App crash on file pick in android

[maxbhoria]

Hi i am not able to pick file app get crashed when i select any file.

I an using android device.

Issue printed in console

E/AndroidRuntime( 1459): java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference E/AndroidRuntime( 1459): at com.mr.flutter.plugin.filepicker.FilePickerDelegate$2.run(FilePickerDelegate.java:92) E/AndroidRuntime( 1459): at java.lang.Thread.run(Thread.java:919)

[miguelpruivo]

Hi, how are you picking the file?

[maxbhoria]

Hi, how are you picking the file?

I am using this code

void pickFile() async { setState(() => _loadingPath = true); try { _path = null; _path = await FilePicker.getFilePath( type: _pickingType, allowedExtensions: (_extension?.isNotEmpty ?? false) ? _extension?.replaceAll(' ', '')?.split(',') : null); } on PlatformException catch (e) { print("Unsupported operation" + e.toString()); } if (!mounted) return; setState(() { _loadingPath = false; _fileName = _path != null ? _path.split('/').last : _paths != null ? _paths.keys.toString() : '...'; }); }

[miguelpruivo]

Please, don’t use that. That’s an example code that’s made to fit a lot of use cases with a few lines and shouldn’t be used at on your project.

Check the plugin’s Wiki that has a lot of well documented examples for each use case and let me know if it worked for you.

Thanks!

[maxbhoria]

Please, don’t use that. That’s an example code that’s made to fit a lot of use cases with a few lines and shouldn’t be used at on your project.

Check the plugin’s Wiki that has a lot of well documented examples for each use case and let me know if it worked for you.

Thanks!

Now i used this code but app still crashing

File extraFile = await FilePicker.getFile(type: FileType.any); setState(() { fileName = basename(extraFile.path); });

Error Logs E/AndroidRuntime(20193): java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference E/AndroidRuntime(20193): at com.mr.flutter.plugin.filepicker.FilePickerDelegate$2.run(FilePickerDelegate.java:92) E/AndroidRuntime(20193): at java.lang.Thread.run(Thread.java:919) E/FilePickerUtils(20193): Document URI E/FilePickerUtils(20193): External Document URI E/FilePickerUtils(20193): Primary External Document URI I/FilePickerDelegate(20193): Absolute file path:/storage/emulated/0/Download/dbs-postgraduate-fees-2015-16.pdf

[miguelpruivo]

@maxbhoria when you run the example app, does that happen?

[maxbhoria]

@maxbhoria when you run the example app, does that happen? No this is not happened when i download code from github.

[miguelpruivo]

Hum, there must be something in your project that's resulting in type being null. Which file_picker version are you on? By looking at your stack trace, it's invoking type as null in a place where it can't be null.

Also, run a full flutter clean and build again.

[maxbhoria]

Hum, there must be something in your project that's resulting in type being null. Which file_picker version are you on? By looking at your stack trace, it's invoking type as null in a place where it can't be null.

Also, run a full flutter clean and build again.

Plugin version is file_picker: ^1.10.0 tried many time with flutter clean

Can you tell me how to directly use github plugin directly in my app?

[miguelpruivo]

If you can't reproduce it with the example app, then likely there must be something related to some conflict on your project.

There's no need to use the github project directly on your project as it won't make any difference or whatsoever, but may help you get rid of cached issues. You can give it a try. Just use it like this:

file_picker:
  git: https://github.com/miguelpruivo/flutter_file_picker.git

[maxbhoria]

If you can't reproduce it with the example app, then likely there must be something related to some conflict on your project.

There's no need to use the github project directly on your project as it won't make any difference or whatsoever, but may help you get rid of cached issues. You can give it a try. Just use it like this:

file_picker:
  git: https://github.com/miguelpruivo/flutter_file_picker.git

ok thanks, let me try this!

[maxbhoria]

file_picker: git: https://github.com/miguelpruivo/flutter_file_picker.git

it also did not worked error is same

[miguelpruivo]

Yes, like I told you, pubdev has the same version. I really would like to help you, but I quite don't get what might be triggering it. Maybe post your code block that's asking for the picker.

[maxbhoria]

Yes, like I told you, pubdev has the same version. I really would like to help you, but I quite don't get what might be triggering it. Maybe post your code block that's asking for the picker.

however it does not require any specific setting for android

[maxbhoria]

Yes, like I told you, pubdev has the same version. I really would like to help you, but I quite don't get what might be triggering it. Maybe post your code block that's asking for the picker.

