Error trying to connect to a local MySQL database

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Error trying to connect to a local MySQL database

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#1 by (1 votes)

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I'm having trouble trying to access a local MySQL database, I'm following this tutorial .

My file MysqlConnect.java :

package br.com.alerts;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;

public class MysqlConnect extends AsyncTask<Void, Void, Boolean> {

    private final static String url = "jdbc:mysql://192.168.0.1:3306/table";
    private final static String user = "root";
    private final static String pass = "159357";
    private Connection con;
    private Context context;
    private ProgressDialog dialog;

    public MysqlConnect(Context context) {
        this.context = context;
    }
    public Boolean isConected() {
        try
        {
            if (con == null)
            {
                return false;
            } else {
                return (!this.con.isClosed());
            } 
        } catch (SQLException e) {
            return false;
        }
    }
    public boolean connect() {
        try
        {
            Class.forName("com.mysql.jdbc.Driver");
            con = DriverManager.getConnection(url, user, pass);
            Log.d("","Conectado com sucesso!");
        } catch(Exception e) {
            e.printStackTrace();
        }
        return isConected();
    }
    public void disconnect() {
        try {
            con.close();
            con.isClosed();
            Log.d("","Desconectado!");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        dialog = new ProgressDialog(this.context);
        dialog.setMessage("Aguarde... conectando ao banco de dados...");
        dialog.show();
    }
    @Override
    protected Boolean doInBackground(Void... params) {
        connect();
        return isConected();
    }
    @Override
    protected void onPostExecute(Boolean result) {
        super.onPostExecute(result);
        dialog.dismiss();
    }
}

Class that is initiating the connection, MysqlConnectActivity :

package br.com.alerts;

import java.util.concurrent.ExecutionException;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MysqlConnectActivity extends ActionBarActivity {
    Button btInputHost, btInputPort, btInputDataBase, btInputUser, btInputPassword, btstartConnect;

    String host, port, database, user, password;

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

        btInputHost = (Button) findViewById(R.id.ButtonInputHostConnect);
        btInputPort = (Button) findViewById(R.id.ButtonInputPortConnect);
        btInputDataBase = (Button) findViewById(R.id.ButtonInputDataBaseConnect);
        btInputUser = (Button) findViewById(R.id.ButtonInputUserConnect);
        btInputPassword = (Button) findViewById(R.id.ButtonInputPasswordConnect);
        btstartConnect = (Button) findViewById(R.id.ButtonStartConnect);

        btInputHost.setOnClickListener(new View.OnClickListener() {         
            @Override
            public void onClick(View v) {
                AlertDialog.Builder inputHost = new AlertDialog.Builder(MysqlConnectActivity.this);
                inputHost.setTitle("Host:");

                final EditText et_inputHost = new EditText(MysqlConnectActivity.this);
                inputHost.setView(et_inputHost);

                inputHost.setNeutralButton("Cancelar", null);

                inputHost.setPositiveButton("OK", new DialogInterface.OnClickListener() {                   
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        host = et_inputHost.getText().toString();
                        Toast.makeText(MysqlConnectActivity.this, "Host Entered", Toast.LENGTH_LONG).show();
                    }
                });
                inputHost.show();
            }
        });
        btInputPort.setOnClickListener(new View.OnClickListener() {         
            @Override
            public void onClick(View v) {
                AlertDialog.Builder inputPort = new AlertDialog.Builder(MysqlConnectActivity.this);
                inputPort.setTitle("Port:");

                final EditText et_inputPort = new EditText(MysqlConnectActivity.this);
                inputPort.setView(et_inputPort);

                inputPort.setNeutralButton("Cancelar", null);

                inputPort.setPositiveButton("OK", new DialogInterface.OnClickListener() {                   
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        port = et_inputPort.getText().toString();
                        Toast.makeText(MysqlConnectActivity.this, "Port Entered", Toast.LENGTH_LONG).show();
                    }
                });
                inputPort.show();
            }
        });
        btInputDataBase.setOnClickListener(new View.OnClickListener() {         
            @Override
            public void onClick(View v) {
                AlertDialog.Builder inputDataBase = new AlertDialog.Builder(MysqlConnectActivity.this);
                inputDataBase.setTitle("DataBase:");

