Eu uso o Firebase para desenvolver um aplicativo Android. e estava fazendo um sistema de postagem. portanto, com esses códigos, desejo clicar em cada item do Firebase RecyclerView.

e mudei meus códigos para criar itens clicáveis.

a mudança está abaixo.

Antes,

@Override
protected void onStart() {
    super.onStart();

final Query DBquery = FirebaseDatabase.getInstance().getReference().child("post").orderByChild("count");
FirebaseRecyclerAdapter<Post, PostViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Post, PostViewHolder>(
        Post.class,
        R.layout.post_row,
        PostViewHolder.class,
        DBquery
        mDatabase
) {
    @Override
    protected void populateViewHolder(PostViewHolder viewHolder, Post model, int position) {

        viewHolder.setTitle(model.getTitle());
        viewHolder.setDesc(model.getDesc());
        viewHolder.setImage(getApplicationContext(), model.getImage());
        viewHolder.setDate(model.getDate());
    }
};
mPostList.setAdapter(firebaseRecyclerAdapter);
}

public static class PostViewHolder extends RecyclerView.ViewHolder {

View mView;

public PostViewHolder(View itemView) {
    super(itemView);

    mView = itemView;
}

public void setTitle(String title){
    TextView post_title = mView.findViewById(R.id.post_title);
    post_title.setText(title);
}

public void setDesc(String desc){

    TextView post_desc = mView.findViewById(R.id.post_desc);
    post_desc.setText(desc);
}

public void setImage(Context ctx, String image){
    ImageView post_image = mView.findViewById(R.id.post_image);
    Picasso.get().load(image).into(post_image);
}

public void setDate(String date){

    TextView post_date = mView.findViewById(R.id.post_date);
    post_date.setText(date);
}
}

Depois de,

@Overried

protected void onStart() {
    super.onStart();

    final Query DBquery = FirebaseDatabase.getInstance().getReference().child("post").orderByChild("count");
    FirebaseRecyclerOptions<Post> options = new FirebaseRecyclerOptions.Builder<Post>()
            .setQuery(DBquery, Post.class)
            .build();

    final FirebaseRecyclerAdapter<Post, PostViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Post, PostViewHolder>(options) {

        @NonNull
        @Override
        public PostViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.post_row, parent, false);
            return new PostViewHolder(view);
        }

        @Override
        public void onBindViewHolder(@NonNull PostViewHolder holder, int position, Post model) {
            super.onBindViewHolder(holder, position);

            holder.setTitle(model.getTitle());
            holder.setDesc(model.getDesc());
            holder.setImage(getApplication(), model.getImage());
            holder.setDate(model.getDate());

        }
    };
    mPostList.setAdapter(firebaseRecyclerAdapter);
}



public static class PostViewHolder extends RecyclerView.ViewHolder {

    View mView;

    public PostViewHolder(View itemView) {
        super(itemView);
        mView = itemView;
    }

    public void setTitle(String title){
        TextView post_title = mView.findViewById(R.id.post_title);
        post_title.setText(title);
    }

    public void setDesc(String desc){

        TextView post_desc = mView.findViewById(R.id.post_desc);
        post_desc.setText(desc);
    }

    public void setImage(Context ctx, String image){
        ImageView post_image = mView.findViewById(R.id.post_image);
        Picasso.get().load(image).into(post_image);
    }

    public void setDate(String date){

        TextView post_date = mView.findViewById(R.id.post_date);
        post_date.setText(date);
    }
}

Mas eu recebi esse erro. e eu não tenho idéia para esses problemas, na verdade.

Erro de compilação abaixo

Program type already present: 
android.arch.lifecycle.LiveData$LifecycleBoundObserver
Message{kind=ERROR, text=Program type already present: 
android.arch.lifecycle.LiveData$LifecycleBoundObserver, sources=[Unknown 
source file], tool name=Optional.of(D8)}

Erro do LogCat abaixo

06-01 23:45:06.261 1959-3666/? E/SeTransactionSyncTask: Error retrieving account
java.lang.IllegalStateException: No current tap-and-pay account
    at alty.b(:com.google.android.gms@[email protected] (040700-197041431):3)
    at alty.a(:com.google.android.gms@[email protected] (040700-197041431):1)
    at amnv.a(:com.google.android.gms@[email protected] (040700-197041431):28)
    at com.google.android.gms.tapandpay.gcmtask.TapAndPayGcmTaskChimeraService.b(:com.google.android.gms@[email protected] (040700-197041431):1)
    at com.google.android.gms.tapandpay.gcmtask.TapAndPayGcmTaskChimeraService.a(:com.google.android.gms@[email protected] (040700-197041431):1)
    at com.google.android.gms.tapandpay.phenotype.PhenotypeCommitIntentOperation.onHandleIntent(:com.google.android.gms@[email protected] (040700-197041431):47)
    at com.google.android.chimera.IntentOperation.onHandleIntent(:com.google.android.gms@[email protected] (040700-197041431):2)
    at dbn.a(:com.google.android.gms@[email protected] (040700-197041431):8)
    at nam.a(:com.google.android.gms@[email protected] (040700-197041431):9)
    at dbs.run(:com.google.android.gms@[email protected] (040700-197041431):10)
    at dbp.run(:com.google.android.gms@[email protected] (040700-197041431):9)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
    at java.lang.Thread.run(Thread.java:761)