got NullPointer Exception when try to save data in sqlite and load next entry screen

I'm getting the Null Pointer exception , when just try to enter and create data base on sqlite. When load next new entry screen, I got NPE. Please help on that , and thanks a lot. I'm newbie on programming and android also java.

This is my application : database4.java

public class database4 extends ListActivity {
    public final static String ID_EXTRA="com.wilis.database4._ID";
    Cursor model=null;
    AlmagAdapter adapter=null;
    EditText outletno=null;
    EditText nama=null;
    EditText alamat=null;
    EditText city=null;
    EditText poscode=null;
    EditText contactperson=null;
    EditText phone=null;
    EditText hp=null;
    EditText area=null;
    EditText subarea=null;
    AlmagHelper helper=null;
    SharedPreferences prefs=null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        helper=new AlmagHelper(this);
        prefs=PreferenceManager.getDefaultSharedPreferences(this);

        outletno=(EditText)findViewById(R.id.outletno);
        nama=(EditText)findViewById(R.id.nama);
        alamat=(EditText)findViewById(R.id.alamat);
        city=(EditText)findViewById(R.id.city);
        poscode=(EditText)findViewById(R.id.poscode);
        contactperson=(EditText)findViewById(R.id.contactperson);
        phone=(EditText)findViewById(R.id.phone);

        hp=(EditText)findViewById(R.id.hp);
        area=(EditText)findViewById(R.id.area);
        subarea=(EditText)findViewById(R.id.subarea);



        initList();
        prefs.registerOnSharedPreferenceChangeListener(prefListener);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();

        helper.close();
    }

    @Override
    public void onListItemClick(ListView list, View view,
                                                            int position, long id) {
        Intent i=new Intent(database4.this, DetailForm.class);

        i.putExtra(ID_EXTRA, String.valueOf(id));
        startActivity(i);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        new MenuInflater(this).inflate(R.menu.option, menu);

        return(super.onCreateOptionsMenu(menu));
    }





    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId()==R.id.add) {
            startActivity(new Intent(database4.this, DetailForm.class));

            return(true);
        }
        else if (item.getItemId()==R.id.prefs) {
            startActivity(new Intent(this, EditPreferences.class));

            return(true);
        }

        return(super.onOptionsItemSelected(item));
    }

    private void initList() {
        if (model!=null) {
            stopManagingCursor(model);
            model.close();
        }

        model=helper.getAll(prefs.getString("sort_order", "outletno"));

        startManagingCursor(model);
        adapter=new AlmagAdapter(model);
        setListAdapter(adapter);
    }

    private SharedPreferences.OnSharedPreferenceChangeListener prefListener=
     new SharedPreferences.OnSharedPreferenceChangeListener() {
        public void onSharedPreferenceChanged(SharedPreferences sharedPrefs,
                                                                                    String key) {
            if (key.equals("sort_order")) {
                initList();
            }
        }
    };

    class AlmagAdapter extends CursorAdapter {
        AlmagAdapter(Cursor c) {
            super(database4.this, c);
        }

        @Override
        public void bindView(View row, Context ctxt,
                                                 Cursor c) {
            AlmagHolder holder=(AlmagHolder)row.getTag();

            holder.populateFrom(c, helper);
        }

        @Override
        public View newView(Context ctxt, Cursor c,
                                                 ViewGroup parent) {
            LayoutInflater inflater=getLayoutInflater();
            View row=inflater.inflate(R.layout.row, parent, false);
            AlmagHolder holder=new AlmagHolder(row);

            row.setTag(holder);

            return(row);
        }
    }

    static class AlmagHolder {
        private TextView outletno=null;
        private TextView nama=null;
        private TextView alamat=null;
        private TextView city=null;
        private TextView poscode=null;
        private TextView contactperson=null;
        private TextView phone=null;
        private TextView hp=null;
        private TextView area=null;
        private TextView subarea=null;


        private View row=null;

        AlmagHolder(View row) {
            this.row=row;
            outletno=(TextView)row.findViewById(R.id.outletno);
            nama=(TextView)row.findViewById(R.id.nama);
            alamat=(TextView)row.findViewById(R.id.alamat);
            city=(TextView)row.findViewById(R.id.city);
            poscode=(TextView)row.findViewById(R.id.poscode);
            contactperson=(TextView)row.findViewById(R.id.contactperson);
            phone=(TextView)row.findViewById(R.id.phone);
            hp=(TextView)row.findViewById(R.id.hp);
            area=(TextView)row.findViewById(R.id.area);
            subarea=(TextView)row.findViewById(R.id.subarea);




