position) {
return friends[position];
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// A ViewHolder keeps references to children views to avoid
// unneccessary calls
// to findViewById() on each row.
ViewHolder holder;
// When convertView is not null, we can reuse it directly, there is
// no need
// to reinflate it. We only inflate a new View when the convertView
// supplied
// by ListView is null.
if (convertView == null) {
convertView = mInflater.inflate(R.layout.friend_list_screen,
null);
// Creates a ViewHolder and store references to the two children
// views
// we want to bind data to.
holder = new ViewHolder();
holder.text = (TextView) convertView
.findViewById(R.id.userName);
holder.status = (TextView) convertView
.findViewById(R.id.userStatusMsg);
holder.onlstatus = (ImageView) convertView
.findViewById(R.id.icon_status);
holder.avatar = (ImageView) convertView.findViewById(R.id.icon);
convertView.setTag(holder);
} else {
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
// Bind the data efficiently with the holder.
holder.text.setText(friends[position].userName);
holder.onlstatus
.setImageBitmap(friends[position].userStatus == "Available" ? mOnlineIcon :
friends[position].userStatus == "Busy" ? mOfflineIcon : mAwayIcon);
holder.avatar.setImageBitmap(mPersonPic);
holder.status.setText(friends[position].userPresence);
/*
* holder.icon .setImageBitmap(friends[position].status ==
* STATUS.ONLINE ? mOnlineIcon : mOfflineIcon);
*/
return convertView;
}
}
朋友信息
public class FriendList extends ListActivity {
private static final int ADD_NEW_FRIEND_ID = Menu.FIRST;
private static final int EXIT_APP_ID = Menu.FIRST + 1;
private IAppManager imService = null;
private FriendListAdapter friendAdapter;
public String ownusername = new String();
private class FriendListAdapter extends BaseAdapter {
class ViewHolder {
TextView text;
TextView status;
ImageView avatar;
ImageView onlstatus;
}
private LayoutInflater mInflater;
private Bitmap mOnlineIcon;
private Bitmap mOfflineIcon;
private Bitmap mAwayIcon;
private Bitmap mPersonPic;
private FriendInfo[] friends = null;
public FriendListAdapter(Context context) {
super();
mInflater = LayoutInflater.from(context);
mOnlineIcon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.online);
mOfflineIcon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.offline);
mAwayIcon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.away);
mPersonPic = BitmapFactory.decodeResource(context.getResources(),
R.drawable.no_photo_icon_big);
}
public void setFriendList(FriendInfo[] friends) {
this.friends = friends;
}
@Override
public int getCount() {
return friends.length;
}
@Override
public FriendInfo getItem(int position) {
return friends[position];
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// A ViewHolder keeps references to children views to avoid
// unneccessary calls
// to findViewById() on each row.
ViewHolder holder;
// When convertView is not null, we can reuse it directly, there is
// no need
// to reinflate it. We only inflate a new View when the convertView
// supplied
// by ListView is null.
if (convertView == null) {
convertView = mInflater.inflate(R.layout.friend_list_screen,
null);
// Creates a ViewHolder and store references to the two children
// views
// we want to bind data to.
holder = new ViewHolder();
holder.text = (TextView) convertView
.findViewById(R.id.userName);
holder.status = (TextView) convertView
.findViewById(R.id.userStatusMsg);
holder.onlstatus = (ImageView) convertView
.findViewById(R.id.icon_status);
holder.avatar = (ImageView) convertView.findViewById(R.id.icon);
convertView.setTag(holder);
} else {
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
// Bind the data efficiently with the holder.
holder.text.setText(friends[position].userName);
holder.onlstatus
.setImageBitmap(friends[position].userStatus == "Available" ? mOnlineIcon :
friends[position].userStatus == "Busy" ? mOfflineIcon : mAwayIcon);
holder.avatar.setImageBitmap(mPersonPic);
holder.status.setText(friends[position].userPresence);
/*
* 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)) {
// taking friend List from broadcast
// String rawFriendList =
// extra.getString(FriendInfo.FRIEND_LIST);
// FriendList.this.parseFriendInfo(rawFriendList);
FriendList.this.updateData(
FriendController.getFriendsInfo(),
FriendController.getUnapprovedFriendsInfo());
}
}
}
};
public MessageReceiver messageReceiver = new MessageReceiver();
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className, IBinder service) {
imService = ((IMService.IMBinder) service).getService();
FriendInfo[] friends = FriendController.getFriendsInfo(); // imService.getLastRawFriendList();
if (friends != null) {
FriendList.this.updateData(friends, null); // parseFriendInfo(friendList);
}
// setTitle(imService.getUsername() + "'s friend list");
CommonUtility.setCustomTitlebar(FriendList.this, imService);
ownusername = imService.getUsername();
((LinearLayout)findViewById(R.id.actionbar_layout)).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(FriendList.this,UserProfile.class));
}
});
}
@Override
