小编Mah*_*her的帖子

我试图连接mysql database但我失败了,显示了这个错误

Communications link failure Last packet sent to the server was 1 ms ago

这是我的代码？任何人都可以帮助我

package android_programmers_guide.testconnection;


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

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.Menu;
import android.widget.EditText;

public class TestConnection extends Activity {

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



           Connection conn = null;
           String url = "jdbc:mysql://127.0.0.1:3306/test";
           String driver = "com.mysql.jdbc.Driver";
           String userName = "root"; 
           String password = "root";


           try {
           Class.forName(driver).newInstance();
           conn = DriverManager.getConnection(url,userName,password);


           EditText editText=(EditText) findViewById(R.id.editText1);


           editText.setBackgroundColor(Color.GREEN);
           editText.setText("Connected to …