• Various fixes to Code 128, 39 encoding; DataMatrix decoding
• Improvements to speed and robustness of zxing.org decoder
• Java 9 support
• Various translation updates for Barcode Scanner
• Removed Google Glass, ZXing Test apps
• Barcode Scanner 4.7.7
• Note: core library will require Android SDK 19 when used in an Android app

https://github.com/zxing/zxing/issues?q=is:closed milestone:3.3.1