I Create Recyclerview on android studio use Kotlin programing language, when I run my code I Get Error. This is the Error I'm getting
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.its*******.*******, PID: 18742
java.lang.RuntimeException: Unable to start activity ComponentInfo{******************************}: android.view.InflateException: Binary XML file line #26: RecyclerView has no LayoutManager androidx.recyclerview.widget.RecyclerView{a9ab2d5 VFED..... ......I. 0,0-0,0 #7f080187 app:id/reyclerview_message_list}, adapter:null, layout:null, context:com.its*******.*******.******@36b9430
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3191)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3328)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:113)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:71)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2054)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:233)
at android.app.ActivityThread.main(ActivityThread.java:7225)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:499)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:962)
Caused by: android.view.InflateException: Binary XML file line #26: RecyclerView has no LayoutManager androidx.recyclerview.widget.RecyclerView{a9ab2d5 VFED..... ......I. 0,0-0,0 #7f080187 app:id/reyclerview_message_list}, adapter:null, layout:null, context:com.itsshyam640.cooltalks.userChat@36b9430
Caused by: java.lang.IllegalStateException: RecyclerView has no LayoutManager androidx.recyclerview.widget.RecyclerView{a9ab2d5 VFED..... ......I. 0,0-0,0 #7f080187 app:id/reyclerview_message_list}, adapter:null, layout:null, context:com.its*******.*******.*****@36b9430
at androidx.recyclerview.widget.RecyclerView.generateLayoutParams(RecyclerView.java:4514)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:902)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:861)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:903)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:861)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:699)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:195)
at com.its*******.*******.*****.onCreate(userChat.java:35)
at android.app.Activity.performCreate(Activity.java:7378)
at android.app.Activity.performCreate(Activity.java:7369)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3171)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3328)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:113)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:71)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2054)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:233)
at android.app.ActivityThread.main(ActivityThread.java:7225)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:499)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:962)
This is my mainfile code I had sent the required code only as per the requirements
public class userChat extends AppCompatActivity {
private RecyclerView recyclerView_message_list;
private ArrayList<userChatModel> userChatModels = new ArrayList<>();
FirebaseDatabase database;
FirebaseAuth auth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_chat);
getSupportActionBar().hide();
database = FirebaseDatabase.getInstance();
auth = FirebaseAuth.getInstance();
String senderId = auth.getUid();
String recievedId = getIntent().getStringExtra("userId");
String userName = getIntent().getStringExtra("userName");
String userProfileImage = getIntent().getStringExtra("userProfileImage");
TextView username = findViewById(R.id.top_username);
username.setText(userName);
Picasso.get().load(userProfileImage).placeholder(R.drawable.user).into((ImageView) findViewById(R.id.user_profile));
findViewById(R.id.back_button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(userChat.this,MainActivity.class);
startActivity(intent);
}
});
recyclerView_message_list = (RecyclerView) findViewById(R.id.recyclerView_message_list);
final userChatAdapter userChatAdapter = new userChatAdapter(userChatModels,this);
recyclerView_message_list.setAdapter(userChatAdapter);
LinearLayoutManager layoutManager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
recyclerView_message_list.setLayoutManager(layoutManager);
final String senderMessages = senderId + recievedId;
final String recieverMessages = recievedId + senderId;
database.getReference().child("Chats").child(senderMessages).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot snapshot) {
userChatModels.clear();
for(DataSnapshot snapshot1 : snapshot.getChildren()){
userChatModel userChatModel = snapshot1.getValue(userChatModel.class);
