Android如何实现简易登陆注册实例源码

猿友 2021-06-22 16:36:00 浏览数 (3763)
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今天给大家带来Android如何实现简易登陆注册实例源码，希望能对各位W3Cschool学员有所帮助。

Android制作登录和注册

activity_login

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:app="http://schemas.android.com/apk/res-auto"
  4.     xmlns:tools="http://schemas.android.com/tools"
  5.     android:layout_width="match_parent"
  6.     android:layout_height="match_parent"
  7.     tools:context=".MainActivity">
  8.     <TextView
  9.         android:id="@+id/tv_username"
  10.         android:layout_width="wrap_content"
  11.         android:layout_height="40dp"
  12.         android:layout_marginStart="40dp"
  13.         android:layout_marginTop="100dp"
  14.         android:gravity="center_vertical"
  15.         android:text="账号："
  16.         app:layout_constraintLeft_toLeftOf="parent"
  17.         app:layout_constraintTop_toTopOf="parent" />
  18.     <TextView
  19.         android:id="@+id/tv_password"
  20.         android:layout_width="wrap_content"
  21.         android:layout_height="40dp"
  22.         android:layout_marginStart="40dp"
  23.         android:gravity="center_vertical"
  24.         android:text="密码："
  25.         app:layout_constraintLeft_toLeftOf="parent"
  26.         app:layout_constraintTop_toBottomOf="@id/tv_username" />
  27.     <EditText
  28.         android:id="@+id/ed_username"
  29.         android:layout_width="300dp"
  30.         android:layout_height="40dp"
  31.         android:layout_marginTop="100dp"
  32.         app:layout_constraintLeft_toRightOf="@id/tv_username"
  33.         app:layout_constraintTop_toTopOf="parent" />
  34.     <EditText
  35.         android:id="@+id/ed_password"
  36.         android:layout_width="300dp"
  37.         android:inputType="textPassword"
  38.         android:layout_height="40dp"
  39.         app:layout_constraintLeft_toRightOf="@id/tv_password"
  40.         app:layout_constraintTop_toBottomOf="@id/ed_username" />
  41.     <Button
  42.         android:id="@+id/bu_login"
  43.         android:layout_width="wrap_content"
  44.         android:layout_height="wrap_content"
  45.         android:layout_marginTop="300dp"
  46.         android:text="登录"
  47.         app:layout_constraintLeft_toLeftOf="parent"
  48.         app:layout_constraintRight_toLeftOf="@id/bu_register"
  49.         app:layout_constraintTop_toTopOf="parent" />
  50.     <Button
  51.         android:id="@+id/bu_register"
  52.         android:layout_width="wrap_content"
  53.         android:layout_height="wrap_content"
  54.         android:layout_marginTop="300dp"
  55.         android:text="注册"
  56.         app:layout_constraintLeft_toRightOf="@id/bu_login"
  57.         app:layout_constraintRight_toRightOf="parent"
  58.         app:layout_constraintTop_toTopOf="parent" />
  59. </androidx.constraintlayout.widget.ConstraintLayout>

LoginActivity

  1. package com.jld.exam;
  2. import android.content.Intent;
  3. import android.os.Bundle;
  4. import android.widget.Button;
  5. import android.widget.EditText;
  6. import android.widget.Toast;
  7. import androidx.appcompat.app.AppCompatActivity;
  8. public class LoginActivity extends AppCompatActivity {
  9.     EditText ed_username;
  10.     EditText ed_password;
  11.     Button bu_login;
  12.     Button bu_register;
  13.     String username;
  14.     String password;
  15.     @Override
  16.     protected void onCreate(Bundle savedInstanceState) {
  17.         super.onCreate(savedInstanceState);
  18.         setContentView(R.layout.activity_login);
  19.         ed_username = findViewById(R.id.ed_username);
  20.         ed_password = findViewById(R.id.ed_password);
  21.         bu_login = findViewById(R.id.bu_login);
  22.         bu_register = findViewById(R.id.bu_register);
  23.         //登录按钮监听
  24.         bu_login.setOnClickListener(v -> {
  25.             username = ed_username.getText().toString();
  26.             password = ed_password.getText().toString();
  27.             //登陆的简单逻辑
  28.             if (username.equals("")) {
  29.                 Toast.makeText(LoginActivity.this, "请输入用户名", Toast.LENGTH_SHORT).show();
  30.             } else if (password.equals("")) {
  31.                 Toast.makeText(LoginActivity.this, "请输入密码", Toast.LENGTH_SHORT).show();
  32.             } else if (!username.equals("root") || !password.equals("123456")) {
  33.                 Toast.makeText(LoginActivity.this, "用户名或密码错误", Toast.LENGTH_SHORT).show();
  34.             } else {
  35.                 Intent intent = new Intent(LoginActivity.this, MainActivity.class);
  36.                 startActivity(intent);
  37.             }
  38.         });
  39.         //注册按钮监听
  40.         bu_register.setOnClickListener(v -> {
  41.             Intent intent = new Intent(LoginActivity.this, RegisterActivity.class);
  42.             startActivity(intent);
  43.         });
  44.     }
  45. }

