Hello everyone! The term proximity is basically the fact, condition or position of being near or close by in space. A proximity sensor is a device capable of detecting presence of nearby objects without any physical contact. Some of the Android phones in the market today come equipped with a proximity sensor. Through this post, we will learn how to use a proximity sensor in Android. As mentioned in the developer's guide, the Android platform provides a sensor that lets you determine how close the face of a device is to an object (known as the proximity sensor).