Msb Says
Reputation: 11
Remove item from populateViewHolder in firebaseRecyclerAdapter
I am trying to remove item from firebaseRecyelerAdapter in populateViewHolder method. I am using item.setVisibility(view.GONE) but that again shows value when come back in that fragment. here is my code:
public class ChatsFragment extends Fragment {
private RecyclerView mConvList;
private DatabaseReference mConvDatabase;
private DatabaseReference mMessageDatabase;
private DatabaseReference mUsersDatabase;
private FirebaseAuth mAuth;
private String mCurrent_user_id;
private View mMainView;
private ProgressDialog pd;
public ChatsFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mMainView = inflater.inflate(R.layout.fragment_chats, container, false);
mConvList = (RecyclerView) mMainView.findViewById(R.id.conv_list);
mAuth = FirebaseAuth.getInstance();
mCurrent_user_id = mAuth.getCurrentUser().getUid();
mConvDatabase = FirebaseDatabase.getInstance().getReference().child("Chat").child(mCurrent_user_id);
mConvDatabase.keepSynced(true);
mUsersDatabase = FirebaseDatabase.getInstance().getReference().child("Users");
mMessageDatabase = FirebaseDatabase.getInstance().getReference().child("messages").child(mCurrent_user_id);
mUsersDatabase.keepSynced(true);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
mConvList.setHasFixedSize(true);
mConvList.setLayoutManager(linearLayoutManager);
// Inflate the layout for this fragment
return mMainView;
}
@Override
public void onStart() {
super.onStart();
Query conversationQuery = mConvDatabase.orderByChild("timestamp");
final FirebaseRecyclerAdapter<Conv, ConvViewHolder> firebaseConvAdapter = new FirebaseRecyclerAdapter<Conv, ConvViewHolder>(
Conv.class,
R.layout.users_single_layout,
ConvViewHolder.class,
conversationQuery
) {
@Override
protected void populateViewHolder(final ConvViewHolder convViewHolder, final Conv conv, final int i) {
final String list_user_id = getRef(i).getKey();
Query lastMessageQuery = mMessageDatabase.child(list_user_id).limitToLast(1);
lastMessageQuery.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
String data = dataSnapshot.child("message").getValue().toString();
convViewHolder.setMessage(data, conv.isSeen());
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
mUsersDatabase.child(list_user_id).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
final String userName = dataSnapshot.child("name").getValue().toString();
String userThumb = dataSnapshot.child("thumb_image").getValue().toString();
if(dataSnapshot.hasChild("online")) {
String userOnline = dataSnapshot.child("online").getValue().toString();
convViewHolder.setUserOnline(userOnline);
}
convViewHolder.setName(userName);
convViewHolder.setUserImage(userThumb, getContext());
convViewHolder.mView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent chatIntent = new Intent(getContext(), ChatActivity.class);
chatIntent.putExtra("user_id", list_user_id);
chatIntent.putExtra("user_name", userName);
startActivity(chatIntent);
}
});
convViewHolder.mView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
Toast.makeText(getContext(), "long clicked", Toast.LENGTH_SHORT).show();
firebaseConvAdapter.getRef(i).removeValue()
.addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
Toast.makeText(getContext(), "deleted", Toast.LENGTH_SHORT).show();
}
});
return false;
}
});
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
};
mConvList.setAdapter(firebaseConvAdapter);
}
public static class ConvViewHolder extends RecyclerView.ViewHolder {
Context context;
View mView;
public ConvViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setMessage(String message, boolean isSeen){
TextView userStatusView = (TextView) mView.findViewById(R.id.user_single_status);
userStatusView.setText(message);
if(!isSeen){
userStatusView.setTypeface(userStatusView.getTypeface(), Typeface.BOLD);
} else {
userStatusView.setTypeface(userStatusView.getTypeface(), Typeface.NORMAL);
}
}
public void setName(String name){
TextView userNameView = (TextView) mView.findViewById(R.id.user_single_name);
userNameView.setText(name);
}
public void setUserImage(String thumb_image, Context ctx){
CircleImageView userImageView = (CircleImageView) mView.findViewById(R.id.user_single_image);
Picasso.with(ctx).load(thumb_image).placeholder(R.mipmap.default_image).into(userImageView);
}
public void setUserOnline(String online_status) {
ImageView userOnlineView = (ImageView) mView.findViewById(R.id.user_single_online_icon);
if(online_status.equals("true")){
userOnlineView.setVisibility(View.VISIBLE);
} else {
userOnlineView.setVisibility(View.INVISIBLE);
