如何在Android中将byte []的ArrayList转换为Integer数组？

Question

I'm trying to convert an ArrayList<byte[]> listByte to an Integer[] arrInteger . I'm getting the listByte of pictues from a server through an object. My goal is to get this Array of Integer (pictures) to later use it in a ListView ( arrayAdapter = new MyClass(MyActivity.this, stringArr, arrInteger); . I tried like this:

ArrayList<Integer> integerList = new ArrayList<>();
   for (int i = 0; i < objectList.size(); i++) {
     integerList.add(ByteBuffer.wrap(objectList.get(i).getPicture()).getInt(i));
    /*integerList.add(new BigInteger(objectList.get(i).getImage()).intValue());*/ //I tried this too
    }

and to an Array of Integer , like this:

Integer[] arrInteger = new Integer[integerList.size()];
arrInteger = integerList.toArray(arrInteger);

When i run the app, the ListView is showing without pictures. So I used debug and I found that my arrInteger = null !. How do I convert correctly?

Answer 1

Decode back to Bitmap

   ArrayList<Bitmap> imgs = new ArrayList<Bitmap>();
   for(byte[] array: listByte)
   {
        Bitmap bm = BitmapFactory.decodeByteArray(array, 0, array.length); //use android built-in functions
        imgs.add(bm);
   }