我有以下问题。
我想回到活动2，将数据作为PutExtra发送。但是在活动2中，您已经有一个GetExtra，它期望来自活动1的数据，所以它给出了一个错误。如何将此数据从活动3发送到活动2而不与活动2冲突，因为我已经预期来自活动1的GetExtra数据。
注意：发送的数据始终相同。它总是以PutExtra的形式发送的用户ID，也作为GetExtra收到。
修改
代码发送或从活动2发送到活动3
public class PerfilEmpTab2 extends Fragment {
private RecyclerView mCardServicoList;
private String mId_Empresa = null;
private DatabaseReference mDatabaseServicos;
private boolean mProcessAddServico = false;
public PerfilEmpTab2() {
// 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_perfil_emp_tab2, container, false);
/* Recebe id de outra tela*/
mId_Empresa = getActivity().getIntent().getExtras().getString("id_empresa");
mDatabaseServicos = FirebaseDatabase.getInstance().getReference().child("Produtos_Empresas").child(mId_Empresa);
/*Recuperar REcyclerView*/
mCardServicoList = (RecyclerView) view.findViewById(R.id.cardListaServicos);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
//mCardCategList.setHasFixedSize(true);
mCardServicoList.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false));
/*Fim Recycler View*/
loadServicos();
return view;
}
private void loadServicos() {
FirebaseRecyclerAdapter<CardServico_row, CardServicosViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<CardServico_row, CardServicosViewHolder>(
CardServico_row.class,
R.layout.card_servicos_row,
CardServicosViewHolder.class,
mDatabaseServicos
) {
@Override
protected void populateViewHolder(final CardServicosViewHolder viewHolder, final CardServico_row model, int position) {
final String servico_key = getRef(position).getKey();
final String nome_produto = model.getNome_produto();
final String duracao = model.getDuracao();
final String valor = model.getValor();
final String valorOld = model.getValorOld();
viewHolder.setNome_produto(model.getNome_produto());
viewHolder.setDuracao(model.getDuracao());
viewHolder.setValor(model.getValor());
viewHolder.setValorOld(model.getValorOld());
/*Clique na view*/
viewHolder.mView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intentServicoDetalhes = new Intent(getActivity(), ServicoDetalhes.class);
intentServicoDetalhes.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intentServicoDetalhes.putExtra("id_empresa", mId_Empresa);
startActivity(intentServicoDetalhes);
}
});
viewHolder.mAddBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//Toast.makeText(Categorias.this, nome + post_key, Toast.LENGTH_LONG).show();
CharSequence opcoes[] = new CharSequence[] {"Editar Serviço", "Ver Detalhes"};
final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
//builder.setTitle("Opçoes");
//builder.setCancelable(false);
builder.setItems(opcoes, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// the user clicked on colors[which]
switch (which) {
case 0:
Toast.makeText(getActivity().getApplication(), "Dados" + "-" + servico_key + "-" + nome_produto + "-" + duracao + "-" + valor + "-" + valorOld, Toast.LENGTH_LONG).show();
/*Intent criarSubC = new Intent(Categorias.this, CadastroSubCategorias.class);
criarSubC.putExtra("id_categ", post_key);
startActivity(criarSubC);*/
mProcessAddServico = false;
break;
case 1:
Toast.makeText(getActivity().getApplication(), "Dados" + "-" + servico_key + "-" + nome_produto + "-" + duracao + "-" + valor + "-" + valorOld, Toast.LENGTH_LONG).show();
mProcessAddServico = false;
break;
}
}
});
builder.show();
}
});
}
};
mCardServicoList.setAdapter(firebaseRecyclerAdapter);
}
public static class CardServicosViewHolder extends RecyclerView.ViewHolder{
View mView;
ImageButton mAddBtn;
public CardServicosViewHolder (View itemView){
super(itemView);
mView = itemView;
mAddBtn = (ImageButton) mView.findViewById(R.id.addServico_tab2);
}
public void setNome_produto(String nome_produto){
TextView card_nomeProduto = (TextView) mView.findViewById(R.id.tvNomeProduto);
card_nomeProduto.setText(nome_produto);
}
public void setDuracao(String duracao){
TextView card_duracao = (TextView) mView.findViewById(R.id.tvDuracao);
card_duracao.setText(duracao);
}
public void setValor(String valor){
TextView card_valor = (TextView) mView.findViewById(R.id.tvValor);
card_valor.setText(valor);
}
public void setValorOld(final String valorOld){
if ( valorOld != null ){
TextView card_valorOld = (TextView) mView.findViewById(R.id.tvValorOld);
card_valorOld.setText(valorOld);
card_valorOld.setPaintFlags(card_valorOld.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG); // Risca o texto
//card_valorOld.setPaintFlags(card_valorOld.getPaintFlags() & (~Paint.STRIKE_THRU_TEXT_FLAG)); // Remove o Risca o texto
} else {
TextView card_valorOld = (TextView) mView.findViewById(R.id.tvValorOld);
card_valorOld.setText(valorOld);
card_valorOld.setVisibility(View.GONE);
}
}
}
}
在活动3中，我得到：
mId_Empresa = getIntent().getExtras().getString("id_empresa");
答案 0 :(得分：3)
当您开始活动时，请拨打startActivityForResult(intent, code)而不是startActivity(intint)。然后在活动3中覆盖finish()并调用setResult(Activity.RESULT_OK, data)，其中数据是您创建的对象new Intent()，并根据需要调用putExtra data.putExtra(key, value)。然后在活动2中覆盖onActivityResult(int requestCode, int resultCode, Intent data)来处理它。 requestCode是您启动活动的代码。请注意onActivityResult发生在onResume之前，因此尝试从onActivityResult更新UI可能无法正常工作，例如通知适配器。
有关详细信息，请参阅此文档 https://developer.android.com/training/basics/intents/result.html
编辑：添加了代码示例
从活动2开始活动3：
static final int SERVICO_DETALHES_REQUEST = 1; // The request code
@Override
public void onClick(View view) {
{
Intent intentServicoDetalhes = new Intent(getActivity(), ServicoDetalhes.class);
intentServicoDetalhes.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intentServicoDetalhes.putExtra("id_empresa", mId_Empresa);
startActivityForResult(intentServicoDetalhes, SERVICO_DETALHES_REQUEST );
}
从活动3设置结果：
@Override
public void finish()
{
Intent data = new Intent();
data.putExtra("id_empresa", "new_id");
setResult(Activity.RESULT_OK, data);
super.finish();
}
处理活动2的结果：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == SERVICO_DETALHES_REQUEST && resultCode == RESULT_OK)
String newId = data.getStringExtra("id_empresa");
}