-1
私はexpandable recyclerviewライブラリ（this）を使用しています。このrecyclerviewを作成するために、私はfirebaseバックエンドサービスを使用しています。私はこの拡張可能なrecyclerviewを使用してチャットユーザーを表示し、それは動作します。しかし、私の問題は、一部の人々がオンライン状態をオフライン状態に変更したり、逆の場合に、私のrecyclerviewの更新とオンライン状態の変更後に展開されたすべてのグループが崩壊したことです。拡張可能なrecyclerviewとfirebase
マイコード：
ViewHolder
GroupHolder
public class ClubNameViewHolder extends GroupViewHolder {
View view;
TextView clubName2;
CircleImageView clubLogoImg;
TextView onlineTexview;
FirebaseDatabase mDatabase;
public ClubNameViewHolder(View itemView) {
super(itemView);
view = itemView;
clubName2 = (TextView) view.findViewById(R.id.clubName_Users);
clubLogoImg = (CircleImageView) view.findViewById(R.id.parent_club_logo);
onlineTexview = (TextView) view.findViewById(R.id.parent_online_text);
}
public void setClubTitle(ExpandableGroup club) {
if (club instanceof UserChatGroup) {
clubName2.setText(club.getTitle());
Picasso.with(itemView.getContext()).load(((UserChatGroup) club).getClubLogo()).into(clubLogoImg);
onlineTexview.setText(((UserChatGroup) club).getOnline());
}
}
}
ChildHolder
public class UsersChatViewHolder extends ChildViewHolder {
View view;
TextView usernameUser;
CircleImageView flagUser;
CircleImageView profileImageUser;
ImageView onlineImage;
FirebaseAuth mAuth;
public UsersChatViewHolder(View itemView) {
super(itemView);
view = itemView;
usernameUser = (TextView) view.findViewById(R.id.usernameUsers);
flagUser = (CircleImageView) view.findViewById(R.id.flagUsers);
profileImageUser = (CircleImageView) view.findViewById(R.id.profileUsers);
onlineImage = (ImageView) view.findViewById(R.id.onlineStatus);
mAuth = FirebaseAuth.getInstance();
}
public void setOnlineImage(){
Log.i("online", String.valueOf(MainPage.myClubName));
Log.i("online", String.valueOf(mAuth.getCurrentUser().getUid()));
final DatabaseReference onlineReference = FirebaseDatabase.getInstance().getReference().child("UsersChat").child(MainPage.myClubName).child(mAuth.getCurrentUser().getUid());
onlineReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
boolean isOnline = (boolean) dataSnapshot.child("online").getValue();
Log.i("online", String.valueOf(isOnline));
if (isOnline){
onlineImage.setVisibility(View.VISIBLE);
} else {
onlineImage.setVisibility(View.GONE);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
public void setUsername (String username){
usernameUser.setText(username);
}
public void setFlag(Context ctx, String flag){
GenericRequestBuilder<Uri, InputStream, SVG, PictureDrawable> requestBuilder;
requestBuilder = Glide
.with(ctx)
.using(Glide.buildStreamModelLoader(Uri.class, ctx), InputStream.class)
.from(Uri.class)
.as(SVG.class)
.transcode(new SvgDrawableTranscoder(), PictureDrawable.class)
.sourceEncoder(new StreamEncoder())
.cacheDecoder(new FileToStreamDecoder<SVG>(new SearchableCountry.SvgDecoder()))
.decoder(new SearchableCountry.SvgDecoder())
.animate(android.R.anim.fade_in);
Uri uri = Uri.parse(flag);
requestBuilder
// SVG cannot be serialized so it's not worth to cache it
.diskCacheStrategy(DiskCacheStrategy.SOURCE)
.load(uri)
.into(flagUser);
}
public void setProfileImage(Context ctx, String proifleImage){
Picasso.with(ctx).load(proifleImage).into(profileImageUser);
}
}
モデル
UsersModel
public class UserChat {
String username;
String flag;
String profileImage;
public UserChat(String username, String flag, String profileImage) {
this.username = username;
this.flag = flag;
this.profileImage = profileImage;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getFlag() {
return flag;
}
public void setFlag(String flag) {
this.flag = flag;
}
public String getProfileImage() {
return profileImage;
}
public void setProfileImage(String profileImage) {
this.profileImage = profileImage;
}
}
グループモデル
public class UserChatGroup extends ExpandableGroup {
String clubLogo;
String online;