activity_main

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     android:orientation="vertical">
  6.     <TextView
  7.         android:layout_width="match_parent"
  8.         android:layout_height="wrap_content"
  9.         android:text="商品列表"
  10.         android:layout_marginBottom="30dp"
  11.         android:gravity="center_horizontal"/>
  12.     <androidx.recyclerview.widget.RecyclerView
  13.         android:id="@+id/recycler"
  14.         android:layout_width="match_parent"
  15.         android:layout_height="wrap_content" />
  16. </LinearLayout>

MainActivity

  1. package com.jld.exam;
  2. import android.graphics.Color;
  3. import android.os.Bundle;
  4. import android.widget.LinearLayout;
  5. import androidx.appcompat.app.AppCompatActivity;
  6. import androidx.recyclerview.widget.GridLayoutManager;
  7. import androidx.recyclerview.widget.RecyclerView;
  8. public class MainActivity extends AppCompatActivity {
  9.     RecyclerViewAdapter recyclerViewAdapter;
  10.     private final int[] icno = {R.drawable.clock, R.drawable.signal, R.drawable.box,
  11.             R.drawable.second, R.drawable.elephone, R.drawable.ff, R.drawable.notebook, R.drawable.mark, R.drawable.yx,
  12.             R.drawable.shop, R.drawable.theme, R.drawable.xl,};
  13.     private final String[] name = {"时钟", "信号", "宝箱", "秒钟", "大象", "FF", "记事本", "书签", "印象", "商店", "主题", "迅雷"};
  14.     @Override
  15.     protected void onCreate(Bundle savedInstanceState) {
  16.         super.onCreate(savedInstanceState);
  17.         setContentView(R.layout.activity_main);//GridLayoutManager
  18.         GridLayoutManager gridLayoutManager = new GridLayoutManager(MainActivity.this, 3);//创建recyclerview
  19.         RecyclerView recyclerView = findViewById(R.id.recycler);//设定布局管理器
  20.         recyclerView.setLayoutManager(gridLayoutManager);//创建适配器
  21.         recyclerViewAdapter = new RecyclerViewAdapter(icno, name);
  22.         recyclerView.setAdapter(recyclerViewAdapter);//设定适配器
  23.     }
  24. }

