在Android中的有效會話令牌與解析

Question

我正在創建用戶註冊與解析的應用程序。當我填寫編輯字段，按註冊按鈕敬酒的消息顯示，無效的令牌session.I填寫所有filed.How我可以解決這個下面是problem.Here我的代碼

package com.example.home.communicate 

import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Toast; 

import com.parse.ParseException; 
import com.parse.ParseUser; 
import com.parse.SignUpCallback; 

public class SignupActivity extends AppCompatActivity { 
    EditText editusername, editpassword, editemail, editrepassword; 
    Button signup; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_signup); 

    editusername = (EditText) findViewById(R.id.usernamesignup); 
    editemail = (EditText) findViewById(R.id.email); 
    editpassword = (EditText) findViewById(R.id.passwordinsignup); 
    editrepassword = (EditText) findViewById(R.id.re_enterpassword); 
    signup = (Button) findViewById(R.id.signup); 

    signup.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      userSignUp(); 
     } 
    }); 
} 

private void userSignUp() { 
    String username = editusername.getText().toString().trim(); 
    String email = editemail.getText().toString().trim(); 
    String password = editpassword.getText().toString().trim(); 
    String repassword = editrepassword.getText().toString().trim(); 

    boolean validationError = false; 
    StringBuilder validationErrorMessage = new StringBuilder(getString(R.string.error_intro)); 

    if (username.length() == 0) { 
     validationError = true; 
     validationErrorMessage.append(getString(R.string.error_blank_username)); 
    } 

    if (password.length()== 0){ 
     if(validationError){ 
      validationErrorMessage.append(getString(R.string.error_join)); 
     } 
     validationError = true; 
     validationErrorMessage.append(getString(R.string.error_blank_password)); 
    } 
    if(!password.equals(repassword)){ 
     if(validationError){ 
      validationErrorMessage.append(getString(R.string.error_join)); 
     } 
     validationError = true; 
     validationErrorMessage.append(getString(R.string.error_mismatched_passwords)); 

    } 
    if (email.length()== 0){ 
     if(validationError){ 
      validationErrorMessage.append(getString(R.string.error_join)); 
     } 
     validationError = true; 
     validationErrorMessage.append(getString(R.string.error_blank_email)); 
    } 

    if(validationError){ 
     Toast.makeText(SignupActivity.this, validationErrorMessage.toString(),Toast.LENGTH_SHORT).show(); 
    } 

    ParseUser user = new ParseUser(); 
    user.setUsername(username); 
    user.setEmail(email); 
    user.setPassword(password); 
    user.signUpInBackground(new SignUpCallback() { 
     @Override 
     public void done(ParseException e) { 
      if (e==null){ 
       Intent intent = new Intent(SignupActivity.this,MainActivity.class); 
       intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); 
       intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
       startActivity(intent); 
      } 
      else { 
       Toast.makeText(SignupActivity.this,e.getMessage(),Toast.LENGTH_LONG).show(); 
      } 
     } 
    }); 

} 
} 

Answer 1

這可能會在當前的發生用戶沒有完全註銷。在註冊新用戶之前，請務必檢查您當前的用戶並註銷。

ParseUser currentUser = ParseUser.getCurrentUser(); 
if (currentUser != null) { 
    ParseUser.logOut(); 
}