Android传感器——方向传感器TYPE_ORIENTATION

Sensor.TYPE_ORIENTATION:

All values are angles in degrees.

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

values[1]: Pitch, rotation around x-axis (-180 to 180), with positive values when the z-axis moves toward the y-axis.

values[2]: Roll, rotation around y-axis (-90 to 90), with positive values when the x-axis moves toward the z-axis.

Note: This definition is different from yaw, pitch and roll used in aviation where the X axis is along the long side of the plane (tail to nose).

Note: This sensor type exists for legacy reasons, please use getRotationMatrix() in conjunction with remapCoordinateSystem() and getOrientation() to compute these values instead.

Important note: For historical reasons the roll angle is positive in the clockwise direction (mathematically speaking, it should be positive in the counter-clockwise direction).

由图可以知道values[0]是绕Yaw轴旋转得到的值，values[1]是绕Pitch轴旋转得到的值，values[2]是绕Roll轴旋转得到的值。

例程如下：

OrientationSensorDemoActivity.java代码:

package com.lau.orientation;

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.os.Bundle;
import android.widget.TextView;

public class OrientationSensorDemoActivity extends Activity implements SensorEventListener {
	
	private SensorManager sensorManager = null;
	private boolean mRegister = false;
	private Sensor sensor = null;
	
	private TextView tvAzimuth = null;
	private TextView tvPitch = null;
	private TextView tvRoll = null;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        tvAzimuth = (TextView) findViewById(R.id.azimuth);
        tvPitch = (TextView) findViewById(R.id.pitch);
        tvRoll = (TextView) findViewById(R.id.roll);
        
        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
        
        
    }
	
	@Override
	protected void onPause() {
		// TODO Auto-generated method stub
		super.onPause();
		if(mRegister) {
			sensorManager.unregisterListener(this);
		}
	}

	@Override
	protected void onResume() {
		// TODO Auto-generated method stub
		super.onResume();
		mRegister = sensorManager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_NORMAL);
	}

	@Override
	public void onAccuracyChanged(Sensor sensor, int accuracy) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onSensorChanged(SensorEvent event) {
		// TODO Auto-generated method stub
		tvAzimuth.setText("Azimuth 方位角: " + event.values[0] + "\n(0 - 359) 0=North, 90=East, 180=South, 270=West");
		tvPitch.setText("Pitch 倾斜角: " + event.values[1] + "\n(-180 to 180)");
		tvRoll.setText("Roll 旋转角: " + event.values[2] + "\n(-90 to 90)");
	}
    
}

 

 

布局文件main.xml:

 

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