Android- Insert blob into a SQLite database column [duplicate]

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• What is a Null Pointer Exception, and how do I fix it? 12 answers

I converted array of bitmap images into Blob.I need to insert it into a sqlite database.and set the values into a list adapter.But it thows a Nullpointer exception in line : Bitmap b1=BitmapFactory.decodeByteArray(abc, 0, abc.length); and crashes my device.

MainActivity.java

public class MainActivity extends Activity{

ListView prd_list;
public static Integer clas;
public static byte [] img,img1;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    prd_list = (ListView) findViewById(R.id.list);
    DataBaseHandler dbh = new DataBaseHandler(this);

    /////////////////convert png images to bitmap//////////

    Bitmap[] images = { BitmapFactory.decodeResource(getResources
            (),R.drawable.candle1),BitmapFactory.decodeResource(getResources   
            (),R.drawable.candl3),BitmapFactory.decodeResource(getResources(),R.drawable.candl4),BitmapFactory.decodeResource(getResources(),R.drawable.candl5)}; 
    ByteArrayOutputStream bos=new ByteArrayOutputStream();
//        images.compress(Bitmap.CompressFormat.PNG, 100, bos);
    img=bos.toByteArray();



    ////////////////////////////////////////////////////////


     SQLiteDatabase db = dbh.getWritableDatabase();
    Cursor cr = db.rawQuery("SELECT * FROM product", null);
    final String[] pname = new String[cr.getCount()];
    String[] price = new String[cr.getCount()];

    String[] pmge=new String[cr.getCount()];

    int i = 0;
    while(cr.moveToNext())
    {
        String name = cr.getString(cr.getColumnIndex("pname"));
        String prprice = cr.getString(cr.getColumnIndex("pprice"));
        img=cr.getBlob(cr.getColumnIndex("pimage"));

        pname[i] = name;
        price[i] = prprice;
        i++;
    }

    ListAdapter adapter = new ListAdapter(this, pname, price);
    prd_list.setAdapter(adapter);

}
private ListAdapter getListAdapter() {
    // TODO Auto-generated method stub
    return null;
}

}

DataBaseHandler.java

public void onCreate(SQLiteDatabase db) {
    // TODO Auto-generated method stub

    db.execSQL("CREATE TABLE IF NOT EXISTS product(pimage BLOB,pid INTEGER PRIMARY KEY,pname TEXT,pprice NUMERIC,pspec TEXT,pfeature TEXT)");

    db.execSQL("INSERT INTO product(pimage,pname,pprice,pspec) VALUES('img','Candle stick 1',4000,'Solar garden / pathway light,Solar Panel:1pc crystal silicon solar cell, Battery:1pc 1.2V Ni-MH/Ni-CD AA battery 600MA ,Material:Stainless steel ,WaterProof and safe ')");

Listadapter.java

public class ListAdapter extends BaseAdapter {

byte[] abc=MainActivity.img;

private final String[] pname;
private final String[] price;

private Context mcontext;
    public ListAdapter(Context c,String[] pname,String[] price){

    mcontext=c;
    this.pname=pname;
    this.price=price;

}

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return pname.length;
    }

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

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
         View List;
         LayoutInflater mLayoutinflater=(LayoutInflater) mcontext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         if(convertView==null){
         List=new View(mcontext);

         List=mLayoutinflater.inflate(R.layout.mylist, parent, false);
         }
         else{
         List = (View)convertView;
         }

         TextView textView1 = (TextView)List.findViewById(R.id.pr_name);
         TextView textView2 = (TextView)List.findViewById(R.id.pr_price);
         ImageView imageview= (ImageView)List.findViewById(R.id.pr_img);
         textView1.setText(pname[position].toString());
         textView2.setText("Rs "+price[position] +" /-");

   ////////////error line/////////////

         Bitmap b1=BitmapFactory.decodeByteArray(abc, 0, abc.length);

   ///////////////////////////////////////////      
         imageview.setImageBitmap(b1);


  //       imageview.setImageResource(pmge[position]);
         // TODO Auto-generated method stub
         return List;

    }

}