Step Detector and Step Counter Sensors on Android

Android KitKat has added a few more hardware sensors to it's API list. Step Sensors are one of them, which looks very promising. Although, not a lot of phones yet have these Step Sensors, in the future, this would gradually become a standard I think. Currently, Nexus 5 has them.

Let's see how we can interact with these sensors. Basically, there are 2 sensors.

1. Step Counter: This keeps a count of the number of steps that you have taken. The counter is only reset when you re-boot the device, else, for every step you take (or the phone thinks you took, you counts up).
2. Step Detector: This sensor just detects when you take a step. That's it. 

The example project shows you how to initialize and setup the SensorManager and respond to events from the Sensors.

// Step Counter 
sManager.registerListener(new SensorEventListener() { 
@Override 
public void onSensorChanged(SensorEvent event) { 
float steps = event.values[0]; 
textViewStepCounter.setText((int) steps + ""); 
} 
@Override 
public void onAccuracyChanged(Sensor sensor, int accuracy) { 
} 
}, sManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER), 
SensorManager.SENSOR_DELAY_UI);

// Step Detector 
sManager.registerListener(new SensorEventListener() { 
@Override 
public void onSensorChanged(SensorEvent event) { 
// Time is in nanoseconds, convert to millis 
timestamp = event.timestamp / 1000000; 
} 
@Override 
public void onAccuracyChanged(Sensor sensor, int accuracy) { 
} 
}, sManager.getDefaultSensor(Sensor.TYPE_STEP_DETECTOR), 
SensorManager.SENSOR_DELAY_UI); 

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本文转自wanqi博客园博客，原文链接：http://www.cnblogs.com/wanqieddy/p/3918818.html，如需转载请自行联系原作者