Membuat Aplikasi Android CRUD (Create Read Update Delete) Database SQLite

Selamat siang, siang ini perut lapar belum makan, teringat tadi malam makan roti canai makin lapar saja perut ni. Pada hari ini saya akan membagikan tutorial membuat aplikasi crud sederhana menggunakan database sqlite. tentukan anda yang masih pemula belum tahu bagaimana cara membuat aplikasi crud tersebut. Ayo kita ikuti cara-cara dibawah ini yang telah saya sajikan.
Pertama-tama dan yang paling utama buatlah project baru dengan nama terserah anda dan nama package com.example.dbs. Kemudian pada folder res/layout buat file xml baru seperti dibawah ini.
add_update_screen.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/wall"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/alamattext"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/namatext"
        android:layout_below="@+id/alamat"
        android:layout_marginTop="29dp"
        android:text="JENIS KELAMIN"
        android:textColor="#ff0000"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/textnim1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/nim"
        android:layout_alignBottom="@+id/nim"
        android:layout_alignParentLeft="true"
        android:text="NPM"
        android:textColor="#ff0000"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/nimtext"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textnim1"
        android:layout_below="@+id/nim"
        android:layout_marginTop="14dp"
        android:text="NAMA"
        android:textColor="#ff0000"
        android:textStyle="bold" />

    <EditText
        android:id="@+id/alamat"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/namatext"
        android:layout_alignBottom="@+id/namatext"
        android:layout_alignRight="@+id/nama"
        android:layout_toRightOf="@+id/alamattext"
        android:ems="10"
        android:hint="Alamat"
        android:inputType="textPersonName"
        android:textColor="#000000"
        android:textColorHint="#ffffff" />

    <TextView
        android:id="@+id/namatext"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/nimtext"
        android:layout_below="@+id/nama"
        android:layout_marginTop="28dp"
        android:text="ALAMAT"
        android:textColor="#ff0000"
        android:textStyle="bold" />

    <RadioGroup
        android:id="@+id/sexsex"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/alamat"
        android:layout_alignTop="@+id/alamattext"
        android:layout_toRightOf="@+id/alamattext" >

        <RadioButton
            android:id="@+id/radio0"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="Laki-laki"
            android:textColor="#000000" />

        <RadioButton
            android:id="@+id/radio1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Perempuan"
            android:textColor="#000000" />

    </RadioGroup>

    <EditText
        android:id="@+id/nim"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/nama"
        android:layout_alignParentTop="true"
        android:layout_marginTop="20dp"
        android:ems="10"
        android:hint="Nim"
        android:inputType="textPersonName"
        android:maxLength="13"
        android:textColor="#000000"
        android:textColorHint="#ffffff" >


        <requestFocus />
        
    </EditText>

    <EditText
        android:id="@+id/nama"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/nimtext"
        android:layout_alignBottom="@+id/nimtext"
        android:layout_toRightOf="@+id/alamattext"
        android:ems="10"
        android:hint="Nama"
        android:inputType="textPersonName"
        android:textColor="#000000"
        android:textColorHint="#ffffff" />

    <Spinner
        android:id="@+id/agama"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/sexsex"
        android:layout_alignRight="@+id/sexsex"
        android:layout_below="@+id/sexsex"
        android:layout_marginTop="15dp"
        android:entries="@array/agama" />

    <Button
        android:id="@+id/tampill"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/simpann"
        android:layout_alignRight="@+id/agama"
        android:layout_alignTop="@+id/button1"
        android:background="#000000"
        android:text="Show"
        android:textColor="#ffffff"
        android:textColorLink="#0000ff" />

    <Button
        android:id="@+id/simpann"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView5"
        android:layout_alignParentBottom="true"
        android:layout_toLeftOf="@+id/nim"
        android:background="#000000"
        android:text="Simpan"
        android:textColor="#ffffff"
        android:textColorLink="#0000ff" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/simpann"
        android:layout_alignLeft="@+id/agama"
        android:layout_alignTop="@+id/simpann"
        android:layout_marginLeft="18dp"
        android:background="#000000"
        android:text="Reset"
        android:textColor="#ffffff" />

    <TextView
        android:id="@+id/textView5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/alamattext"
        android:layout_alignTop="@+id/agama"
        android:text="AGAMA"
        android:textColor="#ff0000"
        android:textStyle="bold" />

</RelativeLayout>

listview_row.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/user_name_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:visibility="gone" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/www"
        android:orientation="horizontal" >

