1. Android 1.1：
Android 1.1是Google继Android 1.0之后推出的第二个Android版本。它具有以前版本(即Android 1.0)中包含的所有功能，并且在此版本中还添加了一些其他功能。在呼叫者应用程序中添加了一些功能，例如隐藏和显示数字键盘。此版本中还添加了用于保存MMS附件的功能。它也没有像Android 1.0这样的正式版本名称，但非正式地称为Banana Bread 。 Android 1.1中的API级别为2。它于2009年2月9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 1.1和Android 2.0之间的区别：
| S.No. | ANDROID 1.1 | ANDROID 2.0 |
|---|---|---|
| 1. | It is the second version of Android. | It is the next version of Android introduced after Android 1.6 version. |
| 2. | It is successor to Android 1.0 version. | It is successor to Android 1.6 version. |
| 3. | It is predecessor to Android 1.5. | It is predecessor to Android 2.0.1. |
| 4. | It was released on 9 February 2009. | It was released on 26 October 2009. |
| 5. | The API level in Android 1.1 version is 2. | The API level in Android 2.0 version is 5. |
| 6. | It does not have official version name like its successors. | It has official version name like its previous version. |
| 7. | It has unofficial version name ‘Banana Bread’. | It has official version name ‘Eclair’. |
| 8. | It had all the features of previous version and two more features were added in this version. | It had all the features of all previous versions and some more prominent features were added in this version. |
| 9. | Ability to show and hide numeric key-board was introduced in this version. | Updated user interface was introduced in this version. |
| 10. | Feature for saving MMS attachments was added in this version. | Bluetooth 2.1 and live wallpaper features were added in this version. |
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