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101 lines
4.2 KiB
101 lines
4.2 KiB
package com.example.myexamproject;
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import androidx.appcompat.app.AppCompatActivity;
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import android.content.Intent;
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import android.content.SharedPreferences;
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import android.os.Bundle;
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import android.text.TextUtils;
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import android.view.View;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.Toast;
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import com.example.myexamproject.utils.MD5Utils;
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public class RegisterActivity extends AppCompatActivity {
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//声明所有按钮
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private EditText et_username,et_pwd,et_pwd_sure;
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private Button register;
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private String userName,passWord,passWord_sure;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_register);
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init();
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}
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public void init(){
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//给按钮匹配id
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et_username = (EditText)findViewById(R.id.username);
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et_pwd = (EditText)findViewById(R.id.pwd);
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et_pwd_sure = (EditText)findViewById(R.id.pwd2);
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register = (Button)findViewById(R.id.registerBtn);
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register.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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getEditString();
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//提示输入信息
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if(TextUtils.isEmpty(userName)){
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Toast.makeText(RegisterActivity.this, "请输入用户名", Toast.LENGTH_SHORT).show();
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return;
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}else if(TextUtils.isEmpty(passWord)){
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Toast.makeText(RegisterActivity.this, "请输入密码", Toast.LENGTH_SHORT).show();
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return;
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}else if(TextUtils.isEmpty(passWord_sure)){
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Toast.makeText(RegisterActivity.this, "请再次输入密码", Toast.LENGTH_SHORT).show();
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return;
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}else if(!passWord.equals(passWord_sure)){
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Toast.makeText(RegisterActivity.this, "输入两次的密码不一样", Toast.LENGTH_SHORT).show();
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return;
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//判断用户名是否已被注册
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}else if(isExistUserName(userName)){
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Toast.makeText(RegisterActivity.this, "此账户名已经存在", Toast.LENGTH_SHORT).show();
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return;
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}else{
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Toast.makeText(RegisterActivity.this, "注册成功", Toast.LENGTH_SHORT).show();
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//把保存账号密码
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saveRegisterInfo(userName, passWord);
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Intent data = new Intent();
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data.putExtra("userName", userName);
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setResult(RESULT_OK, data);
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//跳转到登录界面中
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Intent intent = new Intent(RegisterActivity.this,LoginActivity.class);
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startActivity(intent);
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RegisterActivity.this.finish();
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}
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}
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});
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}
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//获得已输入信息
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private void getEditString(){
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userName = et_username.getText().toString().trim();
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passWord = et_pwd.getText().toString().trim();
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passWord_sure = et_pwd_sure.getText().toString().trim();
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}
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//判断输入的用户名是否已经存在
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private boolean isExistUserName(String userName){
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boolean has_userName = false;
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SharedPreferences sp = getSharedPreferences("loginInfo", MODE_PRIVATE);
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String spPsw = sp.getString(userName, "");
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//判断密码是否为空，不空则注册成功
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if(!TextUtils.isEmpty(spPsw)) {
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has_userName=true;
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}
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return has_userName;
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}
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//将用户名和密码保存到sp中
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private void saveRegisterInfo(String userName,String psw){
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String md5Psw = MD5Utils.md5(psw);//把密码用MD5加密
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SharedPreferences sp = getSharedPreferences("loginInfo", MODE_PRIVATE);
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SharedPreferences.Editor editor = sp.edit();
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editor.putString(userName, md5Psw);
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editor.commit();
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}
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//跳转回登录界面
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public void onBackPressed() {
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Intent intent = new Intent();
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intent.setClass(RegisterActivity.this,LoginActivity.class);
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startActivity(intent);
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RegisterActivity.this.finish();
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}
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} |