AndroidStudio基于Sqlite的登录注册（保姆级教程）

可在此基础上进行二次开发！

源码地址：源码请点击这里哟！

总的布局：

1、先创建一个空的项目

选好后直接Finish就行

 2、对activity_mian,xml文件进行布局

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="50dp"
        android:layout_marginTop="200dp"
        android:text="用户名："
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="50dp"
        android:layout_marginTop="280dp"
        android:text="密码："
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/edname1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="20dp"
        android:layout_marginTop="190dp"
        android:ems="10"
        android:inputType="textPersonName"
        app:layout_constraintStart_toEndOf="@+id/textView"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="TouchTargetSizeCheck,SpeakableTextPresentCheck" />

    <EditText
        android:id="@+id/edpassword1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginTop="270dp"
        android:ems="10"
        android:inputType="textPersonName"
        app:layout_constraintStart_toEndOf="@+id/textView2"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="TouchTargetSizeCheck,SpeakableTextPresentCheck" />

    <Button
        android:id="@+id/login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="80dp"
        android:layout_marginTop="380dp"
        android:text="登录"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/register"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="380dp"
        android:layout_marginEnd="80dp"
        android:text="注册"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

3、MainActivity代码

package com.example.mypracticeone;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private EditText edname,edpassword;
    private Button login,register;
    private MySqliteHelper mySqliteHelper;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mySqliteHelper = new MySqliteHelper(this);
        find();
    }
    private void find() {
        edname = findViewById(R.id.edname1);
        edpassword = findViewById(R.id.edpassword1);
        login = findViewById(R.id.login);
        register = findViewById(R.id.register);

        login.setOnClickListener(this);
        register.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        int id = view.getId();
        switch (id){
            case R.id.login:
                String s = edname.getText().toString();
                String s1 = edpassword.getText().toString();
                boolean login = mySqliteHelper.login(s,s1);
                if (login){
                    Intent i = new Intent(this,Good.class);
                    startActivity(i);
                }else {
                    Toast.makeText(this,"登陆失败！",Toast.LENGTH_SHORT).show();
                }
                break;
            case R.id.register:
                Intent i1 = new Intent(this,Register.class);
                startActivity(i1);
                break;
        }
    }
}

 4、User类的代码：

package com.example.mypracticeone.bean;

public class User {
    private String name;
    private String password;

    public User() {
    }

    public User(String name, String password) {
        this.name = name;
        this.password = password;
    }

    public String getName() {
        return name;
    }

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

    public String getPassword() {
        return password;
    }

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

    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

5、MySqliteHelper类的代码：

package com.example.mypracticeone;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import androidx.annotation.Nullable;

import com.example.mypracticeone.bean.User;

public class MySqliteHelper extends SQLiteOpenHelper {

    private static final String DB_NAME = "MYsqlite.db";
    private static final String create_users = "create table users(name varchar(32),password varchar(32))";

    public MySqliteHelper(@Nullable Context context) {
        super(context, DB_NAME, null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {
        sqLiteDatabase.execSQL(create_users);
    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {

    }

    public long register(User u){
        SQLiteDatabase db = getWritableDatabase();
        ContentValues cv = new ContentValues();
        cv.put("name",u.getName());
        cv.put("password",u.getPassword());
        long users = db.insert("users",null,cv);
        return users;
    }

    public boolean login(String name,String password){
        SQLiteDatabase db1 = getWritableDatabase();
        boolean result = false;

        Cursor users = db1.query("users",null,"name like ?",new String[]{name},null,null,null);
        if(users != null){
            while (users.moveToNext()){
                String password1 = users.getString(1);
                result = password1.equals(password);
                return result;
            }
        }
        return result;
    }
}

6、Good与Register类都为创建的Empty Activity

7、Good类的代码：

package com.example.mypracticeone;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

public class Good extends AppCompatActivity {

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

 activity_good.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".Good">

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="150dp"
        android:layout_marginTop="200dp"
        android:text="HelloWorld"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

8、Register类的代码：

package com.example.mypracticeone;

import androidx.appcompat.app.AppCompatActivity;

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

import com.example.mypracticeone.bean.User;

public class Register extends AppCompatActivity{

    private EditText edname1,edpassword1;
    private Button register1;
    private MySqliteHelper mySqliteHelper;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        mySqliteHelper = new MySqliteHelper(this);
        find();
    }
    private void find(){
        edname1 = findViewById(R.id.edname1);
        edpassword1 = findViewById(R.id.edpassword1);
        register1 = findViewById(R.id.login);
    }

    public void register(View view) {
        String s = edname1.getText().toString();
        String s1 = edpassword1.getText().toString();
        User u = new User(s,s1);
        long l = mySqliteHelper.register(u);
        if(l!=-1){
            Toast.makeText(this,"注册成功!",Toast.LENGTH_SHORT).show();
            Intent i3 = new Intent(this,MainActivity.class);
            startActivity(i3);
        }else {
            Toast.makeText(this,"注册失败！",Toast.LENGTH_SHORT).show();
        }
    }
}

activity_register.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".Register">

<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="50dp"
android:layout_marginTop="200dp"
android:text="用户名："
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="50dp"
android:layout_marginTop="280dp"
android:text="密码："
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

<EditText
android:id="@+id/edname1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:layout_marginTop="190dp"
android:ems="10"
android:inputType="textPersonName"
app:layout_constraintStart_toEndOf="@+id/textView"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="TouchTargetSizeCheck,SpeakableTextPresentCheck" />

<EditText
android:id="@+id/edpassword1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="30dp"
android:layout_marginTop="270dp"
android:ems="10"
android:inputType="textPersonName"
app:layout_constraintStart_toEndOf="@+id/textView2"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="TouchTargetSizeCheck,SpeakableTextPresentCheck" />

    <Button
        android:id="@+id/login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="150dp"
        android:layout_marginTop="380dp"
        android:text="注册"
        android:onClick="register"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

文章来源地址https://www.toymoban.com/news/detail-495349.html

喜欢的话就点赞收藏关注一下吧，要不然到以后就找不到了哟！！！ 

到了这里，关于AndroidStudio基于Sqlite的登录注册（保姆级教程）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！