我正在开发一个使用Firebase作为后端的Android聊天应用。
我在onChildEventListener方法中使用queryFireChatUsers()方法来查询我的用户。问题是屏幕只显示进度条，我不在方法onChildAdded()内。
感谢您的帮助。
这是我的代码。
showProgressBarForUsers();
mListenerUsers=mFireChatUsersRef.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
Log.d(TAG, "inside onChildAdded");
//Hide progress bar
hideProgressBarForUsers();
if(dataSnapshot.exists()){
//Log.e(TAG, "A new user was inserted");
String userUid=dataSnapshot.getKey();
if(!userUid.equals(mCurrentUserUid)) {
//Get recipient user name
UsersChatModel user = dataSnapshot.getValue(UsersChatModel.class);
//Add recipient uid
user.setRecipientUid(userUid);
//Add current user (or sender) info
user.setCurrentUserEmail(mCurrentUserEmail); //email
user.setCurrentUserUid(mCurrentUserUid);//uid
mUsersKeyList.add(userUid);
mUsersChatAdapter.refill(user);
}else{
UsersChatModel currentUser = dataSnapshot.getValue(UsersChatModel.class);
String userName=currentUser.getFirstName(); //Get current user first name
String createdAt=currentUser.getCreatedAt(); //Get current user date creation
mUsersChatAdapter.setNameAndCreatedAt(userName, createdAt); //Add it the adapter
}
}
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
if(dataSnapshot.exists()) {
String userUid = dataSnapshot.getKey();
if(!userUid.equals(mCurrentUserUid)) {
UsersChatModel user = dataSnapshot.getValue(UsersChatModel.class);
// Removed bug here
//Add recipient uid
user.setRecipientUid(userUid);
//Add current user (or sender) info
user.setCurrentUserEmail(mCurrentUserEmail); //email
user.setCurrentUserUid(mCurrentUserUid);//uid
int index = mUsersKeyList.indexOf(userUid);
Log.e(TAG, "change index "+index);
mUsersChatAdapter.changeUser(index, user);
}
}
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(FirebaseError firebaseError) {
}
});
并且
mFireChatUsersRef=new Firebase(ReferenceUrl.FIREBASE_CHAT_URL).child(ReferenceUrl.CHILD_USERS);