}
} }}
I am trying to remove the value on LongClicked method.thanks. I also tried to used item.remove() method but that is not remove() method is not recogninzing in this method. Please help me
Upvotes: 0
Views: 1314
Answers (2)
Gourango Sutradhar
Reputation: 1619
In your build.gradle
implementation 'com.firebaseui:firebase-ui-database:4.1.0'
In your action class:
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.gstech.merge.disasterapp.R;
import com.gstech.merge.disasterapp.holder.DisasterHolder;
import com.gstech.merge.disasterapp.model.DisasterModel;
import com.squareup.picasso.Picasso;
public class AdminPanel extends AppCompatActivity {
RecyclerView recyclerView;
FirebaseRecyclerAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_admin_panel);
recyclerView = findViewById(R.id.recycler);
Query query = FirebaseDatabase.getInstance().getReference().child("disatsers");
FirebaseRecyclerOptions options = new FirebaseRecyclerOptions.Builder<DisasterModel>()
.setQuery(query, DisasterModel.class)
.build();
adapter = new FirebaseRecyclerAdapter<DisasterModel, DisasterHolder>(options) {
@Override
public DisasterHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycler_disaster_view, parent, false);
return new DisasterHolder(view);
}
@Override
protected void onBindViewHolder(DisasterHolder holder, int position, final DisasterModel model) {
// Bind the Chat object to the ChatHolder
// ...
holder.type.setText("দুর্যোগের ধরণঃ " + model.getDisaster_type());
holder.address.setText("Division: " + model.getDivision()
+ ", District: " + model.getDistrtct()
+ ", Upazilla: " + model.getUpazilla()
+ ", Union: " + model.getUnion()
+ ", Ward: " + model.getWard()
);
holder.datetime.setText("Date: " + model.getDate() + ", Time: " + model.getTime());
holder.details.setText("আহতের সংখ্যাঃ " + model.getInjured() + ", মৃতের সংখ্যাঃ " + model.getDeath()
+ ", পরিবারের সংখ্যাঃ " + model.getTotalfamily() + ", পাকা বাড়ির সংখ্যাঃ " + model.getPakabar()
+ ", কাঁচা বাড়ির সংখ্যাঃ " + model.getKachabari() + ", গবাদি পশুর সংখ্যাঃ " + model.getAnimals());
holder.others.setText("অন্যান্যঃ " + model.getOthers());
Picasso.get().load(model.getPhotourl()).placeholder(R.drawable.loading).into(holder.image);
}
};
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
}
@Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
@Override
protected void onStop() {
super.onStop();
adapter.stopListening();
}
}
And create another class for view holder:
public class NewsHolder extends RecyclerView.ViewHolder {
public ImageView cover;
public TextView title;
public CardView newscard;
public NewsHolder(@NonNull View itemView) {
super(itemView);
cover = itemView.findViewById(R.id.cover);
title = itemView.findViewById(R.id.title);
newscard = itemView.findViewById(R.id.newscard);
}
}
And your xml layout for the recyclerview:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="wrap_content">
<android.support.v7.widget.CardView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/darker_gray">
<TextView
android:id="@+id/datetime"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="TextView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/address" />
<TextView
android:id="@+id/details"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="TextView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/datetime" />
<TextView
android:id="@+id/others"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="TextView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/details" />
<TextView
android:id="@+id/address"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="TextView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/type" />
<ImageView
android:id="@+id/image"
android:layout_width="0dp"
android:layout_height="120dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/others"
app:srcCompat="@drawable/bd_gov_logo" />
<TextView
android:id="@+id/type"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="TextView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
</android.support.v7.widget.CardView>
</android.support.constraint.ConstraintLayout>
Thatz it!!! edit the classes as your need. Thanks brother :)
Upvotes: 0
Gourango Sutradhar
Reputation: 1619
You need the firebaserecycleradapter and then find the position of the data by getting the reference of the data in firebase database. Then just remove it. Just try it. May be it will help you :)
firebaseConvAdapter.getRef(i).removeValue().addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful()){
//Your data is removed successfully!
}
}
});
Upvotes: 1
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