I know what you are thinking right now ‘is he trying to tell us that we can connect mouse and keyboard to an android device ‘ yes that exactly what am trying to tell you. you can connect a mouse to your Android tablet and get a mouse cursor, also you can connect an Xbox 360 controller and play a game, console-style. And you can even connect a keyboard and use it just like in a pc and experience the full keyboard functionality like Shift Alt+Tab and so on.
Android supports mice, keyboards, and even gamepads. On many Android devices, you can connect USB peripherals to your device. On other Android devices, you may need to connect them wirelessly via Bluetooth.
Here is the cable that made everything possible
Okay let me get this straight, you are not actually thinking that you will just connect the whole USB as it is on the device Nah! Android phones and tablets don’t have standard, full-size USB ports, so you can’t plug a USB peripheral directly into it. To actually connect a USB device to your Android device, you’ll need a USB on-the-go cable. A USB OTG cable is an adapter that plugs into the Micro-USB port on your device and allows you to connect full-size USB peripherals. A USB OTG cable may also allow you to use other USB devices with your Android. For example, you can connect a USB flash drive to your Android phone or tablet.
Important Note: Not every Android device supports peripherals with a USB OTG cable. Some devices don’t have the appropriate hardware support. For example, you can connect USB mice and keyboards to a Nexus 7 tablet, but not a Nexus 4 smartphone. Be sure to Google whether your device supports USB OTG before purchasing a USB OTG cable.
Once you have a USB OTG cable, just plug it into your device and connect the USB device directly to it. Your peripherals should work without any additional configuration.
A USB OTG cable isn’t something you can say that the future is bright because this thing is changing everything we knew about tablets. Tablet is actually a portable computer so when you start adding on the mouse , keyboard, and everything that this cable is able to read to what should be a portable device, that becomes something else . anyway it a good thing to have, especially when you want to get things done so fast. Many devices also don’t support USB OTG cables.
If your device doesn’t support USB OTG or you just don’t like wires, you’re still in luck. You can connect wireless Bluetooth mice, keyboards, and gamepads directly to your phone or tablet. Just use your Android’s Bluetooth settings screen to pair it with your device, just as you’d pair a Bluetooth headset. You’ll find this screen at Settings -> Bluetooth.
If you’re shopping for a mouse or keyboard to use with your Android tablet, you’ll probably want to purchase Bluetooth devices to avoid messing around with cables
How to connect and use a mouse, keyboard & Gamepads
Connecting and using your peripherals it an easy task. All of these input peripherals require no rooting or something of a sort.
• Mouse: Connect a mouse and you will see a familiar mouse cursor appear on your screen. The cursor can be used to navigate through Android’s interface, clicking on things you’d normally tap. It works just like it would on a computer. Of course, you can also still reach out and touch the screen while the mouse is connected.
• Keyboard: Your keyboard should just work when typing in text fields, allowing you to type at a reasonable speed on a mechanical keyboard and see more of the screen by removing the need for the on-screen, touch keyboard. Many keyboard shortcuts work like they do on computers, including Alt+Tab for switching between recent apps and Ctrl + X, C, or V for Cut, Copy, and Paste.
• Gamepad: The gamepad can be used to navigate through Android’s home-screen interface and launch apps, but that’s not the ideal use. You’ll need to use the gamepad with games that support controllers. Some games (like the Sonic platformer games for Android) beg for one and work much better with a controller than with the standard touch-screen controls.