App crashes despite handling Android M GPS permission -

i have been using android m model time now, manually revoked permissions location , storage in mobile settings see whether app ask user again permissions @ run time. since then, been crashing. please have @ code-

public class mapsactivity extends fragmentactivity implements com.google.android.gms.location.locationlistener, googleapiclient.connectioncallbacks, googleapiclient.onconnectionfailedlistener {       string[] perms={"android.permission.access_fine_location","android.permission.write_external_storage"};     int permsrequestcode = 200;        @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         mgeofences = new arraylist<geofence>();         mgeofencecoordinates = new arraylist<latlng>(); //        double string0=prefencesettings.getstring("latlng0", "34");          setcontentview(r.layout.activity_maps);         showhelpforfirstlaunch();         supportmapfragment supportmapfragment =                 (supportmapfragment) getsupportfragmentmanager().findfragmentbyid(r.id.googlemap);         locationmanager locationmanager = (locationmanager) getsystemservice(service.location_service);         // getting gps status         boolean isgpsenabled = locationmanager.isproviderenabled(locationmanager.gps_provider);         if(!isgpsenabled)         {             utils.displaypromptforenablinggps(this);         }         log.i("my activity", "gps is" + isgpsenabled);          // getting network status         boolean isnetworkenabled = locationmanager                 .isproviderenabled(locationmanager.network_provider);         log.i("my activity", "network is" + isnetworkenabled);          criteria crta = new criteria();         if (build.version.sdk_int > build.version_codes.gingerbread) {             crta.setaccuracy(criteria.accuracy_fine);         } else {             crta.setaccuracy(criteria.accuracy_medium);         }         /**          * have used .setaccuracy fine higher sdks gingerbread .gingerbread used reference because in apks lower          * gingerbread there poor geo-fencing, gingerbread google made lot easier location services used devleopers.          * had improved set of tools location services, included geofencing , substantially improved location discovery.          */         crta.setpowerrequirement(criteria.power_low);         string provider = locationmanager.getbestprovider(crta, true);          /**          * request location updates after every 5 sec or if user traveled 10m          */         log.i("my activity", "manager " + locationmanager);         log.i("my activity", "provider " + provider);         if (build.version.sdk_int >= build.version_codes.m) {             if (activitycompat.checkselfpermission(this, manifest.permission.access_fine_location) != packagemanager.permission_granted && activitycompat.checkselfpermission(this, manifest.permission.access_coarse_location) != packagemanager.permission_granted) {                  requestpermissions(perms, permsrequestcode);                 // here request missing permissions, , overriding                 //   public void onrequestpermissionsresult(int requestcode, string[] permissions,                 //                                          int[] grantresults)                 // handle case user grants permission. see documentation                 // activity#requestpermissions more details.                 return;             }         }         if (mgoogleapiclient == null) {             mgoogleapiclient = new googleapiclient.builder(this)                     .addconnectioncallbacks((googleapiclient.connectioncallbacks) this)                     .addonconnectionfailedlistener((googleapiclient.onconnectionfailedlistener) this)                     .addapi(locationservices.api)                     .build();             mgoogleapiclient.connect();             log.i("api is", "" + mgoogleapiclient);         }         mlocationrequest = new locationrequest();         // want location update every 10 seconds.         mlocationrequest.setinterval(10000);         // want location accurate possible.         mlocationrequest.setpriority(locationrequest.priority_high_accuracy);        }       public void onrequestpermissionsresult(int permsrequestcode, string[] permissions, int[] grantresults){          switch(permsrequestcode){              case 200:                  boolean gpsaccepted = grantresults[0]==packagemanager.permission_granted;                 toast.maketext(this,"thanks permission",toast.length_short).show();                 boolean memoryaccepted = grantresults[1]==packagemanager.permission_granted;                  break;          }      }      @override     public void onlocationchanged(location location) {         latitude=location.getlatitude();         longitude=location.getlongitude();         cameraposition init =                 new cameraposition.builder()                         .target(new latlng(latitude, longitude))                         .zoom(17.5f)                         .bearing(300f) // orientation                         .tilt(50f) // viewing angle                         .build();         // use googglemap mmap move camera position         googlemap.animatecamera(cameraupdatefactory.newcameraposition(init));     }      @override     protected void onstart() {          super.onstart();         mgoogleapiclient.connect();     }      @override     protected void onstop() {          super.onstop();         mgoogleapiclient.disconnect();      }       public void add(view view) {          if (request < 3) {             string[] arguments = new string[]{string.valueof(request)};             contentvalues values = new contentvalues();             values.put("latitude", latitude);             values.put("true","1");             values.put("longitude", longitude);             db.update("coordinates", values, "id=?", arguments);              mgeofencecoordinates.add(new latlng(latitude, longitude));             log.i("the id is", "" + valueindex);             mgeofences.add(new geofence.builder()                     // coordinates of center of geofence , radius in meters.                     .setrequestid("" + valueindex)                     .setcircularregion(latitude, longitude, 100)                     .setexpirationduration(geofence.never_expire)                             // required when use transition type of geofence_transition_dwell                     .setloiteringdelay(50000)                     .settransitiontypes(                             geofence.geofence_transition_enter                                     | geofence.geofence_transition_dwell                                     | geofence.geofence_transition_exit).build());             mgeofencestore = new geofencestore(this, mgeofences);             valueindex++;             request++;                 googlemap.addmarker(new markeroptions().snippet("radius:100m").draggable(false).title(valueindex + "").position(new latlng(latitude, longitude))).showinfowindow();         } else {             toast.maketext(this, "maximum limit exceeded", toast.length_long).show();         }     }      @override     public void onconnected(bundle bundle) {         location mlastlocation;         if (build.version.sdk_int >= build.version_codes.m) {             if (checkselfpermission(manifest.permission.access_fine_location) != packagemanager.permission_granted && checkselfpermission(manifest.permission.access_coarse_location) != packagemanager.permission_granted) {                 requestpermissions(perms, permsrequestcode);                   return;             }         }         mlastlocation = locationservices.fusedlocationapi.getlastlocation(                 mgoogleapiclient);         startlocationupdates();         if (mlastlocation != null) {             log.i("the last location:", "" + mlastlocation); //            toast.maketext(this, "get last location first asshole!", toast.length_long).show();         }       }       protected void startlocationupdates() {         if (build.version.sdk_int >= build.version_codes.m) {             if (checkselfpermission(manifest.permission.access_fine_location) != packagemanager.permission_granted && checkselfpermission(manifest.permission.access_coarse_location) != packagemanager.permission_granted) {                 requestpermissions(perms, permsrequestcode);                  return;             }             locationrequest mlocationrequest = new locationrequest();              locationservices.fusedlocationapi.requestlocationupdates(                     mgoogleapiclient, mlocationrequest, this);         }     }         } 

please me out been searching days now! manifest file fine user permission included

your error in line:

   string[] perms={"android.permission.access_fine_location","android.permission.write_external_storage"}; 

change

   string[] perms={"android.permission.access_fine_location","android.permission.access_coarse_location"};