NPE probably because mUri is null.
From bugsense:
java.lang.RuntimeException: Unable to pause activity {net.lp.collectionista/net.lp.collectionista.ui.activities.phones.collections.CollectionNameEditWindow}: java.lang.NullPointerException
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2949)
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2905)
at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:2883)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1226)
at android.os.Handler.dispatchMessage(Handler.java:119)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4856)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:528)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException
at android.content.ContentResolver.acquireProvider(ContentResolver.java:1123)
at android.content.ContentResolver._logged_update(ContentResolver.java:1060)
at android.content.ContentResolver.update(ContentResolver.java:1052)
at net.lp.collectionista.ui.fragments.collections.CollectionNameEditDialog.onPause(Collectionista:274)
at android.support.v4.app.Fragment.performPause(Collectionista:1661)
at android.support.v4.app.FragmentManagerImpl.moveToState(Collectionista:973)
at android.support.v4.app.FragmentManagerImpl.moveToState(Collectionista:1104)
at android.support.v4.app.FragmentManagerImpl.moveToState(Collectionista:1086)
at android.support.v4.app.FragmentManagerImpl.dispatchPause(Collectionista:1898)
at android.support.v4.app.FragmentActivity.onPause(Collectionista:412)
at android.app.Activity.performPause(Activity.java:5323)
at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1278)
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2936)
... 12 more
Added an exception to make it clear if mUri is null, have't tried fixing it yet.