I am planning to develop a QR code generator application for Android devices.
Can somebody please provide me some references to guide me on this?
You can visit ZXING ("Zebra Crossing") and you can also find a working example here.
This is an example of 150x150 qr code of ZXING,
Bitmap bm = encodeAsBitmap(barcode_content, BarcodeFormat.QR_CODE, 150, 150);
if(bm != null) {
image_view.setImageBitmap(bm);
}