Android Student Information Management System (1) Login Interface Design

Simple student information management system, after clicking the login interface to register, an interface will pop up with 5 functions, which are adding, deleting, modifying, searching, and viewing all student information!

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/bj"
    android:orientation="vertical">
    <TextView
        android:layout_marginTop="100dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="欢迎来到学生信息管理系统"
        android:gravity="center"
        android:textSize="40sp"

        />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"

        android:orientation="horizontal">
        <TextView
            android:textColor="@color/colorAccent"
            android:layout_marginTop="40dp"
            android:id="@+id/user"
            android:layout_height="wrap_content"
            android:gravity="end"
            android:text="请输入你的账号："
            android:textSize="30sp"
            android:textStyle="bold"
            android:layout_width="wrap_content">
        </TextView>
        <EditText
            android:layout_marginTop="40dp"
            android:id="@+id/input1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:hint="                            " />
    </LinearLayout>
<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
        <TextView
            android:textColor="@color/colorAccent"
            android:id="@+id/password"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="end"
            android:text="请输入你的密码："
            android:textSize="30sp"
            android:textStyle="bold" />
        <EditText
            android:id="@+id/input2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:hint="                            " />
</LinearLayout>
<LinearLayout
    android:layout_marginTop="60dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
        <CheckBox
            android:layout_height="wrap_content"
            android:id="@+id/remember_button"
            android:layout_width="wrap_content"
            android:layout_marginLeft="50dp" />

        <TextView
            android:layout_marginLeft="60dp"
            android:id="@+id/remember_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
           android:textSize="18sp"
            android:text="是否保存本次密码"
            android:textStyle="bold" />
</LinearLayout>
    <ProgressBar
        android:layout_marginTop="20dp"
        android:id="@+id/progress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:max="250" />
    <Button
        android:layout_marginTop="30dp"
        android:id="@+id/login_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="120dp"
        android:layout_marginRight="15dp"
        android:background="#add8e6"
        android:text="点击注册进入"
        android:textSize="25sp" />
</LinearLayout>

package com.example.android;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View.OnClickListener;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;


public class MainActivity extends Activity implements OnClickListener{
    Button button;
    EditText edit1,edit2;
    CheckBox checkbox;
    ProgressBar bar;
    SharedPreferences pref;
    SharedPreferences.Editor editor;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button=(Button) findViewById(R.id.login_button);
        edit1=(EditText) findViewById(R.id.input1);
        edit2=(EditText) findViewById(R.id.input2);
        checkbox=(CheckBox) findViewById(R.id.remember_button);
        bar=(ProgressBar) findViewById(R.id.progress);//进度条
        pref= PreferenceManager.getDefaultSharedPreferences(this);
        boolean isRemember=pref.getBoolean("rem",false); //用于给是否保存密码赋值

        if(isRemember) {
            //将账号和密码设置到文本框中
            String account=pref.getString("account","");
            String password=pref.getString("password","");
            edit1.setText(account);
            edit2.setText(password);
            checkbox.setChecked(true);
        }
        button.setOnClickListener(this);
    }
    @Override
    public void onClick(View v){

        String account=edit1.getText().toString();
        String password=edit2.getText().toString();
        if(account.equals("0417200131") && password.equals("123456789")) {
            editor = pref.edit();
            if(checkbox.isChecked()) {
                editor.putBoolean("rem",true);
                editor.putString("account",account);
                editor.putString("password",password);
            }
            else {
                editor.clear();
            }
            editor.commit();
            Intent intent=new Intent(MainActivity.this,Main2Activity.class);
            startActivity(intent);

        }
        else{
            Toast.makeText(MainActivity.this,"账号或用户名错误",Toast.LENGTH_SHORT).show();
        }

    }
}