Crud Android Studio Mysql
Tutorial Crud Rest Api Menggunakan Retrofit 2 Android
Membuat Aplikasi Android CRUD Menggunakan Database MySQL
MySQL adalah sebuah perangkat lunak sistem manajemen basis data SQL, atau DBMS yang multithread dan multi-user. MySQL adalah Relational Database Management System (RDBMS) yang berada dibawah lisensi GPL (General Public License). MySQL, sebenarnya merupakan turunan dari SQL. SQL (Structured Query Language) adalah sebuah konsep pengoperasian database, terutama untuk pemilihan atau seleksi dan pemasukan data, yang memungkinkan pengoperasian data dikerjakan dengan mudah secara otomatis. CRUD (Create Read Update Delete) adalah sebuah sebuatan untuk aplikasi dimana pengguna dapat menambah, mengedit dan menghapus data. Aplkasi ini menggunakan floating action button untuk memanggil form biodata untuk menambah atau mengedit data. Semua data akan ditampilkan pada listview. Untuk mengedit atau menghapus data pengguna harus menekan lama salah satu data pada listview untuk menampilkan action edit atau delete.
Langsung saja pertama membuat database dengan nama kuncoro_crud dengan nama tabel biodata dan struktur tabelnya seperti berikut :
Membuat web service untuk parsing data aplikasi android.
koneksi.php
Sebagai koneksi aplikasi ke database. Coding-nya disini.select.php Untuk menampilkan semua data biodata. Coding-nya disini.
insert.php Untuk menambah data biodata ke database. Coding-nya disini.
edit.php Untuk mengambil salah satu data biodata dari database sebagai parameter meng-update. Coding-nya disini.
update.php Untuk meng-update data biodata. Coding-nya disini.
delete.php Untuk menghapus data biodata. Coding-nya disini.
Buat project baru di Android Studio File ⇒ New Project. Kemudian pilih Blank Activity dan melanjutkannya hingga selesai.
activity_main.xml Tampilan untuk container floating action button.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.dedykuncoro.kuncorocrud.MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
android:src="@android:drawable/ic_input_add" />
</android.support.design.widget.CoordinatorLayout>
content_main.xml Sebagai tampilan dari data-data pada listview.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.dedykuncoro.kuncorocrud.MainActivity"
tools:showIn="@layout/activity_main">
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ListView
android:id="@+id/list"
android:divider="@color/list_divider"
android:dividerHeight="2dp"
android:listSelector="@drawable/list_row_selector"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>
list_row.xml Sebagai tampilan custom listview yang berisi nama dan alamat.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:padding="16dp"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"/>
<TextView
android:id="@+id/nama"
android:layout_marginBottom="5dp"
android:textStyle="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/alamat"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
form_biodata.xml Tampilan untuk mengisi biodata.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin" >
<EditText
android:id="@+id/txt_id"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:drawable/editbox_background_normal"/>
<EditText
android:id="@+id/txt_nama"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:hint="Nama"
android:singleLine="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:drawable/editbox_background_normal"/>
<EditText
android:id="@+id/txt_alamat"
android:layout_marginBottom="10dp"
android:hint="Alamat"
android:inputType="textMultiLine"
android:minLines="3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:drawable/editbox_background_normal"/>
</LinearLayout>
Buat folder drawable didalam res dan isi file baru dengan nama list_row_bg.xml, list_row_bg_hover.xml, dan list_row_selector.xml sebagai style listview. list_row_bg.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:startColor="@color/list_row_start_color"
android:endColor="@color/list_row_end_color"
android:angle="270" />
</shape>
list_row_bg_hover.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<gradient
android:angle="270"
android:endColor="@color/list_row_hover_end_color"
android:startColor="@color/list_row_hover_start_color" />
</shape>
list_row_selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/list_row_bg" android:state_pressed="false" android:state_selected="false"/>
<item android:drawable="@drawable/list_row_bg_hover" android:state_pressed="true"/>
<item android:drawable="@drawable/list_row_bg_hover" android:state_pressed="false" android:state_selected="true"/>
</selector>
Masuk folder res=>values=>color.xml dan tambahkan code seperti berikut : color.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#3F51B5</color>
<color name="colorPrimaryDark">#303F9F</color>
<color name="colorAccent">#FF4081</color>
<color name="list_divider">#d9d9d9</color>
<color name="list_row_start_color">#ffffff</color>
<color name="list_row_end_color">#ffffff</color>
<color name="list_row_hover_start_color">#ebeef0</color>
<color name="list_row_hover_end_color">#ebeef0</color>
</resources>
Buka build.gradle dan tambahkan volley library didalamnya.
