Android studio 通过mysql连接数据库完成注册登录，登陆后通过tcp协议与电脑的网络调试助手互发信息-Toy模板网

这篇具有很好参考价值的文章主要介绍了Android studio 通过mysql连接数据库完成注册登录，登陆后通过tcp协议与电脑的网络调试助手互发信息。希望对大家有所帮助。如果存在错误或未考虑完全的地方，请大家不吝赐教，您也可以点击"举报违法"按钮提交疑问。

先不多直接看软件截图

这个是首页等陆界面

android项目mysql登录,android-studio

xml代码如下

<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:background="@drawable/port"
    tools:context=".MainActivity"
    android:orientation="vertical">


    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="60dp"
        android:layout_marginTop="20dp"
        android:gravity="center">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/jxlkjlog" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="@string/welcome"
            android:textColor="#000000"
            android:textSize="20.5sp"
            android:textStyle="bold" />



    </LinearLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_marginTop="200dp"
        android:layout_marginEnd="50dp"
        >

        <TextView
            android:id="@+id/text_username"
            android:layout_width="wrap_content"
            android:layout_height="60dp"
            android:text="@string/username"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold">

        </TextView>

        <EditText
            android:id="@+id/Edit_username"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@id/text_username"
            android:hint="用户名不少于三位"
            android:inputType="text"
            android:autofillHints=""></EditText>
    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"

        android:layout_marginEnd="50dp">

        <TextView
            android:id="@+id/text_passwold"
            android:layout_width="wrap_content"
            android:layout_height="60dp"
            android:text="@string/passwold"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold">

        </TextView>

        <EditText
            android:id="@+id/Edit_passwold"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@id/text_passwold"
            android:inputType="textPassword"
            android:hint="密码不少于四位"

            ></EditText>
    </RelativeLayout>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center">

        <Button
            android:id="@+id/btn_login"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/login"
            tools:ignore="ButtonStyle">



        </Button>

        <Button
            android:id="@+id/btn_enroll"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/enroll"
            tools:ignore="ButtonStyle">

        </Button>
    </LinearLayout>

</LinearLayout>

MainActivity文件

public class MainActivity extends AppCompatActivity {
private Button mButtonLongin;
private Button mButtonEnroll;
private EditText mEditTextUsername;
private EditText mEditTextPassword;
private String username;
private String password;


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

        mButtonLongin=findViewById(R.id.btn_login);
        mButtonEnroll=findViewById(R.id.btn_enroll);
        mEditTextUsername=findViewById(R.id.Edit_username);
        mEditTextPassword=findViewById(R.id.Edit_passwold);
        UserDao userDao=new UserDao();
        mButtonEnroll.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(MainActivity.this,MainActivity3.class);
                startActivity(intent);
            }

        });
        mButtonLongin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
        EditText editTextusername=findViewById(R.id.Edit_username);
        EditText editTextpassword=findViewById(R.id.Edit_passwold);
                if (editTextusername.length() < 3) {
//                    Toast.makeText(MainActivity.this, "用户名不能小于三位", Toast.LENGTH_LONG).show();
                    CommonUtils.showLontMsg(MainActivity.this, "用户名不能小于三位");

                } else if (editTextpassword.length() < 4) {

                    CommonUtils.showLontMsg(MainActivity.this, "密码不能小于四位");

                }else
                {
                    new Thread() {
                        public void run() {
                          boolean aa=  userDao.longin(editTextusername.getText().toString(),editTextpassword.getText().toString());
                          if(aa==true){

                              Intent intent=new Intent(MainActivity.this,MainActivity2.class);
                              startActivity(intent);

                          }else{
                              Looper.prepare();
                             CommonUtils.showDlgMsg(MainActivity.this, "账号密码不正确");
                             Looper.loop();
                          }

                        }
                    }.start();
                }
            }



        });

    }

以下是注册界面

android项目mysql登录,android-studio

注册界面的xlm文件这个界面比较简单就不介绍了

<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:orientation="vertical"
    tools:context=".MainActivity3">
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="60dp"
        android:layout_marginTop="20dp"
        android:layout_gravity="center"
        android:gravity="center"
        >

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/jxlkjlog" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="@string/welcome"
            android:textColor="#000000"
            android:textSize="20.5sp"
            android:textStyle="bold" />



    </LinearLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_marginTop="200dp"
        android:layout_marginEnd="50dp"
        android:layout_margin="5dp"
        >

        <TextView
            android:id="@+id/text_username"
            android:layout_width="wrap_content"
            android:layout_height="50dp"
            android:text="@string/username"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold"
            >

