Java 检测到firebase数据库更改时，“我的活动”转到上一个活动
这是包含recyclerView的片段，它导致聊天活动Java 检测到firebase数据库更改时，“我的活动”转到上一个活动,java,android,database,firebase,fragment,Java,Android,Database,Firebase,Fragment,这是包含recyclerView的片段，它导致聊天活动 public class FragmentBusinessHome extends Fragment { /* For to do adapter */ private List<String> namesToDo; private List<String> uids; private List<String> servicesNames; private AdapterToDo adapterToDo;
public class FragmentBusinessHome extends Fragment {
/* For to do adapter */
private List<String> namesToDo;
private List<String> uids;
private List<String> servicesNames;
private AdapterToDo adapterToDo;
private RecyclerView toDoRecyclerView;
/* For checking requests adapter */
private List<String> userUids;
private List<String> serviceNames;
private List<String> userNames;
private AdapterPendingRequests adapterPendingRequests;
private RecyclerView pendingRequestsRecyclerView;
private FirebaseAuth mAuth;
public FragmentBusinessHome(){
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_business_home, container, false);
mAuth = FirebaseAuth.getInstance();
namesToDo = new ArrayList<>();
uids = new ArrayList<>();
servicesNames = new ArrayList<>();
userUids = new ArrayList<>();
serviceNames = new ArrayList<>();
userNames = new ArrayList<>();
toDoRecyclerView = view.findViewById(R.id.toDoRecyclerView);
pendingRequestsRecyclerView = view.findViewById(R.id.requestsToApproveRecyclerView);
LinearLayoutManager layoutManagerActive = new LinearLayoutManager(getActivity());
layoutManagerActive.setStackFromEnd(true);
layoutManagerActive.setReverseLayout(true);
toDoRecyclerView.setLayoutManager(layoutManagerActive);
LinearLayoutManager layoutManagerPendingRequests = new LinearLayoutManager(getActivity());
layoutManagerPendingRequests.setStackFromEnd(true);
layoutManagerPendingRequests.setReverseLayout(true);
pendingRequestsRecyclerView.setLayoutManager(layoutManagerPendingRequests);
String uid = FirebaseAuth.getInstance().getCurrentUser().getUid();
DatabaseReference checkRequests = FirebaseDatabase.getInstance().getReference("Providers").child(uid).child("Gigs");
checkRequests.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot ds : dataSnapshot.getChildren()) {
if (ds.getValue(String.class).equals("active")) {
DatabaseReference getRequests = FirebaseDatabase.getInstance().getReference("Services").child(ds.getKey()).child(uid).child("Gigs").child("pending");
getRequests.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
serviceNames.clear(); userNames.clear(); userUids.clear();
for (DataSnapshot data : dataSnapshot.getChildren()) {
String userName = data.child("names").getValue(String.class);
String serviceName = ds.getKey();
String userUid = data.getKey();
userNames.add(userName);
serviceNames.add(serviceName);
userUids.add(userUid);
adapterPendingRequests = new AdapterPendingRequests(getActivity(), userUids, userNames, serviceNames, mAuth.getCurrentUser().getUid());
adapterPendingRequests.notifyDataSetChanged();
pendingRequestsRecyclerView.setAdapter(adapterPendingRequests);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
DatabaseReference getActive = FirebaseDatabase.getInstance().getReference("Services").child(ds.getKey()).child(uid).child("Gigs").child("active");
getActive.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
userUids.clear(); namesToDo.clear(); servicesNames.clear();
for(DataSnapshot datas : dataSnapshot.getChildren()){
String userUid = datas.getKey();
String userName = datas.child("names").getValue(String.class);
String serviceName = ds.getKey();
userUids.add(userUid);
namesToDo.add(userName);
servicesNames.add(serviceName);
Log.d("TAG", userUids.toString());
adapterToDo = new AdapterToDo(getActivity(), namesToDo, userUids, servicesNames);
adapterToDo.notifyDataSetChanged();
toDoRecyclerView.setAdapter(adapterToDo);
if(!userUids.isEmpty()){
LinearLayout toDoLayout = view.findViewById(R.id.toDoLayout);
toDoLayout.setVisibility(View.VISIBLE);
}
