Androidstudio连接MySQL5.6数据库

使用环境：Androidstudio4.0 MySQL5.6 mysql-connector-java-5.1.30-bin.jar 补充一下，数据库用户需要赋予权限

GRANT ALL PRIVILEGES ON 数据库名.表名 TO '用户'@'地址' IDENTIFIED BY '连接时验证的密码' WITH GRANT OPTION;

数据库名.表名：是给用户该表的所有权限（*.*表示所有数据库和表） 地址：是允许访问的IP地址，%代表允许所有

mainactivity.java

package com.example.testmysql56; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class MainActivity extends AppCompatActivity { private Button bt_ConMysql; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); bt_ConMysql = findViewById(R.id.bt_ConMysql); bt_ConMysql.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View view) { new Thread(new Runnable() { @Override public void run() { System.out.println(Connection_Init()); } }).start(); } }); } public Connection Connection_Init() { Connection connection = null; try { Class.forName("com.mysql.jdbc.Driver");//加载驱动 long in1 = System.currentTimeMillis(); try { connection = DriverManager.getConnection( "jdbc:mysql://电脑的IPv4地址:3306/数据库名?useUnicode=true&characterEncoding=utf8", "root", "密码");// 输入连接参数 } catch (SQLException e) { e.printStackTrace(); } long end = System.currentTimeMillis(); System.out.println("连接耗时" + (end - in1));//连接耗时 } catch (ClassNotFoundException e) { e.printStackTrace(); } return connection; } }

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:orientation="vertical" tools:context=".MainActivity"> <Button android:id="@+id/bt_ConMysql" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="连接" /> </LinearLayout>

注意清单文件中需要添加权限

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.testmysql56"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> </manifest>

将jar包复制到libs中 按照如下步骤，将jar包导入依赖 虚拟机运行 点击连接 查看日志，连接成功了