RegisterActivity.java

package zcode.learn.loginandregistration;

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

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

import org.json.JSONException;
import org.json.JSONObject;

public class RegisterActivity extends AppCompatActivity {

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

        /*final EditText etFirstnm = (EditText) findViewById(R.id.etFirstnm);
        final EditText etLastnm = (EditText) findViewById(R.id.etLastnm);
        final EditText etEmail = (EditText) findViewById(R.id.etEmail);*/

        final EditText etName = (EditText) findViewById(R.id.etName);
        final EditText etAge = (EditText) findViewById(R.id.etAge);
        final EditText etUsernm = (EditText) findViewById(R.id.etUsernm);
        final EditText etPasswd = (EditText) findViewById(R.id.etPasswd);
        final Button bRegister = (Button) findViewById(R.id.bRegister);

        assert bRegister != null;
        bRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String name = etName.getText().toString();
                final int age = Integer.parseInt(etAge.getText().toString());
                final String usernm = etUsernm.getText().toString();
                final String passwd = etPasswd.getText().toString();


                Response.Listener<String> responseListener = new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        try {
                            JSONObject jsonResponse = new JSONObject(response);
                            boolean state = jsonResponse.getBoolean("success");

                            if (state) {
                                Intent intent = new Intent(RegisterActivity.this, LoginActivity.class);
                                RegisterActivity.this.startActivity(intent);
                            } else {
                                AlertDialog.Builder builder = new AlertDialog.Builder(RegisterActivity.this);
                                builder.setMessage("Register Failed")
                                        .setNegativeButton("Retry", null)
                                        .create()
                                        .show();
                            }
                        } catch (JSONException errorText) {
                            errorText.printStackTrace();
                        }

                    }
                };


                RegisterRequest registerRequest = new RegisterRequest(name, age, usernm, passwd, responseListener);
                RequestQueue requestQueue = Volley.newRequestQueue(RegisterActivity.this);
                requestQueue.add(registerRequest);
            }
        });
    }
}