java - Change bit depth from Bitmap -

so have image 32 bit depth, when make blob sqlite database, , read out again following code has 24 bit depth (the quality lower, want same quality). how 32 bit depth? :

databasehandler db = new databasehandler(camera.this);             list<database> contacts = db.getallcontacts();             (database contact : contacts) {                     bitmapfactory.options bmpfactoryoptions = new bitmapfactory.options();                     bmpfactoryoptions.inpreferredconfig = bitmap.config.argb_8888;                     //bmpfactoryoptions.inscaled = false;                     bmpfactoryoptions.outheight = 240;                     bmpfactoryoptions.outwidth = 320;                     // decodes blob bitmap                     byte[] blob = contact.getmp();                     bytearrayinputstream inputstream = new bytearrayinputstream(blob);                     bitmap bitmap = bitmapfactory.decodestream(inputstream);                     bitmap scalen = bitmap.createscaledbitmap(bitmap, 320, 240, false); 

the encode source is

bitmap image15 = bitmapfactory.decoderesource(getresources(),r.drawable.wolverineklein);              // convert bitmap byte             bytearrayoutputstream stream = new bytearrayoutputstream();             image15.compress(bitmap.compressformat.jpeg, 100, stream);             byte imageinbyte1[] = stream.tobytearray(); 

there no such thing 24 bits depth on android. bitmap can either be, 8 bits (alpha 8 format translucency or null config paletted formats), 16 bits (565 rgb format without translucency or 4444 rgba format translucency) or 32 bits (8888 rgba format translucency.)

update: means don't have alpha channel. colors encoded using 24 bits in both cases.