        </TextView>

        <EditText
            android:id="@+id/Edit_username"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@id/text_username"
            android:hint="用户名不少于三位"
            android:inputType="text"

            android:autofillHints=""></EditText>
    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_marginEnd="50dp"
        android:layout_margin="5dp"
        >

        <TextView
            android:id="@+id/text_passwold"
            android:layout_width="wrap_content"
            android:layout_height="50dp"
            android:text="@string/passwold"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold">

        </TextView>

        <EditText
            android:id="@+id/Edit_passwold"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@id/text_passwold"
            android:inputType="textPassword"
            android:hint="密码不少于四位"
            ></EditText>
    </RelativeLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_marginEnd="50dp"
        android:layout_margin="5dp">
        <TextView
            android:id="@+id/text_name"
            android:layout_width="wrap_content"
            android:layout_height="50dp"
            android:text="@string/name"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold"

            >


        </TextView>

        <EditText
            android:id="@+id/Edit_name"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@id/text_name"
            android:inputType="text"
            android:hint="请输入姓名"

            ></EditText>
    </RelativeLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_margin="5dp"
        android:layout_marginEnd="50dp">
        <TextView
            android:id="@+id/text_idcard"
            android:layout_width="wrap_content"
            android:layout_height="50dp"
            android:text="@string/idcard"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold"
            >


        </TextView>

        <EditText
            android:id="@+id/Edit_idcard"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@id/text_idcard"
            android:inputType="text"
            android:hint="输入身份证号码"

            ></EditText>
    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_margin="5dp"
        android:layout_marginEnd="50dp">
        <TextView
            android:id="@+id/text_phonenumber"
            android:layout_width="wrap_content"
            android:layout_height="50dp"
            android:text="@string/phonenumber"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold"

            >


        </TextView>

        <EditText
            android:id="@+id/Edit_phonenumber"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@id/text_phonenumber"
            android:inputType="text"
            android:hint="请输入手机号"

            ></EditText>
    </RelativeLayout>
<LinearLayout
    android:layout_width="280dp"
    android:layout_height="60dp"
    android:layout_gravity="center"
    android:layout_marginLeft="18dp">
    <Button
        android:id="@+id/register"
        android:layout_width="130dp"
        android:layout_height="60dp"
        android:text="注册"
        tools:ignore="ButtonStyle">

    </Button>

    <Button
        android:id="@+id/cancel"
        android:layout_width="130dp"
        android:layout_height="60dp"
        android:text="返回"
        tools:ignore="ButtonStyle">

    </Button>

</LinearLayout>

</LinearLayout>

MainActivity文件

package com.example.longin_demo;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.example.longin_demo.tcp.ConnectThread;
import com.example.longin_demo.tcp.Send;

public class MainActivity2 extends AppCompatActivity {
    private Button mBtn_send;
    private Button mBtn_connect;
    private EditText mEt_send;
    private static TextView mTv_recv;
    private String ip;
    private int port;
    private String msg;
    private ConnectThread ct;
    private Send send;
    private Handler handler;
    static Receive re = new Receive();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        mTv_recv = findViewById(R.id.receive);
        mBtn_connect = findViewById(R.id.connect);
        mBtn_send = findViewById(R.id.btn_1);


        final EditText mEt_ip = this.findViewById(R.id.ip);
        final EditText mEt_port = this.findViewById(R.id.port);
        final EditText mEt_send = this.findViewById(R.id.send);

/*
设置一个点击事件用以连接线程
*/
        mBtn_connect.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ip = mEt_ip.getText().toString();//获取输入的ip
                port = Integer.parseInt(mEt_port.getText().toString());//获取输入的端口号

                ct = new ConnectThread(ip, port,re);//创建一个线程来处理消息的收发
                ct.start();
            }
        });
        /*
设计一个点击事件用以发送消息
*/
        mBtn_send.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                msg = mEt_send.getText().toString();
                send = new Send(msg, port, ip);
                send.start();

            }
        });

    }
    /*
    这里是和连接接收线程中的 re.setString(string) 联动的，自己理解一下怎么走在脑子里面走一次就差不多了。
    */
    public static class Receive{
        private  String string;
        public String getString(){
            return string;
        }
        public void setString(String s){
            this.string = s;
        }
    }
    /*
    下面的callback和连接接收线程中的 MainActivity.callback() 关联，线程运行到那一步后结束回到MainActivity中。
    */
    public static void callback(){
        System.out.println("连接线程执行结束");
        mTv_recv.setText(re.getString());//这里是将接收到的文字显示在接收框内。
    }

