Time for action – getting the sensor values and updating the user interface

Now, let's deal with the most important aspect of sensors, that is, playing with the sensor values. We have created a common activity and screen that can fit a vast number of values for all sensor types. Sensors can have varied values such as temperature or pressure; a light and proximity sensor may have only one value, while sensors such as magnetometer, accelerometer, gyroscope, linear acceleration, and gravity have the three values in the x, y, and z axes. There are other sensors that can have more than three values, for example, rotational vector, geomagnetic rotational vector, game rotational vector, and un-calibrated gyroscope. All the sensor values are passed in an array called values[], which is part of the SensorEvent object.

1. We have created a generic common SensorValuesActivity to display all the values that are coming from the different sensors. We are using the length of values[]array to determine the...