The Redmi Note 4G has a 5.5 inch screen, placing it on the larger end of smartphone screens. Because its screen is over 5.3 inches, this phone also qualifies as a phablet.
You can install .apk files to emulator regardless of what you are using (Eclipse or Android Studio). here's what I always do: (For full beginners).1- Run the emulator, and wait until it's completely started.- now open run.bat and write adb install your_apk_file.apk. 6- wait until the installation is complete. 7- voila your apk is installed to your emulator. Note: to re-install the application if it already existe use adb install-r your_apk_file.apk. sorry for the detailed instruction as I said for full beginners.
.apk extension stands for android package file. It is a file format used to distribute and install applications.It includes the programm codes ,assets ,resourses ,certificates and manifest file. .Dex extensions stands for Dalvix Executable files.