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
return view;
}
}
public class AdapterToDo extends RecyclerView.Adapter<AdapterToDo.MyHolder> {
Context context;
List<String> namesToDo;
List<String> uids;
List<String> servicesNames;
public AdapterToDo(Context context, List<String> namesToDo, List<String> uids, List<String> servicesNames) {
this.context = context;
this.namesToDo = namesToDo;
this.uids = uids;
this.servicesNames = servicesNames;
}
@NonNull
@Override
public AdapterToDo.MyHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.to_do_item, parent, false);
return new AdapterToDo.MyHolder(view);
}
@Override
public void onBindViewHolder(@NonNull final AdapterToDo.MyHolder holder, final int position) {
holder.userNames.setText(namesToDo.get(position));
String currentUid = uids.get(position);
String currentOppositeName = namesToDo.get(position);
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent to_chat_activity = new Intent(context, ChatActivity.class);
to_chat_activity.putExtra("oppositeUid", currentUid);
to_chat_activity.putExtra("oppositeNames", currentOppositeName);
to_chat_activity.putExtra("class", getClass().getName());
context.startActivity(to_chat_activity);
}
});
}
@Override
public int getItemCount() {
return uids.size();
}
class MyHolder extends RecyclerView.ViewHolder {
private TextView userNames;
private MyHolder(@NonNull View itemView) {
super(itemView);
userNames = itemView.findViewById(R.id.userNames);
}
}
}
公共类适配器Todo扩展了RecyclerView.Adapter{
语境；
列出待办事项；
列出UID；
列出服务名称；
公共适配器TODO（上下文上下文、列表名称TODO、列表UID、列表服务名称）{
this.context=上下文；
this.namesToDo=namesToDo；
this.uids=uids；
this.servicesNames=servicesNames；
}
@非空
@凌驾
public AdapterToDo.MyHolder onCreateViewHolder（@NonNull ViewGroup父级，int viewType）{
视图=布局更平坦。从（上下文）。充气（R.layout.to_do_项目，父项，false）；
返回新适配器Todo.MyHolder（视图）；
}
@凌驾
BindViewHolder上的公共无效（@NonNull final AdapterToDo.MyHolder，final int位置）{
holder.userNames.setText（namesToDo.get（position））；
字符串currentUid=uids.get（位置）；
字符串currentObjectItemName=namesToDo.get（位置）；
holder.itemView.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
意图聊天活动=新意图（上下文，ChatActivity.class）；
to_chat_activity.putExtra（“对立uid”，currentUid）；
to_chat_activity.putExtra（“对立名称”，current对立名称）；
to_chat_activity.putExtra（“class”，getClass（）.getName（））；
上下文。开始活动（聊天活动）；
}
});
}
@凌驾
public int getItemCount（）{
返回uids.size（）；
}
类MyHolder扩展了RecyclerView.ViewHolder{
私有文本视图用户名；
私有MyHolder（@NonNull View itemView）{
超级（项目视图）；
userNames=itemView.findviewbyd（R.id.userNames）；
}
}
}
private String oppositeUid, oppositeNames, className;
private TextView oppositeNamesTextView;
private Button sendBtn;
private EditText message;
private FirebaseAuth mAuth;
private RecyclerView recyclerView;
private List<ModelChat> modelChatList;
private AdapterChat chatAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
mAuth = FirebaseAuth.getInstance();
Intent intent = getIntent();
oppositeUid = intent.getStringExtra("oppositeUid");
oppositeNames = intent.getStringExtra("oppositeNames");
className = intent.getStringExtra("class");
Log.d("CLASSNAME", className);
modelChatList = new ArrayList<>();
oppositeNamesTextView = findViewById(R.id.oppositeNames);
sendBtn = findViewById(R.id.sendBtn);
message = findViewById(R.id.message);
recyclerView = findViewById(R.id.chatRecyclerView);
LinearLayoutManager linearLayout = new LinearLayoutManager(this);
linearLayout.setStackFromEnd(true);
recyclerView.setLayoutManager(linearLayout);
oppositeNamesTextView.setText(oppositeNames);
sendBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String mMessage = message.getText().toString().trim();
if(!TextUtils.isEmpty(mMessage)){
HashMap<Object, String> hashMap = new HashMap<>();
hashMap.put("sender", mAuth.getCurrentUser().getUid());
hashMap.put("receiver", oppositeUid);
hashMap.put("message", mMessage);
hashMap.put("timestamp", String.valueOf(System.currentTimeMillis()));
if(className.equals("com.example.uploy.AdapterToDo$1")){
