The corresponding API number for Android version

Android version API level

1.5 API 3

1.6 API 4

2.1 API 7

2.2 API 8

2.3.3 API 10

3.0 API 11

3.1 API 12

3.2 API 13

4.0 API 14

4.0.3 API 15

4.1.2 API 16

4.2.2 API 17

4.3 API 18

4.4.2 API 19

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As of March 2014, version market share http://www.cnbeta.com/articles/275481.htm

2.3% 19%

4.0% 15.2%

4.1.x% 35.3%

4.2.x% 17.1%

4.3% 9.6%

2.3 are very old machines, "non-universal" app developers (if your app faces users who are professional users, and these users can not use the old Android phone), then decisively abandon the support of 2.3.

I now use the cock wire Huawei Machine, version 4.2.2