About the use of the Android orientation sensor

After Android2.2, orientation sensors was deprecated.

The official proposal is to use acceleration and magnetic sensor to calculate

On this question, csdn on a very good blog post.

http://blog.csdn.net/flowingflying/article/details/43233315

On stack Overflow:

Http://stackoverflow.com/questions/10291322/what-is-the-alternative-to-android-orientation-sensor

Use the words to see the code directly

 Packagecom.turtle920.androidaudioprocess;Importandroid.app.Activity;ImportAndroid.hardware.Sensor;Importandroid.hardware.SensorEvent;ImportAndroid.hardware.SensorEventListener;ImportAndroid.hardware.SensorManager;ImportAndroid.os.Bundle;ImportAndroid.util.Log;ImportAndroid.view.Menu;ImportAndroid.widget.TextView;//implement sensor Event monitoring: Sensoreventlistener Public classMainactivityextendsActivityImplementssensoreventlistener{PrivateSensormanager Sensormanager; PrivateSensor Acc_sensor; PrivateSensor Mag_sensor; //Acceleration Sensor Data    floataccvalues[]=New float[3]; //Geomagnetic sensor data    floatmagvalues[]=New float[3]; //rotation matrix to hold the data of the magnetic field and acceleration    floatr[]=New float[9]; //data for the analog direction sensor (the original data is in radians)    floatvalues[]=New float[3]; intCounter=0; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Sensormanager=(Sensormanager) Getsystemservice (Sensor_service); Acc_sensor=sensormanager.getdefaultsensor (Sensor.type_accelerometer); Mag_sensor=sensormanager.getdefaultsensor (Sensor.type_magnetic_field); //registering the sensor for monitoring:Sensormanager.registerlistener ( This, Acc_sensor, sensormanager.sensor_delay_normal); Sensormanager.registerlistener ( This, Mag_sensor, sensormanager.sensor_delay_normal); }    //callback method when the sensor state changes@Override Public voidonsensorchanged (Sensorevent event) {if(Event.sensor.getType () = =sensor.type_accelerometer) {Accvalues=event.values; }        Else if(Event.sensor.getType () = =Sensor.type_magnetic_field) {Magvalues=event.values; }        /**Public Static Boolean Getrotationmatrix (float[] r, float[] I, float[] gravity, float[] geomagnetic) * Fill rotation array R * r: Rotating array to fill * I: convert magnetic field data into actual gravity coordinates can be set to NULL by default * Gravity: Accelerometer data * Geomagnetic: Geomagnetic sensor Data*/Sensormanager.getrotationmatrix (R,NULL, Accvalues, magvalues); /*** public static float[] Getorientation (float[] r, float[] values) * R: Rotating Array * Values: Analog direction sensor of data*/sensormanager.getorientation (R, values); if(counter++% 10==1) {LOG.E ("DEBUG", "x:" +math.todegrees (Values[0]) + "Y:" +math.todegrees (values[1]) + "Z:" +math.todegrees (values[2])); }} @Override Public voidOnaccuracychanged (sensor sensor,intaccuracy) {    }}

The output of x, Y, z three values is the rotation angle of the phone along this axis

One of the things to be aware of in this place is that the magnetic force of the MacBook's screen-opening magnets will affect the magnetic sensor ... Be careful when you debug.

About the use of the Android orientation sensor