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/npm_txt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text=""
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="#0000ff" />

            <TextView
                android:id="@+id/nama_txt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text=""
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:textColor="#ffff00" />

            <TextView
                android:id="@+id/alamat_txt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text=""
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:textColor="#ff0000" />

            <TextView
                android:id="@+id/kelamin_txt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00ff00" />

            <TextView
                android:id="@+id/agama_txt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#996600" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="right"
            android:orientation="horizontal" >

            <Button
                android:id="@+id/btn_update"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="5dp"
                android:background="@drawable/write2"
                android:focusable="false"
                android:focusableInTouchMode="false"
                android:minHeight="50dip"
                android:minWidth="50dip" />

            <Button
                android:id="@+id/btn_delete"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="5dp"
                android:background="@drawable/delet"
                android:focusable="false"
                android:focusableInTouchMode="false"
                android:minHeight="50dip"
                android:minWidth="50dip" />

        </LinearLayout>
    </LinearLayout>

</LinearLayout>

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="#000000"
        android:orientation="horizontal"
        android:weightSum="1" >

        <Button
            android:id="@+id/add_btn"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:background="#000000"
            android:clickable="false"
            android:focusable="false"
            android:minWidth="64dp"
            android:text="Tambah Biodata"
            android:textColor="#FFFFFF" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <ListView
            android:id="@+id/list"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:focusable="false"
            android:focusableInTouchMode="false" />
    </LinearLayout>

</LinearLayout>

Pada folder values/strings tambahkan koding berikut untuk item spinner agama.

<string-array name="agama">
        <item>Islam</item>
        <item>Hindu</item>
        <item>Budha</item>
        <item>Protestan</item>
        <item>Katholik</item>
    </string-array> 

Kemudian pada folder src/ buatlah file java baru dengan nama seperti dibawah ini.
Main_Screen.java

package com.example.dbs;

import java.util.ArrayList;

import com.example.dbs.R;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class Main_Screen extends Activity {
    Button add_btn;
    ListView Contact_listview;
    ArrayList<Contact> contact_data = new ArrayList<Contact>();
    Contact_Adapter cAdapter;
    DatabaseHandler db;
    String Toast_msg;

    @Override
    public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 try {
     Contact_listview = (ListView) findViewById(R.id.list);
     Contact_listview.setItemsCanFocus(false);
     add_btn = (Button) findViewById(R.id.add_btn);

     Set_Referash_Data();

 } catch (Exception e) {
     // TODO: handle exception
     Log.e("some error", "" + e);
 }
 add_btn.setOnClickListener(new View.OnClickListener() {

     @Override
     public void onClick(View v) {
  // TODO Auto-generated method stub
  Intent add_user = new Intent(Main_Screen.this,Add_Update_User.class);
  add_user.putExtra("called", "Simpan");
  add_user.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
   | Intent.FLAG_ACTIVITY_NEW_TASK);
  startActivity(add_user);
  finish();
     }
 });

    }

   
    public void Set_Referash_Data() {
 contact_data.clear();
 db = new DatabaseHandler(this);
 ArrayList<Contact> contact_array_from_db = db.Get_Contacts();

 for (int i = 0; i < contact_array_from_db.size(); i++) {

     int tidno = contact_array_from_db.get(i).getID();
     String npm = contact_array_from_db.get(i).getNpm();
     String nama = contact_array_from_db.get(i).getNama();
     String alamat = contact_array_from_db.get(i).getAlamat();
     String kelamin = contact_array_from_db.get(i).getKelamin();
     String agama = contact_array_from_db.get(i).getAgama();
     Contact cnt = new Contact();
     cnt.setID(tidno);
     cnt.setNpm(npm);
     cnt.setNama(nama);
     cnt.setAlamat(alamat);
     cnt.setKelamin(kelamin);
     cnt.setAgama(agama);
     
     

     contact_data.add(cnt);
 }
 db.close();
 cAdapter = new Contact_Adapter(Main_Screen.this, R.layout.listview_row,
  contact_data);
 Contact_listview.setAdapter(cAdapter);
 cAdapter.notifyDataSetChanged();
    }

    public void Show_Toast(String msg) {
 Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show();
    }

    @Override
    public void onResume() {
 // TODO Auto-generated method stub
 super.onResume();
 Set_Referash_Data();

