Android smartphones have a small set of volume keys often called the volume rocker. The key on the up is used to turn the volume up and the lower key is used for turning it down. These keys are actually made of very tiny metallic push switches. Since these keys are used a lot, the metal used to spring back the keys in the off position soon wears out and the keys stop working properly.
If the volume keys in your Android smartphone are broken then you can still manage to easily turn the volume up or down using a set of virtual volume keys using the app named Virtual Volume Key. This app displays the volume keys right on the smartphone screen so that you can turn the volume up or down by touching on these small virtual buttons on the screen.
Once the Virtual Volume Key app is installed in your Android phone, you have to launch this app and turn it on. A small volume rocker is instantly displayed on your device screen. You can drag it around anywhere on your screen. But the keys are soon dimmed and docked to one edge of your screen. How dim the keys become depends on the “diaphaneity” value of the app. This is basically the alpha value for the volume rocker and makes the display more or less transparent. Similarly, how long it takes to dock to one of the edges or sides of the screen depends on the “wait time” value which is set in number of seconds.
These virtual volume keys work exactly like the physical volume keys in all kinds of situations. It is great help when the physical volume keys are broken or have worn out due to heavy and long use. You can also use this app to make the volume keys last longer in a smartphone.
You can get the Virtual Volume Key app for Android from https://play.google.com/store/apps/details?id=com.lighttea.volumekey.