Haifeng Zhang Haifeng Zhang - 3 months ago 45
Android Question

Cannot create Cluster Manager instance( using Google Maps Android API Utility Library)

Update:(Problem solved)
FInally it is working in my Intellij Idea 13

The problem is that the library was not imported correctly.
Go Project Structure, select Modules, add the library as module from an existing source,
then click it, it will show Android and check it as Library Module, then it would work

enter image description here
enter image description here

Im using

Google Maps Android API Utility Library
in my app. If i create a GoogleMap instance and move camera to specific location, it works! Code can be found below.

Unfortunately if I invoke
mClusterManager = new ClusterManager<MyItem>(this, mMap);
and add items to it, the app will crash. Can anyone help? What is going on here?

public class MapActivity extends FragmentActivity{

private GoogleMap mMap;
private ClusterManager<MyItem> mClusterManager;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map);
setUpMapIfNeeded();
}

@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}

private void setUpMapIfNeeded() {
if (mMap != null) {
return;
}
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
if (mMap != null) {
//if comment out mCLusterManager instantiation, the app works and show the map
//mClusterManager = new ClusterManager<MyItem>(this, mMap);

mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(51.5, -0.35), 9));
}
}
}


Below is the map.xml (got it from https://github.com/googlemaps/android-maps-utils)

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.google.android.gms.maps.SupportMapFragment"/>


Errors in logcat:

10-02 18:13:08.667 2854-2854/your.androidclient E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NoClassDefFoundError: com.google.maps.android.clustering.ClusterManager
at your.androidclient.AndroidClientActivity.setUpMapIfNeeded(AndroidClientActivity.java:115)
at your.androidclient.AndroidClientActivity.onCreate(AndroidClientActivity.java:99)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)

Answer

The LogCat states

java.lang.NoClassDefFoundError: com.google.maps.android.clustering.ClusterManager

This means that the maps-utils-library is not added to your final APK. Did you add it as a library (Project properties > Android > Library)?