title: app crashes when trying to use google maps on device
body: <p>Can anyone explain this logcat report to me, im trying to work with google maps and when i click on the maps tab on my device the app fails with the error message, 'unfortunately app has stopped working'?   </p>
  
  <pre><code>03-12 13:34:19.998: E/AndroidRuntime(9464): FATAL EXCEPTION: main
  03-12 13:34:19.998: E/AndroidRuntime(9464): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.softwaresearchapp/com.example.softwaresearchapp.MapsActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.ActivityThread.startActivityNow(ActivityThread.java:2023)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:749)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.widget.TabHost.setCurrentTab(TabHost.java:413)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:154)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:546)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.view.View.performClick(View.java:4202)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.view.View$PerformClick.run(View.java:17340)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.os.Handler.handleCallback(Handler.java:725)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.os.Handler.dispatchMessage(Handler.java:92)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.os.Looper.loop(Looper.java:137)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.ActivityThread.main(ActivityThread.java:5039)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at java.lang.reflect.Method.invokeNative(Native Method)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at java.lang.reflect.Method.invoke(Method.java:511)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at dalvik.system.NativeStart.main(Native Method)
  03-12 13:34:19.998: E/AndroidRuntime(9464): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.Activity.setContentView(Activity.java:1881)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at com.example.softwaresearchapp.MapsActivity.onCreate(MapsActivity.java:12)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.Activity.performCreate(Activity.java:5104)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     ... 18 more
  03-12 13:34:19.998: E/AndroidRuntime(9464): Caused by: android.app.Fragment$InstantiationException: Unable to instantiate fragment com.google.android.gms.maps.MapFragment: make sure class name exists, is public, and has an empty constructor that is public
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.Fragment.instantiate(Fragment.java:592)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.Fragment.instantiate(Fragment.java:560)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.Activity.onCreateView(Activity.java:4709)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     ... 27 more
  03-12 13:34:19.998: E/AndroidRuntime(9464): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.maps.MapFragment" on path: /data/app/com.example.softwaresearchapp-1.apk
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     at android.app.Fragment.instantiate(Fragment.java:582)
  03-12 13:34:19.998: E/AndroidRuntime(9464):     ... 30 more
  </code></pre>