我在Android应用中使用firebase。我正在应用中的两个用户之间挑战。当第一个用户开始挑战时，第二个玩家也会看到它，当前用户也会看到它。换句话说，我正在为两个用户创建挑战历史。清单上的我有一个奇怪的行为。有时候它可以像我所说的那样完美地工作，但是另一些时候，当新挑战添加时，它将它添加到列表中的次数是2倍或4倍或9倍。我调试了代码以查看问题是否出在适配器上，但是我发现问题出在列表大小上。我做了很多尝试，才知道这种奇怪行为的原因是什么，但我不知道。
这是带来数据并显示数据的代码：
public void startAsynkTask() {
//TODO : search for a solution to this error
AsyncTask asyncTask = new AsyncTask() {
@Override
protected Boolean doInBackground(Object[] objects) {
try {
Socket sock = new Socket();
sock.connect(new InetSocketAddress("8.8.8.8", 53), 1500);
sock.close();
return true;
} catch (IOException e) {
return false;
}
}
@Override
protected void onPostExecute(Object o) {
if ((boolean) o) {
clearLists();
ChildEventListener generalChallengesListener = new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
getChallengeData(dataSnapshot, "onChildAdded");
view.onDataFound();
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
//TODO : note that the only changing handled is when challenge moves from uncompleted to completed state
getChallengeData(dataSnapshot, "onChildChanged");
for (int i = 0; i < uncompletedChallengesList.size(); i++) {
if (uncompletedChallengesList.get(i).getId().equals(dataSnapshot.getKey())) {
uncompletedChallengesList.remove(i);
view.notifyAdapters(completedChallengesList.size(), uncompletedChallengesList.size());
break;
}
}
checkListsSizeAndAdjustViews();
view.hideProgressBar();
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
startAsynkTask();
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
//Toast.makeText(getActivity(), "فشل تحميل البيانات من فضلك تأكد من الاتصال بالانترنت", Toast.LENGTH_SHORT).show();
view.hideProgressBar();
Log.v("Logging", "error loading data : " + databaseError);
}
};
//this code gives data where current user is player 1
player1Listener = challengesReference.orderByChild("player1Uid").equalTo(currentUserUid).addChildEventListener(generalChallengesListener);
//this code gives data where current user is player 2
player2Listener = challengesReference.orderByChild("player2Uid").equalTo(currentUserUid).addChildEventListener(generalChallengesListener);
challengesReference.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
onInitialDataLoaded();
Log.v("Logging", "completed list size :" + completedChallengesList + " , uncompleted list size : " + uncompletedChallengesList);
challengesReference.removeEventListener(this);
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
} else {
view.onNoInternetConnection();
}
}
};
asyncTask.execute();
}
public String getChallengeData(DataSnapshot dataSnapshot, String tag) {
Log.v("Logging", "completedChallengesList : " + completedChallengesList.size()
+ ", uncompletedChallengesList " + uncompletedChallengesList.size());
view.startCompletedChallengesAdapter(completedChallengesList);
view.startUnCompletedChallengesAdapter(uncompletedChallengesList);
GenericTypeIndicator<List<Question>> t = new GenericTypeIndicator<List<Question>>() {
};
challenge = new Challenge();
String challengeDate = dataSnapshot.child("date").getValue().toString();
String challengeSubject = dataSnapshot.child("subject").getValue().toString();
String challengeState = dataSnapshot.child("state").getValue().toString();
String challengeId = dataSnapshot.getKey();
ArrayList challengeQuestionsList = (ArrayList) dataSnapshot.child("questionsList").getValue(t);
long player1Score = (long) dataSnapshot.child("player1score").getValue();
long player2Score = (long) dataSnapshot.child("player2score").getValue();
String player1Name = dataSnapshot.child("player1Name").getValue().toString();
String player1Image = dataSnapshot.child("player1Image").getValue().toString();
String player1Uid = dataSnapshot.child("player1Uid").getValue().toString();
String player2Name = dataSnapshot.child("player2Name").getValue().toString();
String player2Image = dataSnapshot.child("player2Image").getValue().toString();
String player2Uid = dataSnapshot.child("player2Uid").getValue().toString();
String challengerName, challengerImage;
if (player1Uid.equals(currentUserUid)) {
currentPlayer = 1;
challengerName = player2Name;
challengerImage = player2Image;
challenge.setSecondChallengerUid(player2Uid);//second means that it is not the player who starts the challenge
