如何在 activity 中访问字符串数组以进行用户名身份验证？

Question

我想创建一个 android 工作室登录页面，使用数组列表中存储的多个帐户。如何验证写入的用户名和密码是否与arraylist中存储的用户名和密码相同

这是我在 res 中的数组列表：

<string-array name="user">
    <item>admin</item>
    <item>jhon</item>
</string-array>

<string-array name="pass">
    <item>admin</item>
    <item>littlejhon</item>
</string-array>

这是我的 activity 代码：

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.CardView;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;    
import java.util.HashMap;
import java.util.Objects;

public class PassActivity extends AppCompatActivity {
    EditText username;
    EditText password;
    CardView card;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pass);

        final String[] use = getResources().getStringArray(R.array.user);
        final String[] pas = getResources().getStringArray(R.array.pass);

        username = findViewById(R.id.username);
        password = findViewById(R.id.password);
        card     = findViewById(R.id.card);

        card.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (Objects.equals(username.getText().toString(), use)
                    &&
                    Objects.equals(password.getText().toString(),pas))
                {
                    Toast.makeText(
                        PassActivity.this,
                        "You have Authenticated Successfully",
                        Toast.LENGTH_LONG)
                    .show();
                }
                else {
                    Toast.makeText(
                        PassActivity.this,
                        "Authentication Failed",
                        Toast.LENGTH_LONG)
                    .show();
                }
            }
        });
    }
}

感谢您帮助我，希望有人对此有一些经验。谢谢..

Answer 1

检查数组中的每一对：

 public void onClick(View view) {
    boolean found = false;
    String myUsername = username.getText().toString();
    String myPassword = password.getText().toString();

    for (int i = 0; i < use.length; i++) {
      if (use[i].equals(myUsername) && pas[i].equals(myPassword)) {
             Toast.makeText(PassActivity.this,"You have Authenticated Successfully",Toast.LENGTH_LONG).show();
           found = true;
           break;
      }
     }

     if (!found) {
          Toast.makeText(PassActivity.this,"Authentication Failed",Toast.LENGTH_LONG).show();
      }
  }

Answer 2

试试这个：

String[] usernames = getStringArray(R.array.usernames);
EditText editText = (EditText)findViewById(R.id.edittext);
String candidate = editText.getText().toString();
boolean submit_authenticate = isAuthenticated(candidate, usernames);

if(submit_authenticate){
    Toast.makeText(PassActivity.this,"You have Authenticated Successfully",Toast.LENGTH_LONG).show();
}else{
    Toast.makeText(PassActivity.this,"Authentication Failed",Toast.LENGTH_LONG).show();
}

public boolean isAuthenticated(String candidate, String[] usernames) {
   for(String username : usernames) {
      if(candidate.equals(username)) {
        return true;
      } 
   }
   return false;
}

Answer 3

试试下面的代码，

 public void onClick(View view) {

  final String[] UserArray= getResources().getStringArray(R.array.user);
  final String[] passArray= getResources().getStringArray(R.array.pas);

  String Username = username.getText().toString();
  String Password = password.getText().toString();

  if (Arrays.asList(UserArray).contains(Username) && Arrays.asList(passArray).contains(Password )) {
    // authenticate successfully
  }else{
     // authentication failed
   }

}

如何在 activity 中访问字符串数组以进行用户名身份验证？

How to access a String-array for username authentification in an activity?

java

arrays

android

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