驗證類錯誤

我正在嘗試在我的android studio項目應用程序中註冊一個用戶，但在發送或註冊數據之前，我使用驗證輸入並進行註冊的「validations.java」類。驗證類錯誤

下面是代碼：register.java

 import android.graphics.Color; 
     import android.support.v7.app.AppCompatActivity; 
     import android.os.Bundle; 
     import android.view.Menu; 
     import android.view.MenuItem; 
     import android.view.MotionEvent; 
     import android.view.View; 
     import android.widget.EditText; 
     import android.widget.ProgressBar; 
     import android.widget.Toast; 

     /** 
     * Created by Tanishq on 15-11-2015. 
     */ 

    public class register extends AppCompatActivity { 

     public EditText editname; 
     public EditText editemail; 
     public EditText editmobile; 
     public EditText editpassword; 
     public EditText editrepassword; 

     String error_code=""; 
     boolean flagmob = false; 
     boolean flagemail = false; 
     boolean flagpass = false; 
     private static final String REGISTER_URL = "http://127.0.0.1/class/register.php"; 
     String check=""; 
     @Override 
     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.register); 


      editname = (EditText)findViewById(R.id.name); 
      editemail = (EditText)findViewById(R.id.email); 
      editmobile = (EditText)findViewById(R.id.mobile); 
      editpassword = (EditText)findViewById(R.id.password); 
      editrepassword = (EditText)findViewById(R.id.repassword); 
     } 

     public void onregister(View view) 
     { 

      validations vd = new validations(); 
      int k = vd.validate(); 


      if(k==1) 
      { 
       Toast.makeText(register.this, "Registration Successful", Toast.LENGTH_LONG).show(); 
      } 

      else 
      { 
       int len1 = error_code.length(); 
       for(int i =0; i<-len1; i++) 
       { 
        char c = error_code.charAt(i); 
        if(c=='m') 
        { 
         flagmob=true; 
        } 
        else if(c=='e') 
        { 
         flagemail=true; 
        } 
        else if(c=='p') 
        { 
         flagpass=true; 
        } 
       } 

       if(flagmob=true) 
       { 
        editmobile.setHint("10 DIGIT VALID NUMBER"); 
        editmobile.setText(""); 
        editmobile.setHintTextColor(Color.parseColor("#F44336")); 
       } 

       if(flagemail=true) 
       { 
        editemail.setHint("ENTER VALID EMAIL ID"); 
        editemail.setText(""); 
        editemail.setHintTextColor(Color.parseColor("#F44336")); 
       } 

       if(flagpass=true) 
       { 
        editpassword.setHint("Passwords Don't Match"); 
        editpassword.setText(""); 
        editpassword.setHintTextColor(Color.parseColor("#F44336")); 
        editrepassword.setHint("Passwords Don't Match"); 
        editrepassword.setText(""); 
        editrepassword.setHintTextColor(Color.parseColor("#F44336")); 
       } 

       check = ""; 
       error_code=""; 
      } 
     } 
    }

的驗證類代碼如下：我已經使用繼承來從寄存器類的參數。

import com.classifiedwale.android.register; 
public class validations extends register { 
public int validate() { 
int validation = 1; 
int evalid = 1; 
int mvalid = 1; 
int pvalid = 1; 

     check = editmobile.getText().toString(); 
     if (check.length() > 10) { 
      mvalid = 0; 
      error_code = error_code + "m"; 
     } 

     //Email Validation 
     check = editemail.getText().toString(); 
     char c; 
     int length = check.length(); 
     for (int i = 0; i < length; i++) { 
      c = check.charAt(i); 
      if (c == '@') { 

      } else { 
       error_code = error_code + "e"; 
       evalid = 0; 
      } 
     } 

     check = editpassword.getText().toString(); 
     String check2 = editrepassword.getText().toString(); 
     if (check.equals(check2)) { 
      validation = 1; 
     } else { 
      error_code = error_code + "p"; 
      pvalid = 0; 
     } 


     if (evalid != 0 && mvalid != 0 && pvalid != 0) { 
      validation = 1; 
     } else { 
      validation = 0; 
     } 

