Google Maps APIv2 Authentication failure
android, authentication, google-maps, key
Solution
Hi I was just having this exact same problem. I tried everything the docs said but nothing seemed to work.
The only thing that worked for me was uninstalling and reinstalling my application (not even rebooting worked) because apparently if you make one mistake on the configuration the system caches the failed authentication and your maps won't work even after fixing your configuration.
So try following the docs and guides on configuring Google Maps Api on Android but every time you change something on your configuration uninstall and reinstall.
Problem
The error: ``` 08-15 12:59:17.435: E/Google Maps Android API(14665): Failed to load map. Error contacting Google servers. This is probably an authentication issue (but could be due to network errors). ``` The Google Console: The manifest: ``` <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.cefetmgrdctcc.sgtp" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="18" /> <permission android:name="com.cefetmgrdctcc.sgtp.permission.MAPS_RECEIVE" android:protectionLevel="signature"/> <uses-permission android:name="com.cefetmgrdctcc.sgtp.permission.MAPS_RECEIVE"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> <uses-feature android:glEsVersion="0x00020000" android:required="true"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="Hidden key"/> <activity android:name="com.cefetmgrdctcc.sgtp.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> ``` The layout of the map control: ``` <fragment android:id="@+id/googlemap" android:layout_width="match_parent" android:layout_height="match_parent" class="com.google.android.gms.maps.SupportMapFragment" /> ``` I've imported the Google Play Services into my project and marked on the Google API Console Services list "Google Maps API v2", "Google Maps API v3" and "Google Maps Android API v2", however it seems my Map Fragment is still not being able to authenticate. Map Fragment is just a blank grey square on the middle of the screen, any ideas why is this happening?