hbuilder mui 获取手机是否开启GPS

1. if(plus.os.name=="Android"){   
2.     var context = plus.android.importClass("android.content.Context"); 
3.     var locationManager=plus.android.importClass("android.location.LocationManager"); 
4.     var main=plus.android.runtimeMainActivity(); 
5.     var mainSvr=main.getSystemService(context.LOCATION_SERVICE); 
6.     androidIsOpen=mainSvr.isProviderEnabled(locationManager.GPS_PROVIDER); 
7.     if(androidIsOpen){ 
8.         getposition(); 
9.     } 
10.     else{ 
11.         mui.toast("请手动开启GPS"); 
12.         setTimeout(function(){ 
13.             mui.back();  
14.         },1000); 
15.          
16.     } 
17.     //console.log("android:"+mainSvr.isProviderEnabled(locationManager.GPS_PROVIDER)); 
18. }