App crashes sometime after BluetoothClient.sendText

Bugs and Other Issues
1

I've some code that sends short messages over (classic) bluetooth, E.g.

image
image676×532 43.1 KB

Using ADB I get the following crash log:

Blockquote
--------- beginning of crash
06-24 20:58:27.532 4724 17673 E AndroidRuntime: FATAL EXCEPTION: Thread-6
06-24 20:58:27.532 4724 17673 E AndroidRuntime: Process: com.google.android.providers.media.module, PID: 4724
06-24 20:58:27.532 4724 17673 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.os.storage.StorageVolume.getMediaStoreVolumeName()' on a null object reference
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at com.android.providers.media.util.FileUtils.getVolumeName(FileUtils.java:837)
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at com.android.providers.media.scan.ModernMediaScanner$Scan.(ModernMediaScanner.java:312)
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at com.android.providers.media.scan.ModernMediaScanner.scanDirectory(ModernMediaScanner.java:225)
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at com.android.providers.media.MediaProvider.scanDirectory(MediaProvider.java:1111)
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at com.android.providers.media.MediaService.onScanVolume(MediaService.java:148)
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at com.android.providers.media.MediaProvider.onIdleMaintenance(MediaProvider.java:999)
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at com.android.providers.media.IdleService.lambda$onStartJob$0(IdleService.java:43)
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at com.android.providers.media.IdleService.lambda$onStartJob$0$IdleService(Unknown Source:0)
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at com.android.providers.media.-$$Lambda$IdleService$JjwnmffYz-dHZaOMAebPNoWHP20.run(Unknown Source:4)
06-24 20:58:27.532 4724 17673 E AndroidRuntime: at java.lang.Thread.run(Thread.java:923)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: FATAL EXCEPTION: Thread-3
06-24 20:59:02.805 17809 18033 E AndroidRuntime: Process: com.google.android.providers.media.module, PID: 17809
06-24 20:59:02.805 17809 18033 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.os.storage.StorageVolume.getMediaStoreVolumeName()' on a null object reference
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at com.android.providers.media.util.FileUtils.getVolumeName(FileUtils.java:837)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at com.android.providers.media.scan.ModernMediaScanner$Scan.(ModernMediaScanner.java:312)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at com.android.providers.media.scan.ModernMediaScanner.scanDirectory(ModernMediaScanner.java:225)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at com.android.providers.media.MediaProvider.scanDirectory(MediaProvider.java:1111)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at com.android.providers.media.MediaService.onScanVolume(MediaService.java:148)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at com.android.providers.media.MediaProvider.onIdleMaintenance(MediaProvider.java:999)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at com.android.providers.media.IdleService.lambda$onStartJob$0(IdleService.java:43)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at com.android.providers.media.IdleService.lambda$onStartJob$0$IdleService(Unknown Source:0)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at com.android.providers.media.-$$Lambda$IdleService$JjwnmffYz-dHZaOMAebPNoWHP20.run(Unknown Source:4)
06-24 20:59:02.805 17809 18033 E AndroidRuntime: at java.lang.Thread.run(Thread.java:923)

Any ideas please

2

We don't see the rest of the project. We don't know what extensions you're using. This code should not crash. What device, what android. Also, I don't think this log shows when the error occurred in your app. Use filtering, e.g. by the package name of your app.

3

Thanks for replying. I've cut down the app to the minimum.

image
image1256×632 72.1 KB

The test sequence was to tap the two buttons to prove they work, select a BT device, tap a button, then tap another and note that there is no response.

and this is the filtered log:

