Android Map is plain white screen - no errors -

xml (activity_maptest.xml):

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

java (maptest.java):

package com.example.app;  import android.app.activity; import android.os.bundle;  public class maptest extends activity {      public class mapactivity extends activity {          @override         protected void oncreate(bundle savedinstancestate) {             super.oncreate(savedinstancestate);             setcontentview(r.layout.activity_maptest);         }     }  } 

manifest:

<uses-feature         android:glesversion="0x00020000"         android:required="true" />     .     .     .     <uses-permission android:name="android.permission.internet" />     <uses-permission android:name="android.permission.access_network_state" />     <uses-permission android:name="android.permission.write_external_storage" />     <uses-permission android:name="android.permission.access_coarse_location" />     <uses-permission android:name="android.permission.access_fine_location" />     <uses-permission android:name="android.permission.call_phone" /> <application         android:allowbackup="true"         android:icon="@drawable/icon_launcher"         android:label="@string/app_name"         android:theme="@style/theme.appcompat.light.darkactionbar" >         .         .         .         <activity             android:name="com.example.app.maptest"             android:label="@string/title_activity_maptest" >         </activity>          <meta-data             android:name="com.google.android.maps.v2.api_key"             android:value="my actual key" />     </application> 

when page loaded in page white , there no errors logcat. following google guide: https://developers.google.com/maps/documentation/android/start, appears did wrong?

you have activity inside activity. try removing 1 of them