    }

这是一个注册失败的界面，如果数据库内有相同的账号密码则显示注册失败

android项目mysql登录,android-studio

话不多说直接上代码

<?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"
    tools:context=".FailRegister"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="@string/no_register"
            android:gravity="center"
            android:textColor="#fff"
            android:background="@color/design_default_color_primary_dark"
            android:textSize="30sp"
            android:textStyle="bold"
            />

    </LinearLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_marginTop="200dp"
        android:layout_marginEnd="50dp"
        >

        <ImageView

            android:layout_width="wrap_content"
            android:layout_height="60dp"
            android:src="@drawable/cw">

        </ImageView>
    </RelativeLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_marginTop="10dp"
        android:layout_marginEnd="50dp"
        android:gravity="center"
        >
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/no_register"
            android:gravity="center"
            android:textSize="30dp"
            android:textStyle="bold"
            />
    </RelativeLayout>
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="50dp"
        android:layout_marginTop="210dp"
        android:layout_marginEnd="10dp"
        android:gravity="center">
        <Button
            android:id="@+id/home_back"
            android:layout_width="150dp"
            android:layout_height="50dp"
            android:text="@string/backtrack"
            tools:ignore="ButtonStyle"
            />
        <Button
            android:id="@+id/go_continue"
            android:layout_width="150dp"
            android:layout_height="50dp"
            android:text="@string/continue_register"
            tools:ignore="ButtonStyle"/>
    </LinearLayout>
</LinearLayout>

MainActivity里面的代码

package com.example.longin_demo;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class FailRegister extends AppCompatActivity {

    private Button home_back;
    private Button go_continue;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fail_register);
        home_back=findViewById(R.id.home_back);
        go_continue=findViewById(R.id.go_continue);
        home_back.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(FailRegister.this, MainActivity.class);
                startActivity(intent);
            }
        });
        go_continue.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(FailRegister.this, MainActivity3.class);
                startActivity(intent);
            }
        });
    }
    }

这里是user类用于定义数据的参数

package com.example.longin_demo.entity;

import java.util.Date;

public class User {
    private int id;
    private String username;
    private String password;
    private String idcard;
    private String name;
    private Date birthdat;
    private String phonenumber;

    public User() {

    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getIdcard() {
        return idcard;
    }

    public void setIdcard(String idcard) {
        this.idcard = idcard;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Date getBirthdat() {
        return birthdat;
    }

    public void setBirthdat(Date birthdat) {
        this.birthdat = birthdat;
    }

    public String getPhonenumber() {
        return phonenumber;
    }

    public void setPhonenumber(String phonenumber) {
        this.phonenumber = phonenumber;
    }

    public User(int id, String username, String password, String idcard, String name, Date birthdat, String phonenumber) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.idcard = idcard;
        this.name = name;
        this.birthdat = birthdat;
        this.phonenumber = phonenumber;
    }
}

dao类用来写SQL语句的

package com.example.longin_demo.dao;

import android.util.Log;

import androidx.annotation.Nullable;

import com.example.longin_demo.entity.User;
import com.example.longin_demo.untils.JDBCUtils;

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

public class UserDao {

public boolean register(String username){
    String sql="select * from user1 where username=?";
    Connection con =JDBCUtils.getConn();
    try{
        PreparedStatement pst =con.prepareStatement(sql);
        pst.setString(1,username);
        if(pst.executeQuery().next()){
            return true;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }finally {
        JDBCUtils.close(con);
    }
    return false;

}
    public boolean longin(String username,String password) {
        String sql = "select * from user1 where username=? and password=?";
        Connection con = JDBCUtils.getConn();
        Log.d("UserDao", "连接数据库成功");
        try {
            PreparedStatement pst=con.prepareStatement(sql);
             pst.setString(1,username);
             pst.setString(2,password);


        if (pst.executeQuery().next()){
        return true;
        }

        } catch (SQLException throwables) {
      throwables.printStackTrace();
            Log.d("UserDao", "连接数据库失败");
        }finally {
        JDBCUtils.close(con);
        }
        return false;
    }


    public boolean register(User user){
        String sql = "insert into user1(username,password,idcard,name,phonenumber) values (?,?,?,?,?)";

