android - why Can't I see the map -

i want run demo google map not showing map. here code.i have checked api key correct

package com.example.googlemaps; import com.google.android.maps.mapactivity; import android.os.bundle; import android.view.menu;  public class mainactivity extends mapactivity{      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);     }      @override     protected boolean isroutedisplayed() {         // todo auto-generated method stub         return true;     }  }  

manifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.example.googlemaps"     android:versioncode="1"     android:versionname="1.0" >      <uses-sdk android:minsdkversion="8"/>     <uses-permission android:name="android.permission.internet" />      <application         android:allowbackup="true"         android:icon="@drawable/ic_launcher"         android:label="@string/app_name"         android:theme="@style/apptheme" >         <uses-library android:name="com.google.android.maps" />         <activity             android:name="com.androidhive.googlemaps.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> 

layout xml

<?xml version="1.0" encoding="utf-8"?> <com.google.android.maps.mapview     xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/mapview"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:clickable="true"     android:apikey="@string/api_key" /> 

this old way getting map. google has updated now. use

<fragment             android:id="@+id/map"             android:layout_width="fill_parent"             android:layout_height="fill_parent"             class="com.google.android.gms.maps.supportmapfragment" /> 

in xml layout.

provide api key in manifest file

<meta-data             android:name="com.google.android.maps.v2.api_key"             android:value="your-api-key" /> 

in application tag.

also don't extend mapactivity. instead extend normal activity

then write below code in oncreate

int status = googleplayservicesutil                 .isgoogleplayservicesavailable(getbasecontext());      if (status != connectionresult.success) {         // google play services not available          int requestcode = 10;         dialog dialog = googleplayservicesutil.geterrordialog(status, this,                 requestcode);         dialog.show();      } else {         // google play services available          // getting reference supportmapfragment         supportmapfragment fragment = (supportmapfragment) getsupportfragmentmanager()                 .findfragmentbyid(r.id.map);          // getting google map         mymap = fragment.getmap();          // enabling mylocation in google map         mymap.setmylocationenabled(true);          // getting locationmanager object system service         // location_service         locationmanager locationmanager = (locationmanager) getsystemservice(location_service);          // creating criteria object retrieve provider         criteria criteria = new criteria();          // getting name of best provider         string provider = locationmanager.getbestprovider(criteria, true);          // getting current location gps         location location = locationmanager.getlastknownlocation(provider);          if (location != null) {             onlocationchanged(location);         }          locationmanager.requestlocationupdates(provider, 20000, 0, this);     } 

also add following code on onresume

int resultcode = googleplayservicesutil                 .isgoogleplayservicesavailable(getapplicationcontext());      if (resultcode == connectionresult.success) {      } else {         googleplayservicesutil.geterrordialog(resultcode, this,                 rqs_googleplayservices);     } 

that's it. best!