How to install external .apk file on android emulator

To install an external APK on Android Virtual Deice (AVD) or on Emulator go through the following step-by-step procedure. 

Step-1:

 

Launch the emulator

Step-2:

Paste your APK file whichever you want to install on emulator in android-sdk-windows\platform-tools directory.

Step-3:

open cmd prompt and move to platform-tools folder of Android SDK directory.

Step-4:

Run the  following command:
adb install "xxx.apk"
Example: abd install "Indianlaws.apk" 

If Exists: If the emulator is already has that application it will give a failure notification to the user - [ INSTALL_FAILED_ALREADY_EXISTS ].