==================== Problem Description ====================
Let's do the API for Android.
It's 4.0 or 4.0.3.
Is it possible to run with 4.0 Android 2.3?
==================== Solution 1====================
Only 2.3 can let 4.0 run, not 4.0 let 2.3 run
==================== Solution 2====================
Can run, but some 4.0 of the API is not available in 2.3.
==================== Solution 3====================
In general, you can simply set up a compatible minimum API version and a maximum API version in the XML configuration file, such as setting minsdkversion= "8", which indicates the smallest Android version: Android 2.2, up-to-date;
One version of your choice means that you are using this version of the SDK API feature, and you need to be aware of the compatibility of some features of each version of the SDK with the screen resolution, such as some of the API methods and some of the obsolete API features, which require you to work in the code, such as :
int currentapiversion = Android.os.Build.VERSION.SDK_INT; if (currentapiversion >= Android.os.Build.VERSION_CODES. FROYO) {//compatible with this version of the method ...} else{//General version of the method}
==================== Solution 4====================
4 The API class that is useless to 4.0 features, and can run under 2.3.
Android version Issue
