QR code generator in Android

I'm going to develop a QR code generator application for Android devices

Can someone provide some references to guide me?

resolvent:

You can visit zxing ("zebra crossing"), and you can also find an example of work here

This is zxing's 150 × 150 QR code example,

Bitmap bm = encodeAsBitmap(barcode_content, BarcodeFormat.QR_CODE, 150, 150);

if(bm != null) {
    image_view.setImageBitmap(bm);
}