compile 'com.mcxiaoke.volley:library-aar:1.0.0'
build.gradle
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.2.1'
compile 'com.android.support:design:23.2.1'
compile 'com.mcxiaoke.volley:library-aar:1.0.0' /*tambahan volley library*/
}
Agar project terstruktur dan terorganisir, buat 4 paket dengan nama adapter, app, data, dan util. Untuk membuat paket baru , klik kanan pada src=>New=>Peckage dan memberikan nama paket . Contoh : com.dedykuncoro.kuncorocrud.
Buat class AppController.java didalam package app dan tambah coding seperti dibawah ini. Class tunggal yang menginisialisasi class global yang diperlukan. Semua objek yang berhubungan dengan volley diinisialisasi di sini. AppController.java
package com.dedykuncoro.kuncorocrud.app;
import android.app.Application;
import android.text.TextUtils;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;
/**
* Created by Kuncoro on 26/03/2016.
*/
public class AppController extends Application {
public static final String TAG = AppController.class.getSimpleName();
private RequestQueue mRequestQueue;
private static AppController mInstance;
@Override
public void onCreate() {
super.onCreate();
mInstance = this;
}
public static synchronized AppController getInstance() {
return mInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
mRequestQueue = Volley.newRequestQueue(getApplicationContext());
}
return mRequestQueue;
}
public <T> void addToRequestQueue(Request<T> req, String tag) {
req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
getRequestQueue().add(req);
}
public <T> void addToRequestQueue(Request<T> req) {
req.setTag(TAG);
getRequestQueue().add(req);
}
public void cancelPendingRequests(Object tag) {
if (mRequestQueue != null) {
mRequestQueue.cancelAll(tag);
}
}
}
Buat class Data.java didalam package data dan tambahkan coding seperti dibawah ini. Class ini berfungsi sebagai membuat objek untuk setiap item yang diparsing JSON. Objek ini berisi informasi seperti id, nama, dan alamat. Data.java
package com.dedykuncoro.kuncorocrud.data;
/**
* Created by Kuncoro on 26/03/2016.
*/
public class Data {
private String id, nama, alamat;
public Data() {
}
public Data(String id, String nama, String alamat) {
this.id = id;
this.nama = nama;
this.alamat = alamat;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getNama() {
return nama;
}
public void setNama(String nama) {
this.nama = nama;
}
public String getAlamat() {
return alamat;
}
public void setAlamat(String alamat) {
this.alamat = alamat;
}
}
Buat class Adapter.java didalam package adapter dan tambahkan coding seperti dibawah ini. Class ini berfungsi sebagai menampilkan data seperti id, nama, dan alamat kemudian ditampilkan ke dalam listview. Adapter.java
package com.dedykuncoro.kuncorocrud.adapter;
import android.app.Activity;
import android.content.Context;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import com.dedykuncoro.kuncorocrud.R;
import com.dedykuncoro.kuncorocrud.app.AppController;
import com.dedykuncoro.kuncorocrud.data.Data;
import java.util.List;
/**
* Created by Kuncoro on 26/03/2016.
*/
public class Adapter extends BaseAdapter {
private Activity activity;
private LayoutInflater inflater;
private List<Data> items;
public Adapter(Activity activity, List<Data> items) {
this.activity = activity;
this.items = items;
}
@Override
public int getCount() {
return items.size();
}
@Override
public Object getItem(int location) {
return items.get(location);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (inflater == null)
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.list_row, null);
TextView id = (TextView) convertView.findViewById(R.id.id);
TextView nama = (TextView) convertView.findViewById(R.id.nama);
TextView alamat = (TextView) convertView.findViewById(R.id.alamat);
Data data = items.get(position);
id.setText(data.getId());
nama.setText(data.getNama());
alamat.setText(data.getAlamat());
return convertView;
}
}
Buat class Server.java didalam package util dan tambahkan coding seperti dibawah ini. Class ini berfungsi mengatur link server sumber data dari web service yang akan digunakan. Server.java
package com.dedykuncoro.kuncorocrud.util;
/**
* Created by Kuncoro on 26/03/2016.
