Mainactivity.java

package com.jack.valley;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import java.util.HashMap;
import java.util.Map;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private static final String UPDATE_URL = "http://192.168.39.1/volley/update.php";
    private static final String DELETE_URL = "http://192.168.39.1/volley/update.php";

    public static final String KEY_ID = "id";
    public static final String KEY_USERNAME = "username";
    public static final String KEY_PASSWORD = "password";
    public static final String KEY_EMAIL = "email";
    public static final String KEY_KEADAAN = "keadaan";


    private EditText editTextId;
    private EditText editTextUsername;
    private EditText editTextEmail;
    private EditText editTextPassword;
    private RadioGroup radioGroupkeadaan;
    private RadioButton ada;

    private Button buttonRegister;
    private Button buttonDelete;

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

        editTextId = (EditText) findViewById(R.id.editTextId);
        editTextUsername = (EditText) findViewById(R.id.editTextUsername);
        editTextPassword = (EditText) findViewById(R.id.editTextPassword);
        editTextEmail= (EditText) findViewById(R.id.editTextEmail);
        radioGroupkeadaan = (RadioGroup) findViewById(R.id.radioGroupkeadaan);


        buttonRegister = (Button) findViewById(R.id.buttonRegister);

        buttonRegister.setOnClickListener(this);
        buttonDelete.setOnClickListener(this);
    }

    private void updateUser(){
        final String id = editTextId.getText().toString().trim();
        final String username = editTextUsername.getText().toString().trim();
        final String password = editTextPassword.getText().toString().trim();
        final String email = editTextEmail.getText().toString().trim();
        int SelectedId = radioGroupkeadaan.getCheckedRadioButtonId();
        ada = (RadioButton)findViewById(SelectedId);
        final String keadaan = ada.getText().toString().trim();


        StringRequest stringRequest = new StringRequest(Request.Method.POST, UPDATE_URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        Toast.makeText(MainActivity.this,response,Toast.LENGTH_LONG).show();
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(MainActivity.this,error.toString(),Toast.LENGTH_LONG).show();
                    }
                }){
            @Override
            protected Map<String,String> getParams(){
                Map<String,String> params = new HashMap<String, String>();
                params.put(KEY_ID,id);
                params.put(KEY_USERNAME,username);
                params.put(KEY_PASSWORD,password);
                params.put(KEY_EMAIL, email);
                params.put(KEY_KEADAAN, keadaan);
                return params;
            }

        };

        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(stringRequest);
    }

    private void deleteUser(){
        StringRequest deleteRequest = new StringRequest(Request.Method.DELETE, DELETE_URL,
                new Response.Listener<String>()
                {
                    @Override
                    public void onResponse(String response) {
                        // menampilkan response
                        Log.d("Response", response);
                    }
                },
                new Response.ErrorListener()
                {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        // menamoilkan error.
                        Log.d("Error.Response", response);//error disini gan "response"
                    }
                }
        );
        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(deleteRequest);

}

    private void confirmDeleteUser(){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("Are you sure you want to delete this data?");

        builder.setPositiveButton("Yes",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface arg0, int arg1) {
                        deleteUser();
                        startActivity(new Intent(MainActivity.this,ViewAllUser.class));
                    }
                });

        builder.setNegativeButton("No",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface arg0, int arg1) {

                    }
                });

        AlertDialog alertDialog = builder.create();
        alertDialog.show();
    }
    @Override
    public void onClick(View v) {
        if(v == buttonRegister){
            updateUser();
        }

        if(v == buttonDelete){
            confirmDeleteUser();
        }
    }
}