     return validation; 
} 
}

錯誤但是出來是這樣的：

11-15 07:12:42.210 19637-19637/com.classifiedwale.android E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    java.lang.IllegalStateException: Could not execute method for android:onClick 
      at android.support.v7.internal.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:278) 
      at android.view.View.performClick(View.java:4204) 
      at android.view.View$PerformClick.run(View.java:17355) 
      at android.os.Handler.handleCallback(Handler.java:725) 
      at android.os.Handler.dispatchMessage(Handler.java:92) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.app.ActivityThread.main(ActivityThread.java:5041) 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:511) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
      at dalvik.system.NativeStart.main(Native Method) 
    Caused by: java.lang.reflect.InvocationTargetException 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:511) 
      at android.support.v7.internal.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:273) 
            at android.view.View.performClick(View.java:4204) 
            at android.view.View$PerformClick.run(View.java:17355) 
            at android.os.Handler.handleCallback(Handler.java:725) 
            at android.os.Handler.dispatchMessage(Handler.java:92) 
            at android.os.Looper.loop(Looper.java:137) 
            at android.app.ActivityThread.main(ActivityThread.java:5041) 
            at java.lang.reflect.Method.invokeNative(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:511) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
            at dalvik.system.NativeStart.main(Native Method) 
    Caused by: java.lang.NullPointerException 
      at com.classifiedwale.android.validations.validate(validations.java:17) 
      at com.classifiedwale.android.register.onregister(register.java:49) 
            at java.lang.reflect.Method.invokeNative(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:511) 
            at android.support.v7.internal.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:273) 
            at android.view.View.performClick(View.java:4204) 
            at android.view.View$PerformClick.run(View.java:17355) 
            at android.os.Handler.handleCallback(Handler.java:725) 
            at android.os.Handler.dispatchMessage(Handler.java:92) 
            at android.os.Looper.loop(Looper.java:137) 
            at android.app.ActivityThread.main(ActivityThread.java:5041) 
            at java.lang.reflect.Method.invokeNative(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:511) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
            at dalvik.system.NativeStart.main(Native Method)

請讓我知道的錯誤，我認爲它一定的相關性擴展類的錯誤繼承。

來源

2015-11-15 Tanishq Sharma

「驗證」類中的哪一行是行號17（引發NPE）？你有沒有調試過你的程序？ –

嗨，我相對較新的android工作室，和android開發 - 所以我沒有調試它，因爲我不知道如何。下面是帶行號的代碼的屏幕截圖：錯誤現在發生在行號13（格式化之後），這是第13行的代碼：http://prntscr.com/92xmyg –

首先，所有類名都應該以大寫字母開頭。 Java區分大小寫 –

你可以有這樣的事情：

驗證類：

public class Validation { 

    public boolean isEmailValid(CharSequence email){ 
     return android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches(); 
    } 

    public void validateMobile(String mobile){ 
     if (mobile != null){ 
      if (mobile.length() > 10){ 
       //do stuff with name 
      } 
     } 
    } 

    public void validatePassword(String password, String retypePassword){ 
     if (password != null && retypePassword != null){ 
      if (password.equals(retypePassword)){ 
       //do stuff with password 
      } 
     } 
    } 

}

註冊類：

public class Register extends AppCompatActivity { 

    public EditText editname; 
    public EditText editemail; 
    public EditText editmobile; 
    public EditText editpassword; 
    public EditText editrepassword; 

    String error_code=""; 
    boolean flagmob = false; 
    boolean flagemail = false; 
    boolean flagpass = false; 
    private static final String REGISTER_URL = "http://127.0.0.1/class/register.php"; 
    String check=""; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.register); 


     editname = (EditText)findViewById(R.id.name); 
     editemail = (EditText)findViewById(R.id.email); 
     editmobile = (EditText)findViewById(R.id.mobile); 
     editpassword = (EditText)findViewById(R.id.password); 
     editrepassword = (EditText)findViewById(R.id.repassword); 
    } 

    public void onregister(View view) { 

     Validation validation = new Validation(); 
     String name = editname.getText().toString(); 
     String email = editemail.getText().toString(); 
     String mobile = editmobile.getText().toString(); 
     String password = editpassword.getText().toString(); 
     String retypePassword = editrepassword.getText().toString(); 

     String validatedMobile = validation.validateMobile(mobile); 
     boolean validatedEmail = validation.isEmailValid(email); 
     String validatedPassword = validation.validatePassword(password, retypePassword); 
     //do stuff with validated data 

    } 
}

希望它可以幫助！

來源

2015-11-15 08:28:18

令人驚歎，陷阱，將嘗試一點。謝謝:) –

沒有problemm我碰到simmilar problemm而前，所以隨時隨地 –

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