    }

    public class Contact_Adapter extends ArrayAdapter<Contact> {
 Activity activity;
 int layoutResourceId;
 Contact user;
 ArrayList<Contact> data = new ArrayList<Contact>();

 public Contact_Adapter(Activity act, int layoutResourceId,
  ArrayList<Contact> data) {
     super(act, layoutResourceId, data);
     this.layoutResourceId = layoutResourceId;
     this.activity = act;
     this.data = data;
     notifyDataSetChanged();
 }

 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
     View row = convertView;
     UserHolder holder = null;

     if (row == null) {
  LayoutInflater inflater = LayoutInflater.from(activity);

  row = inflater.inflate(layoutResourceId, parent, false);
  holder = new UserHolder();
  holder.name = (TextView) row.findViewById(R.id.npm_txt);
  holder.email = (TextView) row.findViewById(R.id.nama_txt);
  holder.number = (TextView) row.findViewById(R.id.alamat_txt);
  holder.kelamn = (TextView) row.findViewById(R.id.kelamin_txt);
  holder.agam = (TextView) row.findViewById(R.id.agama_txt);
  holder.edit = (Button) row.findViewById(R.id.btn_update);
  holder.delete = (Button) row.findViewById(R.id.btn_delete);
  row.setTag(holder);
     } else {
  holder = (UserHolder) row.getTag();
     }
     user = data.get(position);
     holder.edit.setTag(user.getID());
     holder.delete.setTag(user.getID());
     holder.name.setText(user.getNpm());
     holder.email.setText(user.getNama());
  holder.number.setText(user.getAlamat());
  holder.kelamn.setText(user.getKelamin());
  holder.agam.setText(user.getAgama());

     holder.edit.setOnClickListener(new OnClickListener() {

  @Override
  public void onClick(View v) {
      // TODO Auto-generated method stub
      Log.i("Edit data", "**********");

      Intent update_user = new Intent(activity,
       Add_Update_User.class);
      update_user.putExtra("called", "Update");
      update_user.putExtra("USER_ID", v.getTag().toString());
      activity.startActivity(update_user);

  }
     });
     holder.delete.setOnClickListener(new OnClickListener() {

  @Override
  public void onClick(final View v) {
      // TODO Auto-generated method stub

      // show a message while loader is loading

      AlertDialog.Builder adb = new AlertDialog.Builder(activity);
      adb.setTitle("Hapus?");
      adb.setMessage("Anda yakin ingin menghapus?");
      final int user_id = Integer.parseInt(v.getTag().toString());
      adb.setNegativeButton("TIDAK", null);
      adb.setPositiveButton("YA",
       new AlertDialog.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog,
     int which) {
        // MyDataObject.remove(positionToRemove);
        DatabaseHandler dBHandler = new DatabaseHandler(
         activity.getApplicationContext());
        dBHandler.Delete_Contact(user_id);
        Main_Screen.this.onResume();

    }
       });
      adb.show();
  }

     });
     return row;

 }

 class UserHolder {
     TextView name;
     TextView email;
     TextView number;
     TextView kelamn;
     TextView agam;
     Button edit;
     Button delete;
 }

    }

}

DatabaseHandler.java

package com.example.dbs;

import java.util.ArrayList;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class DatabaseHandler extends SQLiteOpenHelper {

    // All Static variables
    // Database Version
    private static final int DATABASE_VERSION = 1;

    // Database Name
    private static final String DATABASE_NAME = "MISRAL_DB";

    // Contacts table name
    private static final String TABLE_BIODATA = "biodata";

    // Contacts Table Columns names
    private static final String ID = "id";
    private static final String NPM = "npm";
    private static final String NAMA = "nama";
    private static final String ALAMAT = "alamat";
    private static final String KELAMIN = "kelamin";
    private static final String AGAMA = "agama";
    private final ArrayList<Contact> contact_list = new ArrayList<Contact>();

    public DatabaseHandler(Context context) {
 super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    // Creating Tables
    @Override
    public void onCreate(SQLiteDatabase db) {
 String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_BIODATA + "("
  + ID + " INTEGER PRIMARY KEY," + NPM + " TEXT,"
   + NAMA + " TEXT," + ALAMAT + " TEXT," + KELAMIN + " TEXT," + AGAMA + " TEXT" + " )";
 db.execSQL(CREATE_CONTACTS_TABLE);
    }

    // Upgrading database
    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 // Drop older table if existed
 db.execSQL("DROP TABLE IF EXISTS " + TABLE_BIODATA);

