CODEWITHSUNDEEP
javaandroidgoogle-mapsandroid-fragments
user971741
user971741

Reputation:

java.lang.ClassCastException cannot be cast to android.app.Fragment

I have MainActivity class which have method which instantiate ApplicationBar, all other Activities are inherited form this MainActivity so they can use this method.

But I also have a class MapHolder which has to be extended from FragmentActivity as in xml it uses a fragment to display map. The issue is if I extend it from FragmentActivity I cannot display ApplicationBar Tabs and if I extend it from MainActivity than I can't display maps and it gives this error:

LogCat Output:

    09-29 17:52:10.107: E/GooglePlayServicesUtil(3788): Google Play services is invalid. Cannot recover.
09-29 17:52:43.536: E/AndroidRuntime(3832): FATAL EXCEPTION: main
09-29 17:52:43.536: E/AndroidRuntime(3832): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mydomain.myproj/com.mydomain.myproj.MapHolder }: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.os.Looper.loop(Looper.java:137)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.ActivityThread.main(ActivityThread.java:5103)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at java.lang.reflect.Method.invokeNative(Native Method)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at java.lang.reflect.Method.invoke(Method.java:525)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at dalvik.system.NativeStart.main(Native Method)
09-29 17:52:43.536: E/AndroidRuntime(3832): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:267)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.Activity.setContentView(Activity.java:1895)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at com.mydomain.myproj.MapHolder .onCreate(MapHolder .java:19)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.Activity.performCreate(Activity.java:5133)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
09-29 17:52:43.536: E/AndroidRuntime(3832):     ... 11 more
09-29 17:52:43.536: E/AndroidRuntime(3832): Caused by: java.lang.ClassCastException: com.google.android.gms.maps.SupportMapFragment cannot be cast to android.app.Fragment
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.Fragment.instantiate(Fragment.java:585)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.Fragment.instantiate(Fragment.java:560)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.app.Activity.onCreateView(Activity.java:4738)
09-29 17:52:43.536: E/AndroidRuntime(3832):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:689)
09-29 17:52:43.536: E/AndroidRuntime(3832):     ... 20 more

Upvotes: 0

Views: 9578

Answers (2)

betorcs
betorcs

Reputation: 2821

If you are using com.google.android.gms.maps.SupportMapFragment your activity must extends android.support.v4.app.FragmentActivity instead of android.app.Activity

Upvotes: 0

CommonsWare
CommonsWare

Reputation: 1006674

You are attempting to cast a SupportMapFragment to be a native API Level 11 android.app.Fragment. That will not work. Either:

  • Set your android:minSdkVersion to 11 or higher, and use MapFragment instead of SupportMapFragment, or

  • Cast your SupportMapFragment to be an android.support.v4.app.Fragment

The issue is if I extend it from FragmentActivity I cannot display ApplicationBar Tabs

The action bar was added to Android in API Level 11. If you wish to use an action bar on older versions of Android, you will need to use a backport, either ActionBarSherlock or the AppCompat backport in the Android Support package.

Upvotes: 4

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