java - 验证类错误

Question

我正在尝试在我的 android studio 项目应用程序中注册用户，但在发送或注册数据之前，我使用“validations.java”类来验证输入，然后继续注册。

这是以下代码: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="";
            }
        }
    }

验证类代码如下:我使用继承从寄存器类中获取参数。

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;
}
}

但是错误是这样的:

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)

请让我知道错误，我认为它与扩展类的错误继承有关。

Answer 1

你可以有这样的东西:

验证类:

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
            }
        }
    }

}

注册类:

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

    }
}

希望对你有帮助!!!