Develop Reference

brainsketchscan keeps stopping on android

While using Futronic finger print, it throws an error "BrainSketchScan keeps stopping" and exits the program on Android Pixel 4a phone. I tried using clear cache and storage etc., but it does not resolve the issue.
On the console it throws the following error
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.futronictechs, PID: 18154
java.lang.UnsatisfiedLinkError: dlopen failed: library "libusb-1.0.so" not found
Can someone please help, as I am not able to use the Futronic fingerprint scanner on Android 10+ version phones
I tried using clear cache and storage etc., but it does not resolve the issue.
On the console it throws the following error
Tried ensuring that the libs are available in the respective folder

Errors occur in some specific mobiles on crashlytics

There are some errors which only occur in some specific mobiles and that are shown in crashlytics. In my mobile device app working fine but there are some mobiles where the screen is crashing. I am unable to identify how to resolve that issue without knowing the cause of error. For now it is showing me this error which I have pasted below.
This is the title on Crashlytics .
ConsumerSingleObserver.java line 49
and this exception is showing
Fatal Exception: io.reactivex.rxjava3.exceptions.CompositeException: 2 exceptions occurred.
at io.reactivex.rxjava3.internal.observers.ConsumerSingleObserver.onError(ConsumerSingleObserver.java:49)
at io.reactivex.rxjava3.internal.operators.single.SingleObserveOn$ObserveOnSingleObserver.run(SingleObserveOn.java:79)
at io.reactivex.rxjava3.android.schedulers.HandlerScheduler$ScheduledRunnable.run(HandlerScheduler.java:123)
at android.os.Handler.handleCallback(Handler.java:914)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:225)
at android.app.ActivityThread.main(ActivityThread.java:7563)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:994)
Caused by io.reactivex.rxjava3.exceptions.CompositeException$a: Multiple exceptions (2)
|-- androidx.room.rxjava3.EmptyResultSetException: Query returned empty result set: select * from FamilyDetails where serverId=?
at b.g.i.a.f.i$g.call(FamilyDetailsDao_Impl.java:90)
|-- java.lang.NullPointerException: null
at b.g.n.d.q.i.k(ConsentStepViewModel.kt:2)

CompositeException is usually thrown when your error handler itself throws an exception when it's handling an error thrown in the stream.
Make sure your error handling code is not throwing any exceptions.
Usually the stack trace will have the root cause below the CompositeException, prefixed with Caused by.

Crash on Production Firebase Database RejectedExecution Exception and HardAssert Exception

Android App getting crashed on production many times by two exceptions.
Non-fatal Exception: java.lang.RuntimeException: Uncaught exception in Firebase Database runloop (20.0.0).
further caused by:
Caused by java.lang.AssertionError: hardAssert failed: Expected connection state disconnected, but was GettingToken
at com.google.firebase.database.connection.ConnectionUtils.hardAssert(ConnectionUtils.java:67)
and
Non-fatal Exception: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask#ea8d495 rejected from com.google.firebase.database.v.i0.c$a#ee619aa[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 430]
I had tried the latest version of Firebase Libraries, tried older version libraries as well but no luck.
This is only happening on production live build, so it is hard to track the cause.
Someone help is highly appreciated. Please help me out.
Thanks

Android SQLiteDiskIOException (code 522 SQLITE_IOERR_SHORT_READ)

I am on Android O and using Room database, from time to time, I experience SQLiteDisckIOException, I try to troubleshoot problem but the stack doesn't tell me where the failing point is. Can some give me some hint or how to troubleshoot this kind of problem and what is the potential problem here? The app that I am writing will write to database when location change, and also there are couple background task that periodic update database when needed.
Here is the stack I see:
10-07 22:29:41.404 22214-22226/? E/DataBuffer: Internal data leak within a DataBuffer object detected! Be sure to explicitly call release() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.DataHolder#b0fef92)
10-07 22:29:41.405 22214-22226/? E/DataBuffer: Internal data leak within a DataBuffer object detected! Be sure to explicitly call release() on all DataBuffer extending objects when you are done with them. (internal object: com.google.android.gms.common.data.DataHolder#db3ad63)
10-07 22:29:41.415 19847-19847/com.firsapp.testing E/Periodic: from PIM->onCreateOptionMenu
10-07 22:29:41.442 19847-21824/com.firsapp.testing E/SQLiteLog: (522) statement aborts at 7: [SELECT DISTINCT tag FROM worktag WHERE work_spec_id=?] disk I/O error
10-07 22:29:41.443 19847-21824/com.firsapp.testing E/SQLiteQuery: exception: disk I/O error (code 522 SQLITE_IOERR_SHORT_READ); query: SELECT DISTINCT tag FROM worktag WHERE work_spec_id=?
10-07 22:29:41.449 19847-21824/com.firsapp.testing E/AndroidRuntime: FATAL EXCEPTION: pool-6-thread-2
Process: com.firsapp.testing, PID: 19847
android.database.sqlite.SQLiteDiskIOException: disk I/O error (code 522 SQLITE_IOERR_SHORT_READ)
at android.database.sqlite.SQLiteConnection.nativeExecuteForCursorWindow(Native Method)
at android.database.sqlite.SQLiteConnection.executeForCursorWindow(SQLiteConnection.java:859)
at android.database.sqlite.SQLiteSession.executeForCursorWindow(SQLiteSession.java:836)
at android.database.sqlite.SQLiteQuery.fillWindow(SQLiteQuery.java:62)
at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:149)
at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:137)
at androidx.work.impl.model.WorkTagDao_Impl.getTagsForWorkSpecId(WorkTagDao_Impl.java:92)
at androidx.work.impl.WorkerWrapper.run(WorkerWrapper.java:102)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:764)
10-07 22:29:41.579 890-890/? E/lowmemorykiller: Error writing /proc/19847/oom_score_adj; errno=22

From the SQLite documentation SQLITE_IOERR_SHORT_READ refers to a case where the database was unable to read the requested number of bytes from the file system.
https://www.sqlite.org/rescode.html#ioerr_short_read
Do you allow your apps to be installed on the external storage directory ?
https://developer.android.com/guide/topics/manifest/manifest-element.html#install
My guess is that:
Either the file system on the device is problematic.
The app was in an external storage directory, and the SD card was removed while the user was using your app, and that caused SQLite to throw this exception.

[Android]: Firebase database causes SQLiteDatabaseLockedException

We used Firebase Database to synchronize data and we found an exception in crash report. Here is brief log:
Caused by com.google.firebase.database.DatabaseException:
Failed to gain exclusive lock to Firebase Database's offline persistence.
...
Caused by android.database.sqlite.SQLiteDatabaseLockedException: database is locked (code 5): ,
while compiling: PRAGMA journal_mode
More detail log is here. Here is our Firebase Database init code
// run in Application onCreate method
FirebaseDatabase.getInstance().setPersistenceEnabled(true);
Mostly, HTC mobiles with API level 19 are impact. We try to reproduce this
bug, but fail.