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What are the most important features that I will skip focusing on Android API 3 (OS 1.5) rather than the latest API?

I start with Android development. I know that on OS 1.5 or 1.6 there are still Android devices, so I think about the need to maintain the API level at least for support.

What will I miss from 2.2?

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You can make your application backward compatible. You will need to specify the target SDK as 2.2 and the minimum SDK as 1.5

, . , , - SDK (API ..), , SDK. http://developer.android.com/resources/articles/backward-compatibility.html.

, - http://android-developers.blogspot.com/2010/07/how-to-have-your-cupcake-and-eat-it-too.html

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, , Android 1.5, RelativeLayout. 1.5 RelativeLayout , , Android 1.6+. , layout_center * 1.5, RelativeLayout.

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Add to this list the flaw of the onClick attribute in the schema 1.5

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Source: https://habr.com/ru/post/1768274/

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