        Connection  con = JDBCUtils.getConn();

        try {
            PreparedStatement pst=con.prepareStatement(sql);

            pst.setString(1,user.getUsername());
            pst.setString(2,user.getPassword());
            pst.setString(3,user.getIdcard());
            pst.setString(4,user.getName());
            pst.setString(5, user.getPhonenumber());

            int value = pst.executeUpdate();

            if(value>0){
                return true;
            }

        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }finally {
            JDBCUtils.close(con);
        }
        return false;
    }
}

JDBC连接数据库

package com.example.longin_demo.untils;

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

public class JDBCUtils {
    static {
        try{Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }


    public static Connection getConn(){
        Connection  conn = null;
        try {
                conn= DriverManager.getConnection("jdbc:mysql://192.168.1.158:3306/test","root","root");
        }catch (Exception exception){
            exception.printStackTrace();
        }
        return conn;
    }

    public static void close(Connection conn){
        try {
            conn.close();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
}

我还定义了一个类，用来提示信息直接调用弹出提示框，以及报错，用的定义这个主要是代码复用率

package com.example.longin_demo.untils;

import android.app.AlertDialog;
import android.content.Context;
import android.widget.Toast;

import java.util.Set;

public class CommonUtils {
    public static void showShortMsg(Context context,String msg){
        Toast.makeText(context,msg,Toast.LENGTH_SHORT).show();
    }
    public static void showLontMsg(Context context,String msg){
        Toast.makeText(context,msg,Toast.LENGTH_LONG).show();
    }
    public static void showDlgMsg(Context context,String msg){
        new AlertDialog.Builder(context)
                .setTitle("提示信息")
                .setMessage(msg)
                .setPositiveButton("确定",null)
                .setNegativeButton("取消",null)
                .create().show();
    }
}

在AndroidManifest里面一定要加入这一行代码。

<uses-permission android:name="android.permission.INTERNET" />

下面是通过tcp协议传输的几个类

ConnectThread类

package com.example.longin_demo.tcp;

import android.util.Log;

import com.example.longin_demo.MainActivity2;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class ConnectThread extends Thread{
    //Socket msg = null;//定义socket
    private OutputStream out_ip=null;//定义输出流（ip）
    OutputStream outputStream=null;
    private InputStream inputStream;
    private StringBuffer stringBuffer;
    private String ip;
    private int port;
    private Receive receive;
    private String string;
    private boolean isRun = true;
    private  MainActivity2.Receive re;

    public ConnectThread(String ip, int port, MainActivity2.Receive re) {
        this.ip = ip;
        this.port = port;
        this.re = re;
    }


    @Override
    public void run(){
        Socket so = null;
        try {
            so = new Socket(ip, port);
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println(Thread.currentThread().getName() + ": Hello");
        try {
            inputStream = so.getInputStream();
            out_ip = so.getOutputStream();
            Log.v("AndroidChat","开始连接服务器："+ip+"/"+port);
            sleep(1000);
        }
        catch (IOException | InterruptedException e) {
            Log.v("AndroidChat","连接服务器失败"+e.getMessage());
            e.printStackTrace();
            return;
        }
        Log.v("AndroidChat","成功连接上服务器");
            /*
            下面是接收模块，你可以尝试探究如何将这个模块放在接收线程中。
            */

        try {
            inputStream = so.getInputStream();
            final byte[] buffer = new byte[1024];
            final int len = inputStream.read(buffer);
            System.out.println(new String(buffer,0,len));
            Log.v("AndroidChat","接收成功："+new String(buffer,0,len));
            string = new String(buffer,0,len);
            re.setString(string);
            //上下两行会和MainActivity关联，是回调在显示屏的关键步骤。
            MainActivity2.callback();
            System.out.println(new String(buffer,0,len));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

Receive类

package com.example.longin_demo.tcp;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.example.longin_demo.MainActivity2;
import com.example.longin_demo.R;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.InputStream;
import java.net.Socket;

public class Receive extends Thread {
    private InputStream inputStream;
    private InputStreamReader inputStreamReader;
    private BufferedReader bufferedReader;
    private int port;
    private String ip;
    private String string;
    private MainActivity2 mainActivity;

    public Receive(int port, String ip) {
        this.port = port;
        this.ip = ip;
    }

    @Override
    public void run() {
        try {
            //sleep(1000);
            Socket socket = new Socket(ip,port);
            inputStream = socket.getInputStream();
            final byte[] buffer = new byte[1024];
            final int len = inputStream.read(buffer);
            System.out.println(new String(buffer,0,len));
            Log.v("AndroidChat","接收成功："+new String(buffer,0,len));
            string = new String(buffer,0,len);
        } catch (IOException e) {
            e.printStackTrace();
        }
        //catch (InterruptedException e) {
        //e.printStackTrace();
        //}