        }

        void populateFrom(Cursor c, AlmagHelper helper) {
            outletno.setText(helper.getOutletno(c));
            nama.setText(helper.getNama(c));
            alamat.setText(helper.getAlamat(c));
            city.setText(helper.getCity(c));
            poscode.setText(helper.getPoscode(c));
            contactperson.setText(helper.getContactperson(c));
            phone.setText(helper.getPhone(c));
            hp.setText(helper.getHp(c));
            area.setText(helper.getArea(c));
            subarea.setText(helper.getSubarea(c));
        }
    }
}

And this the SQLite database helper : AlmagHelper.java

package com.wilis.database4;

import android.content.Context;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;

class AlmagHelper extends SQLiteOpenHelper {
    private static final String DATABASE_NAME="dbmstoutletc.db";
    private static final int SCHEMA_VERSION=1;

    public AlmagHelper(Context context) {
        super(context, DATABASE_NAME, null, SCHEMA_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE tblmstoutlet (_id INTEGER PRIMARY KEY, outletno INT UNIQUE, nama TEXT, alamat TEXT, city TEXT, poscode INT, contactperson TEXT, phone TEXT, hp TEXT, area TEXT, Subarea TEXT);");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // no-op, since will not be called until 2nd schema
        // version exists
    }

    public Cursor getAll(String orderBy) {
        return(getReadableDatabase()
                        .rawQuery("SELECT _id, outletno, nama, alamat, city, poscode, contactperson, phone, hp, area, subarea FROM tblmstoutlet ORDER BY "+orderBy,
                                            null));


    }

    public Cursor getById(String id) {
        String[] args={id};

        return(getReadableDatabase()
                        .rawQuery("SELECT _id, outletno, nama, alamat, city, poscode, contactperson, phone, hp, area, subarea FROM msdboutlet WHERE _ID=?",
                                            args));
    }

    public void insert(String outletno, String nama, String alamat, String city, String poscode, String contactperson, String phone, String hp,
                                         String area, String subarea) {
        ContentValues cv=new ContentValues();

        cv.put("outletno", outletno);
        cv.put("nama", nama);
        cv.put("alamat", alamat);
        cv.put("city", city);
        cv.put("poscode", poscode);
        cv.put("contactperson", contactperson);
        cv.put("phone", phone);
        cv.put("hp", hp);
        cv.put("area", area);
        cv.put("poscode", poscode);



        getWritableDatabase().insert("tblmstoutlet", "outletno", cv);



    }

    public void update(String id, String outletno, String nama, String alamat, String city, String poscode, String contactperson, String phone, String hp,
             String area, String subarea)
                                          {
        ContentValues cv=new ContentValues();
        String[] args={id};

        cv.put("outletno", outletno);
        cv.put("nama", nama);
        cv.put("alamat", alamat);
        cv.put("city", city);
        cv.put("poscode", poscode);
        cv.put("contactperson", contactperson);
        cv.put("phone", phone);
        cv.put("hp", hp);
        cv.put("area", area);
        cv.put("poscode", poscode);

        getWritableDatabase().update("tblmstoutlet", cv, "_ID=?",
                                                                 args);
    }


    public String getOutletno(Cursor c) {
        return(c.getString(1));
    }


    public String getNama(Cursor c) {
        return(c.getString(2));
    }

    public String getAlamat(Cursor c) {
        return(c.getString(3));
    }

    public String getCity(Cursor c) {
        return(c.getString(4));
    }

    public String getPoscode(Cursor c) {
        return(c.getString(5));
    }

        public String getContactperson(Cursor c) {
            return(c.getString(6));
        }


        public String getPhone(Cursor c) {
            return(c.getString(7));
        }

        public String getHp(Cursor c) {
            return(c.getString(8));
        }

        public String getArea(Cursor c) {
            return(c.getString(9));
        }

        public String getSubarea(Cursor c) {
            return(c.getString(10));    




    }
}

And this is the activity for entering /loading the input : DetailForm.java

package com.wilis.database4;


import android.app.Activity;
import android.database.Cursor;

import android.widget.TextView;


public class DetailForm extends Activity {
    EditText outletno=null;
    EditText nama=null;
    EditText alamat=null;
    EditText city=null;
    EditText poscode=null;
    EditText contactperson=null;
    EditText phone=null;
    EditText hp=null;
    EditText area=null;
    EditText subarea=null;

