activity.MediaAdd broken on Nexus 7

[daalja]

On Nexus 4 everything is fine, but on Nexus 7 I can't add a file. This happens (F-Droid-Version on Android 4.4.4 / SlimKat 7.4):

08-19 21:09:36.550 D/FDroid  (2041): Getting application details for de.ph1b.audiobook
08-19 21:09:38.111 D/FDroid  (2041): Downloading apk from https://f-droid.org/repo/de.ph1b.audiobook_5.apk
08-19 21:09:38.432 D/FDroid  (2041): Download finished: /storage/emulated/0/Android/data/org.fdroid.fdroid/cache/apks/de.ph1b.audiobook_5.apk
08-19 21:09:38.492 I/ActivityManager(601): START u0 {act=android.intent.action.VIEW dat=file:///storage/emulated/0/Android/data/org.fdroid.fdroid/cache/apks/de.ph1b.audiobook_5.apk typ=application/vnd.android.package-archive cmp=com.android.packageinstaller/.PackageInstallerActivity (has extras)} from pid 2041
08-19 21:09:42.245 I/ActivityManager(601): START u0 {dat=file:///storage/emulated/0/Android/data/org.fdroid.fdroid/cache/apks/de.ph1b.audiobook_5.apk cmp=com.android.packageinstaller/.InstallAppProgress (has extras)} from pid 2888
08-19 21:09:42.386 W/ActivityManager(601): No content provider found for permission revoke: file:///storage/emulated/0/Android/data/org.fdroid.fdroid/cache/apks/de.ph1b.audiobook_5.apk
08-19 21:09:42.406 W/ActivityManager(601): No content provider found for permission revoke: file:///storage/emulated/0/Android/data/org.fdroid.fdroid/cache/apks/de.ph1b.audiobook_5.apk
08-19 21:09:42.936 I/PackageManager(601): Running dexopt on: de.ph1b.audiobook
08-19 21:09:43.286 I/ActivityManager(601): Force stopping de.ph1b.audiobook appid=10067 user=-1: update pkg
08-19 21:09:43.537 D/BackupManagerService(601): Received broadcast Intent { act=android.intent.action.PACKAGE_ADDED dat=package:de.ph1b.audiobook flg=0x4000010 (has extras) }
08-19 21:09:43.757 D/FDroid  (2041): PackageReceiver received [action = 'android.intent.action.PACKAGE_ADDED', data = 'package:de.ph1b.audiobook']
08-19 21:09:43.777 D/FDroid  (2041): Inserting installed app info for 'de.ph1b.audiobook' (v5)
08-19 21:09:59.983 I/Timeline(2888): Timeline: Activity_launch_request id:de.ph1b.audiobook time:147897
08-19 21:09:59.983 I/ActivityManager(601): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 pkg=de.ph1b.audiobook cmp=de.ph1b.audiobook/.activity.MediaView} from pid 2888
08-19 21:10:00.023 I/ActivityManager(601): Start proc de.ph1b.audiobook for activity de.ph1b.audiobook/.activity.MediaView: pid=3279 uid=10067 gids={50067, 1028, 1023, 1015, 3003}
08-19 21:10:00.573 I/ActivityManager(601): Displayed de.ph1b.audiobook/.activity.MediaView: +567ms
08-19 21:10:00.683 I/Timeline(601): Timeline: Activity_windows_visible id: ActivityRecord{424e7300 u0 de.ph1b.audiobook/.activity.MediaView t4} time:148591
08-19 21:10:03.416 I/Timeline(3279): Timeline: Activity_launch_request id:de.ph1b.audiobook time:151321
08-19 21:10:03.416 I/ActivityManager(601): START u0 {cmp=de.ph1b.audiobook/.activity.Preferences} from pid 3279
08-19 21:10:03.576 I/ActivityManager(601): Displayed de.ph1b.audiobook/.activity.Preferences: +157ms
08-19 21:10:03.846 I/Timeline(601): Timeline: Activity_windows_visible id: ActivityRecord{42557820 u0 de.ph1b.audiobook/.activity.Preferences t4} time:151755