        //}
        /*try {
            Socket socket = new Socket(ip,port);
            socket.shutdownOutput();
            inputStream = socket.getInputStream();
            inputStreamReader = new InputStreamReader(inputStream);
            bufferedReader = new BufferedReader(inputStreamReader);
            String msg = null;
            msg = bufferedReader.readLine();
            while((msg=bufferedReader.readLine()) != null) {
                inputStreamReader.close();
                Log.v("AndroidChat","服务器说："+msg);
                System.out.println("服务器说："+msg);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }*/
    /*new Runnable(){
                    @Override
                    public void run() {
                    }
                };*/
    }
    public class MainActivity extends AppCompatActivity{
        private TextView mTv_recive;
        private Button mBtn_recive;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main2);
            mTv_recive = findViewById(R.id.receive);
            mBtn_recive = findViewById(R.id.btn_1);


            mBtn_recive.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    new Thread(new Runnable() {
                        @Override
                        public void run() {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(getApplicationContext(),"123",Toast.LENGTH_SHORT).show();
                                    System.out.println(string);
                                }
                            });
                        }
                    }).start();
                }
            });
        }
    }
}

Send类

package com.example.longin_demo.tcp;

import android.util.Log;

import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class Send extends Thread {
    private String send;
    private OutputStream outputStream;
    private InputStream inputStream;
    private String ip;
    private int port;

    public Send(String msg, int port, String ip) {
        this.send = msg;
        this.ip = ip;
        this.port = port;
    }

    @Override
    public void run() {
        try {
            Socket socket = new Socket(ip, port);
            send = "客户端发来：" + send;
            inputStream = socket.getInputStream();
            outputStream = socket.getOutputStream();
            outputStream.write((send + "\n").getBytes("utf-8"));
            outputStream.flush();
            Log.v("AndroidChat", "发送成功：" + send);
        } catch (Exception e) {
            Log.v("AndroidChat", "发送失败：" + send + "error" + e.getMessage());
            e.printStackTrace();
        }

    }
}

登录后的界面

android项目mysql登录,android-studio

xlm文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity2"
    android:orientation="vertical">
<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentTop="true">
    <EditText
        android:id="@+id/ip"
        android:layout_width="200dp"
        android:layout_height="50dp"
        android:background="#7CB342"
        android:hint="@string/ip"
        android:textColor="#ffffff"
        />
    <EditText
        android:id="@+id/port"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:hint="@string/port"
        android:background="#C0CA33"
        android:layout_toEndOf="@id/ip"
        android:inputType="number"
        />
    <Button
        android:id="@+id/connect"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/port"
        android:text="@string/connection_server"/>

</RelativeLayout>
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        >
        <TextView
            android:id="@+id/receive"
            android:layout_width="match_parent"
            android:layout_height="290dp"
            android:background="#00ACC1"
            android:textColor="#FFFFFF"
            android:hint="@string/receive"
            android:textSize="18sp"
            android:gravity="center_horizontal"
            />
        <EditText
            android:id="@+id/send"
            android:layout_width="match_parent"
            android:layout_height="290dp"
            android:background="#3949AB"
            android:hint="@string/send"
            android:textColor="#ffffff"
            android:layout_below="@id/receive"/>
        <Button
            android:id="@+id/btn_1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/send1"
            android:layout_below="@+id/send"
            />

    </RelativeLayout>
<!--    <LinearLayout-->
<!--        android:layout_width="wrap_content"-->
<!--        android:layout_height="wrap_content"-->
<!--        android:gravity="left"-->
<!--    >-->
<!--        <TextView-->
<!--            android:layout_width="410dp"-->
<!--            android:layout_height="match_parent"-->
<!--            android:text="对话窗口"-->
<!--            android:gravity="center"-->
<!--            android:textSize="30dp"/>-->

<!--    </LinearLayout>-->
<!--    <LinearLayout-->
<!--        android:layout_width="match_parent"-->
<!--        android:layout_height="200dp"-->
<!--        android:layout_marginStart="0dp"-->
<!--        android:layout_marginTop="5dp"-->
<!--        android:layout_marginEnd="10dp"-->

<!--        android:gravity="center">-->

<!--        <EditText-->
<!--            android:id="@+id/edit_text"-->
<!--            android:layout_width="fill_parent"-->
<!--            android:layout_height="fill_parent"/>-->
<!--    </LinearLayout>-->



