文章目录
0.目前情况:
1.实现功能
登录:账号,密码不为空;记住密码;登录成功后跳转至主页面
注册:账号、密码、确认密码不为空;同意条款;账号没有被注册过;密码和确认密码一直;跳转回登录页面
2.实现后:
(1)注册:
; (2)登录
1.代码目录
; 2.代码:
1.manifests.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mainapp_bleda2">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="步态压力监测系统"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.MaterialComponents.Light.NoActionBar"
android:usesCleartextTraffic="true">
<activity android:name=".MainActivity">activity>
<activity android:name=".LoginActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
<activity android:name=".RegisterActivity" >activity>
application>
manifest>
2.User.java
package com.example.mainapp_bleda2.bean;
public class User {
String account;
String pass;
public String getAccount() {
return account;
}
public void setAccount(String account) {
this.account = account;
}
public String getPass() {
return pass;
}
public void setPass(String pass) {
this.pass = pass;
}
@Override
public String toString() {
return "User{" +
"account='" + account + '\'' +
", pass='" + pass + '\'' +
'}';
}
}
3.ToastUtil.java
package com.example.mainapp_bleda2.utils;
import android.content.Context;
import android.widget.Toast;
public class ToastUtil {
public static void toastShort(Context context, String msg){
Toast.makeText(context,msg,Toast.LENGTH_SHORT).show();
}
public static void toastLong(Context context, String msg){
Toast.makeText(context,msg,Toast.LENGTH_LONG).show();
}
}
4.LoginActivity.java
package com.example.mainapp_bleda2;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.nfc.Tag;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import com.example.mainapp_bleda2.bean.User;
import org.w3c.dom.Text;
import java.util.List;
public class LoginActivity extends AppCompatActivity {
private Button btnLogin;
private EditText etAccount, etPassword;
private TextView toReg;
private CheckBox cb_Remember;
private MySQLiteOpenHelper mySQLiteOpenHelper;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
initView();
initData();
btnLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String account = etAccount.getText().toString();
String password = etPassword.getText().toString();
List<User> userList = mySQLiteOpenHelper.selectByAccountAndPass(account,password);
System.out.println(userList);
if(!userList.isEmpty()){
Toast.makeText(LoginActivity.this,"登录成功!",Toast.LENGTH_LONG).show();
if(cb_Remember.isChecked()){
SharedPreferences spf = getSharedPreferences("spfRecorid",MODE_PRIVATE);
SharedPreferences.Editor edit = spf.edit();
edit.putString("account", account);
edit.putString("password",password);
edit.putBoolean("isRemember",true);
edit.apply();
}else{
SharedPreferences spf = getSharedPreferences("spfRecorid",MODE_PRIVATE);
SharedPreferences.Editor edit = spf.edit();
edit.putBoolean("isRemember",false);
edit.apply();
}
Intent intent = new Intent(LoginActivity.this,MainActivity.class);
startActivity(intent);
}else{
Toast.makeText(LoginActivity.this,"账号或密码错误!",Toast.LENGTH_LONG).show();
}
}
});
toReg = findViewById(R.id.toReg);
toReg.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(LoginActivity.this,RegisterActivity.class);
startActivity(intent);
}
});
}
private void initView(){
btnLogin = findViewById(R.id.btn_login);
etAccount = findViewById(R.id.et_account);
etPassword = findViewById(R.id.et_password);
mySQLiteOpenHelper = new MySQLiteOpenHelper(this);
cb_Remember = findViewById(R.id.cb_Remember);
}
private void initData(){
SharedPreferences spf = getSharedPreferences("spfRecorid",MODE_PRIVATE);
boolean isRem = spf.getBoolean("isRemember",false);
String account = spf.getString("account","");
String password = spf.getString("password","");
if(isRem){
etAccount.setText(account);
etPassword.setText(password);
cb_Remember.setChecked(true);
}
}
}
5.RegisterActivity.java
package com.example.mainapp_bleda2;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.example.mainapp_bleda2.bean.User;
import com.example.mainapp_bleda2.utils.ToastUtil;
import java.util.List;
public class RegisterActivity extends AppCompatActivity implements View.OnClickListener{
private EditText etAccount, etPass, etPassConfirm;
private Button btnRegister, button2;
private CheckBox cbAgree;
private MySQLiteOpenHelper mySQLiteOpenHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
button2 = (Button) findViewById(R.id.button2);
etAccount = findViewById(R.id.et_account1);
etPass = findViewById(R.id.et_password1);
etPassConfirm = findViewById(R.id.et_password_confirm);
btnRegister = findViewById(R.id.btn_register);
cbAgree = findViewById(R.id.cb_Agree);