public UserChatGroup(String title, List items,String clubLogo,String online) {
super(title, items);
this.clubLogo = clubLogo;
this.online = online;
}
public String getClubLogo() {
return clubLogo;
}
public void setClubLogo(String clubLogo) {
this.clubLogo = clubLogo;
}
public String getOnline() {
return online;
}
public void setOnline(String online) {
this.online = online;
}
}
アダプタ
public class ClubNameChatAdapter extends ExpandableRecyclerViewAdapter<ClubNameViewHolder, UsersChatViewHolder> {
Context ctx;
public ClubNameChatAdapter(List<? extends ExpandableGroup> groups, Context ctx) {
super(groups);
this.ctx = ctx;
}
@Override
public ClubNameViewHolder onCreateGroupViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.parent_layout_users, parent, false);
return new ClubNameViewHolder(view);
}
@Override
public UsersChatViewHolder onCreateChildViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.child_layout_users, parent, false);
return new UsersChatViewHolder(view);
}
@Override
public void onBindChildViewHolder(UsersChatViewHolder holder, int flatPosition, ExpandableGroup group, int childIndex) {
UserChat userChat = (UserChat) group.getItems().get(childIndex);
holder.setUsername(userChat.getUsername());
holder.setFlag(ctx, userChat.getFlag());
holder.setProfileImage(ctx, userChat.getProfileImage());
holder.setOnlineImage();
}
@Override
public void onBindGroupViewHolder(ClubNameViewHolder holder, int flatPosition, ExpandableGroup group) {
holder.setClubTitle(group);
}
}
断片
public class FragmentChatUsers extends Fragment {
RecyclerView userRecylerView;
ClubNameChatAdapter adapter;
List<UserChatGroup> clubName;
DatabaseReference userReference;
String profileImage;
String username;
String flag;
String clubNameLogo;
boolean isOnline;
int numberOnline;
String online;
public void getClubName() {
userReference = FirebaseDatabase.getInstance().getReference().child("UsersChat");
userReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
clubName = new ArrayList<UserChatGroup>();
for (final DataSnapshot snapshot : dataSnapshot.getChildren()){
final String clubNameString = snapshot.getKey().toString();
DatabaseReference chatReference = FirebaseDatabase.getInstance().getReference().child("UsersChat").child(clubNameString);
chatReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
final List<UserChat> userChats = new ArrayList<UserChat>();
numberOnline = 0;
for (DataSnapshot snapshot1 : dataSnapshot.getChildren()) {
username = String.valueOf(snapshot1.child("username").getValue());
profileImage = String.valueOf(snapshot1.child("profileImage").getValue());
flag = String.valueOf(snapshot1.child("flag").getValue());
clubNameLogo = String.valueOf(snapshot1.child("favoriteClubLogo").getValue());
isOnline = (boolean) snapshot1.child("online").getValue();
if (isOnline){
numberOnline++;
}
online = String.valueOf(numberOnline);
userChats.add(new UserChat(username, flag, profileImage));
}
clubName.add(new UserChatGroup(clubNameString, userChats, clubNameLogo, online));
adapter = new ClubNameChatAdapter(clubName, getContext());
userRecylerView.setLayoutManager(new LinearLayoutManager(getContext()));
userRecylerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
@Override
public void onStart() {
super.onStart();
DatabaseReference setOfline = FirebaseDatabase.getInstance().getReference().child("UsersChat").child(MainPage.myClubName).child(MainPage.uid);
setOfline.child("online").setValue(true);
}
@Override
public void onDestroy() {
super.onDestroy();
DatabaseReference setOfline = FirebaseDatabase.getInstance().getReference().child("UsersChat").child(MainPage.myClubName).child(MainPage.uid);
setOfline.child("online").setValue(false);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_chat_users,container,false);
userRecylerView = (RecyclerView) view.findViewById(R.id.chatUserRecView);
getClubName();
return view;
}
}