Integer.valueOf(android.os.Build.VERSION.SDK);
Values are:
Platform Version API Level
Android 9.0 28
Android 8.1 27
Android 8.0 26
Android 7.1 25
Android 7.0 24
Android 6.0 23
Android 5.1 22
Android 5.0 21
Android 4.4W 20
Android 4.4 19
Android 4.3 18
Android 4.2 17
Android 4.1 16
Android 4.0.3 15
Android 4.0 14
Android 3.2 13
Android 3.1 12
Android 3.0 11
Android 2.3.3 10
Android 2.3 9
Android 2.2 8
Android 2.1 7
Android 2.0.1 6
Android 2.0 5
Android 1.6 4
Android 1.5 3
Android 1.1 2
Android 1.0 1
CAUTION: don't use android.os.Build.VERSION.SDK_INT if <uses-sdk android:minSdkVersion="3" />.
You will get exception on all devices with Android 1.5 and lower because Build.VERSION.SDK_INT is since SDK 4 (Donut 1.6).