if (tag.equals("onChildAdded")) {
player1childrenCount++;
}
} else {
currentPlayer = 2;
challengerName = player1Name;
challengerImage = player1Image;
challenge.setSecondChallengerUid(player1Uid);//second means that it is not the player who starts the challenge
if (tag.equals("onChildAdded")) {
player2childrenCount++;
}
}
challenge.setCurrentPlayer(currentPlayer);
challenge.setChallengerName(challengerName);
challenge.setDate(challengeDate);
challenge.setImage(challengerImage);
challenge.setSubject(challengeSubject);
challenge.setState(challengeState);
challenge.setId(challengeId);
challenge.setQuestionsList(challengeQuestionsList);
String score;
if (currentPlayer == 1) {
score = player2Score + " : " + player1Score;
} else {
score = player1Score + " : " + player2Score;
}
challenge.setScore(score);
if (challenge.getState().equals("اكتمل")) {
view.showCompletedChallengesTv();
completedChallengesList.add(0, challenge);
view.notifyAdapters(completedChallengesList.size(), uncompletedChallengesList.size());
} else if (challenge.getState().equals(refusedChallengeText)) {
view.showCompletedChallengesTv();
completedChallengesList.add(0, challenge);
view.notifyAdapters(completedChallengesList.size(), uncompletedChallengesList.size());
} else if (challenge.getState().equals(uncompletedChallengeText)) {
view.showUncompletedChallengesTv();
uncompletedChallengesList.add(0, challenge);
view.notifyAdapters(completedChallengesList.size(), uncompletedChallengesList.size());
}
return player1Uid;
}
这是视图函数：
@Override
public void startUnCompletedChallengesAdapter(ArrayList uncompletedChallengesList) {
if(uncompletedChallengesRecyclerView.getAdapter() == null) {
uncompletedChallengeRecyclerAdapter = new ChallengesAdapter(uncompletedChallengesList, getActivity());
RecyclerView.LayoutManager uncompletedChallengesLayoutManager = new LinearLayoutManager(getActivity());
uncompletedChallengesRecyclerView.setLayoutManager(uncompletedChallengesLayoutManager);
uncompletedChallengesRecyclerView.setItemAnimator(new DefaultItemAnimator());
uncompletedChallengesRecyclerView.setAdapter(uncompletedChallengeRecyclerAdapter);
}
}
@Override
public void startCompletedChallengesAdapter(ArrayList completedChallengesList) {
if(completedChallengesRecyclerView.getAdapter() == null) {
completedChallengeRecyclerAdapter = new ChallengesAdapter(completedChallengesList, getActivity());
RecyclerView.LayoutManager completedChallengesLayoutManager = new LinearLayoutManager(getActivity());
completedChallengesRecyclerView.setLayoutManager(completedChallengesLayoutManager);
completedChallengesRecyclerView.setItemAnimator(new DefaultItemAnimator());
completedChallengesRecyclerView.setAdapter(completedChallengeRecyclerAdapter);
}
}
@Override
public void notifyAdapters(int completedListSize, int uncompletedListSize) {
completedChallengesRecyclerView.removeAllViews();
uncompletedChallengesRecyclerView.removeAllViews();
completedChallengeRecyclerAdapter.notifyDataSetChanged();
uncompletedChallengeRecyclerAdapter.notifyDataSetChanged();
Toast.makeText(getActivity(), "completed list size : " + completedListSize
+ ", uncompleted list size : " + uncompletedListSize, Toast.LENGTH_SHORT).show();
}
@Override
public void onDataFound() {
hideProgressBar();
noChallengesTv.setVisibility(android.view.View.GONE);
noInternetConnectionText.setVisibility(android.view.View.GONE);
}
@Override
public void hideProgressBar() {
if(progressBar.getVisibility() != View.GONE){
progressBar.setVisibility(android.view.View.GONE);
}
}
@Override
public void hideUncompletedChallengesTv() {
uncompletedChallengesTv.setVisibility(android.view.View.GONE);
}
@Override
public void hideCompletedChallengesTv() {
completeChallengesTv.setVisibility(android.view.View.GONE);
}
@Override
public void showCompletedChallengesTv() {
completeChallengesTv.setVisibility(android.view.View.VISIBLE);
}
@Override
public void showUncompletedChallengesTv() {
uncompletedChallengesTv.setVisibility(android.view.View.VISIBLE);
}
@Override
public void hideNoChallengesTv() {
noChallengesTv.setVisibility(View.GONE);
}
@Override
public void showNoChallengesTv() {
noChallengesTv.setVisibility(View.VISIBLE);
}