activity_register

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:app="http://schemas.android.com/apk/res-auto"
  4.     xmlns:tools="http://schemas.android.com/tools"
  5.     android:layout_width="match_parent"
  6.     android:layout_height="match_parent"
  7.     tools:context=".RegisterActivity">
  8.     <TextView
  9.         android:id="@+id/textView0"
  10.         android:layout_width="match_parent"
  11.         android:layout_height="60dp"
  12.         android:gravity="center"
  13.         android:text="用户注册"
  14.         android:textSize="30sp"
  15.         app:layout_constraintTop_toTopOf="parent" />
  16.     <TextView
  17.         android:id="@+id/textView1"
  18.         android:layout_width="100dp"
  19.         android:layout_height="40dp"
  20.         android:drawableStart="@drawable/account"
  21.         android:gravity="center_vertical"
  22.         android:text="用户名:"
  23.         app:layout_constraintLeft_toLeftOf="parent"
  24.         app:layout_constraintTop_toBottomOf="@id/textView0" />
  25.     <EditText
  26.         android:id="@+id/editText1"
  27.         android:layout_width="300dp"
  28.         android:layout_height="40dp"
  29.         android:layout_weight="10"
  30.         android:autofillHints=""
  31.         android:gravity="center_horizontal"
  32.         android:inputType="text"
  33.         app:layout_constraintLeft_toRightOf="@id/textView1"
  34.         app:layout_constraintTop_toBottomOf="@id/textView0" />
  35.     <TextView
  36.         android:id="@+id/textView2"
  37.         android:layout_width="100dp"
  38.         android:layout_height="40dp"
  39.         android:layout_weight="2"
  40.         android:drawableStart="@drawable/password"
  41.         android:gravity="center_vertical"
  42.         android:text="新密码:"
  43.         app:layout_constraintLeft_toLeftOf="parent"
  44.         app:layout_constraintTop_toBottomOf="@id/textView1" />
  45.     <EditText
  46.         android:id="@+id/editText2"
  47.         android:layout_width="300dp"
  48.         android:layout_height="40dp"
  49.         android:layout_weight="10"
  50.         android:autofillHints=""
  51.         android:gravity="center_horizontal"
  52.         android:inputType="textPassword"
  53.         app:layout_constraintLeft_toRightOf="@id/textView2"
  54.         app:layout_constraintTop_toBottomOf="@id/editText1" />
  55.     <TextView
  56.         android:id="@+id/textView5"
  57.         android:layout_width="100dp"
  58.         android:layout_height="40dp"
  59.         android:drawableStart="@drawable/phone"
  60.         android:gravity="center_vertical"
  61.         android:text="手机电话:"
  62.         app:layout_constraintLeft_toLeftOf="parent"
  63.         app:layout_constraintTop_toBottomOf="@id/textView2" />
  64.     <EditText
  65.         android:id="@+id/editText5"
  66.         android:layout_width="300dp"
  67.         android:layout_height="40dp"
  68.         android:layout_weight="10"
  69.         android:autofillHints=""
  70.         android:gravity="center_horizontal"
  71.         android:inputType="phone"
  72.         app:layout_constraintLeft_toRightOf="@id/textView5"
  73.         app:layout_constraintTop_toBottomOf="@id/editText2" />
  74.     <TextView
  75.         android:id="@+id/textView7"
  76.         android:layout_width="100dp"
  77.         android:layout_height="40dp"
  78.         android:drawableStart="@drawable/email"
  79.         android:gravity="center_vertical"
  80.         android:text="E_mail:"
  81.         app:layout_constraintLeft_toLeftOf="parent"
  82.         app:layout_constraintTop_toBottomOf="@id/editText5" />
  83.     <EditText
  84.         android:id="@+id/editText7"
  85.         android:layout_width="300dp"
  86.         android:layout_height="40dp"
  87.         android:layout_weight="10"
  88.         android:autofillHints=""
  89.         android:gravity="center_horizontal"
  90.         android:inputType="textEmailAddress"
  91.         app:layout_constraintLeft_toRightOf="@id/textView7"
  92.         app:layout_constraintTop_toBottomOf="@id/editText5" />
  93.     <TextView
  94.         android:id="@+id/textView8"
  95.         android:layout_width="100dp"
  96.         android:layout_height="40dp"
  97.         android:drawableStart="@drawable/gender"
  98.         android:gravity="center_vertical"
  99.         android:text="性别:"
  100.         app:layout_constraintLeft_toLeftOf="parent"
  101.         app:layout_constraintTop_toBottomOf="@id/textView7" />
  102.     <RadioGroup
  103.         android:id="@+id/radioGroup8"
  104.         android:layout_width="300dp"
  105.         android:layout_height="40dp"
  106.         android:layout_weight="10"
  107.         android:gravity="center_vertical"
  108.         android:orientation="horizontal"
  109.         app:layout_constraintLeft_toRightOf="@id/textView8"
  110.         app:layout_constraintTop_toBottomOf="@id/editText7">
  111.         <RadioButton
  112.             android:id="@+id/radioButton1"
  113.             android:layout_width="wrap_content"
  114.             android:layout_height="wrap_content"
  115.             android:text="女" />
  116.         <RadioButton
  117.             android:id="@+id/radioButton2"
  118.             android:layout_width="wrap_content"
  119.             android:layout_height="wrap_content"
  120.             android:text="男" />
  121.     </RadioGroup>
  122.     <Button
  123.         android:id="@+id/button1"
  124.         android:layout_width="wrap_content"
  125.         android:layout_height="wrap_content"
  126.         android:layout_marginTop="40dp"
  127.         android:text="保存"
  128.         app:layout_constraintEnd_toStartOf="@id/button2"
  129.         app:layout_constraintStart_toStartOf="parent"
  130.         app:layout_constraintTop_toBottomOf="@id/radioGroup8" />
  131.     <Button
  132.         android:id="@+id/button2"
  133.         android:layout_width="wrap_content"
  134.         android:layout_height="wrap_content"
  135.         android:layout_marginTop="40dp"
  136.         android:text="取消"
  137.         app:layout_constraintEnd_toEndOf="parent"
  138.         app:layout_constraintStart_toEndOf="@id/button1"
  139.         app:layout_constraintTop_toBottomOf="@id/radioGroup8" />
  140. </androidx.constraintlayout.widget.ConstraintLayout>