08-19 21:10:10.703 I/Timeline(601): Timeline: Activity_windows_visible id: ActivityRecord{424e7300 u0 de.ph1b.audiobook/.activity.MediaView t4} time:158613
08-19 21:10:11.904 I/Timeline(3279): Timeline: Activity_launch_request id:de.ph1b.audiobook time:159813
08-19 21:10:11.904 I/ActivityManager(601): START u0 {cmp=de.ph1b.audiobook/.activity.MediaAdd} from pid 3279
08-19 21:10:12.195 I/ActivityManager(601): Displayed de.ph1b.audiobook/.activity.MediaAdd: +289ms
08-19 21:10:12.465 I/Timeline(601): Timeline: Activity_windows_visible id: ActivityRecord{4271d560 u0 de.ph1b.audiobook/.activity.MediaAdd t4} time:160374
08-19 21:10:23.886 I/Timeline(3279): Timeline: Activity_launch_request id:de.ph1b.audiobook time:171799
08-19 21:10:23.896 I/ActivityManager(601): START u0 {cmp=de.ph1b.audiobook/.activity.BookAdd (has extras)} from pid 3279
08-19 21:10:23.946 E/AndroidRuntime(3279): Process: de.ph1b.audiobook, PID: 3279
08-19 21:10:23.946 E/AndroidRuntime(3279): java.lang.RuntimeException: Unable to start activity ComponentInfo{de.ph1b.audiobook/de.ph1b.audiobook.activity.BookAdd}: java.lang.NullPointerException
08-19 21:10:23.946 E/AndroidRuntime(3279):  at de.ph1b.audiobook.activity.BookAdd.k(Unknown Source)
08-19 21:10:23.946 E/AndroidRuntime(3279):  at de.ph1b.audiobook.activity.BookAdd.onCreate(Unknown Source)
08-19 21:10:23.956 W/ActivityManager(601):   Force finishing activity de.ph1b.audiobook/.activity.BookAdd
08-19 21:10:23.956 W/ActivityManager(601):   Force finishing activity de.ph1b.audiobook/.activity.MediaAdd
08-19 21:10:24.457 W/ActivityManager(601): Activity pause timeout for ActivityRecord{42720b30 u0 de.ph1b.audiobook/.activity.BookAdd t4 f}
08-19 21:10:26.198 I/ActivityManager(601): Process de.ph1b.audiobook (pid 3279) has died.
08-19 21:10:26.198 I/WindowState(601): WIN DEATH: Window{436df860 u0 de.ph1b.audiobook/de.ph1b.audiobook.activity.MediaView}
08-19 21:10:26.198 I/WindowState(601): WIN DEATH: Window{436e40b8 u0 de.ph1b.audiobook/de.ph1b.audiobook.activity.MediaAdd}
08-19 21:10:26.218 I/ActivityManager(601): Start proc de.ph1b.audiobook for activity de.ph1b.audiobook/.activity.MediaView: pid=3341 uid=10067 gids={50067, 1028, 1023, 1015, 3003}
08-19 21:10:26.509 I/ActivityManager(601): Displayed de.ph1b.audiobook/.activity.MediaView: +305ms (total +2s608ms)
08-19 21:10:26.579 I/Timeline(601): Timeline: Activity_windows_visible id: ActivityRecord{424e7300 u0 de.ph1b.audiobook/.activity.MediaView t4} time:174482
08-19 21:12:58.487 I/Timeline(1496): Timeline: Activity_launch_request id:de.ph1b.audiobook time:326390
08-19 21:12:58.487 I/ActivityManager(601): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=de.ph1b.audiobook/.activity.MediaView bnds=[600,960][600,960]} from pid 1496
08-19 21:12:58.627 I/ActivityManager(601): Displayed de.ph1b.audiobook/.activity.MediaView: +131ms
08-19 21:12:59.037 I/Timeline(601): Timeline: Activity_windows_visible id: ActivityRecord{424d1c30 u0 de.ph1b.audiobook/.activity.MediaView t4} time:326947
08-19 21:13:00.008 I/Timeline(3341): Timeline: Activity_launch_request id:de.ph1b.audiobook time:327917
