Error: MapFragment cannot be cast to android.support.v4.app.Fragment

Question

First, I watched out here: Start FragmentActivity from Activity and now I have the following problem:

MapsActivity:

public class MapsActivity extends FragmentActivity {  private GoogleMap mMap;  @Override public void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.maps);     setUpMapIfNeeded(); } ... 

and want to start it out of the MainActivity with:

startActivity(new Intent(this, MapsActivity.class)); 

The activity is registered in Android Manifest:

<activity android:name="de.xbjoernx.gapp.MapsActivity"></activity> 

Error

FATAL EXCEPTION: main java.lang.RuntimeException: Unable to start activity ComponentInfo{de.xbjoernx.gapp/de.xbjoernx.gapp.MapsActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2308)         at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)         at android.app.ActivityThread.access$600(ActivityThread.java:153)         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)         at android.os.Handler.dispatchMessage(Handler.java:99)         at android.os.Looper.loop(Looper.java:137)         at android.app.ActivityThread.main(ActivityThread.java:5227)         at java.lang.reflect.Method.invokeNative(Native Method)         at java.lang.reflect.Method.invoke(Method.java:511)         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)         at dalvik.system.NativeStart.main(Native Method) Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment         at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)         at android.view.LayoutInflater.inflate(LayoutInflater.java:466)         at android.view.LayoutInflater.inflate(LayoutInflater.java:396)         at android.view.LayoutInflater.inflate(LayoutInflater.java:352)         at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:323)         at android.app.Activity.setContentView(Activity.java:1881)         at de.xbjoernx.gapp.MapsActivity.onCreate(MapsActivity.java:19)         at android.app.Activity.performCreate(Activity.java:5104)         at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2262)         ... 11 more Caused by: java.lang.ClassCastException: com.google.android.gms.maps.MapFragment cannot be cast to android.support.v4.app.Fragment         at android.support.v4.app.Fragment.instantiate(Fragment.java:394)         at android.support.v4.app.Fragment.instantiate(Fragment.java:369)         at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:272)         at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)         ... 20 more 

Any suggestions how to fix it?

Thanks so far :)

Answer 1

as you are extending FragmentActivity which indicates you are using Support library v4 compatible with lower version of android. Replace MapFragment with SupportMapFragment inside your xml file. SupportMapFragment is the one to use with the Android Support package. MapFragment is for the native API Level 11 version of fragments.