android - Reading LightSensor from LG P990 -

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i trying develop light sensor app lg p990 detect laser (don't ask why).

the code looks this:

package soma.de.light;  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.view.view; import android.view.view.onclicklistener; import android.widget.button; import android.widget.textview;  public class lightsensoractivity extends activity {   sensormanager mysensormanager;  sensor mylightsensor;  textview textlightsensordata;  textview textlightsensor;  button start;   public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);    setcontentview(r.layout.main);    textlightsensor = (textview)findviewbyid(r.id.tvlight);    textlightsensordata = (textview)findviewbyid(r.id.tvacc);     mysensormanager = (sensormanager)getsystemservice(context.sensor_service);    mylightsensor = mysensormanager.getdefaultsensor(sensor.type_light);     start = (button)findviewbyid(r.id.btstart);    start.setonclicklistener(btlistener);         if (mylightsensor == null){     textlightsensor.settext("no light sensor!"); //this get!    }else{     textlightsensor.settext(mylightsensor.getname() + "\n " + mylightsensor.getresolution()  );      mysensormanager.registerlistener(lightsensoreventlistener,       mylightsensor,       sensormanager.sensor_delay_normal);    } }  private onclicklistener btlistener = new onclicklistener() { public void onclick(view v){                      mylightsensor = mysensormanager.getdefaultsensor(sensor.type_light);         if (mylightsensor == null){         textlightsensor.settext("no light sensor!");        }else{         textlightsensor.settext(mylightsensor.getname() + "\n " + mylightsensor.getresolution()      );          mysensormanager.registerlistener(lightsensoreventlistener,           mylightsensor,           sensormanager.sensor_delay_normal);        } } };  sensoreventlistener lightsensoreventlistener  = new sensoreventlistener(){  @override public void onaccuracychanged(sensor arg0, int arg1) {  // todo auto-generated method stub  }  @override public void onsensorchanged(sensorevent arg0) {  // todo auto-generated method stub  if(arg0.sensor.gettype()==sensor.type_light){  textlightsensordata.settext("light sensor date:"    + string.valueof(arg0.values[0])); }else if(arg0.sensor.gettype()==sensor.type_proximity){  textlightsensordata.settext("test "    + string.valueof(arg0.values[0]) +" " +  string.valueof(arg0.values[1])); } }}; }

but "no light sensor" return on activity. lg p990 have one. in "hidden menu" can see values of light sensor in alc / proximity test.

do have change in code run?

not sure getdefaultsensor(), documentation says:

    note returned sensor composite sensor,     , data averaged or filtered. if need access     raw sensors, use getsensorlist()

this how i'm doing it:

    sensormanager sm = (sensormanager) getsystemservice(context.sensor_service);      // check if there @ least 1 light sensor     if (sm.getsensorlist(sensor.type_light).size() == 0) {         // no light sensor installed     }     else {         sensor light = sm.getsensorlist(sensor.type_light).get(0);         if (!sm.registerlistener(this, light, sensormanager.sensor_delay_game)) {             // couldn't register light sensor listener         }     }

and in onsensorchanged() method, event.values[0] gives value of light sensor, integer in 0..100 range, if have seen values of 10 , 100 :-)

good luck,


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