08-19 21:13:00.008 I/ActivityManager(601): START u0 {cmp=de.ph1b.audiobook/.activity.MediaAdd} from pid 3341
08-19 21:13:00.269 I/ActivityManager(601): Displayed de.ph1b.audiobook/.activity.MediaAdd: +246ms
08-19 21:13:00.529 I/Timeline(601): Timeline: Activity_windows_visible id: ActivityRecord{42557820 u0 de.ph1b.audiobook/.activity.MediaAdd t4} time:328437
08-19 21:13:03.812 I/Timeline(3341): Timeline: Activity_launch_request id:de.ph1b.audiobook time:331723
08-19 21:13:03.812 I/ActivityManager(601): START u0 {cmp=de.ph1b.audiobook/.activity.BookAdd (has extras)} from pid 3341
08-19 21:13:03.872 E/AndroidRuntime(3341): Process: de.ph1b.audiobook, PID: 3341
08-19 21:13:03.872 E/AndroidRuntime(3341): java.lang.RuntimeException: Unable to start activity ComponentInfo{de.ph1b.audiobook/de.ph1b.audiobook.activity.BookAdd}: java.lang.NullPointerException
08-19 21:13:03.872 E/AndroidRuntime(3341):  at de.ph1b.audiobook.activity.BookAdd.k(Unknown Source)
08-19 21:13:03.872 E/AndroidRuntime(3341):  at de.ph1b.audiobook.activity.BookAdd.onCreate(Unknown Source)
08-19 21:13:03.882 W/ActivityManager(601):   Force finishing activity de.ph1b.audiobook/.activity.BookAdd
08-19 21:13:03.882 W/ActivityManager(601):   Force finishing activity de.ph1b.audiobook/.activity.MediaAdd
08-19 21:13:04.383 W/ActivityManager(601): Activity pause timeout for ActivityRecord{4269c6b0 u0 de.ph1b.audiobook/.activity.BookAdd t4 f}
08-19 21:13:09.367 I/ActivityManager(601): Process de.ph1b.audiobook (pid 3341) has died.
08-19 21:13:09.367 I/WindowState(601): WIN DEATH: Window{436e4a60 u0 de.ph1b.audiobook/de.ph1b.audiobook.activity.MediaView}
08-19 21:13:09.377 W/InputDispatcher(601): channel '436e7a90 de.ph1b.audiobook/de.ph1b.audiobook.activity.MediaView (server)' ~ Consumer closed input channel or an error occurred.  events=0x9
08-19 21:13:09.377 E/InputDispatcher(601): channel '436e7a90 de.ph1b.audiobook/de.ph1b.audiobook.activity.MediaView (server)' ~ Channel is unrecoverably broken and will be disposed!
08-19 21:13:09.377 W/InputDispatcher(601): Attempted to unregister already unregistered input channel '436e7a90 de.ph1b.audiobook/de.ph1b.audiobook.activity.MediaView (server)'
08-19 21:13:09.377 I/WindowState(601): WIN DEATH: Window{436e8120 u0 de.ph1b.audiobook/de.ph1b.audiobook.activity.MediaAdd}
08-19 21:13:09.377 I/WindowState(601): WIN DEATH: Window{436e7a90 u0 de.ph1b.audiobook/de.ph1b.audiobook.activity.MediaView}
08-19 21:13:09.407 I/ActivityManager(601): Start proc de.ph1b.audiobook for activity de.ph1b.audiobook/.activity.MediaView: pid=3990 uid=10067 gids={50067, 1028, 1023, 1015, 3003}
08-19 21:13:09.698 I/ActivityManager(601): Displayed de.ph1b.audiobook/.activity.MediaView: +310ms (total +5s870ms)
08-19 21:13:09.748 I/Timeline(601): Timeline: Activity_windows_visible id: ActivityRecord{424d1c30 u0 de.ph1b.audiobook/.activity.MediaView t4} time:337651

thx for the nice app!

[PaulWoitaschek]

Could you try the the latest development version and tell me if the problem still exists? (and reopen if so)
https://github.com/Ph1b/MaterialAudiobookPlayer/blob/development/apk/1.2.3.pre-1.apk