                final EditText et_inputDataBase = new EditText(MysqlConnectActivity.this);
                inputDataBase.setView(et_inputDataBase);

                inputDataBase.setNeutralButton("Cancelar", null);

                inputDataBase.setPositiveButton("OK", new DialogInterface.OnClickListener() {                   
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        database = et_inputDataBase.getText().toString();
                        Toast.makeText(MysqlConnectActivity.this, "DataBase Entered", Toast.LENGTH_LONG).show();
                    }
                });
                inputDataBase.show();
            }
        });
        btInputUser.setOnClickListener(new View.OnClickListener() {         
            @Override
            public void onClick(View v) {
                AlertDialog.Builder inputUser = new AlertDialog.Builder(MysqlConnectActivity.this);
                inputUser.setTitle("DataBase:");

                final EditText et_inputUser = new EditText(MysqlConnectActivity.this);
                inputUser.setView(et_inputUser);

                inputUser.setNeutralButton("Cancelar", null);

                inputUser.setPositiveButton("OK", new DialogInterface.OnClickListener() {                   
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        user = et_inputUser.getText().toString();
                        Toast.makeText(MysqlConnectActivity.this, "User Entered", Toast.LENGTH_LONG).show();
                    }
                });
                inputUser.show();
            }
        });
        btInputPassword.setOnClickListener(new View.OnClickListener() {         
            @Override
            public void onClick(View v) {
                AlertDialog.Builder inputPassword = new AlertDialog.Builder(MysqlConnectActivity.this);
                inputPassword.setTitle("DataBase:");

                final EditText et_inputPassword = new EditText(MysqlConnectActivity.this);
                inputPassword.setView(et_inputPassword);

                inputPassword.setNeutralButton("Cancelar", null);

                inputPassword.setPositiveButton("OK", new DialogInterface.OnClickListener() {                   
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        password = et_inputPassword.getText().toString();
                        Toast.makeText(MysqlConnectActivity.this, "Password Entered", Toast.LENGTH_LONG).show();
                    }
                });
                inputPassword.show();
            }
        });
        btstartConnect.setOnClickListener(new View.OnClickListener() {          
            @Override
            public void onClick(View v) {           
                MysqlConnect con = new MysqlConnect(MysqlConnectActivity.this);

                TextView tvText = (TextView) findViewById(R.id.ButtonTextTest);
                tvText.setText("Aguardando...");

                try {
                    if (con.execute().get()){
                        if (con.isConected())
                        {
                            tvText.setText("Conectado!");
                        } else {
                            tvText.setText("Falha na Conexao!");
                        }               
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (ExecutionException e) {
                    e.printStackTrace();
                }
            }
        });
    }
}

And my LogCat:

