If you would like to install on your Android device an .apk file that you have built or downloaded from the web, there are several ways to do it. If your Android phone or tablet is connected to your Linux machine via USB, then the easiest way is to use adb (so-called Android Debug Bridge), which is a command line utility that allows you to communicate with Android devices or emulator via USB.
First of all, you need to configure your Android device to accept apk files, not downloaded from Android Market (or now known as Google Play). To do that, go to "Settings" -> "Applications" on your Android device. Check "Unknown sources" box to allow installation of non-Market applications.
Now connect your Android device to Linux machine via USB, and start an adb server.
Browse a list of connected Android devices or emulator instance:
List of devices attached 3931F425198800EC device
Along with a list of emulator/device instances, the command above shows their corresponding adb-assigned serial numbers (e.g., "emulator-5556" and "3931F425198800EC"), which you will need to know to connect to them.
Transfer .apk file to the download folder of your device:
If there is only one connected device, you can omit "-s 3931F425198800EC" in the above command.
Open up a file browser app on Android (e.g., "My Files" app), and go to /sdcard/download folder. Click on the downloaded .apk file to install it.
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