The Compass for Android sensor development

The code is very simple, mainly some common sensor monitoring, the compass is very useful.

Layout code

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "android:orientation=" vertical "android:layout_width=" fill_parent "android:layout_height=" Fill_parent " Android:background= "#fff" ><imageviewandroid:id= "@+id/znzimage" android:layout_width= "Fill_parent" Android: layout_height= "Fill_parent" android:scaletype= "Fitcenter" android:src= "@drawable/compass"/></linearlayout >

Program code:

Package Zhinanzheng.com;import Android.app.activity;import Android.hardware.sensor;import Android.hardware.sensorevent;import Android.hardware.sensoreventlistener;import Android.hardware.SensorManager; Import Android.os.bundle;import Android.view.animation.animation;import android.view.animation.RotateAnimation; Import android.widget.imageview;/** * @author Coderwry [email protected] * @version 1.0 */public class Zhinanzheng E  Xtends Activity implements Sensoreventlistener{imageview image; Compass Picture float currentdegree = 0f; Compass picture turned angle sensormanager msensormanager; Manager/** Called when the activity is first created.        */@Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);                Setcontentview (R.layout.main);        Image = (ImageView) Findviewbyid (r.id.znzimage); Msensormanager = (Sensormanager) getsystemservice (Sensor_service);  Get Management Service} @Override protected void Onresume () {super.onresume ();  Register Listener Msensormanager.registerlistener (this, msensormanager.getdefaultsensor (sensor.type_orientation), SensorMan Ager.    Sensor_delay_game);    }//unregister @Override protected void OnPause () {Msensormanager.unregisterlistener (this);        Super.onpause ();    } @Override protected void OnStop () {Msensormanager.unregisterlistener (this);        Super.onstop (); }//sensor value changed @overridepublic void onaccuracychanged (sensor sensor, int accuracy) {//TODO auto-generated method stub}/ /accuracy Change @overridepublic void onsensorchanged (Sensorevent event) {//TODO auto-generated method stub//get sensor type to trigger event int SensorType = Event.sensor.getType (); switch (sensortype) {case Sensor.TYPE_ORIENTATION:float degree = event.values[0]; /Get z-turn angle//wear pieces rotate animation rotateanimation ra = new Rotateanimation (currentdegree,-degree,animation.relative_to_self,0.5f, animation.relative_to_self,0.5f); Ra.setduration (100);//Animation duration image.startanimation (RA); Currentdegree =-degree; Break;}}}

The Compass for Android sensor development