*/
public class Server {
/* 10.0.2.2 adalah IP Address localhost EMULATOR ANDROID STUDIO,
Ganti IP Address tersebut dengan IP Laptop Apabila di RUN di HP. HP dan Laptop harus 1 jaringan */
public static final String URL = "http://192.168.43.173/android/kuncoro_crud/";
}
Buka class MainActivity.java dan tambahkan coding seperti dibawah ini. Class ini berfungsi menampilkan data biodata dalam listview dari web service volley JsonArrayRequest. Setelah diparsing, semua data JSON Array akan disimpan pada objek Data. Terakhir memanggil notifyDataSetChanged() untuk perubahan data pada Adapter. Fungsi insert, update, delete, select, dan menampilkan form biodata juga ada didalam class ini. MainActivity.java
package com.dedykuncoro.kuncorocrud;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.VolleyLog;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.StringRequest;
import com.dedykuncoro.kuncorocrud.adapter.Adapter;
import com.dedykuncoro.kuncorocrud.app.AppController;
import com.dedykuncoro.kuncorocrud.data.Data;
import com.dedykuncoro.kuncorocrud.util.Server;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class MainActivity extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener {
Toolbar toolbar;
FloatingActionButton fab;
ListView list;
SwipeRefreshLayout swipe;
List<Data> itemList = new ArrayList<Data>();
Adapter adapter;
int success;
AlertDialog.Builder dialog;
LayoutInflater inflater;
View dialogView;
EditText txt_id, txt_nama, txt_alamat;
String id, nama, alamat;
private static final String TAG = MainActivity.class.getSimpleName();
private static String url_select = Server.URL + "select.php";
private static String url_insert = Server.URL + "insert.php";
private static String url_edit = Server.URL + "edit.php";
private static String url_update = Server.URL + "update.php";
private static String url_delete = Server.URL + "delete.php";
public static final String TAG_ID = "id";
public static final String TAG_NAMA = "nama";
public static final String TAG_ALAMAT = "alamat";
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
String tag_json_obj = "json_obj_req";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// menghubungkan variablel pada layout dan pada java
fab = (FloatingActionButton) findViewById(R.id.fab_add);
swipe = (SwipeRefreshLayout) findViewById(R.id.swipe_refresh_layout);
list = (ListView) findViewById(R.id.list);
// untuk mengisi data dari JSON ke dalam adapter
adapter = new Adapter(MainActivity.this, itemList);
list.setAdapter(adapter);
// menamilkan widget refresh
swipe.setOnRefreshListener(this);
swipe.post(new Runnable() {
@Override
public void run() {
swipe.setRefreshing(true);
itemList.clear();
adapter.notifyDataSetChanged();
callVolley();
}
}
);
// fungsi floating action button memanggil form biodata
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
DialogForm("", "", "", "SIMPAN");
}
});
// listview ditekan lama akan menampilkan dua pilihan edit atau delete data
list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(final AdapterView<?> parent, View view,
final int position, long id) {
// TODO Auto-generated method stub
final String idx = itemList.get(position).getId();
final CharSequence[] dialogitem = {"Edit", "Delete"};
dialog = new AlertDialog.Builder(MainActivity.this);
dialog.setCancelable(true);
dialog.setItems(dialogitem, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
switch (which) {
case 0:
edit(idx);
break;
case 1:
delete(idx);
break;
}
}
}).show();
return false;
}
});
}
@Override
public void onRefresh() {
itemList.clear();
adapter.notifyDataSetChanged();
callVolley();
}
// untuk mengosongi edittext pada form
private void kosong(){
txt_id.setText(null);
txt_nama.setText(null);
txt_alamat.setText(null);
}
// untuk menampilkan dialog from biodata
private void DialogForm(String idx, String namax, String alamatx, String button) {
dialog = new AlertDialog.Builder(MainActivity.this);
inflater = getLayoutInflater();
dialogView = inflater.inflate(R.layout.form_biodata, null);
dialog.setView(dialogView);
dialog.setCancelable(true);
dialog.setIcon(R.mipmap.ic_launcher);
dialog.setTitle("Form Biodata");
txt_id = (EditText) dialogView.findViewById(R.id.txt_id);
txt_nama = (EditText) dialogView.findViewById(R.id.txt_nama);
txt_alamat = (EditText) dialogView.findViewById(R.id.txt_alamat);
if (!idx.isEmpty()){
txt_id.setText(idx);
txt_nama.setText(namax);
txt_alamat.setText(alamatx);
} else {
kosong();
}
dialog.setPositiveButton(button, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
id = txt_id.getText().toString();
nama = txt_nama.getText().toString();
alamat = txt_alamat.getText().toString();
simpan_update();
dialog.dismiss();
}
});
dialog.setNegativeButton("BATAL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