18.358 568 1136 I BufferQueueProducer: ===TEST_BT===/===TEST_BT===.Screen1#0 queueBuffer: fps=0.82
dur=3649.57 max=3600.61 min=18.43
20.993 568 629 I BufferQueueProducer: ===TEST_BT===/===TEST_BT===.Screen1#0 queueBuffer: fps=1.52
dur=2634.79 max=2503.26 min=4.72
28.073 568 1136 I BufferQueueProducer: ===TEST_BT===/===TEST_BT===.Screen1#0 queueBuffer: fps=0.56
dur=7080.29 max=6937.15 min=15.18
28.211 1083 1261 I ActivityTaskManager: START u0 {cmp====TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity (has extras)} from uid 10170
28.226 550 581 I mtkpower@impl: [notifyAppState] act ===TEST_BT===.Screen1 => com.google.appinventor.components.runtime.ListPickerActivity
28.226 1083 3763 W WindowManager: Changing focus fromWindow{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} to null displayId=0
Callers=com.android.server.wm.RootWindowContainer.updateFocusedWindowLocked:457 com.android.server.wm.WindowManagerService.updateFocusedWindowLocked:5599 com.android.server.wm.DisplayContent.setFocusedApp:5517
com.android.server.wm.ActivityTaskManagerService.setResumedActivityUncheckLocked:5522
28.230 1083 1261 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{16bf5c9 u0
===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
28.248 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
28.248 1083 3763 I InputDispatcher: Focus left window: Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} in display 0
28.248 1083 3763 I InputDispatcher: Window went away: Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1}
28.258 568 1135 I SurfaceFlinger: [SF client] NEW(0xb40000724113b3b0) for (21129:===TEST_BT===)
28.277 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
28.285 1083 3763 I WindowManager: Relayout Window{bab122e u0 ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity}: oldVis=4 newVis=0 focusMayChange =
true
28.289 1083 3763 W WindowManager: Changing focus fromnull to Window{bab122e u0 ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} displayId=0
Callers=com.android.server.wm.RootWindowContainer.updateFocusedWindowLocked:457 com.android.server.wm.WindowManagerService.updateFocusedWindowLocked:5599 com.android.server.wm.WindowManagerService.relayoutWindow:2392
com.android.server.wm.Session.relayout:213
28.295 568 1135 I BufferQueueProducer: ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 connect(): api=1
producerControlledByApp=false
28.296 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.313 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.313 1083 3763 I InputDispatcher: Window went away: ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0
28.332 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.337 1083 1113 I ActivityTaskManager: Displayed ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity: +126ms
28.349 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.349 1083 2746 I InputDispatcher: Focus entered window: Window{bab122e u0 ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} in display 0
28.356 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.360 2615 2615 I GoogleInputMethodService: GoogleInputMethodService.onStartInput():1902 onStartInput(EditorInfo{EditorInfo{packageName====TEST_BT===, inputType=0,
inputTypeString=NULL, enableLearning=false, autoCorrection=false, autoComplete=false, imeOptions=0, privateImeOptions=null, actionName=UNSPECIFIED, actionLabel=null, initialSelStart=-1, initialSelEnd=-1, initialCapsMode=0,
label=null, fieldId=-1, fieldName=null, extras=null, hintText=null, hintLocales=[]}}, false)
28.375 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.393 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.411 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.432 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.454 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.478 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.494 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.509 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.525 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.540 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.555 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.557 568 629 I BufferQueueProducer: ===TEST_BT===/===TEST_BT===.Screen1#0 disconnect(): api=1
28.572 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.590 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
28.607 568 568 I BufferQueueConsumer: ===TEST_BT===/===TEST_BT===.Screen1#0 disconnect()
28.607 568 568 I BufferQueue: ===TEST_BT===/===TEST_BT===.Screen1#0 onDestructor()
28.609 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{bab122e u0
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
28.610 1083 2746 I InputDispatcher: Window went away: ===TEST_BT===/===TEST_BT===.Screen1#0
29.495 568 1136 I BufferQueueProducer: ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0
queueBuffer: fps=1.70 dur=1175.01 max=1156.43 min=18.58
30.517 568 1136 I BufferQueueProducer: ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0
queueBuffer: fps=16.63 dur=1022.34 max=757.15 min=7.94
30.583 550 581 I mtkpower@impl: [notifyAppState] act com.google.appinventor.components.runtime.ListPickerActivity => ===TEST_BT===.Screen1
30.584 1083 3763 W WindowManager: Changing focus fromWindow{bab122e u0 ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} to null displayId=0
Callers=com.android.server.wm.RootWindowContainer.updateFocusedWindowLocked:457 com.android.server.wm.WindowManagerService.updateFocusedWindowLocked:5599 com.android.server.wm.DisplayContent.setFocusedApp:5517
com.android.server.wm.ActivityTaskManagerService.setResumedActivityUncheckLocked:5522
30.597 1083 2746 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
30.597 1083 2746 I InputDispatcher: Focus left window: Window{bab122e u0 ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity} in display 0
30.597 1083 2746 I InputDispatcher: Window went away: Window{bab122e u0 ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity}
30.614 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
31.825 1083 3763 I WindowManager: Relayout Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1}: oldVis=8 newVis=0 focusMayChange = true
