安卓判断两次输入的密码是否相等且不为空
前言
在Android开发、学习的过程当中，设计一个登录、注册页面是最基础的能力。注册时需要判断用户输入的密码是否为空、两次输入的密码是否相等，并且为了方便用户使用，在注册成功之后，应当将用户名传递到登录页面的用户名输入框内。下面就简单地展示一下。
XML 文件
Login页面
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/fullscreenBackgroundColor"
android:theme="@style/ThemeOverlay.KDAPP.FullscreenContainer"
>
<ImageView
android:id="@+id/iv_share_bg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerCrop"
android:src="@drawable/loginpage"
android:tileMode="disabled" />
<Button
android:id="@+id/login_login_button"
android:layout_width="wrap_content"
android:layout_height="65dp"
android:layout_above="@+id/login_mines_title"
android:layout_alignParentStart="true"
android:layout_alignParentEnd="true"
android:layout_centerHorizontal="true"
android:layout_marginStart="20dp"
android:layout_marginEnd="20dp"
android:layout_marginBottom="15dp"
android:fontFamily="@font/zh_blod"
android:shadowColor="@color/white"
android:text="登录"
android:textSize="20sp" />
<LinearLayout
android:id="@+id/multi_function"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_centerInParent="true"
android:layout_marginStart="20dp"
android:layout_marginEnd="20dp"
android:layout_marginBottom="20dp"
android:orientation="horizontal">
<Button
android:id="@+id/login_signup_button"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="65dp"
android:fontFamily="@font/zh_blod"
android:shadowColor="@color/white"
android:text="注册"
android:textColor="@color/black"
android:textColorHint="@color/white"
android:textSize="20sp" />
<ImageButton
android:id="@+id/QQ"
android:layout_width="0dp"
android:layout_height="65dp"
android:layout_weight="1"
android:fontFamily="@font/blod"
android:shadowColor="@color/white"
android:src="@drawable/qq"
android:scaleType="centerInside"
android:textColor="@color/black"
android:textColorHint="@color/white"
android:textSize="15sp" />
<ImageButton
android:id="@+id/Wechat"
android:layout_width="0dp"
android:layout_height="65dp"
android:layout_weight="1"
android:fontFamily="@font/blod"
android:shadowColor="@color/white"
android:src="@drawable/wechat"
android:scaleType="centerInside"
android:textColor="@color/black"
android:textColorHint="@color/white"
android:textSize="15sp" />
</LinearLayout>
<TextView
android:id="@+id/login_main_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="25dp"
android:layout_marginTop="25dp"
android:layout_marginEnd="5dp"
android:fontFamily="@font/zh_blod"
android:text="@string/loginpage_main_title"
android:textColor="@color/white"
android:textSize="50sp" />
<TextView
android:id="@+id/login_mines_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@id/multi_function"
android:layout_centerInParent="true"
android:layout_marginStart="22dp"
android:layout_marginBottom="15dp"
android:fontFamily="@font/blod"
android:text="@string/loginpage_page_mines_title"
android:textColor="@color/white"
android:textSize="15sp" />
<EditText
android:id="@+id/editTextTextPassword"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_above="@+id/login_login_button"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:layout_marginBottom="15dp"
android:fontFamily="@font/blod"
android:inputType="textPassword"
android:textColor="@color/white"
android:textSize="15sp"
android:theme="@style/MyEditText" />
<TextView
android:id="@+id/login_password_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/editTextTextPassword"
android:layout_marginStart="25dp"
android:layout_marginBottom="5dp"
android:fontFamily="@font/zh_weibei"
android:text="密码"
android:textColor="@color/white"
android:textSize="20sp" />
<EditText
android:id="@+id/editTextTextUserName"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_above="@+id/login_password_textview"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:layout_marginBottom="10dp"
android:fontFamily="@font/blod"
android:inputType="textNoSuggestions"
android:textColor="@color/white"
android:textSize="15sp"
android:theme="@style/MyEditText" />
<TextView
android:id="@+id/login_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/editTextTextUserName"
android:layout_marginStart="25dp"
android:layout_marginBottom="5dp"
android:fontFamily="@font/zh_weibei"
android:text="用户名"
android:textColor="@color/white"
android:textSize="20sp" />
</RelativeLayout>
Sign Up 页面
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/fullscreenBackgroundColor"
android:theme="@style/ThemeOverlay.KDAPP.FullscreenContainer"
>
<ImageView
android:id="@+id/iv_share_bg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerCrop"
android:src="@drawable/loginpage"
android:tileMode="disabled" />
<Button
android:id="@+id/signup_signup_button"
android:layout_width="wrap_content"
android:layout_height="65dp"
android:layout_alignParentStart="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginStart="20dp"
android:layout_marginEnd="20dp"
android:layout_marginBottom="20dp"
android:fontFamily="@font/zh_blod"
android:shadowColor="@color/white"
android:shadowRadius="@android:integer/config_shortAnimTime"
android:text="注册"
android:textColor="@color/black"
android:textColorHint="@color/white"
android:textSize="20sp" />
<TextView
android:id="@+id/login_main_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="25dp"
android:layout_marginTop="25dp"
android:layout_marginEnd="5dp"
android:fontFamily="@font/zh_blod"
android:text="@string/signup_main_title"
android:textColor="@color/white"
android:textSize="50sp" />
<EditText
android:id="@+id/editTextPhone"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_above="@+id/signup_signup_button"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:layout_marginBottom="10dp"
android:inputType="text"
android:fontFamily="@font/blod"
android:textSize="15sp"
android:textColor="@color/white"
android:theme="@style/MyEditText" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/editTextPhone"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:layout_marginBottom="10dp"
android:fontFamily="@font/zh_weibei"