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Providers").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
DatabaseReference databaseReference1 = FirebaseDatabase.getInstance().getReference("Users").child(oppositeUid).child("Chats").child(mAuth.getCurrentUser().getUid());
databaseReference1.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
}else{
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Providers").child(oppositeUid).child("Chats").child(mAuth.getCurrentUser().getUid());
databaseReference.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
DatabaseReference databaseReference1 = FirebaseDatabase.getInstance().getReference("Users").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference1.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
}
}
}
});
if(className.equals("com.example.uploy.AdapterToDo$1")){
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Providers").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
modelChatList.clear();
for(DataSnapshot snapshot : dataSnapshot.getChildren()){
if(snapshot.getKey().equals("details")){
continue;
}
ModelChat modelChat = snapshot.getValue(ModelChat.class);
modelChatList.add(modelChat);
chatAdapter = new AdapterChat(ChatActivity.this, modelChatList);
chatAdapter.notifyDataSetChanged();
recyclerView.setAdapter(chatAdapter);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}else{
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Users").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
modelChatList.clear();
for(DataSnapshot snapshot : dataSnapshot.getChildren()){
if(snapshot.getKey().equals("details")){
continue;
}
ModelChat modelChat = snapshot.getValue(ModelChat.class);
modelChatList.add(modelChat);
chatAdapter = new AdapterChat(ChatActivity.this, modelChatList);
chatAdapter.notifyDataSetChanged();
recyclerView.setAdapter(chatAdapter);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
@Override
public void onBackPressed() {
super.onBackPressed();
Log.d("TAG", "PRESSED");
}
私有字符串oppositeUid、oppositeNames、className；
私有TextView反对名称TextView；
私人按钮发送；
私人短信；
私人消防队；
私人回收站；
私有列表；
专用适配器chat-adapter；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u chat）；
mAuth=FirebaseAuth.getInstance（）；
Intent=getIntent（）；
oppositieUID=intent.getStringExtra（“oppositieUID”）；
oppositeNames=intent.getStringExtra（“oppositeNames”）；
className=intent.getStringExtra（“类”）；
Log.d（“CLASSNAME”，CLASSNAME）；
modelChatList=newarraylist（）；
oppositeNamesTextView=findViewById（R.id.oppositeNames）；
sendBtn=findviewbyd（R.id.sendBtn）；
message=findviewbyd（R.id.message）；
recyclerView=findViewById（R.id.chatRecyclerView）；
LinearLayoutManager linearLayout=新的LinearLayoutManager（此）；
线性布局。setStackFromEnd（真）；
recyclerView.setLayoutManager（线性布局）；
反对派名称TextView.setText（反对派名称）；
sendBtn.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
最后一个字符串mMessage=message.getText（）.toString（）.trim（）；
如果（！TextUtils.isEmpty（mMessage））{
HashMap HashMap=新的HashMap（）；
put（“发件人”，mAuth.getCurrentUser（）.getUid（））；
hashMap.put（“接收者”，对立uid）；
hashMap.put（“消息”，mMessage）；
put（“timestamp”，String.valueOf（System.currentTimeMillis（））；
if（className.equals（“com.example.uploy.AdapterToDo$1”））{
DatabaseReference DatabaseReference=FirebaseDatabase.getInstance（）.getReference（“提供者”）.child（mAuth.getCurrentUser（）.getUid（））.child（“聊天室”）.child（对立UID）；
databaseReference.push（）.setValue（hashMap）.addOnSuccessListener（新的OnSuccessListener（））{
@凌驾
成功时公开作废（作废避免）{
message.setText（“”）；
}
}).addOnFailureListener（新的OnFailureListener（）{
@凌驾
public void onFailure（@NonNull异常e）{
Toast.makeText（ChatActivity.this，“发生错误！”，Toast.LENGTH_SHORT.show（）；
}
});
DatabaseReference databaseReference1=FirebaseDatabase.getInstance（）.getReference（“用户”）.child（对立UID）.child（“聊天”）.child（mAuth.getCurrentUser（）.getUid（））；
databaseReference1.push（）.setValue（hashMap）.addOnSuccessListener（新的OnSuccessListener（））{
@凌驾
成功时公开作废（作废避免）{
message.setText（“”）；
}
}).addOnFailureListener（新的OnFailureListener（）{
@凌驾
