I am following android tutorials from mybringback site. I've followed correctly but I've got an error and I don't understand why:

```
public class Main extends MapActivity {

    MapView map;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        map = (MapView) findViewById(R.id.mvMain);
    }

    @Override
    protected boolean isRouteDisplayed() {
        // TODO Auto-generated method stub
        return false;
    }
}

```

logCat:

> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): FATAL EXCEPTION: main
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): Process:
>  com.prashant.maps, PID: 1483
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483):
>  java.lang.RuntimeException: Unable to start activity
>  ComponentInfo{com.prashant.maps/com.prashant.maps.Main}:
>  android.view.InflateException: Binary XML file line #7: Error
>  inflating class com.google.android.maps.Mapview
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.app.ActivityThread.access$800(ActivityThread.java:144)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.os.Handler.dispatchMessage(Handler.java:102)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.os.Looper.loop(Looper.java:135)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.app.ActivityThread.main(ActivityThread.java:5221)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  java.lang.reflect.Method.invoke(Native Method)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  java.lang.reflect.Method.invoke(Method.java:372)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): Caused by:
>  android.view.InflateException: Binary XML file line #7: Error
>  inflating class com.google.android.maps.Mapview
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:757)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.view.LayoutInflater.inflate(LayoutInflater.java:504)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.view.LayoutInflater.inflate(LayoutInflater.java:414)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.view.LayoutInflater.inflate(LayoutInflater.java:365)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:377)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.app.Activity.setContentView(Activity.java:2144)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  com.prashant.maps.Main.onCreate(Main.java:15)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.app.Activity.performCreate(Activity.java:5933)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): ... 10 more
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): Caused by:
>  java.lang.ClassNotFoundException: Didn't find class
>  "com.google.android.maps.Mapview" on path: DexPathList[[zip file
>  "/system/framework/com.google.android.maps.jar", zip file
>  "/data/app/com.prashant.maps-2/base.apk"],nativeLibraryDirectories=[/vendor/lib,
>  /system/lib]]
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  java.lang.ClassLoader.loadClass(ClassLoader.java:511)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  java.lang.ClassLoader.loadClass(ClassLoader.java:469)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.view.LayoutInflater.createView(LayoutInflater.java:571)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): ... 20 more
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): Suppressed:
>  java.lang.ClassNotFoundException: com.google.android.maps.Mapview
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  java.lang.Class.classForName(Native Method)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  java.lang.BootClassLoader.findClass(ClassLoader.java:781)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): at
>  java.lang.ClassLoader.loadClass(ClassLoader.java:504)
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): ... 23 more
> 
> 
> 02-24 14:58:12.603: E/AndroidRuntime(1483): Caused by:
>  java.lang.NoClassDefFoundError: Class not found using the boot class
>  loader; no stack available
> 
> 
>