02-14 22:18:16.352: W/System.err(3822): java.sql.SQLException: Unable to connect to any hosts due to exception: java.net.SocketException: java.net.ConnectException: failed to connect to /192.168.0.1 (port 3306): connect failed: ETIMEDOUT (Connection timed out)
02-14 22:18:16.353: W/System.err(3822): ** BEGIN NESTED EXCEPTION ** 
02-14 22:18:16.353: W/System.err(3822): java.net.SocketException
02-14 22:18:16.353: W/System.err(3822): MESSAGE: java.net.ConnectException: failed to connect to /192.168.0.1 (port 3306): connect failed: ETIMEDOUT (Connection timed out)
02-14 22:18:16.353: W/System.err(3822): STACKTRACE:
02-14 22:18:16.354: W/System.err(3822): java.net.SocketException: java.net.ConnectException: failed to connect to /192.168.0.1 (port 3306): connect failed: ETIMEDOUT (Connection timed out)
02-14 22:18:16.354: W/System.err(3822):     at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:143)
02-14 22:18:16.354: W/System.err(3822):     at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:225)
02-14 22:18:16.509: W/System.err(3822):     at com.mysql.jdbc.Connection.createNewIO(Connection.java:1805)
02-14 22:18:16.509: W/System.err(3822):     at com.mysql.jdbc.Connection.<init>(Connection.java:452)
02-14 22:18:16.549: W/System.err(3822):     at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:411)
02-14 22:18:16.549: W/System.err(3822):     at java.sql.DriverManager.getConnection(DriverManager.java:179)
02-14 22:18:16.549: W/System.err(3822):     at java.sql.DriverManager.getConnection(DriverManager.java:213)
02-14 22:18:16.551: W/System.err(3822):     at br.com.alerts.MysqlConnect.connect(MysqlConnect.java:41)
02-14 22:18:16.551: W/System.err(3822):     at br.com.alerts.MysqlConnect.doInBackground(MysqlConnect.java:66)
02-14 22:18:16.551: W/System.err(3822):     at br.com.alerts.MysqlConnect.doInBackground(MysqlConnect.java:1)
02-14 22:18:16.552: W/System.err(3822):     at android.os.AsyncTask$2.call(AsyncTask.java:288)
02-14 22:18:16.552: W/System.err(3822):     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
02-14 22:18:16.552: W/System.err(3822):     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
02-14 22:18:16.552: W/System.err(3822):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
02-14 22:18:16.554: W/System.err(3822):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
02-14 22:18:16.554: W/System.err(3822):     at java.lang.Thread.run(Thread.java:818)
02-14 22:18:16.617: W/System.err(3822): ** END NESTED EXCEPTION **
02-14 22:18:16.618: W/System.err(3822):     at com.mysql.jdbc.Connection.createNewIO(Connection.java:1875)
02-14 22:18:16.619: W/System.err(3822):     at com.mysql.jdbc.Connection.<init>(Connection.java:452)
02-14 22:18:16.619: W/System.err(3822):     at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:411)
02-14 22:18:16.619: W/System.err(3822):     at java.sql.DriverManager.getConnection(DriverManager.java:179)
02-14 22:18:16.619: W/System.err(3822):     at java.sql.DriverManager.getConnection(DriverManager.java:213)
02-14 22:18:16.619: W/System.err(3822):     at br.com.alerts.MysqlConnect.connect(MysqlConnect.java:41)
02-14 22:18:16.620: W/System.err(3822):     at br.com.alerts.MysqlConnect.doInBackground(MysqlConnect.java:66)
02-14 22:18:16.620: W/System.err(3822):     at br.com.alerts.MysqlConnect.doInBackground(MysqlConnect.java:1)
02-14 22:18:16.620: W/System.err(3822):     at android.os.AsyncTask$2.call(AsyncTask.java:288)
02-14 22:18:16.620: W/System.err(3822):     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
02-14 22:18:16.620: W/System.err(3822):     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
02-14 22:18:16.621: W/System.err(3822):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
02-14 22:18:16.621: W/System.err(3822):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
02-14 22:18:16.621: W/System.err(3822):     at java.lang.Thread.run(Thread.java:818)
02-14 22:18:16.639: I/Choreographer(3822): Skipped 7071 frames!  The application may be doing too much work on its main thread.
02-14 22:18:17.890: I/Choreographer(3822): Skipped 110 frames!  The application may be doing too much work on its main thread.

MySQL is running on my machine on port 3606, now I do not know if there is a firewall and MySQL is enabled to receive an external connection.

How can I solve this problem?

mysql java android

asked by anonymous 14.02.2015 / 23:42

1 answer

Facade generic is it possible? Converting STRING, WriteProcessMemory ()

score 1 · Answer 1

Set up your Bank according to this tutorial:

#1 – Edite o arquivo: 
sudo nano /etc/mysql/my.cnf
#2 – Altere a seguinte linha:
#bind-address = 127.0.0.1
#Deixando assim:
#bind-address = 0.0.0.0
#3 – Reinicie o Mysql
sudo /etc/init.d/mysql restart
#4 – Vamos agora dar GRANT no usuário root, logue no mysql:
mysql -u root -p
#5 – Após se logar, digite o seguinte comando:
GRANT ALL ON *.* TO root@’%’ IDENTIFIED BY ‘sua_senha’;

If you do not find the configuration file, find it by cmd / terminal

use find -name 'my.cnf' in unix environment

use dir my.cnf /s"

Source: enabling-remote-access

In case it does not work, there is the possibility of your internet provider providing some kind of door lock, in the case of netvirtual for example you can not remove, if you need to test on a different network, use some service such as AWS you can use a set of services for free for one year.

If you want to test your phone on the same network, it is still possible to leave your phone on the wifi and turn off the 3G, if your router is not locked, go to the configuration page of your router using linux find ip using route -n) open port 3606 and try again.

Mysql installation links Windows , Linux