This is complete log have a look in that please

D/SurfaceView(31692): windowStopped(true) false io.flutter.embedding.android.FlutterSurfaceView{9be883b V.E...... ........ 0,0-1080,2301} of ViewRootImpl@98d2c27[MainActivity] D/FlutterView(31692): Detaching from a FlutterEngine: io.flutter.embedding.engine.FlutterEngine@4d2e4be D/SurfaceView(31692): onWindowVisibilityChanged(4) false io.flutter.embedding.android.FlutterSurfaceView{9be883b V.E...... .......D 0,0-1080,2301} of ViewRootImpl@98d2c27[MainActivity] D/ViewRootImpl@98d2c27MainActivity: Relayout returned: old=(0,0,1080,2340) new=(0,0,1080,2340) req=(1080,2340)4 dur=12 res=0x1 s={false 0} ch=false I/FilePickerDelegate(31692): [SingleFilePick] File URI:content://com.android.externalstorage.documents/document/primary%3ADownload%2F4w2E4661.jpg E/FilePickerUtils(31692): Getting for API 19 or abovecontent://com.android.externalstorage.documents/document/primary%3ADownload%2F4w2E4661.jpg D/ViewRootImpl@98d2c27MainActivity: stopped(false) old=true D/SurfaceView(31692): windowStopped(false) false io.flutter.embedding.android.FlutterSurfaceView{9be883b V.E...... .......D 0,0-1080,2301} of ViewRootImpl@98d2c27[MainActivity] E/AndroidRuntime(31692): FATAL EXCEPTION: Thread-6 E/AndroidRuntime(31692): Process: com.babymotherprescription, PID: 31692 E/AndroidRuntime(31692): java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference E/AndroidRuntime(31692): at com.mr.flutter.plugin.filepicker.FilePickerDelegate$2.run(FilePickerDelegate.java:92) E/AndroidRuntime(31692): at java.lang.Thread.run(Thread.java:919) D/ViewRootImpl@98d2c27MainActivity: stopped(false) old=false E/FilePickerUtils(31692): Document URI E/FilePickerUtils(31692): External Document URI E/FilePickerUtils(31692): Primary External Document URI I/FilePickerDelegate(31692): Absolute file path:/storage/emulated/0/Download/4w2E4661.jpg D/SurfaceView(31692): onWindowVisibilityChanged(0) true io.flutter.embedding.android.FlutterSurfaceView{9be883b V.E...... .......D 0,0-1080,2301} of ViewRootImpl@98d2c27[MainActivity] D/ViewRootImpl@98d2c27MainActivity: Relayout returned: old=(0,0,1080,2340) new=(0,0,1080,2340) req=(1080,2340)0 dur=14 res=0x7 s={true 496188772352} ch=true D/OpenGLRenderer(31692): createReliableSurface : 0x740b61bd00, 0x738727d000 I/mali_winsys(31692): new_window_surface() [1080x2340] return: 0x3000 D/SurfaceView(31692): surfaceCreated 1 #8 io.flutter.embedding.android.FlutterSurfaceView{9be883b V.E...... .......D 0,0-1080,2301} D/SurfaceView(31692): surfaceChanged (1080,2301) 1 #8 io.flutter.embedding.android.FlutterSurfaceView{9be883b V.E...... .......D 0,0-1080,2301} I/Process (31692): Sending signal. PID: 31692 SIG: 9

[maxbhoria]

i tried with another new project but the output is same. Have you find anything or have you tried by creating new project to check?

[maxbhoria]

Do you remember any other settings that you did in your example because i don't how your example running perfectly

[maxbhoria]

is this the problem because of i am using kotlin and your plugin is in java?? Because i copy your android folder from the example and i paste it into my sample it worked for me

[miguelpruivo]

It shouldn't have any issue with kotlin projects. But try recreating your project from scratch or run flutter create . on your project so it can add missing files and run it again.

[maxbhoria]

Hello I commented this code in plugin FilePickerDeligate.java, will it create any further issue in my application?

// if (type.equals("dir") && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { // uri = DocumentsContract.buildDocumentUriUsingTree(uri, DocumentsContract.getTreeDocumentId(uri)); // }

[miguelpruivo]

If you’re not planning to pick directories then not. I forgot to ask, what’s the minimum Android sdk of your app?

[maxbhoria]

If you’re not planning to pick directories then not. I forgot to ask, what’s the minimum Android sdk of your app?

yes of course i don't have plan to pick dir as of now but Please make a fix for this problem and my mini sdk is 21.

Thanks for your support

[miguelpruivo]

@maxbhoria I can’t make a fix if I don’t get what’s triggering your issue but I’ll give it a look, could you please tell me details of your app’s build gradle and which version your android device is on?

[maxbhoria]

You can check by creating a new project what wrong is triggered beacause i tried by creating new project also.

I am using Andorid 10 and this is app level gradle

def localProperties = new Properties() def localPropertiesFile = rootProject.file('local.properties') if (localPropertiesFile.exists()) { localPropertiesFile.withReader('UTF-8') { reader -> localProperties.load(reader) } }

def flutterRoot = localProperties.getProperty('flutter.sdk') if (flutterRoot == null) { throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.") }

def flutterVersionCode = localProperties.getProperty('flutter.versionCode') if (flutterVersionCode == null) { flutterVersionCode = '1' }

def flutterVersionName = localProperties.getProperty('flutter.versionName') if (flutterVersionName == null) { flutterVersionName = '1.0' }

apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android { compileSdkVersion 29

sourceSets {
    main.java.srcDirs += 'src/main/kotlin'
}

lintOptions {
    disable 'InvalidPackage'
}

defaultConfig {
    // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
    applicationId "com.babymotherprescription"
    minSdkVersion 21
    targetSdkVersion 29
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}

buildTypes {
    release {
        // TODO: Add your own signing config for the release build.
        // Signing with the debug keys for now, so `flutter run --release` works.
        signingConfig signingConfigs.debug
    }
}

}

flutter { source '../..' }

dependencies { implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" testImplementation 'junit:junit:4.12' androidTestImplementation 'androidx.test:runner:1.1.1' androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1' }

[nicolas-costa]

@maxbhoria if you want a quick workaround, use file_picker: 1.7.0. I was facing the same issue here, strangely enough, the code was working on Friday 5. The older version "solved" it.