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(RegisterActivity.this,LoginActivity.class);
startActivity(intent);
}
});
btnRegister.setOnClickListener(this);
}
@Override
public void onClick(View view) {
String account = etAccount.getText().toString().trim();
String pass = etPass.getText().toString().trim();
String passConfirm = etPassConfirm.getText().toString();
if(TextUtils.isEmpty(account)){
Toast.makeText(RegisterActivity.this,"用户名不能为空", Toast.LENGTH_LONG).show();
return;
}
mySQLiteOpenHelper = new MySQLiteOpenHelper(this);
List<User> userList = mySQLiteOpenHelper.selectByAccount(account);
if(!userList.isEmpty()){
Toast.makeText(RegisterActivity.this,"该账号已经被注册!",Toast.LENGTH_LONG).show();
return;
}
if(TextUtils.isEmpty(pass)){
Toast.makeText(RegisterActivity.this,"密码不能为空",Toast.LENGTH_LONG).show();
return;
}
if(!TextUtils.equals(pass,passConfirm)){
Toast.makeText(RegisterActivity.this,"两次密码不一致",Toast.LENGTH_LONG).show();
return;
}
if(!cbAgree.isChecked()){
Toast.makeText(RegisterActivity.this,"请同意用户协议",Toast.LENGTH_LONG).show();
return;
}
User user = new User();
user.setAccount(account);
user.setPass(pass);
mySQLiteOpenHelper = new MySQLiteOpenHelper(this);
long rowId = mySQLiteOpenHelper.insertData(user);
if(rowId != -1){
ToastUtil.toastShort(this,"注册成功");
Intent intent = new Intent(RegisterActivity.this,LoginActivity.class);
startActivity(intent);
}else {
ToastUtil.toastShort(this,"注册失败");
}
}
}
6.MySQLiteOpenHelper.java
package com.example.mainapp_bleda2;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.text.TextUtils;
import androidx.annotation.Nullable;
import com.example.mainapp_bleda2.bean.User;
import com.example.mainapp_bleda2.utils.ToastUtil;
import java.util.ArrayList;
import java.util.List;
public class MySQLiteOpenHelper extends SQLiteOpenHelper {
private static final String DB_NAME = "mySQLite.db";
private static final String TABLE_NAME_USER = "user";
private static final String CREATE_TABLE_SQL = "create table " + TABLE_NAME_USER + "(id INTEGER PRIMARY KEY AUTOINCREMENT, account text, pass text)";
public MySQLiteOpenHelper(Context context) {
super(context, DB_NAME, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_TABLE_SQL);
}
@Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
}
public long insertData(User user){
SQLiteDatabase db = getWritableDatabase();
ContentValues values = new ContentValues();
values.put("account",user.getAccount());
values.put("pass",user.getPass());
return db.insert(TABLE_NAME_USER,null,values);
}
public List<User> selectByAccountAndPass(String account, String password) {
SQLiteDatabase db = getReadableDatabase();
Cursor cursor = db.query(TABLE_NAME_USER, null, "account=? and pass=?", new String[]{account, password}, null, null, null);
List<User> userList = new ArrayList<>();
if (cursor != null) {
while (cursor.moveToNext()) {
String account1 = cursor.getString(cursor.getColumnIndex("account"));
String password1 = cursor.getString(cursor.getColumnIndex("pass"));
User user = new User();
user.setAccount(account1);
user.setPass(password1);
userList.add(user);
}
return userList;
}
return null;
}
public List<User> selectByAccount(String account) {
SQLiteDatabase db = getReadableDatabase();
Cursor cursor = db.query(TABLE_NAME_USER, null, "account=?", new String[]{account}, null, null, null);
List<User> userList = new ArrayList<>();
if (cursor != null) {
while (cursor.moveToNext()) {
String account1 = cursor.getString(cursor.getColumnIndex("account"));
User user = new User();
user.setAccount(account1);
userList.add(user);
}
return userList;
}
return null;
}
}
7. btn_bg_selector.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="@color/colorPrimary"/>
<item android:state_pressed="false" android:drawable="@color/colorPrimaryVariant"/>
selector>
8.edit_text_bg.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<stroke android:width="2dp" android:color="@color/colorPrimary"/>
<corners android:radius="10dp"/>
shape>
9.activity_register.xml
<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=".RegisterActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="10dp"
android:gravity="left">
<ImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_marginLeft="-30dp"
android:layout_marginTop="-30dp"
android:src="@mipmap/ic_launcher_foreground"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center_vertical"
android:layout_marginTop="-10dp"
android:layout_marginLeft="-33dp"
android:text="步态压力监测系统"
android:textSize="30sp" />
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="账号:"
android:textSize="25dp"
android:gravity="center_vertical"/>
<EditText
