sqlite 데이터베이스에서 레코드를 삭제하는 동안 오류가 발생했습니다.

안녕하세요, sqlite 데이터베이스에서 레코드를 삭제하는 동안 버그에 직면하고 있습니다. 그냥 Sqlite 클래스를 만드십시오. 하나는 내가 cartAdpter를 호출하는 placeorder 파일입니다 .holder.delete 버튼을 클릭하면 모든 레코드가 사용자 정의 목록에 표시됩니다. sqlite db의 obj를 만들고 delete 메서드를 호출하지만 exaption을 생성합니다.

주문 파일

public class PlaceOrder extends Activity {

    String [] pIds; 
    String [] pNames; 
    String [] pPrizes; 
    ListView lv;
    ImageView bck;
    String [] listImages;
    String food_id;
    String userdata[];
    Intent i;
    TextView totalprze;
    float tprize;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_place_order);

        lv=(ListView)findViewById(R.id.cart_list);
        bck=(ImageView) findViewById(R.id.placeholder_bg_btn);
        totalprze =(TextView) findViewById(R.id.place_order_price);

        i=new Intent(this,Menu.class);

        bck.setOnClickListener(new OnClickListener() {


            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                 Bundle bundle=new Bundle();

                    //bundle.putStringArray("images", ListImages);
                    bundle.putString("food_id", food_id);
                    bundle.putStringArray("images", listImages);
                    bundle.putStringArray("userData",userdata);
                    i.putExtras(bundle);
                    startActivity(i);
            }
        });


        if(this.getIntent().getExtras()!=null)
        {

         Bundle b=this.getIntent().getExtras();

         pIds=b.getStringArray("pId");
         pNames=b.getStringArray("PName");
         pPrizes=b.getStringArray("pPrize");
         userdata=b.getStringArray("userData");
         tprize=b.getFloat("totalprize");


         food_id=b.getString("food_id");
         listImages=b.getStringArray("images");
         String prz=Float.toString(tprize);
         totalprze.setText("$"+prz);
         lv.setAdapter(new cartAdapter(PlaceOrder.this, pIds, pNames, pPrizes));

       }
    }

}

cartAdapter 파일

public class cartAdapter  extends BaseAdapter{

     String [] pIdz;
     String [] pNamz;
     String [] pPrizs;
    // List<String> imges;
     Context context;
     private ShopingCartHelper obj;

     private static LayoutInflater inflater=null;
     JSONArray jCat = null;
     int count=0;
     ProgressDialog pDialog;


     public cartAdapter(PlaceOrder ctx,
             String[] pIds,String[] pNams, String[] pprise) {

         pIdz=pIds;
         pNamz=pNams;

         context=ctx;
         pPrizs=pprise;
         inflater = ( LayoutInflater )context.
                         getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        // TODO Auto-generated constructor stub

     }

        @Override
    public int getCount() {
        // TODO Auto-generated method stub
            if(pIdz==null){
                Toast.makeText(context, "There is issue with net connection.", Toast.LENGTH_LONG).show();
                //Intent i=new Intent(context,WelcomeActivity.class);
                //context.startActivity(i);
                return count ;
            }else{
                return pIdz.length;
            }

        }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;

    }

    public class holder{
         TextView pid;
         TextView pname;
         TextView pprise;
         Button delete;
         ListView lv;

    }
    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {

        final holder hldr=new holder();
        View rowView = null;
        Bitmap bitmap = null;



          rowView = inflater.inflate(R.layout.place_order_item_list, null);
          hldr.pid=(TextView) rowView.findViewById(R.id.item_id);
          hldr.pname=(TextView) rowView.findViewById(R.id.item_name);
          hldr.pprise=(TextView) rowView.findViewById(R.id.item_price);
          hldr.delete=(Button) rowView.findViewById(R.id.delete);       
          hldr.pid.setText(pIdz[position]);
          hldr.pname.setText(pNamz[position]);
          hldr.pprise.setText(pPrizs[position]);
          //
          //  Picasso.with(context).load(imgs[position]).into(hldr.img);
          hldr.delete.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                // rowView.remove(position); //removing from your List
                Toast.makeText(context, "Delete",Toast.LENGTH_LONG).show();
                int pid=Integer.parseInt(hldr.pid.getText().toString());

                obj.delProduct(pid);