 // Create tables again
 onCreate(db);
    }

    /**
     * All CRUD(Create, Read, Update, Delete) Operations
     */

    // Adding new contact
    public void Add_Contact(Contact contact) {
 SQLiteDatabase db = this.getWritableDatabase();
 ContentValues values = new ContentValues();
 values.put(NPM, contact.getNpm()); // Contact Name
 values.put(NAMA, contact.getNama()); // Contact Phone
 values.put(ALAMAT, contact.getAlamat()); // Contact Email
 values.put(KELAMIN, contact.getKelamin());
 values.put(AGAMA, contact.getAgama());
 // Inserting Row
 db.insert(TABLE_BIODATA, null, values);
 db.close(); // Closing database connection
    }

    // Getting single contact
    Contact Get_Contact(int id) {
 SQLiteDatabase db = this.getReadableDatabase();

 Cursor cursor = db.query(TABLE_BIODATA, new String[] { ID, 
   NPM, NAMA, ALAMAT, KELAMIN, AGAMA }, ID + "=?",
  new String[] { String.valueOf(id) }, null, null, null, null);
 if (cursor != null)
     cursor.moveToFirst();

 Contact contact = new Contact(Integer.parseInt(cursor.getString(0)),
  cursor.getString(1), cursor.getString(2), cursor.getString(3), cursor.getString(4), cursor.getString(5));
 // return contact
 cursor.close();
 db.close();

 return contact;
    }

    // Getting All Contacts
    public ArrayList<Contact> Get_Contacts() {
 try {
     contact_list.clear();

     // Select All Query
     String selectQuery = "SELECT  * FROM " + TABLE_BIODATA;

     SQLiteDatabase db = this.getWritableDatabase();
     Cursor cursor = db.rawQuery(selectQuery, null);

     // looping through all rows and adding to list
     if (cursor.moveToFirst()) {
  do {
      Contact contact = new Contact();
      contact.setID(Integer.parseInt(cursor.getString(0)));
      contact.setNpm(cursor.getString(1));
      contact.setNama(cursor.getString(2));
      contact.setAlamat(cursor.getString(3));
      contact.setKelamin(cursor.getString(4));
      contact.setAgama(cursor.getString(5));
      // Adding contact to list
      contact_list.add(contact);
  } while (cursor.moveToNext());
     }

     // return contact list
     cursor.close();
     db.close();
     return contact_list;
 } catch (Exception e) {
     // TODO: handle exception
     Log.e("all_contact", "" + e);
 }

 return contact_list;
    }

    // Updating single contact
    public int Update_Contact(Contact contact) {
 SQLiteDatabase db = this.getWritableDatabase();

 ContentValues values = new ContentValues();
 values.put(NPM, contact.getNpm());
 values.put(NAMA, contact.getNama());
 values.put(ALAMAT, contact.getAlamat());
 values.put(KELAMIN, contact.getKelamin());
 values.put(AGAMA, contact.getAgama());

 // updating row
 return db.update(TABLE_BIODATA, values, ID + " = ?",
  new String[] { String.valueOf(contact.getID()) });
    }

    // Deleting single contact
    public void Delete_Contact(int id) {
 SQLiteDatabase db = this.getWritableDatabase();
 db.delete(TABLE_BIODATA, ID + " = ?",
  new String[] { String.valueOf(id) });
 db.close();
    }

    // Getting contacts Count
    public int Get_Total_Contacts() {
 String countQuery = "SELECT  * FROM " + TABLE_BIODATA;
 SQLiteDatabase db = this.getReadableDatabase();
 Cursor cursor = db.rawQuery(countQuery, null);
 cursor.close();

 // return count
 return cursor.getCount();
    }

}

Contact.java

package com.example.dbs;

public class Contact {

    // private variables
    public int _id;
    public String _npm;
    public String _nama;
    public String _alamat;
    public String _kelamin;
    public String _agama;

    public Contact() {
    }

    // constructor
    public Contact(int id, String npm, String _nama, String _alamat, String _kelamin, String _agama) {
 this._id = id;
 this._npm = npm;
 this._nama = _nama;
 this._alamat = _alamat;
 this._kelamin = _kelamin;
 this._agama = _agama;

    }

    // constructor
    public Contact(String npm, String _nama, String _alamat, String _kelamin, String _agama) {
 this._npm = npm;
 this._nama = _nama;
 this._alamat = _alamat;
 this._kelamin = _kelamin;
 this._agama = _agama;
    }

