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MediaStore lost access to files after uninstalling the app or clearing its data

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#103 7 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
42/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
android, kotlin
Domain
mobile-dev

Research direction

Start with MediaStoreCompat.createMedia at MediaStoreCompat.kt:143 and reproduce both cases on Android 12 using the listed writeToConfig and readConfig flows. Check the behavior after uninstall/reinstall and after manually deleting the Downloads files; done means the existing file remains discoverable and the later write does not trigger SQLiteConstraintException.

Written by the indexing model from the issue text.

Description

bug wontfix

Library version: 1.5.1
OS version: [Android 12]
Device model: [Emulator Pixel 5]

Describe the bug
I'm creating a txt file in Downloads folder with this code:

fun writeToConfig() {
    val file = MediaStoreCompat.createDownload(
        context,
        FileDescription("config-test.txt", "", "text/plain"),
        CreateMode.REUSE,
    )
    file?.openOutputStream(true).use {
        it?.write("HelloWorld\n".toByteArray())
    }
}

And I'm reading the file with this approach:

fun readConfig() {
    val file = MediaStoreCompat.fromFileName(context, MediaType.DOWNLOADS, "config-test.txt")
    file?.openInputStream()?.use {
        val text = it.readBytes().toString(Charsets.UTF_8)
        logD(text)
    }
}

Everything works fine. But after I uninstall the app and reinstall it, when I call the readConfig() function, the file variable is null. and strange thing is that when i call the writeToConfig() function again, instead of reusing the same file it creates a new file with this name: "config-test (1).txt".
So after I saw this, I tried to retest the code and I deleted the files (""config-test.txt" and "config-test (1).txt"). After force stopping and relaunching the app I got an Exception: android.database.sqlite.SQLiteConstraintException.
After this exception you cant work with this code anymore and the only way to fix this crash is that you need to wipe data from your device settings.
So we have two bugs in here

To Reproduce

  1. Use MediaStoreCompat to write/read a file in Downloads folder.
  2. Unistall the app
  3. Install the app
  4. (Bug 1 appears)
  5. Go to Downloads folder and manually delete the file.
  6. Force stop the app
  7. launch the app again.
  8. (Bug 2 --> Crash)

Stacktrace

FATAL EXCEPTION: main
Process: app.source.getcontact, PID: 8835
java.lang.RuntimeException: Unable to create application com.test.myapp.DebugApp: android.database.sqlite.SQLiteConstraintException: UNIQUE constraint failed: files._data (code 2067 SQLITE_CONSTRAINT_UNIQUE)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6730)
at android.app.ActivityThread.access$1500(ActivityThread.java:247)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2053)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7839)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
Caused by: android.database.sqlite.SQLiteConstraintException: UNIQUE constraint failed: files._data (code 2067 SQLITE_CONSTRAINT_UNIQUE)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:178)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:142)
at android.content.ContentProviderProxy.insert(ContentProviderNative.java:557)
at android.content.ContentResolver.insert(ContentResolver.java:2193)
at android.content.ContentResolver.insert(ContentResolver.java:2155)
at com.anggrayudi.storage.media.MediaStoreCompat.createMedia(MediaStoreCompat.kt:143)
at com.anggrayudi.storage.media.MediaStoreCompat.createDownload(MediaStoreCompat.kt:34)
at com.test.myapp.ConfigCache.writeToConfig(ConfigCacheImpl.kt:37)
at com.test.myapp.DebugApp.onCreate(DebugApp.kt:7)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1211)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6725)
at android.app.ActivityThread.access$1500(ActivityThread.java:247) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2053) 
at android.os.Handler.dispatchMessage(Handler.java:106) 
at android.os.Looper.loopOnce(Looper.java:201) 
at android.os.Looper.loop(Looper.java:288) 
at android.app.ActivityThread.main(ActivityThread.java:7839) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003) 
Dominant language
Kotlin
Stars
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Forks
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