31.830 1083 3763 W WindowManager: Changing focus fromnull to Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} displayId=0
Callers=com.android.server.wm.RootWindowContainer.updateFocusedWindowLocked:457 com.android.server.wm.WindowManagerService.updateFocusedWindowLocked:5599 com.android.server.wm.WindowManagerService.relayoutWindow:2392
com.android.server.wm.Session.relayout:213
31.835 568 1136 I BufferQueueProducer: ===TEST_BT===/===TEST_BT===.Screen1#0 connect(): api=1
producerControlledByApp=false
31.846 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 ===TEST_BT===/===TEST_BT===.Screen1#0 Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
31.856 568 628 I BufferQueueProducer: ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0
queueBuffer: fps=1.49 dur=1339.23 max=1272.92 min=66.31
31.861 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
31.862 1083 3763 I InputDispatcher: Window went away: ===TEST_BT===/===TEST_BT===.Screen1#0
31.869 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
31.869 1083 3755 I InputDispatcher: Focus entered window: Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} in display 0
31.887 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
31.896 2615 2615 I GoogleInputMethodService: GoogleInputMethodService.onStartInput():1902 onStartInput(EditorInfo{EditorInfo{packageName====TEST_BT===, inputType=0,
inputTypeString=NULL, enableLearning=false, autoCorrection=false, autoComplete=false, imeOptions=0, privateImeOptions=null, actionName=UNSPECIFIED, actionLabel=null, initialSelStart=-1, initialSelEnd=-1, initialCapsMode=0,
label=null, fieldId=-1, fieldName=null, extras=null, hintText=null, hintLocales=[]}}, false)
31.906 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
31.927 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
31.942 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
31.960 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
31.974 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
31.990 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
32.007 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
32.024 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
32.041 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
32.049 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
32.085 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar}
===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 Window{16bf5c9 u0 ===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0
com.android.systemui.ImageWallpaper}
32.096 568 1738 I BufferQueueProducer: ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 disconnect(): api=1
32.102 1083 3755 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{16bf5c9 u0
===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
32.102 1083 3755 I InputDispatcher: Window went away: ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0
32.120 568 568 I BufferQueueConsumer: ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 disconnect()
32.120 568 568 I BufferQueue: ===TEST_BT===/com.google.appinventor.components.runtime.ListPickerActivity#0 onDestructor()
32.122 1083 1261 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{16bf5c9 u0
===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
32.138 1083 1261 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{16bf5c9 u0
===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
33.311 568 1135 I BufferQueueProducer: ===TEST_BT===/===TEST_BT===.Screen1#0 queueBuffer: fps=1.37
dur=1464.87 max=1387.55 min=77.31
39.601 1083 1176 I WindowManager: Input event dispatching timed out sending to ===TEST_BT===/===TEST_BT===.Screen1. Reason: 16bf5c9
===TEST_BT===/===TEST_BT===.Screen1 (server) is not responding. Waited 5004ms for MotionEvent
39.824 1083 1176 W InputDispatcher: Canceling events for 16bf5c9 ===TEST_BT===/===TEST_BT===.Screen1 (server) because it is unresponsive
39.880 1083 21176 I AnrManager: startAsyncDump: AnrDumpRecord{ Input dispatching timed out (16bf5c9 ===TEST_BT===/===TEST_BT===.Screen1 (server) is not
responding. Waited 5004ms for MotionEvent) ProcessRecord{17f8958 21129:===TEST_BT===/u0a170} IsCompleted:false IsCancelled:false }, isSilentANR = false
39.880 1083 21176 I AnrManager: dumpAnrDebugInfo begin: AnrDumpRecord{ Input dispatching timed out (16bf5c9 ===TEST_BT===/===TEST_BT===.Screen1 (server)
is not responding. Waited 5004ms for MotionEvent) ProcessRecord{17f8958 21129:===TEST_BT===/u0a170} IsCompleted:false IsCancelled:false }, isAsyncDump = false, isSilentANR = false
39.880 1083 21176 I AnrManager: dumpAnrDebugInfoLocked: AnrDumpRecord{ Input dispatching timed out (16bf5c9 ===TEST_BT===/===TEST_BT===.Screen1 (server)
is not responding. Waited 5004ms for MotionEvent) ProcessRecord{17f8958 21129:===TEST_BT===/u0a170} IsCompleted:false IsCancelled:false }, isAsyncDump = false, isSilentANR = false
39.883 1083 3763 I InputDispatcher: setInputWindows displayId=0 Window{4e5dad8 u0 NavigationBar0} Window{287bd6 u0 StatusBar} Window{16bf5c9 u0
===TEST_BT===/===TEST_BT===.Screen1} Window{fe921f1 u0 com.android.systemui.ImageWallpaper}
40.381 1083 1124 I AnrManager: START_ANR_DUMP_MSG: AnrDumpRecord{ Input dispatching timed out (16bf5c9 ===TEST_BT===/===TEST_BT===.Screen1 (server) is
not responding. Waited 5004ms for MotionEvent) ProcessRecord{17f8958 21129:===TEST_BT===/u0a170} IsCompleted:false IsCancelled:false }, isSilentANR = false
40.381 1083 1124 I AnrManager: dumpAnrDebugInfo begin: AnrDumpRecord{ Input dispatching timed out (16bf5c9 ===TEST_BT===/===TEST_BT===.Screen1 (server)
is not responding. Waited 5004ms for MotionEvent) ProcessRecord{17f8958 21129:===TEST_BT===/u0a170} IsCompleted:false IsCancelled:false }, isAsyncDump = true, isSilentANR = false

Note:
a) the "is not responding entry" in the log. I couldn't see anything untoward happening prior to that but I'm not an expert. The only thing I can think of is that the Bluetooth Client has hung/crashed.
b) I've replaced the App name with ===TEST_BT=== to cut down the size of this post

Any more thought will be gratefully received.