public void onFailure（@NonNull异常e）{
Toast.makeText（ChatActivity.this，“发生错误！”，Toast.LENGTH_SHORT.show（）；
}
});
}否则{
DatabaseReference DatabaseReference=FirebaseDatabase.getInstance（）.getReference（“提供者”）.child（对立uid.child（“聊天”）.child（mAuth.getCurrentUser（）.getUid（））；
databaseReference.push（）.setValue（hashMap）.addOnSuccessListener（新的OnSuccessListener（））{
@凌驾
成功时公开作废（作废避免）{
message.setText（“”）；
}
}).addOnFailureListener（新的OnFailureListener（）{
@凌驾
public void onFailure（@NonNull异常e）{
Toast.makeText（ChatActivity.this）是一个
private String oppositeUid, oppositeNames, className;
private TextView oppositeNamesTextView;
private Button sendBtn;
private EditText message;
private FirebaseAuth mAuth;
private RecyclerView recyclerView;
private List<ModelChat> modelChatList;
private AdapterChat chatAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
mAuth = FirebaseAuth.getInstance();
Intent intent = getIntent();
oppositeUid = intent.getStringExtra("oppositeUid");
oppositeNames = intent.getStringExtra("oppositeNames");
className = intent.getStringExtra("class");
Log.d("CLASSNAME", className);
modelChatList = new ArrayList<>();
oppositeNamesTextView = findViewById(R.id.oppositeNames);
sendBtn = findViewById(R.id.sendBtn);
message = findViewById(R.id.message);
recyclerView = findViewById(R.id.chatRecyclerView);
LinearLayoutManager linearLayout = new LinearLayoutManager(this);
linearLayout.setStackFromEnd(true);
recyclerView.setLayoutManager(linearLayout);
oppositeNamesTextView.setText(oppositeNames);
sendBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String mMessage = message.getText().toString().trim();
if(!TextUtils.isEmpty(mMessage)){
HashMap<Object, String> hashMap = new HashMap<>();
hashMap.put("sender", mAuth.getCurrentUser().getUid());
hashMap.put("receiver", oppositeUid);
hashMap.put("message", mMessage);
hashMap.put("timestamp", String.valueOf(System.currentTimeMillis()));
if(className.equals("com.example.uploy.AdapterToDo$1")){
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Providers").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
DatabaseReference databaseReference1 = FirebaseDatabase.getInstance().getReference("Users").child(oppositeUid).child("Chats").child(mAuth.getCurrentUser().getUid());
databaseReference1.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
}else{
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Providers").child(oppositeUid).child("Chats").child(mAuth.getCurrentUser().getUid());
databaseReference.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
DatabaseReference databaseReference1 = FirebaseDatabase.getInstance().getReference("Users").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference1.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
}
}
}
});
if(className.equals("com.example.uploy.AdapterToDo$1")){
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Providers").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
modelChatList.clear();
for(DataSnapshot snapshot : dataSnapshot.getChildren()){
if(snapshot.getKey().equals("details")){
continue;
}
ModelChat modelChat = snapshot.getValue(ModelChat.class);
modelChatList.add(modelChat);
chatAdapter = new AdapterChat(ChatActivity.this, modelChatList);
chatAdapter.notifyDataSetChanged();
recyclerView.setAdapter(chatAdapter);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}else{
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Users").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
modelChatList.clear();
for(DataSnapshot snapshot : dataSnapshot.getChildren()){
if(snapshot.getKey().equals("details")){
continue;
}
ModelChat modelChat = snapshot.getValue(ModelChat.class);
modelChatList.add(modelChat);
chatAdapter = new AdapterChat(ChatActivity.this, modelChatList);
chatAdapter.notifyDataSetChanged();
recyclerView.setAdapter(chatAdapter);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
@Override
public void onBackPressed() {
super.onBackPressed();
Log.d("TAG", "PRESSED");
}