<!--&lt;!&ndash;    <TextView&ndash;&gt;-->
<!--&lt;!&ndash;        android:layout_width="match_parent"&ndash;&gt;-->
<!--&lt;!&ndash;        android:layout_height="wrap_content"&ndash;&gt;-->
<!--&lt;!&ndash;        android:gravity="center"&ndash;&gt;-->
<!--&lt;!&ndash;        android:text="登录成功"&ndash;&gt;-->
<!--&lt;!&ndash;        android:textSize="25dp"></TextView>&ndash;&gt;-->
<!--    <LinearLayout-->
<!--        android:layout_width="wrap_content"-->
<!--        android:layout_height="wrap_content"-->
<!--        android:gravity="left"-->
<!--        >-->
<!--        <TextView-->
<!--            android:layout_width="410dp"-->
<!--            android:layout_height="match_parent"-->
<!--            android:text="发送窗口"-->
<!--            android:gravity="center"-->
<!--            android:textSize="30dp"/>-->

<!--    </LinearLayout>-->
<!--    <LinearLayout-->
<!--        android:layout_width="match_parent"-->
<!--        android:layout_height="200dp"-->
<!--        android:layout_marginStart="0dp"-->
<!--        android:layout_marginTop="5dp"-->
<!--        android:layout_marginEnd="10dp"-->

<!--        android:gravity="center">-->

<!--        <EditText-->
<!--            android:id="@+id/edit_text1"-->
<!--            android:layout_width="fill_parent"-->
<!--            android:layout_height="fill_parent"/>-->
<!--    </LinearLayout>-->
<!--<LinearLayout-->
<!--    android:layout_width="match_parent"-->
<!--    android:layout_height="50dp"-->
<!--    >-->
<!--    <Button-->
<!--        android:layout_width="match_parent"-->
<!--        android:layout_height="match_parent"-->
<!--        android:text="发送"/>-->
<!--</LinearLayout>-->

</RelativeLayout>

MainActivity类

package com.example.longin_demo;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.example.longin_demo.tcp.ConnectThread;
import com.example.longin_demo.tcp.Send;

public class MainActivity2 extends AppCompatActivity {
    private Button mBtn_send;
    private Button mBtn_connect;
    private EditText mEt_send;
    private static TextView mTv_recv;
    private String ip;
    private int port;
    private String msg;
    private ConnectThread ct;
    private Send send;
    private Handler handler;
    static Receive re = new Receive();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        mTv_recv = findViewById(R.id.receive);
        mBtn_connect = findViewById(R.id.connect);
        mBtn_send = findViewById(R.id.btn_1);


        final EditText mEt_ip = this.findViewById(R.id.ip);
        final EditText mEt_port = this.findViewById(R.id.port);
        final EditText mEt_send = this.findViewById(R.id.send);

/*
设置一个点击事件用以连接线程
*/
        mBtn_connect.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ip = mEt_ip.getText().toString();//获取输入的ip
                port = Integer.parseInt(mEt_port.getText().toString());//获取输入的端口号

                ct = new ConnectThread(ip, port,re);//创建一个线程来处理消息的收发
                ct.start();
            }
        });
        /*
设计一个点击事件用以发送消息
*/
        mBtn_send.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                msg = mEt_send.getText().toString();
                send = new Send(msg, port, ip);
                send.start();

            }
        });

    }
    /*
    这里是和连接接收线程中的 re.setString(string) 联动的，自己理解一下怎么走在脑子里面走一次就差不多了。
    */
    public static class Receive{
        private  String string;
        public String getString(){
            return string;
        }
        public void setString(String s){
            this.string = s;
        }
    }
    /*
    下面的callback和连接接收线程中的 MainActivity.callback() 关联，线程运行到那一步后结束回到MainActivity中。
    */
    public static void callback(){
        System.out.println("连接线程执行结束");
        mTv_recv.setText(re.getString());//这里是将接收到的文字显示在接收框内。
    }

    }

这个就是大部分的代码了，我也上传了demo可以下载demo安装好环境是可以直接运行的。有什么不懂的欢迎评论区留言，多多交流

https://download.csdn.net/download/m0_61438105/87953707?spm=1001.2014.3001.5503

下载地址，这个有个小BUG每次连接发送完都需要从新连接一下，有没有大佬指导一下文章来源地址https://www.toymoban.com/news/detail-785888.html

到了这里，关于Android studio 通过mysql连接数据库完成注册登录，登陆后通过tcp协议与电脑的网络调试助手互发信息的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！