[miguelpruivo]

@nicolas-costa did you update it since Friday? The last update only introduced directory picks but for some reason this issue results in file type (apparently) being null where it can’t be, still trying to understand what might be resulting in it but no luck so far.

[nicolas-costa]

@miguelpruivo I didn't intentionally updated it. What I can tell you is that I installed it last week to make some tests and see if it would fit my needs. I followed the docs, where, as you know, it instructs to add "file_picker: ^1.7.1". It was working perfectly.

Then it stopped working somehow. I messed around trying to figure it out, without luck. Then stumbled on this version bump (1.10.0) on my pubspec file, found this issue and had the idea to rollback to 1.7. Boom, working again.

So I guess the package manager updated it for me due to the: ^.

[miguelpruivo]

@nicolas-costa using the carrot operator ^ should only update automatically patch versions (1.0.x) and not minor. Anyhow, is your log trace identically to this one with 1.10.0?

[nicolas-costa]

@miguelpruivo Yes, it is.

[nicolas-costa]

I searched about the carrot operator in dart dependency manager and found that it will update patch and minor versions.

https://dart.dev/tools/pub/dependencies#version-constraints

[miguelpruivo]

@maxbhoria just tried exactly like you, in a new project, Android 10 emulator, minSdk set to 21 and no issues whatsoever.

I'm running on a Mac but that shouldn't be a problem.

@nicolas-costa if you are experiencing the same issue with 1.10.0 I really would like to fix it, but I need to be able to replicate it, so please, give me all the details you can:

• Your build gradle version restrictions;
• Your device version/name and if it's an emulator;
• Other relevant info;

Thanks!

[maxbhoria]

@maxbhoria just tried exactly like you, in a new project, Android 10 emulator, minSdk set to 21 and no issues whatsoever.

I'm running on a Mac but that shouldn't be a problem.

@nicolas-costa if you are experiencing the same issue with 1.10.0 I really would like to fix it, but I need to be able to replicate it, so please, give me all the details you can:

• Your build gradle version restrictions;
• Your device version/name and if it's an emulator;
• Other relevant info;

Thanks!

@miguelpruivo Thanks for your efforts i am also using mac machine with samsung M30s Real device with 10.

If you project is unable to get crash than i can do one thing i can share you my demo project code which i have tried as a sample. So that you address this issue.

Thanks

[maxbhoria]

@miguelpruivo I am sharing my sample app code in which i am getting the crash issue. Please check this out to address the bug. https://drive.google.com/file/d/1cS4kd_F9k_WByLZt9Zl0SPdkPCxuo6I_/view?usp=sharing

Thanks!

[miguelpruivo]

@maxbhoria thank you for your effort, just tried to replicate it with your project, and it's working perfectly. See the gif below:

[maxbhoria]

@maxbhoria thank you for your effort, just tried to replicate it with your project, and it's working perfectly. See the gif below:

have you checked it with real device?

[miguelpruivo]

@maxbhoria no, will try right now.

[miguelpruivo]

@maxbhoria update: just tried it, with a Samsung A40 on Android 10, works fine as well. 😞

[maxbhoria]

 @miguelpruivo I have attached my gif which showing the crash in my real device with android 10 or i also tried at android 6.

[maxbhoria]

[maxbhoria]

@miguelpruivo you can check this as well now its really difficult to understand whats happening with me

[miguelpruivo]

@maxbhoria what is your device?

[maxbhoria]

Samsung M30s with Android 10.

[miguelpruivo]

@maxbhoria what if you pick a file from other location instead of the Recent folder?

[maxbhoria]

same thing happens every time

[miguelpruivo]

@maxbhoria do you have a different device where you can test it on? Maybe with an emulator?

[maxbhoria]

@miguelpruivo i also tried on micromax device with android 6 but no result.

[miguelpruivo]

Could you please try on the same emulator that I'm using? We need to figure if it's an issue with the build or the device. I'm using Nexus 5X with API 29.

[maxbhoria]

Could you please try on the same emulator that I'm using? We need to figure if it's an issue with the build or the device. I'm using Nexus 5X with API 29.

ok i will check and update you.

[maxbhoria]

@miguelpruivo can we connect on any other platform?

[miguelpruivo]

@maxbhoria don't get me wrong, but I'd rather keep it here so others can keep trace of what's happening if they experience the same issue.

[maxbhoria]

@maxbhoria don't get me wrong, but I'd rather keep it here so others can keep trace of what's happening if they experience the same issue.

@miguelpruivo i am asking for others things like i need to ask some other problem i am facing which is not related to this.