Use QuickClick to add extra 'buttons' to your Android device
One of the more interesting projects to hit Indiegogo of late is Dimple, an adhesive strip that adds two or four programmable physical buttons to your Android device.
First of all Download this app to your android phone from here : Android Playstore
Step wise instruction :
Step two: Choose from the available functions, which include Flashlight, Photo, Call, and Message. For purposes of our tutorial, tap App, then choose an app you want to be able to quick-launch.
Step three: Now decide what sequence of volume-button presses you want to use for this shortcut. You could use up-down-up, for example, or down-down-down. Make your selection via the onscreen buttons, or use the actual volume buttons. When you're done, tap Ready.
Step four: Review the available settings for this action and make any changes you want. If, for example, you don't want your device to vibrate when the action engages, clear that checkbox. When you're done, tap Finish.
And that's it! Now test the configuration to make sure it works. Wash, rinse, and repeat if you want to create other actions.
Although it may seem odd to hijack your volume buttons this way, QuickClick offers a number of useful settings that can help smooth out the bumps.
For example, by default, the app will restore the previously set volume after it runs your action. So even if you, say, press volume-down four times in a row, the volume will return to its previous level afterward.
Content Credit : CNET