Android backward compatibility techniques
问题 I am now advanced in developing my 15-activities android app which is based on the latest API (15 ICS). Now I discovered that main functionalists of the app is NOT backward compatible even with the android v4 support such as: 1-fragmentTransaction animation 2-the ability to putStringSet in sharedPref 3-having mapActivity using fragments I thought about making a second version for the older OS's of EACH class that has incompatibility issues (which are around 10) so I use them if I detect that