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

问题

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

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)

回答1:

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)?

回答2:

The docs tell you to use:

compile 'com.google.maps.android:android-maps-utils:0.4+'

Using this will give the error. You must use android-maps-utils:0.4.2

compile 'com.google.maps.android:android-maps-utils:0.4.2'

This will get rid of the error.

note: i posted in another answer to use 0.3+, although 0.4.2 is obviously better. Either way, 0.4+ doesn't work and the others do

回答3:

Edit your play services with bellow :

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.google.android.gms:play-services-maps:9.2.1'
    compile 'com.google.android.gms:play-services-places:9.2.1'
    compile 'com.google.maps.android:android-maps-utils:0.4+'
}

来源：https://stackoverflow.com/questions/26165285/cannot-create-cluster-manager-instance-using-google-maps-android-api-utility-li