package org.itheima62.sensor;



import java.util.List;



import android.os.Bundle;

import android.app.Activity;

import android.content.Context;

import android.hardware.Sensor;

import android.hardware.SensorEvent;

import android.hardware.SensorEventListener;

import android.hardware.SensorManager;

import android.view.Menu;



public class MainActivity extends Activity {



	private SensorManager manager;

	private Sensor sensor;

	private SensorEventListener listener = new SensorEventListener() {



		@Override

		public void onSensorChanged(SensorEvent event) {

			// 1. 获取 传感器的数据

			float[] values = event.values;



			// value

			// values[0]: Azimuth, angle between the magnetic north direction

			// and the y-axis, around the z-axis (0 to 359). 0=North, 90=East,

			// 180=South, 270=West



			float angle = values[0];

			if (angle == 0) {

				System.out.println("北");

			} else if (angle == 90) {

				System.out.println("东");

			} else if (angle == 180) {

				System.out.println("南");

			} else if (angle == 270) {

				System.out.println("西");

			} else if (angle > 0 && angle < 90) {

				System.out.println("东北");

			} else if (angle > 90 && angle < 180) {

				System.out.println("东南");

			} else if (angle > 180 && angle < 270) {

				System.out.println("西南");

			} else if (angle > 270 && angle < 360) {

				System.out.println("西北");

			}



		}



		@Override

		public void onAccuracyChanged(Sensor sensor, int accuracy) {

			// 1. 传感器的精确度发送改变时



		}

	};



	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);



		// 传感器的管理者



		manager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);



		// List<Sensor> list = manager.getSensorList(Sensor.TYPE_ALL);

		// for (Sensor sensor : list) {

		// System.out.println(sensor.getName());

		// }



		// 获得光的传感器



		sensor = manager.getDefaultSensor(Sensor.TYPE_ORIENTATION);



	}



	@Override

	protected void onResume() {

		super.onResume();



		// 1:监听传感器

		// 2:哪个传感器

		// 3:采样频率

		manager.registerListener(listener, sensor,

				SensorManager.SENSOR_DELAY_NORMAL);

	}



	@Override

	protected void onPause() {

		super.onPause();



		manager.unregisterListener(listener);

	}

}