App does not showing the chatting messages in the physical device when i replace if condition in onDataChanged() method when ever i remove the if condtion in onDataChanged messages are showing but the message is sent to all user not a perticular user
Please do somthing bro i need your help
THIS IS LOGCAT ERROR
2020-07-31 07:58:07.077 26146-26201/com.example.dotchat E/ActivityThread: Failed to find provider info for cn.teddymobile.free.anteater.den.provider
2020-07-31 07:58:07.721 26146-26193/com.example.dotchat E/Parcel: Reading a NULL string not supported here.
2020-07-31 07:58:08.593 26146-26146/com.example.dotchat E/Parcel: Reading a NULL string not supported here.
2020-07-31 07:58:11.863 26146-26146/com.example.dotchat E/RecyclerView: No adapter attached; skipping layout
2020-07-31 07:58:11.864 26146-26146/com.example.dotchat E/RecyclerView: No adapter attached; skipping layout
2020-07-31 07:58:18.571 26146-26146/com.example.dotchat E/RecyclerView: No adapter attached; skipping layout
2020-07-31 07:58:18.571 26146-26146/com.example.dotchat E/RecyclerView: No adapter attached; skipping layout
2020-07-31 07:58:18.787 26146-26146/com.example.dotchat E/Parcel: Reading a NULL string not supported here.
2020-07-31 07:58:19.943 26146-26146/com.example.dotchat E/RecyclerView: No adapter attached; skipping layout
2020-07-31 07:58:19.943 26146-26146/com.example.dotchat E/RecyclerView: No adapter attached; skipping layout
2020-07-31 07:58:24.037 26146-26146/com.example.dotchat E/RecyclerView: No adapter attached; skipping layout
THIS IS MessageActivity.JAVA FILE
package com.example.dotchat;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.example.dotchat.Adapter.MessageAdapter;
import com.example.dotchat.Model.Chat;
import com.example.dotchat.Model.User;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Objects;
import de.hdodenhof.circleimageview.CircleImageView;
public class MessageActivity extends AppCompatActivity {
CircleImageView profile_image;
TextView username;
DatabaseReference reference;
ImageButton btn_send;
EditText text_send;
MessageAdapter messageAdapter;
List<Chat> mchat;
RecyclerView recyclerView;
FirebaseUser fuser;
Intent intent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_message);
Toolbar toolbar=findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Objects.requireNonNull(getSupportActionBar()).setTitle("");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
recyclerView =findViewById(R.id.recycler_view);
recyclerView.setHasFixedSize(true);
LinearLayoutManager linearLayoutManager=new LinearLayoutManager(getApplicationContext());
linearLayoutManager.setStackFromEnd(true);
recyclerView.setLayoutManager(linearLayoutManager);
profile_image=findViewById(R.id.profile_image);
username=findViewById(R.id.username);
btn_send=findViewById(R.id.btn_send);
text_send=findViewById(R.id.text_send);
intent=getIntent();
final String userid=intent.getStringExtra("userid");
fuser= FirebaseAuth.getInstance().getCurrentUser();
btn_send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String msg=text_send.getText().toString();
if(!msg.equals("")){
sendMessage(fuser.getUid(),userid,msg);
} else {
Toast.makeText(MessageActivity.this,"You can't send Empty message",Toast.LENGTH_SHORT).show();
}
text_send.setText("");
}
});
assert userid != null;
reference = FirebaseDatabase.getInstance().getReference("Users").child(userid);
reference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
User user=dataSnapshot.getValue(User.class);
assert user != null;
username.setText(user.getUsername());
profile_image.setImageResource(R.mipmap.ic_launcher);
readMesagges(fuser.getUid(),userid,user.getImageURl());
}
@Override
public void onCancelled(@NonNull DatabaseError error) {
}
});
}
private void sendMessage(String sender,String receiver,String message){
DatabaseReference reference=FirebaseDatabase.getInstance().getReference();
HashMap<String, Object> hashMap =new HashMap<>();
hashMap.put("sender",sender);
hashMap.put("recever",receiver);
hashMap.put("message",message);
reference.child("Chats").push().setValue(hashMap);
}
private void readMesagges(final String myid, final String userid, final String imageurl){
mchat=new ArrayList<>();
reference=FirebaseDatabase.getInstance().getReference("Chats");
reference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
mchat.clear();
for (DataSnapshot snapshot:dataSnapshot.getChildren()){
Chat chat=snapshot.getValue(Chat.class);
assert chat != null;
if(myid.equals(chat.getReceiver()) && userid.equals(chat.getSender()) ||
userid.equals(chat.getReceiver()) && myid.equals(chat.getSender())){
mchat.add(chat);
}
messageAdapter =new MessageAdapter(MessageActivity.this,mchat,imageurl);
recyclerView.setAdapter(messageAdapter);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
IN THIS METHOD IF CONDITION IS NOT WORKING(messages are not Showing in the physical device) WHEN EVER I REMOVE THE IF CONDITON NO ERROR SHOWING BUT MESSAGE WILL GOING TO ALL USERS NOT SELCTED RECEIVER
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
mchat.clear();
for (DataSnapshot snapshot:dataSnapshot.getChildren()){
Chat chat=snapshot.getValue(Chat.class);
assert chat != null;
if(myid.equals(chat.getReceiver()) && userid.equals(chat.getSender()) ||
userid.equals(chat.getReceiver()) && myid.equals(chat.getSender())){
mchat.add(chat);
}
messageAdapter =new MessageAdapter(MessageActivity.this,mchat,imageurl);
recyclerView.setAdapter(messageAdapter);
}
}
THIS IS Chat.java file
package com.example.dotchat.Model;
public class Chat {
private String sender;
private String receiver;
private String message;
public Chat(String sender, String receiver, String message) {
this.sender = sender;
this.receiver = receiver;
this.message = message;
}
public Chat() {
}
public String getSender() {
return sender;
}
public void setSender(String sender) {
this.sender = sender;
}
public String getReceiver() {
return receiver;
}
public void setReceiver(String receiver) {
this.receiver = receiver;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
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