how to create Google map in android -

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i new in android.i need create google map.i try create google map in emulator drive

android-sdk-windows\add-ons\addon-google_apis-google-16\samples\mapsdemo

1) added map,effect , usbs jar file in libs folder.
2) added permission 

<uses-permission android:name="android.permission.access_coarse_location" />     <uses-permission android:name="android.permission.internet" />

but come error code
error: 

04-25 18:00:00.857: e/androidruntime(2339): fatal exception: main 04-25 18:00:00.857: e/androidruntime(2339): java.lang.runtimeexception: unable start activity componentinfo{com.example.androidmap/com.example.androidmap.mainactivity}: android.content.activitynotfoundexception: unable find explicit activity class {com.example.androidmap/com.example.androidmap.mapsdemo}; have declared activity in androidmanifest.xml? 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activitythread.performlaunchactivity(activitythread.java:2059) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activitythread.handlelaunchactivity(activitythread.java:2084) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activitythread.access$600(activitythread.java:130) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activitythread$h.handlemessage(activitythread.java:1195) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.os.handler.dispatchmessage(handler.java:99) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.os.looper.loop(looper.java:137) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activitythread.main(activitythread.java:4745) 04-25 18:00:00.857: e/androidruntime(2339):     @ java.lang.reflect.method.invokenative(native method) 04-25 18:00:00.857: e/androidruntime(2339):     @ java.lang.reflect.method.invoke(method.java:511) 04-25 18:00:00.857: e/androidruntime(2339):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:786) 04-25 18:00:00.857: e/androidruntime(2339):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:553) 04-25 18:00:00.857: e/androidruntime(2339):     @ dalvik.system.nativestart.main(native method) 04-25 18:00:00.857: e/androidruntime(2339): caused by: android.content.activitynotfoundexception: unable find explicit activity class {com.example.androidmap/com.example.androidmap.mapsdemo}; have declared activity in androidmanifest.xml? 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.instrumentation.checkstartactivityresult(instrumentation.java:1541) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.instrumentation.execstartactivity(instrumentation.java:1416) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activity.startactivityforresult(activity.java:3351) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activity.startactivityforresult(activity.java:3312) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activity.startactivity(activity.java:3522) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activity.startactivity(activity.java:3490) 04-25 18:00:00.857: e/androidruntime(2339):     @ com.example.androidmap.mainactivity.oncreate(mainactivity.java:14) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activity.performcreate(activity.java:5008) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1079) 04-25 18:00:00.857: e/androidruntime(2339):     @ android.app.activitythread.performlaunchactivity(activitythread.java:2023) 04-25 18:00:00.857: e/androidruntime(2339):     ... 11 more

edit: 

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.example.androidmap"     android:versioncode="1"     android:versionname="1.0" >     <uses-sdk         android:minsdkversion="8"         android:targetsdkversion="17" />    <uses-permission android:name="android.permission.access_coarse_location" />     <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.example.androidmap.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>         <activity android:name="com.example.android.apis.mapsdemo" android:label="mapsdemo"/>        <activity android:name="com.example.android.apis.view.mapviewdemo" android:label="mapview"/>        <activity android:name="com.example.android.apis.view.mapviewcompassdemo" android:label="mapview , compass"/>            </application> </manifest>

please me.

you need extend class mapactivity , make sure have declare in menifest.xml file or follow link google maps


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