Android application package (APK) is the package file format used by the Android operating system for distribution and installation of mobile apps and middleware.
The apps come as APK files so that they could be installed on an Android device. Now the thing is, unlike the .exe and .dmg files, these files cannot be installed directly, and we will have to make some arrangements on our Android device first. So let’s see how can you install these APK files manually when you get one someday.
APK files can be installed on Android powered devices just like installing software on PC. When a user downloads and installs an Android application from either an official source (such as Google Play), or from some other (unofficial) site, they are installing an APK file on their device. A user or developer can also install an APK file directly to a device (that is, not via download from the network) from a desktop computer, using a communication program such as adb. By default, the ability to install from unofficial sites or directly from a desktop is disabled for security reasons on most Android devices. You can enable it by changing the setting “Unknown sources” in the Settings menu.
When you want to install an APK manually, just open the APK installer app and navigate to the folder where you have your APK files saved. Now, simply click on the application to bring on the installation screen. Click the install button to successfully install the application.—————————————————————————————————–