RegisterActivity

  1. package com.jld.exam;
  2. import androidx.appcompat.app.AppCompatActivity;
  3. import android.os.Bundle;
  4. public class RegisterActivity extends AppCompatActivity {
  5.     @Override
  6.     protected void onCreate(Bundle savedInstanceState) {
  7.         super.onCreate(savedInstanceState);
  8.         setContentView(R.layout.activity_register);
  9.     }
  10. }

recyc_item

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="wrap_content"
  5.     android:orientation="vertical">
  6.     <ImageView
  7.         android:id="@+id/iv_image"
  8.         android:layout_width="60dp"
  9.         android:layout_height="60dp"
  10.         android:layout_gravity="center_horizontal"
  11.         android:contentDescription="TODO"
  12.         android:scaleType="centerInside"
  13.         android:src="@drawable/ic_launcher_background" />
  14.     <TextView
  15.         android:id="@+id/tv_desc"
  16.         android:layout_width="match_parent"
  17.         android:layout_height="wrap_content"
  18.         android:gravity="center"
  19.         android:hint="销售价格"
  20.         android:textSize="14sp" />
  21. </LinearLayout>

RecyclerViewAdapter

  1. package com.jld.exam;
  2. import android.view.LayoutInflater;
  3. import android.view.View;
  4. import android.view.ViewGroup;
  5. import android.widget.ImageView;
  6. import android.widget.TextView;
  7. import androidx.annotation.NonNull;
  8. import androidx.recyclerview.widget.RecyclerView;
  9. public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
  10.     private final int[] icno;
  11.     private final String[] desc;
  12.     public RecyclerViewAdapter(int[] icno, String[] desc) {
  13.         this.icno = icno;
  14.         this.desc = desc;
  15.     }
  16.     @NonNull
  17.     @Override
  18.     public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
  19.         View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyc_item, parent, false);
  20.         return new ViewHolder(view);
  21.     }
  22.     @Override
  23.     public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
  24.         holder.imageView.setImageResource(icno[position]);
  25.         holder.textView.setText(desc[position]);
  26.     }
  27.     @Override
  28.     public int getItemCount() {
  29.         return icno.length;
  30.     }
  31.     //ViewHolder
  32.     public static class ViewHolder extends RecyclerView.ViewHolder {
  33.         View item;
  34.         ImageView imageView;
  35.         TextView textView;
  36.         public ViewHolder(@NonNull View itemView) {
  37.             super(itemView);
  38.             item = itemView;
  39.             imageView = itemView.findViewById(R.id.iv_image);
  40.             textView = itemView.findViewById(R.id.tv_desc);
  41.         }
  42.     }
  43. }

到此这篇关于Android如何实现简易登陆注册实例源码文章就写到这了。

Android

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