java - 使用 onPostExecute 推送 MySQL 数据时出错

Question

我是编程新手。我正在做一个登录系统，但是当我登录时，我收到该错误。我不知道如何解决。我还有一个问题:制作一个带有聊天和好友(添加、删除)系统的登录系统太难了吗？

因为我想这样做，但我一周前才开始编程，我可以这样做吗？

FATAL EXCEPTION: main
Process: complete.lyne.myapplication, PID: 18933
java.lang.ArrayIndexOutOfBoundsException: length=2; index=2
at complete.lyne.myapplication.Login$SolicitaDados.onPostExecute(Login.java:110)
at complete.lyne.myapplication.Login$SolicitaDados.onPostExecute(Login.java:91)
at android.os.AsyncTask.finish(AsyncTask.java:660)
at android.os.AsyncTask.-wrap1(AsyncTask.java)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:677)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

这是我的代码:

package complete.lyne.myapplication;

import android.content.Context;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import java.io.IOException;

// import br.com.simplepass.loading_button_lib.customViews.CircularProgressButton;

public class Login extends AppCompatActivity {

    EditText loginEmail, loginSenha;
    Button btLogar;
    TextView refCadastrar;

    String url = "";
    String parametro = "";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);

        loginEmail = (EditText)findViewById(R.id.loginEmail);
        loginSenha = (EditText)findViewById(R.id.loginSenha);
        btLogar = (Button)findViewById(R.id.btLogar);
        refCadastrar = (TextView)findViewById(R.id.refCadastrar);

        refCadastrar.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent abreCadastro = new Intent(Login.this, Cadastro.class);
                startActivity(abreCadastro);
            }
        });

        btLogar.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                ConnectivityManager connectivityManager = (ConnectivityManager)
                        getSystemService(Context.CONNECTIVITY_SERVICE);
                NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();

                if (networkInfo != null && networkInfo.isConnected()) {

                    String email = loginEmail.getText().toString();
                    String senha = loginSenha.getText().toString();

                    if(email.isEmpty() && senha.matches(".*[a-z].*")) {
                        loginEmail.setError("Insira seu endereço de Email.");
                    } else if (email.matches(".*[a-z].*") && senha.isEmpty()) {
                        loginSenha.setError("Insira sua Senha.");
                    } else if (email.isEmpty() && senha.isEmpty()) {
                            Toast.makeText(getApplicationContext(), "Nenhum campo pode ficar vazio.", Toast.LENGTH_LONG).show();
                    } else {

                        // Casa
                        url = "http://192.168.1.100/lyne/logar.php";

                        // Badran
                        // url = "http://172.16.2.15/lyne/logar.php";

                        parametro = "email=" + email + "&senha=" + senha;

                        new SolicitaDados().execute(url);
                    }
                }
                else {
                    Toast.makeText(getApplicationContext(), "Nenhuma conexão com a Internet foi encontrada.", Toast.LENGTH_LONG).show();
                }
            }
        });
    }

    private class SolicitaDados extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... urls) {

                return Conexao.postDados(urls[0], parametro);
        }

        @Override
        protected void onPostExecute(String resultado) {

           if(resultado != null) {
                if (resultado.contains("login_ok")) {

                    String[] dados = resultado.split(",");

                    Intent abreHome = new Intent(Login.this, Home.class);

                    abreHome.putExtra("idusu", dados[1]);
                    abreHome.putExtra("nomeusu", dados[2]);

                    startActivity(abreHome);
                } else {
                    Toast.makeText(getApplicationContext(), "Usuário ou senha incorretos.", Toast.LENGTH_LONG).show();
                }
            }
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        finish();
    }

}

Answer 1

您要求的索引在数组中不存在。

您似乎在寻找两个对象，而不是三个，但您找错了地方。

您应该将代码编辑为如下所示:

abreHome.putExtra("idusu", dados[0]);
abreHome.putExtra("nomeusu", dados[1]);