If you are involved in an accident, big changes you carry your phone with you. For the paramedics it is important to know who to call. This tutorial shows how you can setup your Android phone with emergency contact info on the lock screen.
I sometimes use the Android Emulator for app development. The reason I use it sometimes is the slowness of the Android Emulator on my system. It took ages to boot and when it finally ran, the user interaction wasn’t quite smooth.
The origin for this problem resides in the ARM architecture which is used by the emulator. Emulating ARM on a x86 platform is very slow. To overcome this problem I often connect my “real” Android smartphone via USB which works a lot smoother than the Android Emulator on my Mac.