1. Android 1.0 :
Android 1.0 is the very first version of Android which was introduced by Google. It had some basic features including web browser support, camera support, Gmail counts, Google maps and Youtube application. Although it does not have the official version name like further introduces versions but unofficially it is called Apple Pie. The API level in Android 1.0 version is 1. It is not used anymore in the mobile devices. It was released on 23 September 2008.
2. Android 3.1 :
Android 3.1 is next version of Android after Android 3.0 which was introduced by Google. It had all the features of previous versions and some new features were also added in this version. New user features like UI improvements, open Accessory API, USB host API, joysticks and gamepads support, MTP notifications and RTP API for audio were introduced in this version. No new developer feature was added in this version. Its version name is Honeycomb. The API level in Android 3.1 is 12. It was released on 10 May 2011.
Difference between Android 1.0 and Android 3.1 :
|S.No.||ANDROID 1.0||ANDROID 3.1|
|1.||It is the first version of Android.||It is the next version of Android after Android 3.0.|
|2.||It is predecessor to Android 1.1.||It is predecessor to Android 3.2 and successor to Android 3.0.|
|3.||It was released on 23 September 2008.||It was released on 10 May 2011.|
|4.||The API level in Android 1.0 version is 1.||The API level in Android 3.1 version is 12.|
|5.||It did not support joysticks and gamepads.||Features like joysticks and gamepads support were added in this version.|
|6.||It does not have official version name.||It has official version name like its other previous versions.|
|7.||It has unofficial version name ‘Apple Pie’.||It has official version name ‘Honeycomb’.|
|8.||It did not have good quality user interface.||Improved user interface was introduced in this version.|
|9.||It had limited basic features like google maps, gmail, web browser, camera and youtube.||It had all features of previous versions and some new features were added in this version.|
|10.||It did not have open accessory API and USB host API.||Open accessory API and USB host API were added in this version.|