    // getting ID
    public int getID() {
 return this._id;
    }

    // setting id
    public void setID(int id) {
 this._id = id;
    }

    // getting name
    public String getNpm() {
 return this._npm;
    }

    // setting name
    public void setNpm(String npm) {
 this._npm = npm;
    }

    // getting phone number
    public String getNama() {
 return this._nama;
    }

    // setting phone number
    public void setNama(String _nama) {
 this._nama = _nama;
    }

    // getting email
    public String getAlamat() {
 return this._alamat;
    }

    // setting email
    public void setAlamat(String alamat) {
 this._alamat = alamat;
    }

    public String getKelamin() {
     return this._kelamin;
        }

        // setting email
        public void setKelamin(String _kelamin) {
     this._kelamin = _kelamin;
        }
        
        public String getAgama() {
         return this._agama;
            }

            // setting email
            public void setAgama(String _agama) {
         this._agama = _agama;
            }
}

Add_Update_User.java

package com.example.dbs;

import com.example.dbs.R;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.Toast;

public class Add_Update_User extends Activity {
    EditText add_npm, add_nama, add_alamat;
    Button add_save_btn, add_view_all, resett;
    Spinner addagama;
    RadioGroup rg;
    RadioButton kelamin,lk,pr;
    
    LinearLayout add_view, update_view;
    String valid_npm = null, valid_alamat = null, valid_nama = null,
     Toast_msg = null, valid_user_id = "", v_kelamin, v_agama;
    int USER_ID;
    DatabaseHandler dbHandler = new DatabaseHandler(this);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
 // TODO Auto-generated method stub
 super.onCreate(savedInstanceState);
 setContentView(R.layout.add_update_screen);
 add_npm = (EditText) findViewById(R.id.nim);
 add_nama = (EditText) findViewById(R.id.nama);
 add_alamat = (EditText) findViewById(R.id.alamat);

 add_save_btn = (Button) findViewById(R.id.simpann);
 resett = (Button) findViewById(R.id.button1);
 add_view_all = (Button) findViewById(R.id.tampill);
 rg=(RadioGroup)findViewById(R.id.sexsex);
 int selectid = rg.getCheckedRadioButtonId();
 kelamin = (RadioButton)findViewById(selectid);
 addagama=(Spinner)findViewById(R.id.agama);
 lk =(RadioButton)findViewById(R.id.radio0);
 pr =(RadioButton)findViewById(R.id.radio1);

 // set visibility of view as per calling activity
 String called_from = getIntent().getStringExtra("called");
 

 if (called_from.equalsIgnoreCase("Simpan")) {
  Bundle b = getIntent().getExtras();
  String sim = b.getString("called");
  add_save_btn.setText(sim);
  
  
 } else if (called_from.equalsIgnoreCase("Update")) {
  Bundle b = getIntent().getExtras();
  String updt = b.getString("called");
  add_save_btn.setText(updt);
     
     USER_ID = Integer.parseInt(getIntent().getStringExtra("USER_ID"));

     Contact c = dbHandler.Get_Contact(USER_ID);

     add_npm.setText(c.getNpm());
     add_npm.setText("");
     
     add_nama.setText(c.getNama());
     add_alamat.setText(c.getAlamat());
     String kel= c.getKelamin();
     String agam = c.getAgama();
     add_npm.setText(c.getNpm());
     if (kel.toString().equals("Laki-laki")){
      lk.setChecked(true);
     }else if (kel.toString().equals("Perempuan")){
      pr.setChecked(true);
     }
     if (agam.toString().equals("Islam")){
      addagama.setSelection(0);
     } else  if (agam.toString().equals("Hindu")){
      addagama.setSelection(1);
     } else  if (agam.toString().equals("Budha")){
      addagama.setSelection(2);
     } else  if (agam.toString().equals("Protestan")){
      addagama.setSelection(3);
     } else  if (agam.toString().equals("Katholik")){
      addagama.setSelection(4);
     }
     //dbHandler.close();

 }
 
 add_npm.addTextChangedListener(new TextWatcher() {

     @Override
     public void onTextChanged(CharSequence s, int start, int before,
      int count) {
  // TODO Auto-generated method stub

     }

     @Override
     public void beforeTextChanged(CharSequence s, int start, int count,
      int after) {
  // TODO Auto-generated method stub

