Error after upgraded to Flutter 1.12 #27

JuanM04 · 2019-12-16T18:19:29Z

For some reason, it does work when I'm debugging; but after I build the production APK, it throws this error:

PlatformException(connection_failure, java.lang.ClassNotFoundException: com.jcraft.jsch.jce.Random, null)

Flutter Doctor

[✓] Flutter (Channel stable, v1.12.13+hotfix.5, on Mac OS X 10.15.1 19B88, locale en-US)
    • Flutter version 1.12.13+hotfix.5 at /Users/juanm04/dev/tools/flutter
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The text was updated successfully, but these errors were encountered:

thomashuettmaier · 2019-12-17T13:29:06Z

Had the same issues this solved it for me:

Run flutter build apk --release
Ignore all warning like ssh uses unsafe operations
Open the android folder in Android Studio
Let the indexing and the gradle sync process finish
Change the Build Variants to release
Then: Build / Generate Signed Bundle/APK

JuanM04 · 2019-12-17T18:45:16Z

@thomashuettmaier Thanks, that worked for me! How can I do it with flutter build apk --split-per-abi?

tc14077 · 2019-12-19T03:01:10Z

I also encountered this issue. The error log shows:

/flutter/.pub-cache/hosted/pub.dartlang.org/ssh-0.0.5/android/src/main/java/sq/flutter/ssh/SshPlugin.java:404: warning: [unchecked] unchecked conversion
          Vector<LsEntry> files = channelSftp.ls(args.get("path").toString());
                                                ^                       
  required: Vector<ChannelSftp.LsEntry>                                 
  found:    Vector
1 warning  

* What went wrong:                                                      
Execution failed for task ':ssh:verifyReleaseResources'.                
> java.util.concurrent.ExecutionException: com.android.builder.internal.aapt.v2.Aapt2Exception: Android resource linking failed
  myapp/build/ssh/intermediates/res/merged/release/values/values.xml:236: error: resource android:attr/fontVariationSettings not found.
  myapp/build/ssh/intermediates/res/merged/release/values/values.xml:237: error: resource android:attr/ttcIndex not found.
  error: failed linking references.

Anyone has ideas on it?

thomashuettmaier · 2019-12-19T07:54:26Z

@thomashuettmaier Thanks, that worked for me! How can I do it with flutter build apk --split-per-abi?

Sorry I don't have an idea how to do that.

JuanM04 · 2019-12-19T20:10:40Z

I also encountered this issue. The error log shows:

/flutter/.pub-cache/hosted/pub.dartlang.org/ssh-0.0.5/android/src/main/java/sq/flutter/ssh/SshPlugin.java:404: warning: [unchecked] unchecked conversion
          Vector<LsEntry> files = channelSftp.ls(args.get("path").toString());
                                                ^                       
  required: Vector<ChannelSftp.LsEntry>                                 
  found:    Vector
1 warning  

* What went wrong:                                                      
Execution failed for task ':ssh:verifyReleaseResources'.                
> java.util.concurrent.ExecutionException: com.android.builder.internal.aapt.v2.Aapt2Exception: Android resource linking failed
  myapp/build/ssh/intermediates/res/merged/release/values/values.xml:236: error: resource android:attr/fontVariationSettings not found.
  myapp/build/ssh/intermediates/res/merged/release/values/values.xml:237: error: resource android:attr/ttcIndex not found.
  error: failed linking references.

Anyone has ideas on it?

It says :ssh:verifyReleaseResources, so maybe there is an error when building the APK

Nico04 · 2020-01-23T13:33:40Z

Any progress on this issue ?
The workaround doesn't work for me (or maybe I didn't fully understand it)

JuanM04 · 2020-01-25T07:29:42Z

I just set API level ≥ 21. My app simply doesn't support Android 4.4 now

Nico04 · 2020-01-25T14:08:04Z

I just set API level ≥ 21. My app simply doesn't support Android 4.4 now

targetSdkVersion is 28, and minSdkVersion is 18, but I'm testing on Android 9.0, so I don't see the link that this issue may have with minSdkVersion ?

JuanM04 · 2020-01-25T15:10:31Z

I did that, worked for a while weirdly, and then I stopped using this package

Nico04 · 2020-01-26T11:44:14Z

I did that, worked for a while weirdly, and then I stopped using this package

You found an alternative ?

