android - java.lang.ClassNotFoundException: com.hamweather.aeris.maps.R$layout using Aeris Weather SDK -

i using hamweather aeris andorid sdk, , trying implement map view component. when follow online tutorials, can not render aerismapview, , error:

java.lang.classnotfoundexception: com.hamweather.aeris.maps.r$layout.  

does know coming from/how fix it?

my xml file:

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical" >      <com.hamweather.aeris.maps.aerismapview         android:id="@+id/aerisfragment_map"         android:layout_width="match_parent"         android:layout_height="0dp"         android:layout_weight="1" >     </com.hamweather.aeris.maps.aerismapview>  </linearlayout> 

and activity:

import android.app.activity; import android.app.fragmentmanager; import android.app.fragmenttransaction; import android.content.pm.activityinfo; import android.os.bundle; import android.view.window;  public class mapviewactivity extends activity{  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      setcontentview(r.layout.mapview_activity);      fragmentmanager fragmentmanager = getfragmentmanager();     fragmenttransaction fragmenttransaction = fragmentmanager.begintransaction();     mapfragment fragment = new mapfragment();     fragmenttransaction.add(r.id.frame_container, fragment);     fragmenttransaction.commit(); } } 

finally, fragment:

import android.location.*; import android.os.bundle; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup;  import com.google.android.gms.maps.model.latlng; import com.hamweather.aeris.communication.aeriscallback; import com.hamweather.aeris.communication.endpointtype; import com.hamweather.aeris.location.locationhelper; import com.hamweather.aeris.maps.aerismapview; import com.hamweather.aeris.maps.aerismapview.aerismaptype; import com.hamweather.aeris.maps.mapviewfragment; import com.hamweather.aeris.maps.interfaces.onaerismaplongclicklistener; import com.hamweather.aeris.maps.interfaces.onaerismarkerinfowindowclicklistener; import com.hamweather.aeris.maps.markers.aerismarker; import com.hamweather.aeris.model.aerisresponse; import com.hamweather.aeris.response.earthquakesresponse; import com.hamweather.aeris.response.firesresponse; import com.hamweather.aeris.response.stormcellresponse; import com.hamweather.aeris.response.stormreportsresponse;  public class mapfragment extends mapviewfragment implements onaerismaplongclicklistener, aeriscallback,     onaerismarkerinfowindowclicklistener{  @override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {     view view = inflater.inflate(r.layout.single_tab_site_weather2,             container, false);     mapview = (aerismapview) view.findviewbyid(r.id.aerisfragment_map);     mapview.init(savedinstancestate, aerismaptype.google);     initmap();     sethasoptionsmenu(true);     return view; }  /**  * inits map specific setting  */ private void initmap() {     mapview.movetolocation(new latlng(34.7, -86.7), 9);     mapview.setonaerismaplongclicklistener(this);     mapview.setonaeriswindowclicklistener(this);  }  @override public void onresult(endpointtype endpointtype, aerisresponse aerisresponse) {  }  @override public void onmaplongclick(double v, double v1) {  }  @override public void wildfirewindowpressed(firesresponse firesresponse, aerismarker aerismarker) {  }  @override public void stormcellswindowpressed(stormcellresponse stormcellresponse, aerismarker aerismarker) {  }  @override public void stormreportswindowpressed(stormreportsresponse stormreportsresponse, aerismarker aerismarker) {  }  @override public void earthquakewindowpressed(earthquakesresponse earthquakesresponse, aerismarker aerismarker) {  } } 

also, first q on stack exchange, if failed adhere convention or etiquette, please let me know, , i'll try fix it. thanks.

i managed working. has issue, here steps:

i first switched using jars using gradle dependency. per website, add following build.gradle(the module one)

repositories {     mavencentral() } dependencies {     compile 'com.google.android.gms:play-services:4.4.52'     compile 'com.hamweather:aeris-maps-library:1.0.0@aar' } 

also sure add following, in andorid tag, exists in file:

android {      ...some other stuff...      dexoptions{         predexlibraries = false     } } 

double check have proper api key permissions google maps. works. far can tell, had using compiled jar, not repo version.