android:id="@+id/et_account1"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="请输入手机号"
android:textSize="18dp"
android:layout_marginLeft="20dp"
android:paddingLeft="10dp"
android:inputType="number"
android:background="@drawable/edit_text_bg"/>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="40dp"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="密码:"
android:textSize="25dp"
android:gravity="center_vertical"/>
<EditText
android:id="@+id/et_password1"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="请输入密码"
android:textSize="18dp"
android:layout_marginLeft="20dp"
android:paddingLeft="10dp"
android:inputType="textPassword"
android:background="@drawable/edit_text_bg"/>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="40dp"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="确认密码:"
android:textSize="25dp"
android:gravity="center_vertical"/>
<EditText
android:id="@+id/et_password_confirm"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="请再次输入密码"
android:textSize="18dp"
android:layout_marginLeft="20dp"
android:paddingLeft="10dp"
android:inputType="textPassword"
android:background="@drawable/edit_text_bg"/>
LinearLayout>
<CheckBox
android:id="@+id/cb_Agree"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="同意协议"
android:layout_marginLeft="20dp"
android:layout_marginTop="10dp"/>
<Button
android:id="@+id/btn_register"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="注册"
android:textSize="25sp"
android:layout_marginTop="40dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:textColor="@color/white"
android:background="@drawable/btn_bg_selector"/>
<Button
android:id="@+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="已有账号"
android:textSize="25sp"
android:layout_marginTop="20dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:textColor="@color/white"
android:background="@drawable/btn_bg_selector"/>
LinearLayout>
10.login.xml
<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=".LoginActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="40dp"
android:gravity="center_horizontal"
>
<ImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:src="@mipmap/ic_launcher_foreground"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center_vertical"
android:text="步态压力监测系统"
android:textSize="43sp"
android:layout_marginTop="-35dp"/>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="50dp"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="账号:"
android:textSize="25dp"
android:gravity="center_vertical"/>
<EditText
android:id="@+id/et_account"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="请输入手机号"
android:textSize="18dp"
android:layout_marginLeft="20dp"
android:paddingLeft="10dp"
android:inputType="number"
android:background="@drawable/edit_text_bg"/>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="40dp"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="密码:"
android:textSize="25dp"
android:gravity="center_vertical"/>
<EditText
android:id="@+id/et_password"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="请输入密码"
android:textSize="18dp"
android:layout_marginLeft="20dp"
android:paddingLeft="10dp"
android:inputType="textPassword"
android:background="@drawable/edit_text_bg"/>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="20dp"
>
<CheckBox
android:id="@+id/cb_Remember"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="记住密码"/>
LinearLayout>
<Button
android:id="@+id/btn_login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登录"
android:textSize="25sp"
android:layout_marginTop="20dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:textColor="@color/white"
android:background="@drawable/btn_bg_selector"/>
<TextView
android:id="@+id/toReg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/colorPrimary"
android:text="还没有账号?"
android:layout_gravity="right"
android:layout_marginRight="2dp"
android:layout_marginTop="10dp"/>
LinearLayout>
11.theam.xml
<resources xmlns:tools="http://schemas.android.com/tools">
<color name="colorPrimary">@color/purple_500color>
<color name="colorPrimaryVariant">@color/purple_700color>
<style name="Theme.SimpleAndroidApp" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
"colorPrimary">@color/purple_500
"colorPrimaryVariant">@color/purple_700
"colorOnPrimary">@color/white
"colorSecondary">@color/teal_200
"colorSecondaryVariant">@color/teal_700
"colorOnSecondary">@color/black
"android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant
style>
resources>
Original: https://blog.csdn.net/alovelypeach/article/details/122649334
Author: 我很好请走开谢谢
Title: 【Android】登录注册完整版~SQLite存储、记住密码
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