本文共 3626 字，大约阅读时间需要 12 分钟。

运行样式

一、界面布局

1、界面样子：

2、在activity_main.xml当中创建布局界面

3、源代码

二、Java源代码

package com.example.application22;import androidx.appcompat.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.EditText;import android.widget.Toast;import java.util.regex.Matcher;import java.util.regex.Pattern;public class MainActivity extends AppCompatActivity {
       EditText name = null;    EditText password = null;    EditText email = null;    EditText phone = null;    @Override    protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        name = findViewById(R.id.name);        password = findViewById(R.id.password);        email = findViewById(R.id.email);        phone = findViewById(R.id.phone);    }    public void register(View v){
          String namestring = name.getText().toString();       String passwordstring = password.getText().toString();       String emailstring = email.getText().toString();       String phonestring = phone.getText().toString();        //判断账号        if(namestring.length() == 0  ){
              Toast.makeText(getApplicationContext(),"账号不能为空",Toast.LENGTH_SHORT).show();           return;        }        if(namestring.length() > 16  ){
               Toast.makeText(getApplicationContext(),"账号必须小于16位",Toast.LENGTH_SHORT).show();            return;        }        if(namestring.length() != 0 && namestring.length() < 8  ){
               Toast.makeText(getApplicationContext(),"账号必须大于8位",Toast.LENGTH_SHORT).show();            return;        }        //判断密码        if(passwordstring.length() == 0 ){
               Toast.makeText(getApplicationContext(),"密码不能为空",Toast.LENGTH_SHORT).show();            return;        }        if(passwordstring.length() > 16  ){
               Toast.makeText(getApplicationContext(),"密码必须小于16位",Toast.LENGTH_SHORT).show();            return;        }        if(passwordstring.length() != 0 && passwordstring.length() < 8  ){
               Toast.makeText(getApplicationContext(),"密码必须大于8位",Toast.LENGTH_SHORT).show();            return;        }        //判断邮箱        if(emailstring.length() == 0 ){
               Toast.makeText(getApplicationContext(),"邮箱不能为空",Toast.LENGTH_SHORT).show();            return;        }        String regEx1 = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";        Pattern p;        Matcher m;        p = Pattern.compile(regEx1);        m = p.matcher(emailstring);        if (!m.matches()){
               Toast.makeText(getApplicationContext(),"邮箱格式不正确",Toast.LENGTH_SHORT).show();            return;        }        //判断电话        if(phonestring.length() == 0 ){
               Toast.makeText(getApplicationContext(),"电话不能为空",Toast.LENGTH_SHORT).show();            return;        }        Pattern p1 = Pattern.compile("^1[3,5,7,8,9][0-9]{9}$");        Matcher m1 = p1.matcher(phonestring);        if(!m1.matches()){
               Toast.makeText(getApplicationContext(),"电话格式不正确",Toast.LENGTH_SHORT).show();            return;        }        Toast.makeText(getApplicationContext(),"注册成功请登录",Toast.LENGTH_SHORT).show();    }    public void reset(View v){
           name.setText("");        password.setText("");        email.setText("");        phone.setText("");    }}

转载地址：https://code100.blog.csdn.net/article/details/115282164 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！