JuanM04 · 2020-01-26T19:20:53Z

No to flutter_ssh, I just found an alternative to solve my particular problem

Diviloper · 2020-01-31T17:47:49Z

I managed to solve the crash in the production APK by adding the --no-shrink flag to the build:

flutter build apk --no-shrink --split-per-abi

My only guess is that the code shrinker thinks the library is not in use and deletes it
Hope it helps

Nico04 · 2020-02-17T14:01:00Z

The workaround also works for me with appbundle
flutter build apk --no-shrink

Any idea how to really fix this ?

zuiwuchang · 2020-03-15T08:16:06Z

com.jcraft.jsch.jce.Random

i have same problem,but i solved it

first edit android/app/build.gradle enable minifyEnabled and useProguard

 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.release

            minifyEnabled true
            useProguard true

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

then create android/app/proguard-rules.pro and write class com.jcraft.,my document like this

#Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }
-keep class com.jcraft.**  { *; }

zuiwuchang · 2020-03-15T08:18:20Z

Any progress on this issue ?
The workaround doesn't work for me (or maybe I didn't fully understand it)

#27 (comment)

camelChief · 2023-03-06T04:53:02Z

i have same problem,but i solved it

first edit android/app/build.gradle enable minifyEnabled and useProguard

 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.release

            minifyEnabled true
            useProguard true

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

then create android/app/proguard-rules.pro and write class com.jcraft.,my document like this

#Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }
-keep class com.jcraft.**  { *; }

If anyone is still struggling with this issue, and this work around didn't fix it for you, try creating the proguard-rules.pro file as stated, but don't edit your build.gradle file. For whatever reason, editing the build.gradle file produced errors for me. While digging, I found this answer https://stackoverflow.com/a/70268820 which states that useProguard is obsolete and will cause Groovy to throw errors. The Android docs https://developer.android.com/studio/build/shrink-code#configuration-files seem to imply that you can still define ProGuard rules to prevent files being removed. So I removed the code from build.gradle that was causing the error and it worked!

tc14077 mentioned this issue Jan 31, 2020

iOS startShell crashes the app #24

Open

shaqian mentioned this issue May 4, 2020

PlatformException(connection_failure, java.lang.ClassNotFoundException: com.jcraft.jsch.jce.Random, null) #35

Closed

MrHazee mentioned this issue May 7, 2020

Not able to create SSHClient when building release #37

Closed

TheStaticTurtle mentioned this issue May 12, 2020

Can not create client in android release #38

Closed

Kamoba mentioned this issue Apr 11, 2021

No-shrink build no longer solves issue #59

Open

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Error after upgraded to Flutter 1.12 #27

Error after upgraded to Flutter 1.12 #27

JuanM04 commented Dec 16, 2019 •

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thomashuettmaier commented Dec 17, 2019 •

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JuanM04 commented Dec 17, 2019

tc14077 commented Dec 19, 2019

thomashuettmaier commented Dec 19, 2019

JuanM04 commented Dec 19, 2019

Nico04 commented Jan 23, 2020 •

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JuanM04 commented Jan 25, 2020

Nico04 commented Jan 25, 2020

JuanM04 commented Jan 25, 2020

Nico04 commented Jan 26, 2020

JuanM04 commented Jan 26, 2020

Diviloper commented Jan 31, 2020 •

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Nico04 commented Feb 17, 2020

zuiwuchang commented Mar 15, 2020

zuiwuchang commented Mar 15, 2020

camelChief commented Mar 6, 2023

Error after upgraded to Flutter 1.12 #27

Error after upgraded to Flutter 1.12 #27

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JuanM04 commented Dec 16, 2019 • edited Loading

thomashuettmaier commented Dec 17, 2019 • edited Loading

JuanM04 commented Dec 17, 2019

tc14077 commented Dec 19, 2019

thomashuettmaier commented Dec 19, 2019

JuanM04 commented Dec 19, 2019

Nico04 commented Jan 23, 2020 • edited Loading

JuanM04 commented Jan 25, 2020

Nico04 commented Jan 25, 2020

JuanM04 commented Jan 25, 2020

Nico04 commented Jan 26, 2020

JuanM04 commented Jan 26, 2020

Diviloper commented Jan 31, 2020 • edited Loading

Nico04 commented Feb 17, 2020

zuiwuchang commented Mar 15, 2020

zuiwuchang commented Mar 15, 2020

camelChief commented Mar 6, 2023

JuanM04 commented Dec 16, 2019 •

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thomashuettmaier commented Dec 17, 2019 •

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Nico04 commented Jan 23, 2020 •

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Diviloper commented Jan 31, 2020 •

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