안드로이드 스튜디오 OnClick [closed]

Question

import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.text.InputFilter;
import android.text.Spanned;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.toolbox.Volley;

import org.json.JSONObject;

import java.util.regex.Pattern;
public class RegisterActivity extends AppCompatActivity {
    EditText idText, pswordText, nameText, ageText;
    Button registerButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        idText =(EditText)findViewById(R.id.idText);
        pswordText =(EditText)findViewById(R.id.pswordText);
        nameText =(EditText)findViewById(R.id.nameText);
        ageText =(EditText)findViewById(R.id.ageText);
        idText.setFilters(new InputFilter[] {filter});
        registerButton=(Button)findViewById(R.id.registerbutton);
        registerButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String userID=idText.getText().toString();
                String userPassword=pswordText.getText().toString();
                String userName=nameText.getText().toString();
                int userAge=Integer.parseInt(ageText.getText().toString());
                Response.Listener<String> responseListener=new Response.Listener<String>(){

                    @Override
                    public void onResponse(String response) {
                        try{
                            JSONObject jsonResponse=new JSONObject(response);
                            boolean success=jsonResponse.getBoolean("success");
                            if(success){
                                AlertDialog.Builder builder=new AlertDialog.Builder(RegisterActivity.this);
                                builder.setMessage("회원 등록에 성공했습니다.")
                                        .setPositiveButton("확인", new DialogInterface.OnClickListener() {
                                            @Override
                                            public void onClick(DialogInterface dialog, int which) {
                                                Intent intent=new Intent(RegisterActivity.this, LoginActivity.class);
                                                RegisterActivity.this.startActivity(intent);
                                                finish();
                                            }
                                        })
                                        .create()
                                        .show();
                            }else{
                                AlertDialog.Builder builder=new AlertDialog.Builder(RegisterActivity.this);
                                builder.setMessage("회원 등록에 실패했습니다.")
                                        .setNegativeButton("다시 시도", new DialogInterface.OnClickListener() {
                                            @Override
                                            public void onClick(DialogInterface dialog, int which) {
                                                Intent intent=new Intent(RegisterActivity.this, RegisterActivity.class);
                                                RegisterActivity.this.startActivity(intent);
                                            }
                                        })
                                        .create()
                                        .show();
                            }
                        }catch (Exception e){
                            e.printStackTrace();
                        }
                    }
                };
                RegisterRequest registerRequest=new RegisterRequest(userID, userPassword,
                        userName,userAge, responseListener);
                RequestQueue queue = Volley.newRequestQueue(RegisterActivity.this);
                queue.add(registerRequest);
            }
        });
    }
    protected InputFilter filter= new InputFilter() {
        public CharSequence filter(CharSequence source, int start, int end,
                                   Spanned dest, int dstart, int dend) {
            Pattern ps = Pattern.compile("^[a-zA-Z0-9]+$");
            if (!ps.matcher(source).matches()) {
                return "";
            }
            return null;
        }
    };
    public InputFilter filterKor = new InputFilter() {

        @Override
        public CharSequence filter(CharSequence source, int start, int end,

                                   Spanned dest, int dstart, int dend) {
            Pattern ps = Pattern.compile("^[ㄱ-가-힣]+$");
            if (!ps.matcher(source).matches()) {
                return "";
            }
            return null;
        }

    };
}

여기서 RegisterButton 을 누르는데 왜 액티비티 전환 과 DB에 저장이 안되는지 궁금합니다..