1. Android 1.0：
Android 1.0是Google推出的第一个Android版本。它具有一些基本功能，包括Web浏览器支持，相机支持，Gmail计数，Google地图和Youtube应用程序。尽管它没有正式的版本名称(如进一步介绍的版本)，但非官方地将其称为Apple Pie 。 Android 1.0版本中的API级别为1。在移动设备中不再使用它。它于2008年9月23日发布。
2. Android 2.0：
Android 2.0是Google推出的Android 1.6之后的下一个Android版本。它具有以前版本中包含的所有功能，即Android 1.0，Android 1.1，Android 1.5和Android 1.6，并且在此版本中添加了一些突出的功能。此版本引入了HTML，Microsoft支持，蓝牙2.1，动态壁纸和更新的UI等功能。该版本具有版本名称。其版本名称为Eclair 。 Android 2.0中的API级别为5。它于2009年10月26日发布。
Android 1.0和Android 2.0之间的区别：
| S.No. | ANDROID 1.0 | ANDROID 2.0 |
|---|---|---|
| 1. | It is the first version of Android. | It is the next version of Android introduced after Android 1.0, Android 1.1, Android 1.5 and Android 1.6. |
| 2. | It is predecessor to Android 1.1. | It is predecessor to Android 2.0.1 and successor to Android 1.6. |
| 3. | It was released on 23 September 2008. | It was released on 26 October 2009. |
| 4. | The API level in Android 1.0 version is 1. | The API level in Android 2.0 version is 5. |
| 5. | It is not used anymore in mobile devices. | It is also not used anymore. |
| 6. | It does not have official version name. | It has official version name like its previous version. |
| 7. | It has unofficial version name ‘Apple pie’. | It has official version name ‘Eclair’. |
| 8. | It had limited features like google maps, gmail, web browser, camera and youtube. | It had all the features of all previous versions and some more prominent features were added in this version. |
| 9. | It did not have good user interface. | Updated user interface was introduced in this version. |
| 10. | It did not provide features like live wallpapers and Bluetooth. | Bluetooth 2.1 and live wallpaper features were added in this version. |
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