android距离传感器开发,Android Proximity Sensor近距离传感器P-Sensor详解

package zhangphil.sensor;

import android.content.Context;

import android.hardware.Sensor;

import android.hardware.SensorEvent;

import android.hardware.SensorEventListener;

import android.hardware.SensorManager;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

public class MainActivity extends AppCompatActivity {

private SensorManager mSensorManager;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

startSensor();

}

/**

* 启动传感器。

*/

private void startSensor() {

mSensorManager = (SensorManager) this.getSystemService(Context.SENSOR_SERVICE);

Sensor mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);

if (mSensorManager == null || mSensor == null) {

throw new UnsupportedOperationException("设备不支持");

}

boolean isRegister = mSensorManager.registerListener(mSensorEventListener, mSensor, SensorManager.SENSOR_DELAY_NORMAL);

if (!isRegister) {

throw new UnsupportedOperationException("设备不支持");

}

}

private SensorEventListener mSensorEventListener = new SensorEventListener() {

@Override

public void onSensorChanged(SensorEvent sensorEvent) {

float proximity=sensorEvent.values[0];

Log.d("近距离", String.valueOf(proximity));

}

@Override

public void onAccuracyChanged(Sensor sensor, int i) {

}

};

@Override

protected void onDestroy() {

super.onDestroy();

mSensorManager.unregisterListener(mSensorEventListener);

}

}