android:text="邀请码"
android:textColor="@color/white"
android:textSize="20sp" />
<EditText
android:id="@+id/editTextTextEmailAddress"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_above="@+id/textView"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:layout_marginBottom="10dp"
android:fontFamily="@font/blod"
android:textSize="15sp"
android:inputType="textEmailAddress"
android:textColor="@color/white"
android:theme="@style/MyEditText" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/editTextTextEmailAddress"
android:layout_marginBottom="10dp"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:textColor="@color/white"
android:text="电子邮箱地址"
android:fontFamily="@font/zh_weibei"
android:textSize="20sp"/>
<EditText
android:id="@+id/editTextTextPassword4"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_above="@+id/textView2"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:layout_marginBottom="10dp"
android:fontFamily="@font/blod"
android:inputType="textPassword"
android:textColor="@color/white"
android:textSize="15sp"
android:theme="@style/MyEditText" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/editTextTextPassword4"
android:layout_marginBottom="10dp"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:text="再次输入密码"
android:textColor="@color/white"
android:fontFamily="@font/zh_weibei"
android:textSize="20sp"/>
<EditText
android:id="@+id/editTextTextPassword5"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_above="@+id/textView3"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:layout_marginBottom="10dp"
android:fontFamily="@font/blod"
android:inputType="textPassword"
android:textColor="@color/white"
android:textSize="15sp"
android:theme="@style/MyEditText" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/editTextTextPassword5"
android:layout_marginBottom="10dp"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:text="密码"
android:textColor="@color/white"
android:fontFamily="@font/zh_weibei"
android:textSize="20sp"/>
<EditText
android:id="@+id/editTextTextPersonName"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_above="@+id/textView4"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:layout_marginBottom="10dp"
android:fontFamily="@font/blod"
android:textColor="@color/white"
android:textSize="15sp"
android:theme="@style/MyEditText" />
<TextView
android:id="@+id/textView5"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/editTextTextPersonName"
android:layout_marginStart="25dp"
android:layout_marginEnd="25dp"
android:layout_marginBottom="10dp"
android:fontFamily="@font/zh_weibei"
android:text="用户名"
android:textColor="@color/white"
android:textSize="20sp" />
</RelativeLayout>
Activity 中的动作判断代码
Login
package com.example.kdapp;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ActivityOptions;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class login extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//强制使用竖屏
if(getRequestedOrientation()!= ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE){
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
super.onResume();
Intent getusername = getIntent();
String getintentusername = null;
getintentusername = getusername.getStringExtra("username");
EditText username = findViewById(R.id.editTextTextUserName);
if (getintentusername !=""){
username.setText(getintentusername);
}
//注册按钮的逻辑操作
Button button_signup = (Button) this.findViewById(R.id.login_signup_button);
button_signup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent1 = new Intent();
intent1.setClass(login.this,signup.class);
//startActivity(intent1);
startActivity(intent1, ActivityOptions.makeSceneTransitionAnimation(login.this).toBundle());
}
});
}
}
Sign Up
package com.example.kdapp;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ActivityOptions;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class signup extends AppCompatActivity {
private EditText editTextTextPersonName;
private EditText editTextTextPassword5;
private EditText editTextTextPassword4;
private Button button_signup;
private String username = null;
private String password1 = null;
private String password2 = null;
private View.OnClickListener PasswordCheck = new View.OnClickListener(){
@Override
public void onClick(View view){
switch (view.getId()){
case R.id.signup_signup_button:
//点击注册
username = editTextTextPersonName.getText().toString();
password1 = editTextTextPassword5.getText().toString();
password2 = editTextTextPassword4.getText().toString();
//验证密码是否一致
if(check()){
// 通过验证
Toast.makeText(signup.this,
"用户" + username + "注册成功!" + "\n" + "密码是" + password1,
Toast.LENGTH_SHORT).show();
//页面跳转，顺道传参
Intent intent1 = new Intent();
intent1.setClass(signup.this,login.class);
//startActivity(intent1);
intent1.putExtra("username",username);//传递注册成功的用户名
startActivity(intent1, ActivityOptions.makeSceneTransitionAnimation(signup.this).toBundle());
}else {
// 不能通过验证
Toast.makeText(signup.this, "用户" + username + "注册失败!",
Toast.LENGTH_SHORT).show();
}
break;
default:
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_signup);
editTextTextPersonName = (EditText) findViewById(R.id.editTextTextPersonName);
editTextTextPassword5 = (EditText)findViewById(R.id.editTextTextPassword5);
editTextTextPassword4 = (EditText)findViewById(R.id.editTextTextPassword4);
button_signup = (Button) this.findViewById(R.id.signup_signup_button);
//强制使用竖屏
if(getRequestedOrientation()!= ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE){
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
super.onResume();
//判断密码位置是否输入为空、输入是否相等
button_signup.setOnClickListener(PasswordCheck);
}
private boolean check(){
if ((password1.equals(password2)) && (username != "") && (username.length() != 0)
&& (password1 != "") && (password1.length() != 0))
// 上述判断依次为密码一致性判断,用户名不为空判断,密码不为空判断
return true;
return false;
}
}
实际效果
参考的博客
Android判断两次输入密码是否相等并且不为空
Android开发--实现Android登录注册页面（上
Android学习之利用Intent传递数据