     }

     @Override
     public void afterTextChanged(Editable s) {
  // TODO Auto-generated method stub
  // min lenth 10 and max lenth 12 (2 extra for - as per phone
  // matcher format)
  Is_Valid_Sign_Number_Validation(13, 13, add_npm);
     }
 });
 
 resett.setOnClickListener(new View.OnClickListener() {
  
  @Override
  public void onClick(View arg0) {
   // TODO Auto-generated method stub
  Reset_Text();
  add_save_btn.setText("Simpan");
  }
 });

 add_save_btn.setOnClickListener(new View.OnClickListener() {

     @Override
     public void onClick(View v) {
  // TODO Auto-generated method stub
  // check the value state is null or not
      int selectid = rg.getCheckedRadioButtonId();
      kelamin = (RadioButton)findViewById(selectid);
      
      if (add_save_btn.getText().toString().equals("Update")){
       upDate();
       add_save_btn.setText("Simpan");
      } else if (add_save_btn.getText().toString().equals("Simpan")) {
      if (!add_nama.getText().toString().equals("") && !add_alamat.getText().toString().equals("") && !add_npm.getText().toString().equals("") && valid_npm !=null){
   
      valid_alamat=add_alamat.getText().toString();
   valid_nama=add_nama.getText().toString();
   v_kelamin = kelamin.getText().toString();
   v_agama = String.valueOf(addagama.getSelectedItem());
      dbHandler.Add_Contact(new Contact(valid_npm, valid_nama, valid_alamat, v_kelamin, v_agama ));
      Toast_msg = "Data telah disimpan";
      Show_Toast(Toast_msg);
      Reset_Text();

      } else
      {
       Show_Toast("Data belum lengkap");
       
      }
      } else {
       Show_Toast("Maaf,field tidak diketahui.");
       add_save_btn.setText("Simpan");
      }
     }
 });
 

 add_view_all.setOnClickListener(new View.OnClickListener() {

     @Override
     public void onClick(View v) {
  // TODO Auto-generated method stub
  Intent view_user = new Intent(Add_Update_User.this,
   Main_Screen.class);
  view_user.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
   | Intent.FLAG_ACTIVITY_NEW_TASK);
  startActivity(view_user);
  finish();
     }
 });

    }

  private void upDate() {
  // TODO Auto-generated method stub
   int selectid = rg.getCheckedRadioButtonId();
   kelamin = (RadioButton)findViewById(selectid);
   valid_alamat=add_alamat.getText().toString();
    valid_nama=add_nama.getText().toString();
  valid_npm=add_npm.getText().toString();
  v_kelamin = kelamin.getText().toString();
  v_agama = String.valueOf(addagama.getSelectedItem());
         dbHandler.Update_Contact(new Contact(USER_ID, valid_npm, valid_nama, valid_alamat, v_kelamin, v_agama));
      dbHandler.close();
      Toast_msg = "Data telah di update";
      Show_Toast(Toast_msg);
      Reset_Text();
   
  
 }
    
    public void Set_Add_Update_Screen() {

    }

    public void Is_Valid_Sign_Number_Validation(int MinLen, int MaxLen,
     EditText edt) throws NumberFormatException {
 if (edt.getText().toString().length() <= 0) {
     edt.setError("Format NPM 13 digit");
     valid_npm = null;
 } else if (edt.getText().toString().length() < MinLen) {
     edt.setError("Maksimal " + MinLen + " digit");
     valid_npm = null;
 } else if (edt.getText().toString().length() > MaxLen) {
     edt.setError("Maksimal " + MinLen + " digit");
     valid_npm = null;
 } else {
     valid_npm = edt.getText().toString();

 }

    } // END OF Edittext validation

    public void Is_Valid_Email(EditText edt) {
 if (edt.getText().toString() == null) {
     edt.setError("Invalid Email Address");
     valid_alamat = null;
 } else if (isEmailValid(edt.getText().toString()) == false) {
     edt.setError("Invalid Email Address");
     valid_alamat = null;
 } else {
     valid_alamat = edt.getText().toString();
 }
    }

    boolean isEmailValid(CharSequence email) {
 return android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches();
    } // end of email matcher

    
    

    public void Show_Toast(String msg) {
 Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show();
    }

    public void Reset_Text() {

 add_npm.getText().clear();
 add_nama.getText().clear();
 add_alamat.getText().clear();
 lk.setChecked(true);
 addagama.setSelection(0);
    }

}