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I’m having this mistake opening ChatActivity.class. Does anyone have a solution to this error? Thanks in advance.
Mistakes
EDIT: --LINE WRONG LINE LINE 89->> Conversation Taught = listConversionsAtualized.get( position ); After standardizing adpter
java.lang.Indexoutofboundsexception: Index: 0, Size: 0 at java.util.Arraylist.get(Arraylist.java:437) at xxx.xxx.Fragment.Searchfragment$1.onItemClick(Searchfragment.java:89)
at xxx.xxx.helper.RecyclerItemClickListener.onInterceptTouchEvent(Recycleritemclicklistener.java:21)
java.lang.Nullpointerexception: Attempt to invoke virtual method 'java.util.List .adapter.Conversasadapter.getConversas()' on a null Object Reference
at xxx.xxx.Fragment.Searchfragment$1.onItemClick(Searchfragment.java:86) at
xxx.xxx.helper.RecyclerItemClickListener.onInterceptTouchEvent(Recycleritemclicklistener.java:21)
Pesquisafragment.class
public class PesquisaFragment extends Fragment {
//Widget
private SearchView searchViewPesquisa;
private RecyclerView recyclerPesquisa;
private ConversasAdapter adapter;
private List<Usuario> listaUsuarios;
private DatabaseReference usuariosRef;
private AdapterPesquisa adapterPesquisa;
private String idUsuarioLogado;
public PesquisaFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_pesquisa, container, false);
searchViewPesquisa = view.findViewById(R.id.searchViewPesquisa);
recyclerPesquisa = view.findViewById(R.id.recyclerPesquisa);
//Configurações iniciais
listaUsuarios = new ArrayList<>();
usuariosRef = ConfiguracaoFirebase.getFirebaseDatabase()
.child("grupos");
idUsuarioLogado = UsuarioFirebase.getIdentificadorUsuario();
//Configura RecyclerView
recyclerPesquisa.setHasFixedSize(true);
recyclerPesquisa.setLayoutManager(new LinearLayoutManager(getActivity()));
adapterPesquisa = new AdapterPesquisa(listaUsuarios, getActivity());
recyclerPesquisa.setAdapter( adapterPesquisa );
//Configurar evento de clique
recyclerPesquisa.addOnItemTouchListener(new RecyclerItemClickListener(
getActivity(),
recyclerPesquisa,
new RecyclerItemClickListener.OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
List<Conversa> listaConversasAtualizada = adapter.getConversas();
Conversa conversaSelecionada = listaConversasAtualizada.get( position );
if( conversaSelecionada.getIsGroup().equals("true") ){
Intent i = new Intent(getActivity(), ChatActivity.class);
i.putExtra("chatGrupo", conversaSelecionada.getGrupo() );
startActivity( i );
}else {
Intent i = new Intent(getActivity(), ChatActivity.class);
i.putExtra("chatContato", conversaSelecionada.getUsuarioExibicao() );
startActivity( i );
}
}
@Override
public void onLongItemClick(View view, int position) {
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
}
));
//Configura searchview
searchViewPesquisa.setQueryHint("Buscar usuários");
searchViewPesquisa.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
String textoDigitado = newText.toUpperCase();
pesquisarUsuarios( textoDigitado );
return true;
}
});
return view;
}
private void pesquisarUsuarios(String texto){
//limpar lista
listaUsuarios.clear();
//Pesquisa usuários caso tenha texto na pesquisa
if( texto.length() >= 2 ){
Query query = usuariosRef.orderByChild("nome")
.startAt(texto)
.endAt(texto + "\uf8ff" );
query.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
//limpar lista
listaUsuarios.clear();
for( DataSnapshot ds : dataSnapshot.getChildren() ){
//verifica se é usuário logado e remove da lista
Usuario usuario = ds.getValue(Usuario.class);
if ( idUsuarioLogado.equals( usuario.getId() ) )
continue;
//adiciona usuário na lista
listaUsuarios.add( usuario );
}
adapterPesquisa.notifyDataSetChanged();
/*
int total = listaUsuarios.size();
Log.i("totalUsuarios", "total: " + total );
*/
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}
}
Conversasadapter.class
import android.content.Context;
import android.net.Uri;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import igab.chat.R;
import igab.chat.model.Conversa;
import igab.chat.model.Grupo;
import igab.chat.model.Usuario;
import java.util.List;
import de.hdodenhof.circleimageview.CircleImageView;
public class ConversasAdapter extends RecyclerView.Adapter<ConversasAdapter.MyViewHolder> {
private List<Conversa> conversas;
private Context context;
public ConversasAdapter(List<Conversa> lista, Context c) {
this.conversas = lista;
this.context = c;
}
public List<Conversa> getConversas(){
return this.conversas;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemLista = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_contatos, parent, false );
return new MyViewHolder(itemLista);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Conversa conversa = conversas.get( position );
holder.ultimaMensagem.setText( conversa.getUltimaMensagem() );
if ( conversa.getIsGroup().equals("true") ){
Grupo grupo = conversa.getGrupo();
holder.nome.setText( grupo.getNome() );
if ( grupo.getFoto() != null ){
Uri uri = Uri.parse( grupo.getFoto() );
Glide.with( context ).load( uri ).into( holder.foto );
}else {
holder.foto.setImageResource(R.drawable.padrao);
}
}else {
Usuario usuario = conversa.getUsuarioExibicao();
if ( usuario != null ){
holder.nome.setText( usuario.getNome() );
if ( usuario.getFoto() != null ){
Uri uri = Uri.parse( usuario.getFoto() );
Glide.with( context ).load( uri ).into( holder.foto );
}else {
holder.foto.setImageResource(R.drawable.padrao);
}
}
}
}
@Override
public int getItemCount() {
return conversas.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
CircleImageView foto;
TextView nome, ultimaMensagem;
public MyViewHolder(View itemView) {
super(itemView);
foto = itemView.findViewById(R.id.imageViewFotoContato);
nome = itemView.findViewById(R.id.textNomeContato);
ultimaMensagem = itemView.findViewById(R.id.textEmailContato);
}
}
}
Recycleritemclicklistener.class
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;
GestureDetector mGestureDetector;
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View childView = rv.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, rv.getChildAdapterPosition(childView));
return true;
}
return false;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
public interface OnItemClickListener extends AdapterView.OnItemClickListener {
public void onItemClick(View view, int position);
public void onLongItemClick(View view, int position);
}
public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
@Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && mListener != null) {
mListener.onLongItemClick(child, recyclerView.getChildAdapterPosition(child));
}
}
});
}
}
estanciei mas agora recebo esse erro, .fragment.PesquisaFragment$1.onItemClick(PesquisaFragment.java:89) .helper.RecyclerItemClickListener.onInterceptTouchEvent(RecyclerItemClickListener.java:21)
– Marc