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POGoogle MapFragment is blank (white) with Could not find class 'maps.j.k'
 

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  1. POGoogle MapFragment is blank (white) with Could not find class 'maps.j.k'
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    <p>I'm trying to build the official <a href="http://developer.android.com/google/play-services/maps.html" rel="noreferrer">android google map api v2</a> sample on a (gingerbread 2.3.5) phone . I added <code>android-support-v4.jar</code> to official sample project.</p> <p>I took the sample from the official tutorial in <code>&lt;android-sdk&gt;/extras/google-play-services/samples/maps</code> </p> <p>I copied the sample app in Eclipse, reference the <code>google-play-services_lib</code> project as an Android library, and build the whole thing with the Android SDK 4.1.2 (api 16).</p> <p>Unfortunately, ahen I launch the app the map is blank and I don't have any exception or message. The only thing I got are those suspicious lines in the logcat : </p> <pre><code> Unable to resolve superclass of Lmaps/a/du; (411) Link of class 'Lmaps/a/du;' failed Unable to resolve superclass of Lmaps/a/ej; (2363) Link of class 'Lmaps/a/ej;' failed Unable to resolve superclass of Lmaps/j/k; (2379) Link of class 'Lmaps/j/k;' failed </code></pre> <p>ERR Could not find class 'maps.j.k', referenced from method maps.y.ae.a<br> VFY: unable to resolve new-instance 3571 (Lmaps/j/k;) in Lmaps/y/ae; </p> <p>I suspect that my project structure in eclipse 3.8 is somewhat messed up.</p> <p>I tried the following things (even the most idiotic) to no avail.</p> <h2>1. Invalid api key ?</h2> <p>I generated a "debug.keystore" with keytool and updated the eclipse preference (Android/Build/Keystore). Of course, I registered that new keystore/SHA1 and get a new api key that I used in the AndroidManifest file</p> <h2>2. Wrong project target ?</h2> <p>I tried to build my two projects with the following targets : </p> <ul> <li>Android 4.2.1</li> <li>Google Api 4.2.1</li> </ul> <h2>3. adding google-play-services_lib as a project dependency</h2> <p>I tried to add google-play-services_lib as a project dependency on top of being added as an android library in the demo build path. And tick the matching export checkbox. </p> <h2>4. test google maps api v2 on the phone</h2> <p>I downloaded <a href="https://play.google.com/store/apps/details?id=com.trulia.android" rel="noreferrer">trulia real estate</a> app that is said to use the v2 api on the phone to be sure that the phone is compatible with the new api </p> <p>Here is the manifest for the sample app </p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.mapdemo" android:versionCode="1" android:versionName="1.0" &gt; &lt;permission android:name="com.example.mapdemo.permission.MAPS_RECEIVE" android:protectionLevel="signature" /&gt; &lt;uses-permission android:name="com.example.mapdemo.permission.MAPS_RECEIVE" /&gt; &lt;!-- Copied from Google Maps Library/AndroidManifest.xml. --&gt; &lt;uses-sdk android:minSdkVersion="8" android:targetSdkVersion="16" /&gt; &lt;uses-permission android:name="android.permission.INTERNET" /&gt; &lt;uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /&gt; &lt;!-- External storage for caching. --&gt; &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt; &lt;!-- My Location --&gt; &lt;uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /&gt; &lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /&gt; &lt;!-- Maps API needs OpenGL ES 2.0. --&gt; &lt;uses-feature android:glEsVersion="0x00020000" android:required="true" /&gt; &lt;!-- End of copy. --&gt; &lt;application android:hardwareAccelerated="true" android:icon="@drawable/ic_launcher" android:label="@string/demo_title" &gt; &lt;!-- You must insert your own Google Maps for Android API v2 key in here. --&gt; &lt;meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="XXXXXXXX" /&gt; &lt;activity android:name=".MainActivity" &gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;activity android:name=".BasicMapActivity" android:label="@string/basic_map" /&gt; &lt;activity android:name=".CameraDemoActivity" android:label="@string/camera_demo" /&gt; &lt;activity android:name=".EventsDemoActivity" android:label="@string/events_demo" /&gt; &lt;activity android:name=".GroundOverlayDemoActivity" android:label="@string/groundoverlay_demo" /&gt; &lt;activity android:name=".LayersDemoActivity" android:label="@string/layers_demo" /&gt; &lt;activity android:name=".LocationSourceDemoActivity" android:label="@string/locationsource_demo" /&gt; &lt;activity android:name=".MarkerDemoActivity" android:label="@string/marker_demo" /&gt; &lt;activity android:name=".OptionsDemoActivity" android:label="@string/options_demo" /&gt; &lt;activity android:name=".PolygonDemoActivity" android:label="@string/polygon_demo" /&gt; &lt;activity android:name=".PolylineDemoActivity" android:label="@string/polyline_demo" /&gt; &lt;activity android:name=".ProgrammaticDemoActivity" android:label="@string/programmatic_demo" /&gt; &lt;activity android:name=".TileOverlayDemoActivity" android:label="@string/tile_overlay_demo" /&gt; &lt;activity android:name=".UiSettingsDemoActivity" android:label="@string/uisettings_demo" /&gt; &lt;activity android:name=".RawMapViewDemoActivity" android:label="@string/raw_mapview_demo" /&gt; &lt;activity android:name=".RetainMapActivity" android:label="@string/retain_map" /&gt; &lt;activity android:name=".MultiMapDemoActivity" android:label="@string/multi_map_demo" /&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre> <p>Here are some screenshots of my project structure/build path.</p> <p><img src="https://i.stack.imgur.com/jitf8.png" alt="Project structure"></p> <p><img src="https://i.stack.imgur.com/MGhD8.png" alt="Target and libraries"></p> <p><img src="https://i.stack.imgur.com/lv3jr.png" alt="Build path"></p>
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    1. COdo you have the lib project on dropbox? did you tried to put it on a local folder?
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      1. USOvidiu Latcu
    2. CO@OvidiuLatcu Well, a dropbox folder is a local folder :) Besides, I always shutdown dropbox when I code. And I launch dropbox once, at the end of the day for an online backup of my files.
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    3. COThe "error" messages Unable to resolve superclass of Lmaps/a/du; (411) do not denote errors. Even when the application works fine, you get those messages.
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