    AlmagHelper helper=null;
    String almagId=null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        setContentView(R.layout.detail_form);

        helper=new AlmagHelper(this);

        outletno=(EditText)findViewById(R.id.outletno);
        nama=(EditText)findViewById(R.id.nama);
        alamat=(EditText)findViewById(R.id.alamat);
        city=(EditText)findViewById(R.id.city);
        poscode=(EditText)findViewById(R.id.Poscode);
        contactperson=(EditText)findViewById(R.id.Contactperson);
        phone=(EditText)findViewById(R.id.phone);
        hp=(EditText)findViewById(R.id.hp);
        area=(EditText)findViewById(R.id.area);
        subarea=(EditText)findViewById(R.id.subarea);



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

        ***save.setOnClickListener(onSave);***

        almagId=getIntent().getStringExtra(database4.ID_EXTRA);

        if (almagId!=null) {
            ***load()***;
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();

        helper.close();
    }

    private void ***load***() {
        Cursor c=helper.getById(almagId);

        c.moveToFirst();        
        outletno.setText(helper.getOutletno(c));
        nama.setText(helper.getNama(c));
        alamat.setText(helper.getAlamat(c));
        city.setText(helper.getCity(c));
        poscode.setText(helper.getPoscode(c));
        contactperson.setText(helper.getContactperson(c));
        phone.setText(helper.getPhone(c));
        hp.setText(helper.getHp(c));
        area.setText(helper.getArea(c));
        subarea.setText(helper.getSubarea(c));



        c.close();
    }

    private View.OnClickListener onSave=new View.OnClickListener() {
        public void onClick(View v) {



            if (almagId==null) {
                helper.insert(outletno.getText().toString(),
                                            nama.getText().toString(), 
                                            alamat.getText().toString(),
                                            city.getText().toString(), 
                                            poscode.getText().toString(),
                                            contactperson.getText().toString(), 
                                            phone.getText().toString(),
                                            hp.getText().toString(), 
                                            area.getText().toString(),
                                            subarea.getText().toString());
            }
            else {
                helper.update(almagId, outletno.getText().toString(),
                                            nama.getText().toString(), 
                                            alamat.getText().toString(),
                                                city.getText().toString(), 
                                                poscode.getText().toString(),
                                                contactperson.getText().toString(), 
                                                phone.getText().toString(),
                                                hp.getText().toString(), 
                                                area.getText().toString(),
                                                subarea.getText().toString()); 
            }

            finish();
        }
    };
}

And this is the Layout of entry screen : detail_form.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView
    android:id="@+id/widget60"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    xmlns:android="http://ift.tt/nIICcg">

<TableLayout xmlns:android="http://ift.tt/nIICcg"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:stretchColumns="1"
    >
    <TableRow>
        <TextView android:text="Outletno:" />
        <EditText android:id="@+id/outletno" 
                  android:inputType="number"
        />
    </TableRow>

    <TableRow>
        <TextView android:text="Nama:" />
        <EditText android:id="@+id/nama" 
                  android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
        />
    </TableRow>


    <TableRow>
        <TextView android:text="Alamat:" />
        <EditText android:id="@+id/alamat" />
    </TableRow>

    <TableRow>
        <TextView android:text="City:" />
        <EditText android:id="@+id/city"
                  android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"  
         />
    </TableRow>

    <TableRow>
        <TextView android:text="Poscode:" />
        <EditText android:id="@+id/poscode" 
                  android:inputType="number"

        />
    </TableRow>


    <TableRow>
        <TextView android:text="Contactperson:" />
        <EditText android:id="@+id/contactperson" 
                  android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"  

        />
    </TableRow>


    <TableRow>
        <TextView android:text="Phone:" />
        <EditText android:id="@+id/phone" 
                  android:inputType="number"
        />
    </TableRow>

    <TableRow>
        <TextView android:text="Hp:" />
        <EditText android:id="@+id/hp" 
                  android:inputType="number"   
        />
    </TableRow>

    <TableRow>
        <TextView android:text="Area:" />
        <EditText android:id="@+id/area" />
    </TableRow>


    <TableRow>
        <TextView android:text="Subarea:" />
        <EditText android:id="@+id/subarea" />
    </TableRow>

    <Button android:id="@+id/save"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Save"
    />
</TableLayout>
</ScrollView>