userChatModels.add(userChatModel);
}
userChatAdapter.notifyDataSetChanged();
}
@Override
public void onCancelled(@NonNull DatabaseError error) {
}
});
Here is my xml Code
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/backgroundColor"
tools:context=".userChat">
<androidx.appcompat.widget.Toolbar
android:id="@+id/user_chat_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:elevation="30dp"
android:minHeight="?attr/actionBarSize"
android:theme="?attr/actionBarTheme"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="16dp">
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/back_button"
android:layout_width="50dp"
android:layout_height="50dp"
android:background="@drawable/round_gradient"
android:src="@drawable/ic_keyboard_backspace_black_24dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/user_profile"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_margin="5dp"
android:contentDescription="@string/profile_image"
android:src="@drawable/user"
app:layout_constraintBottom_toBottomOf="@id/back_button"
app:layout_constraintStart_toEndOf="@id/back_button"
app:layout_constraintTop_toTopOf="@id/back_button" />
<TextView
android:id="@+id/top_username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:text="@string/username"
android:textColor="@color/textColor"
app:layout_constraintStart_toEndOf="@+id/user_profile"
app:layout_constraintTop_toTopOf="@+id/user_profile" />
<ImageView
android:id="@+id/audioCall"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_margin="5dp"
android:contentDescription="@string/audio_call_image"
app:layout_constraintBottom_toBottomOf="@+id/videoCall"
app:layout_constraintEnd_toStartOf="@+id/videoCall"
app:layout_constraintTop_toTopOf="@+id/videoCall"
app:srcCompat="@android:drawable/stat_sys_phone_call_forward" />
<ImageView
android:id="@+id/videoCall"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_margin="5dp"
android:contentDescription="@string/video_call_image"
android:src="@drawable/camera_pattern"
app:layout_constraintBottom_toBottomOf="@+id/more_actions"
app:layout_constraintEnd_toStartOf="@+id/more_actions"
app:layout_constraintTop_toTopOf="@+id/more_actions" />
<ImageView
android:id="@+id/more_actions"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_margin="5dp"
android:contentDescription="@string/more_action_image"
android:src="@drawable/ic_more_vert_black_24dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.appcompat.widget.Toolbar>
<LinearLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/recyclerView_message_list" />
</LinearLayout>
Here is my userChat Adapter Code
public class userChatAdapter extends RecyclerView.Adapter{
ArrayList<userChatModel> messageModels;
Context context;
int SENDER_VIEW_TYPE = 1;
int RECIEVER_VIEW_TYPE = 2;
public userChatAdapter(ArrayList<userChatModel> messageModels, Context context) {
this.messageModels = messageModels;
this.context = context;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if(viewType == SENDER_VIEW_TYPE){
View view = LayoutInflater.from(context).inflate(R.layout.message_sent_layout,parent,false);
return new senderViewHolder(view);
}else {
View view = LayoutInflater.from(context).inflate(R.layout.message_recieved_layout,parent,false);
return new recieverViewHolder(view);
}
}
@Override
public int getItemViewType(int position) {
if (messageModels.get(position).getUserId().equals(FirebaseAuth.getInstance().getCurrentUser())){
return SENDER_VIEW_TYPE;
}else {
return RECIEVER_VIEW_TYPE;
}
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
userChatModel messageModel = messageModels.get(position);
if(holder.getClass() == senderViewHolder.class){
((senderViewHolder)holder).senderMessage.setText(messageModel.getUserMessage());
}else {
((recieverViewHolder)holder).recieverMessage.setText(messageModel.getUserMessage());
}
}
@Override
public int getItemCount() {
return messageModels.size();
}
public class recieverViewHolder extends RecyclerView.ViewHolder{
TextView recieverMessage, recieverTime;
public recieverViewHolder(@NonNull View itemView) {
super(itemView);
recieverMessage = itemView.findViewById(R.id.user_recieved_message);
recieverTime = itemView.findViewById(R.id.user_recieved_message_time);
}
}
public class senderViewHolder extends RecyclerView.ViewHolder{
TextView senderMessage, senderTime;
public senderViewHolder(@NonNull View itemView) {
super(itemView);
senderMessage = itemView.findViewById(R.id.user_sent_message);
senderTime = itemView.findViewById(R.id.user_sent_message_time);
}
}
}
I tried many ways but could not resolve the error.... I had applied many stackoverflow solutions.
Thanks in Advance!