public void onServiceDisconnected(ComponentName className) {
imService = null;
Toast.makeText(FriendList.this, R.string.local_service_stopped,
Toast.LENGTH_SHORT).show();
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.list_screen);
friendAdapter = new FriendListAdapter(this);
}
public void updateData(FriendInfo[] friends, FriendInfo[] unApprovedFriends) {
if (friends != null) {
friendAdapter.setFriendList(friends);
setListAdapter(friendAdapter);
}
if (unApprovedFriends != null) {
NotificationManager NM = (NotificationManager) getSystemService(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(",");
}
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
this).setSmallIcon(R.drawable.ic_launcher) // TODO Redo
// friend
// notification
.setContentTitle(
getText(R.string.new_friend_request_exist));
/*
* Notification notification = new
* Notification(R.drawable.stat_sample,
* getText(R.string.new_friend_request_exist),
* System.currentTimeMillis());
*/
Intent i = new Intent(this, UnApprovedFriendList.class);
i.putExtra(FriendInfo.FRIEND_LIST, tmp);
PendingIntent contentIntent = PendingIntent.getActivity(this,
0, i, 0);
mBuilder.setContentText("You have new friend request(s)");
/*
* notification.setLatestEventInfo(this,
* getText(R.string.new_friend_request_exist),
* "You have new friend request(s)", contentIntent);
*/
mBuilder.setContentIntent(contentIntent);
NM.notify(R.string.new_friend_request_exist, mBuilder.build());
} else {
// if any request exists, then cancel it
NM.cancel(R.string.new_friend_request_exist);
}
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Intent i = new Intent(this, Messaging.class);
FriendInfo friend = friendAdapter.getItem(position);
i.putExtra(FriendInfo.USERNAME, friend.userName);
i.putExtra(FriendInfo.PORT, friend.port);
i.putExtra(FriendInfo.IP, friend.ip);
startActivity(i);
}
@Override
protected void onPause() {
unregisterReceiver(messageReceiver);
unbindService(mConnection);
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
bindService(new Intent(FriendList.this, IMService.class), mConnection,
Context.BIND_AUTO_CREATE);
IntentFilter i = new IntentFilter();
// i.addAction(IMService.TAKE_MESSAGE);
i.addAction(IMService.FRIEND_LIST_UPDATED);
registerReceiver(messageReceiver, i);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
boolean result = super.onCreateOptionsMenu(menu);
menu.add(0, ADD_NEW_FRIEND_ID, 0, R.string.add_new_friend);
menu.add(0, EXIT_APP_ID, 0, R.string.exit_application);
return result;
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
switch (item.getItemId()) {
case ADD_NEW_FRIEND_ID: {
Intent i = new Intent(FriendList.this, AddFriend.class);
startActivity(i);
return true;
}
case EXIT_APP_ID: {
imService.exit();
finish();
return true;
}
}
return super.onMenuItemSelected(featureId, item);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
}
}
XML 处理程序
public void startElement(String uri, String localName, String name,
Attributes attributes) throws SAXException {
if (localName == "friend") {
FriendInfo friend = new FriendInfo();
friend.userName = attributes.getValue(FriendInfo.USERNAME);
String status = attributes.getValue(FriendInfo.STATUS);
friend.ip = attributes.getValue(FriendInfo.IP);
friend.port = attributes.getValue(FriendInfo.PORT);
friend.userPresence = attributes.getValue(FriendInfo.USER_PRESENCE);
friend.userStatus = attributes.getValue(FriendInfo.USER_STATUS);
friend.userDisplayName = attributes.getValue(FriendInfo.USER_DISPNAME);
friend.userKey = attributes.getValue(FriendInfo.USER_KEY);
friend.expire = attributes.getValue("expire");
if (status != null && status.equals("online")) {
friend.status = STATUS.ONLINE;
mOnlineFriends.add(friend);
} else if (status.equals("unApproved")) {
friend.status = STATUS.UNAPPROVED;
mUnapprovedFriends.add(friend);
} else {
friend.status = STATUS.OFFLINE;
mFriends.add(friend);
}
} else if (localName == "user") {
this.userKey = attributes.getValue(FriendInfo.USER_KEY);
} else if (localName == "message") {
MessageInfo message = new MessageInfo();
message.userid = attributes.getValue(MessageInfo.USERID);
message.sendt = attributes.getValue(MessageInfo.SENDT);
message.messagetext = attributes.getValue(MessageInfo.MESSAGETEXT);
Log.i("MessageLOG", message.userid + message.sendt
+ message.messagetext);
mUnreadMessages.add(message);
}
super.startElement(uri, localName, name, attributes);
}
FriendInfo 类 public 类 FriendInfo {
public static final String FRIEND_LIST = "friendList";
public static final String USERNAME = "username";
public static final String IP = "IP";
public static final String PORT = "port";
public static final String USER_KEY = "userKey";
public static final String USER_DISPNAME = "displayname";
public static final String MESSAGE = "message"; // this should not be in
// here
public static final String STATUS = "status";
public static final String USER_STATUS = "status_msg";
public static final String USER_PRESENCE = "status_msg2";
public STATUS status;
public String userStatus;
public String userPresence;
public String userDisplayName;
public String userName;
public String ip;
public String port;
public String userKey;
public String expire;
};