Install Existing apk file to Android Emulator

To install existing apk files to emulator do the following :
Step 1: Check for adb in "tools" or in "platform-tools" folder of the sdk directory.

Step 2: Copy the apk file and place it in the corresponding directory where adb is present.

Step 3: Now in the command line move to the directory where adb is present and run the following command

Note:Now you can see the application installed in the emulator.

To un-install from emulator do the following :
Step 1:In the command line move to the directory where adb is present and run the following command