How does an Android API get data from hardware? For example, how does the getX() function get the x-axis value from the accelerometer sensor?
How does an Android API get data from hardware? For example, how does the
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How does an Android API get data from hardware? For example, how does the getX() function get the x-axis value from the accelerometer sensor?
Overly broad question: it varies depending on hardware data source. In the case of the example you picked, there is a native service that handles the JNI calls for Sensors (see here): this fetches the data from a file descriptor that the hardware driver feeds.