Password validation confirmation in android

Question

I have this activity in which I want to validate the confirm password field.This is my code-:

nt.setOnClickListener(new OnClickListener() { 

    public void onClick(View v) { 

         if(email.getText().toString().equals("")){
            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("E-mail field is empty");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });
            alertDialog.show();
        }
        else if(pass.getText().toString().equals("")){

            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("Password  field is empty");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });

            alertDialog.show();
        }

        else if(conpass.getText().toString()!= pass.getText().toString() ){
            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("Passwords do not match");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });
            alertDialog.show();
        }
        else if(name.getText().toString().equals("")){
            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("Name field is empty");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });
            alertDialog.show();
        }
        else if(dob.getText().toString().equals("")){
            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("Date of birth field is empty");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });
            alertDialog.show();
        }
        else if(address.getText().toString().equals("")){
            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("Address field is empty");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });
            alertDialog.show();
        }
        else if(city.getText().toString().equals("")){
            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("City field is empty");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });
            alertDialog.show();
        }
        else if(zip.getText().toString().equals("")){
            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("Zip field is empty");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });
            alertDialog.show();
        }
        else if(phone.getText().toString().equals("")){
            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("Phone No. field is empty");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });
            alertDialog.show();
        }
        else if(mobile.getText().toString().equals("")){
            AlertDialog alertDialog = new AlertDialog.Builder(Registration.this).create();
            alertDialog.setTitle("oops!");
            alertDialog.setMessage("Mobile No field is empty");
            alertDialog.setButton("Ok",
            new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                      //dismiss the dialog  
                    }
                });
            alertDialog.show();
        }

        else{

            String mail = email.getText().toString();

            String pas = pass.getText().toString();

            String fname = name.getText().toString();

            String dateob = dob.getText().toString();

            String add12 = address.getText().toString();

            String tow = city.getText().toString();

            String zip1 = zip.getText().toString();

            String mob = mobile.getText().toString();

            String phn = phone.getText().toString();

            Intent per = new Intent(getApplicationContext(), Register2.class);
            per.putExtra("email", mail);
            per.putExtra("name", fname);
            per.putExtra("password", pas);
            per.putExtra("mobile", mob);
            per.putExtra("phone", phn);
            per.putExtra("address", add12);
            per.putExtra("zip", zip1);
            per.putExtra("city", tow);
            per.putExtra("dateofbirth", dateob);
            startActivity(per);
        }

    }
});  

Now even after I have both of the edittext field to be same it is still showing me the alert dialog that passwords do not match.Please help me out here.Thanks in advance.

Answer 1

You cannot compare strings using = or !=, use equals instead

else if(!conpass.getText().toString().equals(pass.getText().toString()) )

Answer 2

Try this function:

public boolean isPasswordMatching(String password, String confirmPassword) {
    Pattern pattern = Pattern.compile(password, Pattern.CASE_INSENSITIVE);
    Matcher matcher = pattern.matcher(confirmPassword);

    if (!matcher.matches()) {
        // do your Toast("passwords are not matching");

        return false;
    }

    return true;
}