              }
        });
           rowView.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
//              // TODO Auto-generated method stub
//               cartAdapter.this.pIdz.remove[position];

            //  Toast.makeText(context, "hi",Toast.LENGTH_LONG).show();
            }
        });
         return rowView;

        // TODO Auto-generated method stub
    }
}

쇼핑 카트 도우미 파일

public class ShopingCartHelper extends SQLiteOpenHelper{

   public static final String DATABASE_NAME = "cart.db";
   public static final String PRODUCT_TABLE_NAME = "prodcut";
   public static final String p_id = "id";
   public static final int VERSION =1;

  SQLiteOpenHelper helper;
  SQLiteDatabase db;
  // Context context;
   public ShopingCartHelper(Context context)
   {
      super(context, DATABASE_NAME , null, 1);

   }

   @Override
   public void onCreate(SQLiteDatabase db) {
      this.getWritableDatabase();
      db.execSQL(
      "create table prodcut " +
      "(id integer primary key, user_id text,product_name text,price text)"
      );
   }

   @Override
   public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
      // TODO Auto-generated method stub
      db.execSQL("DROP TABLE IF EXISTS prodcut");
      onCreate(db);
   }

   public boolean insertProduct  (String user_id, String product_name, String price)
   {
      SQLiteDatabase db = this.getWritableDatabase();
      ContentValues contentValues = new ContentValues();
      contentValues.put("user_id", user_id);
      contentValues.put("product_name", product_name);
      contentValues.put("price", price);    
      db.insert("prodcut", null, contentValues);
      return true;
   }
   public void delProduct(int pid)
   {
     SQLiteDatabase database =this.getReadableDatabase();
     db.rawQuery( "delete * from prodcut where id="+pid+"", null );
   }


   public Cursor getData(String user_id){
      SQLiteDatabase db = this.getReadableDatabase();
      Cursor res =  db.rawQuery( "select * from prodcut where user_id="+user_id+"", null );
      return res;
   }

   public int numberOfRows(){
      SQLiteDatabase db = this.getReadableDatabase();
      int numRows = (int) DatabaseUtils.queryNumEntries(db, PRODUCT_TABLE_NAME);
      return numRows;
   }


}

오류

10-27 10:28:48.608: E/AndroidRuntime(925): FATAL EXCEPTION: main
10-27 10:28:48.608: E/AndroidRuntime(925): java.lang.NullPointerException
10-27 10:28:48.608: E/AndroidRuntime(925):  at student.briyani.cartAdapter$1.onClick(cartAdapter.java:114)
10-27 10:28:48.608: E/AndroidRuntime(925):  at android.view.View.performClick(View.java:3511)
10-27 10:28:48.608: E/AndroidRuntime(925):  at android.view.View$PerformClick.run(View.java:14105)
10-27 10:28:48.608: E/AndroidRuntime(925):  at android.os.Handler.handleCallback(Handler.java:605)
10-27 10:28:48.608: E/AndroidRuntime(925):  at android.os.Handler.dispatchMessage(Handler.java:92)
10-27 10:28:48.608: E/AndroidRuntime(925):  at android.os.Looper.loop(Looper.java:137)
10-27 10:28:48.608: E/AndroidRuntime(925):  at android.app.ActivityThread.main(ActivityThread.java:4424)
10-27 10:28:48.608: E/AndroidRuntime(925):  at java.lang.reflect.Method.invokeNative(Native Method)
10-27 10:28:48.608: E/AndroidRuntime(925):  at java.lang.reflect.Method.invoke(Method.java:511)
10-27 10:28:48.608: E/AndroidRuntime(925):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-27 10:28:48.608: E/AndroidRuntime(925):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-27 10:28:48.608: E/AndroidRuntime(925):  at dalvik.system.NativeStart.main(Native Method)