update sample to Android SDK 4.9.
update sample to Android SDK 4.8.1.
update demo to Android SDK 4.7.1.
Update demo to Android SDK 4.7.
update demo to Android SDK 4.6.
Update demo to Android SDK 4.5.1.
Update demo to Android SDK 4.4.1.
Update sample to Android SDK 4.3.2.
update sample to Android SDK 4.2
Update sample to Android SDK 4.1.1.