kosong();
}
});
dialog.show();
}
// untuk menampilkan semua data pada listview
private void callVolley(){
itemList.clear();
adapter.notifyDataSetChanged();
swipe.setRefreshing(true);
// membuat request JSON
JsonArrayRequest jArr = new JsonArrayRequest(url_select, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Data item = new Data();
item.setId(obj.getString(TAG_ID));
item.setNama(obj.getString(TAG_NAMA));
item.setAlamat(obj.getString(TAG_ALAMAT));
// menambah item ke array
itemList.add(item);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifikasi adanya perubahan data pada adapter
adapter.notifyDataSetChanged();
swipe.setRefreshing(false);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
swipe.setRefreshing(false);
}
});
// menambah request ke request queue
AppController.getInstance().addToRequestQueue(jArr);
}
// fungsi untuk menyimpan atau update
private void simpan_update() {
String url;
// jika id kosong maka simpan, jika id ada nilainya maka update
if (id.isEmpty()){
url = url_insert;
} else {
url = url_update;
}
StringRequest strReq = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Response: " + response.toString());
try {
JSONObject jObj = new JSONObject(response);
success = jObj.getInt(TAG_SUCCESS);
// Cek error node pada json
if (success == 1) {
Log.d("Add/update", jObj.toString());
callVolley();
kosong();
Toast.makeText(MainActivity.this, jObj.getString(TAG_MESSAGE), Toast.LENGTH_LONG).show();
adapter.notifyDataSetChanged();
} else {
Toast.makeText(MainActivity.this, jObj.getString(TAG_MESSAGE), Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Error: " + error.getMessage());
Toast.makeText(MainActivity.this, error.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
// Posting parameters ke post url
Map<String, String> params = new HashMap<String, String>();
// jika id kosong maka simpan, jika id ada nilainya maka update
if (id.isEmpty()){
params.put("nama", nama);
params.put("alamat", alamat);
} else {
params.put("id", id);
params.put("nama", nama);
params.put("alamat", alamat);
}
return params;
}
};
AppController.getInstance().addToRequestQueue(strReq, tag_json_obj);
}
// fungsi untuk get edit data
private void edit(final String idx){
StringRequest strReq = new StringRequest(Request.Method.POST, url_edit, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Response: " + response.toString());
try {
JSONObject jObj = new JSONObject(response);
success = jObj.getInt(TAG_SUCCESS);
// Cek error node pada json
if (success == 1) {
Log.d("get edit data", jObj.toString());
String idx = jObj.getString(TAG_ID);
String namax = jObj.getString(TAG_NAMA);
String alamatx = jObj.getString(TAG_ALAMAT);
DialogForm(idx, namax, alamatx, "UPDATE");
adapter.notifyDataSetChanged();
} else {
Toast.makeText(MainActivity.this, jObj.getString(TAG_MESSAGE), Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Error: " + error.getMessage());
Toast.makeText(MainActivity.this, error.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
// Posting parameters ke post url
Map<String, String> params = new HashMap<String, String>();
params.put("id", idx);
return params;
}
};
AppController.getInstance().addToRequestQueue(strReq, tag_json_obj);
}
// fungsi untuk menghapus
private void delete(final String idx){
StringRequest strReq = new StringRequest(Request.Method.POST, url_delete, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Response: " + response.toString());
try {
JSONObject jObj = new JSONObject(response);
success = jObj.getInt(TAG_SUCCESS);
// Cek error node pada json
if (success == 1) {
Log.d("delete", jObj.toString());
callVolley();
Toast.makeText(MainActivity.this, jObj.getString(TAG_MESSAGE), Toast.LENGTH_LONG).show();
adapter.notifyDataSetChanged();
} else {
Toast.makeText(MainActivity.this, jObj.getString(TAG_MESSAGE), Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Error: " + error.getMessage());
Toast.makeText(MainActivity.this, error.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
// Posting parameters ke post url
Map<String, String> params = new HashMap<String, String>();
params.put("id", idx);
return params;
}
};
AppController.getInstance().addToRequestQueue(strReq, tag_json_obj);
}
}
Tambahkan perijinan INTERNET, ACCESS_NETWORK_STATE, android:name=”.app.AppController” pada application. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.dedykuncoro.kuncorocrud">
<uses-permission android:name="android.permission.INTERNET" /> <!-- tambahan -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <!-- tambahan -->
<application
android:name=".app.AppController" <!-- tambahan -->
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
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