今天我的问题是开发了一个具有登录，维护产品的APP（更多的说法），所有这些都是使用数据库引擎SQL
并创建登录全部确定，程序正常登录用户并通过以前，也认为维护创建产品，我将产品的名称及其各自的描述作为参数，我添加，编辑和删除，只是没有管理搜索数据，并在访问相应的布局时显示我，使用我的MainMenu的onCreate方法，但嘿，情况并非如此，相关的情况是我想通过一个按钮知道如何做到这一点，找到我在EditText上输入的名称或与名称相关的名称，并尝试使用以下代码执行此操作：
package com.sqldata.gst.appsql;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
/**
* Created by Administrador on 05/10/2016.
*/
public class ConClientes extends MainActivity {
Conexion conexionSQL;
EditText txtCdCliente, txtNomCli;
Button btnBuscar, btnRetornar;
ProgressBar pgrCliente;
ListView lstClientes;
String idCliente;
//ResultSet rs;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.con_clientes);
conexionSQL = new Conexion();
txtCdCliente = (EditText) findViewById(R.id.txtCdCliente);
//txtNomCli = (EditText) findViewById(R.id.txtNomCli);
btnBuscar = (Button) findViewById(R.id.btnBuscar);
btnRetornar = (Button) findViewById(R.id.btnRetornar);
pgrCliente = (ProgressBar) findViewById(R.id.pgrCliente);
lstClientes = (ListView) findViewById(R.id.lstClientes);
pgrCliente.setVisibility(View.GONE);
idCliente = "";
// Evento Ejecutar Boton
btnBuscar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SelectClientes selectClientes = new SelectClientes();
selectClientes.execute(""); //Cannot resolve method 'execute(java.lang.String)
}
});
}
public class FillList extends AsyncTask<String, String, String>
{
String result = "";
List<Map<String, String>> CliList = new ArrayList<Map<String, String>>();
@Override
protected void onPreExecute(){
pgrCliente.setVisibility(View.VISIBLE);
}
@Override
protected void onPostExecute(String r){
pgrCliente.setVisibility(View.GONE);
Toast.makeText(ConClientes.this, r, Toast.LENGTH_SHORT).show();
String[] from = {"A", "B", "C"};
int[] views = {R.id.lblClienteId, R.id.lblNomCli, R.id.lblCodCli};
final SimpleAdapter ADA = new SimpleAdapter(ConClientes.this, CliList, R.layout.lst_cliente,
from, views);
lstClientes.setAdapter(ADA);
lstClientes.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
HashMap<String, Object> obj = (HashMap<String, Object>) ADA.getItem(arg2);
idCliente = (String) obj.get("A");
//String ClienName = (String) obj.get("B");
String ClienCod = (String) obj.get("C");
//txtNomCli.setText(ClienName);
txtCdCliente.setText(ClienCod);
}
});
}
@Override
protected String doInBackground (String... params){
try{
Connection cnSQL = conexionSQL.CONN();
if (cnSQL == null){
result = "Error en la Conexión SQL Server";
}
else{
String query = "select * from clientes";
PreparedStatement psSQL = cnSQL.prepareStatement(query);
ResultSet rsSQL = psSQL.executeQuery();
ArrayList data1 = new ArrayList();
while (rsSQL.next()){
Map<String, String> dataRec = new HashMap<String, String>();
dataRec.put("A", rsSQL.getString("idcliente"));
dataRec.put("B", rsSQL.getString("nom_cli"));
dataRec.put("C", rsSQL.getString("cod_cli"));
CliList.add(dataRec);
}
result = "Success";
}
} catch (Exception ex){
result = "Error al Buscar Datos de la Tabla Clientes";
}
return result;
}
}
public class SelectClientes extends ArrayList<String>{
String result = "";
Boolean isSuccess = false;
String ClienCod = txtCdCliente.getText().toString();
String NomCli = txtNomCli.getText().toString();
@Override //Method does not override method from its superclass
protected void onPreExecute(){
pgrCliente.setVisibility(View.VISIBLE);
}
//@Override
protected void onPostExecute(String r){
pgrCliente.setVisibility(View.GONE);
Toast.makeText(ConClientes.this, r, Toast.LENGTH_SHORT).show();
if (isSuccess == true){
FillList fillList = new FillList();
fillList.execute("");
}
}
@Override //Method does not override method from its superclass
protected String doInBackground(String... params){
if (ClienCod.trim().equals(""))
result = "Favor de Introducir el Codigo del Cliente";
else {
try{
Connection con = conexionSQL.CONN();
if (con == null){
result = "No Hay Datos para Mostrar";
} else {
String query = "Select * from clientes where idcliente =" + idCliente;
PreparedStatement preparedStatement = con.prepareStatement(query);
preparedStatement.executeUpdate();
result = "Busqueda de Datos Correcta";
isSuccess = true;
}
} catch (Exception ex){
isSuccess = false;
result = "Verifique los Datos";
}
}
return result;
}
}
}
观察到这是我的代码和尝试，但有两个因素是注释代码，第一个是：
selectClientes.execute(""); // Can not resolve method 'execute (java.lang.String)
和覆盖中的第二个
@Override //Method does not override method from its superclass
这是我的唠叨我不明白我怎么能让我查询包含editext =这将是寻求的名称，以及执行select * from的动作的按钮，你了解我
我想从菜单中输入布局时加载并显示数据，而不按任何内容
比如doInBackground方法，这就是我想要做的但是我想它在onCreate中你会理解我，如果你需要更多的细节，请说，我想要的是解决这个小问题
感谢All !!
答案 0 :(得分：0)
当然app无法解析方法execute，因为ArrayList没有它。
SelectClientes extends ArrayList
SelectClientes应扩展AsyncTask。