简单记事本app2

——注册——

activity_login.xml 注册页面设计

<?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:orientation="vertical"
      android:padding="10dp"
      android:background="@color/yellow"
      tools:context=".MainActivity">

<TextView
        android:layout_width="match_parent"
            android:layout_height="50dp"
            android:text="OvO"
            android:textColor="@color/orange"
            android:textSize="35sp"
            android:gravity="center"
            android:layout_marginTop="100dp"/>

<LinearLayout
        android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:layout_marginTop="30dp">
<EditText
            android:id="@+id/lg_et_name"
               android:layout_width="match_parent"
               android:layout_height="50dp"
               android:textSize="16sp"
               android:textColor="@color/black"
               android:hint="  用户名"
               android:maxLines="1"
               android:background="@drawable/bg_frame"
               />
<EditText
            android:id="@+id/lg_et_password"
               android:layout_width="match_parent"
               android:layout_height="50dp"
               android:textSize="16dp"
               android:textColor="@color/black"
               android:hint="  密    码"
               android:inputType="textPassword"
               android:layout_marginTop="5dp"
               android:maxLines="1"
               android:background="@drawable/bg_frame"
               />
<EditText
            android:id="@+id/lg_et_phone"
               android:layout_width="match_parent"
               android:layout_height="50dp"
               android:textSize="16dp"
               android:textColor="@color/black"
               android:hint="  电话号"
               android:layout_marginTop="5dp"
               android:maxLines="1"
               android:background="@drawable/bg_frame"
               />
<EditText
            android:id="@+id/lg_et_uno"
               android:layout_width="match_parent"
               android:layout_height="50dp"
               android:textSize="16dp"
               android:textColor="@color/black"
               android:hint="  学生/教师"
               android:layout_marginTop="5dp"
               android:maxLines="1"
               android:background="@drawable/bg_frame"
               />
<EditText
            android:id="@+id/lg_et_id"
               android:layout_width="match_parent"
               android:layout_height="50dp"
               android:textSize="16dp"
               android:textColor="@color/black"
               android:hint="  学号/教师编号"
               android:layout_marginTop="5dp"
               android:maxLines="1"
               android:background="@drawable/bg_frame"
               />
<EditText
            android:id="@+id/lg_et_classs"
               android:layout_width="match_parent"
               android:layout_height="50dp"
               android:textSize="16dp"
               android:textColor="@color/black"
               android:hint="  班级/用户单位"
               android:layout_marginTop="5dp"
               android:maxLines="1"
               android:background="@drawable/bg_frame"
               />
</LinearLayout>

<Button
            android:id="@+id/lg_btn_login"
               android:layout_width="match_parent"
               android:layout_height="wrap_content"
               android:text="注册"
               android:textColor="@color/black"
               android:background="@drawable/bg_frame"
               android:layout_marginLeft="2dp"
               android:layout_marginTop="50dp"
               />

</LinearLayout>

LoginActivity.java 注册界面后台代码，注册成功之后会跳回到登录界面

package com.example.text002;

import static db.DBManager.getUserlogin;
import static db.DBManager.getUserstart;

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 LoginActivity extends AppCompatActivity implements View.OnClickListener {

   private EditText lgid, lgname, lgpassword, lgphone, lgclasss, lguno;
   private Button lg_login;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_login);
      lgfind();
   }

   private void lgfind() {
      lgid = findViewById(R.id.lg_et_id);
      lgname = findViewById(R.id.lg_et_name);
      lgpassword = findViewById(R.id.lg_et_password);
      lgphone = findViewById(R.id.lg_et_phone);
      lgclasss = findViewById(R.id.lg_et_classs);
      lguno = findViewById(R.id.lg_et_uno);

      lg_login = findViewById(R.id.lg_btn_login);
      lg_login.setOnClickListener(this);
   }

   @Override
   public void onClick(View view) {
      int lg_vid = view.getId();
      if(lg_vid == R.id.lg_btn_login){
         //注册
         String lguid = lgid.getText().toString();
         String lguname = lgname.getText().toString();
         String lgupassword = lgpassword.getText().toString();
         String lguphone = lgphone.getText().toString();
         String lguclasss = lgclasss.getText().toString();
         String lgunos = lguno.getText().toString();
         //        insert into user (id,    name,    uno,   classs,     phone,    password)
         Boolean flag = getUserlogin(lguid, lguname, lgunos, lguclasss, lguphone, lgupassword);
         if(flag){
            Toast.makeText(this,"注册成功OvO",Toast.LENGTH_SHORT).show();
            Intent intent = new Intent(LoginActivity.this,MainActivity.class);
            startActivity(intent);
         } else {
            Toast.makeText(this,"注册失败TAT",Toast.LENGTH_SHORT).show();
         }

      }
   }
}

下一篇写登录之后