为什么上下文菜单不起作用？

Question

我有一个带有custon适配器的列表视图。我必须为它设置一个上下文菜单，但它不起作用。我把onItemLongClick放在列表中，但它也不起作用。我不知道如何触发contextmenu。如果我必须点击一个项目或长时间点击它。我会注册一个长时间点击来从项目中获取id。

编辑我想我知道问题出在哪里了。我的项目列表视图上有一个按钮。我从布局中删除了这个按钮，上下文菜单工作得很好。但我需要这个按钮。为什么该按钮导致上下文菜单出现问题？

这是类：

public class HistoricoDespesasActivity extends Activity {
Helper h;
AlphaAnimation buttonClick; 
DespesasDAO dDAO;
ListView lv;
DespesaHistoricoAdapter adapter;
int idDespesasSelecionada;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_historico_despesas);
lv = (ListView)findViewById(R.id.lvHistoricoDespesas);  
TextView tvMarcaModelo = (TextView)findViewById(R.id.tvMarcaModeloCabecalho);
TextView tvApelido = (TextView)findViewById(R.id.tvApelidoCabecalho);
tvApelido.setVisibility(View.INVISIBLE);
tvMarcaModelo.setVisibility(View.INVISIBLE);
buttonClick = new AlphaAnimation(1, 0.5f);
h = new Helper(this);
h.mostraVeiculoAtivo();
adapter = new DespesaHistoricoAdapter(this);
dDAO = new DespesasDAO(this);
dDAO.open();
Cursor cursor = dDAO.consultarTodasDespesasByIdVeiculo(h.getId());
int id;
String data;
String tipoDespesa = null;
double valor;
int tipo = 0;
if(cursor != null && cursor.moveToFirst()){
do {
id = cursor.getInt(cursor.getColumnIndex(DespesasDAO.COLUNA_ID));
data = cursor.getString(cursor.getColumnIndex(DespesasDAO.COLUNA_DESPESA_DATA));
tipo = cursor.getInt(cursor.getColumnIndex(DespesasDAO.COLUNA_ITEM_ID));
valor = cursor.getDouble(cursor.getColumnIndex(DespesasDAO.COLUNA_DESPESA_VALOR));
if(tipo == 1){
tipoDespesa = "Pedágio";
} else if(tipo == 2){
tipoDespesa = "Estacionamento";
} else if(tipo == 3){
tipoDespesa = "Lavagem";
} else if(tipo == 4){
tipoDespesa = "Diversos";
}
adapter.addDespesa(id, tipoDespesa, data, valor);
} while (cursor.moveToNext());
cursor.close();
dDAO.close();
lv.setAdapter(adapter);
}
lv.setLongClickable(true);
lv.setOnItemLongClickListener(new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
idDespesasSelecionada = (Integer) parent.getItemAtPosition(position);
return true;
}
});
registerForContextMenu(lv);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {     
super.onCreateContextMenu(menu, v, menuInfo);
menu.setHeaderTitle("Despesas");
menu.add(0, v.getId(), 0, "Deletar");
}
@Override
public boolean onContextItemSelected(MenuItem item) {       
if(item.getTitle().equals("Deletar")){
dDAO.open();
dDAO.removerDespesasById(idDespesasSelecionada);
dDAO.close();
}

onCreate(new Bundle());
return super.onContextItemSelected(item);
}
@Override
protected void onResume() {
onCreate(new Bundle());
super.onResume();
}
}

Answer 1

删除listView的setOnItemLongClickListener并用此替换onContextItemSelected

@Override
public boolean onContextItemSelected(MenuItem item) 
{
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
if(item.getTitle().equals("Deletar"))
{
dDAO.open();
dDAO.removerDespesasById(info.position);
dDAO.close();
}
return true;
}

Answer 2

更改CreateContextMenu如下：

@Override
public void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater =getMenuInflater();
inflater.inflate(R.menu.more_tab_menu, menu);
}

请参阅本主题：

Android，如何创建上下文菜单。。。

编辑：使用按钮。image按钮和列表视图是可点击的。如果使用Button并设置android:focusable="false" android:focusableInTouchMode="false"工作正常。