Google Map does not display in Android -not display map except boxes and zooming button -

i have developed android app using google maps api. created , used api key, map not shown/visible expected. grey color title & zoom button show/visible.

i followed link

my application unsigned application.

this map file location(package) available in com.xont.hema6.controller.sale main package com.xont.hema6.controller . 1 needs specified key?

my code :

   public class retailermapactivity extends fragmentactivity{ googlemap map; arraylist<latlng> markerpoints;  protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);     markerpoints = new arraylist<latlng>();     supportmapfragment fm = (supportmapfragment)getsupportfragmentmanager().findfragmentbyid(r.id.map);     map = fm.getmap();  } 

this xml

  <relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".sale.retailermapactivity" >     <fragment      android:id="@+id/map"     android:layout_width="wrap_content"     android:layout_height="wrap_content"             class="com.google.android.gms.maps.supportmapfragment" />    

androidmainfest file permission

<uses-feature android:glesversion="0x00020000" android:required="true"/> <permission  android:name="com.xont.hema6.controller.sale.permission.maps_receive"  android:protectionlevel="signature" /> <uses-permission android:name="com.xont.hema6.controller.sale.permission.maps_receive" /> <uses-permission android:name="com.google.android.providers.gsf.permission.read_gservices"/> <uses-permission android:name="android.permission.access_network_state"/> <uses-permission android:name="android.permission.access_wifi_state"/> <uses-permission android:name="android.permission.internet" />  <uses-permission android:name="android.permission.access_fine_location" /> <uses-permission android:name="android.permission.read_phone_state" /> <uses-permission android:name="android.permission.access_coarse_location" /> <uses-permission android:name="android.permission.access_gps"></uses-permission>   <uses-permission android:name="android.permission.access_wifi_state" /> 

inside application

<meta-data android:name="com.google.android.maps.v2.api_key"    android:value="aiza**cd3c**jop27sh_esgtr7ul***w_g3ps7o"/> 

http://wptrafficanalyzer.in/blog/drawing-driving-route-directions-between-two-locations-using-google-directions-in-google-map-android-api-v2/

please suggest wrong in code.

go manifest file see package name use package name must create google maps api v2 key , use

ex:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.venky.loadgooglemapsdemo"     android:versioncode="1"     android:versionname="1.0" > 

my package name "com.venky.loadgooglemapsdemo"

if want tutorial , demo please see link