Bluetooth adapter is not available

[bobosette]

Hi everybody. I'm trying the flutter blue example on an Android 10 device but when I open the app i get this msd: "the bluetooth adapter is not available"! If I debug that I see that the FlutterBlue.instance.state is null! But if i open the app in an older Android device it works fine! Can somebody help me?

[Hoopstr42]

I am getting the same issue in my project but only when do a release build.

I have run it on Android 10 & 11 same issue.

Android Manifiest <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.flutter_base"> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.RECORD_AUDIO" /> <uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> <uses-permission android:name="android.permission.BLUETOOTH" /> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> </manifest>

build.gradle `android { compileSdkVersion 29

lintOptions {
    disable 'InvalidPackage'
}

defaultConfig {
    applicationId "com.x.x"
    minSdkVersion 24
    targetSdkVersion 29
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}`

[bobosette]

I didn't think about it but I also have this issue only in a release build. How is it possible??

[JimmyLee05]

I have the same issue

Flutter version 1.22.3

[ch-muhammad-adil]

Please try to role back to 0.7.2 and also make sure you have removed these permissions because these are already there in the plugin.

android.permission.ACCESS_FINE_LOCATION
android.permission.BLUETOOTH
android.permission.BLUETOOTH_ADMIN

[Hoopstr42]

Just FYI, we found a workaround by rolling back to v0.7.2. So if you don't need the protobuf-lite fix. Just roll back and you will be good to go.

[bobosette]

Ok i'm gonna try this and i'll let u know

Il Mer 18 Nov 2020, 17:17 Jody Holmes [email protected] ha scritto:

Just FYI, we found a workaround by rolling back to v0.7.2. So if you don't need the protobuf-lite fix. Just roll back and you will be good to go.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/pauldemarco/flutter_blue/issues/726#issuecomment-729787253, or unsubscribe https://github.com/notifications/unsubscribe-auth/ADEWB4KNEBODED3WGHJ6MZLSQPXP3ANCNFSM4TY6Y3GQ .

[bobosette]

You're right. Now the app works correctly. Thank you.

[JimmyLee05]

Please try " flutter build apk --no-shrink " to build your release build.

v0.7.3 works good.

[bufolab]

Yes, 0.7.3 with "flutter build apk --release" is not working. With "flutter build apk --no-shrink " indeed works. Looks like R8 is messing up.

[MrCsabaToth]

Just FYI, we found a workaround by rolling back to v0.7.2. So if you don't need the protobuf-lite fix. Just roll back and you will be good to go.

I just hit this, only release build is affected. Is there an other issue involved? Can your reference? I don't need or use protobuf.

[MrCsabaToth]

Ok, I think this is a protobuf issue @Hoopstr42 mentions: https://github.com/pauldemarco/flutter_blue/issues/717 I saw the "WARNING: This version of flutter_blue will break your Android build if it or its dependencies aren't compatible with AndroidX.".

[ayushin]

We should mention this as a breaking change.

[MrCsabaToth]

Guys, I nuked my whole android port and re-created it because of https://github.com/miguelpruivo/flutter_file_picker/issues/545 and I tested and now 0.7.3 does not produce the release-only error for me. This means that this problem is not with flutter_blue but because of the complexity and interference of this system with many moving parts.

[MrCsabaToth]

Lately even nuking and recreating the android port doesn't solve this.

[MrCsabaToth]

https://github.com/pauldemarco/flutter_blue/issues/662 helped

[JAICHANGPARK]

I have same issue

[chanum]

flutter_blue: ^0.7.3

I've the same issue building the APK release with "flutter build apk --release" in Android 7.1.1 (Samsung Tablet) and Phone (Motorola Android 10).

But the workaround "flutter build apk --no-shrink" works for me.

[JAICHANGPARK]

flutter build apk --no-shrink

this is not works for me (android 8.1)

[GuruJohn]

Seems to be happening on IOS as well, and none of the work arounds function.

[shobhit14gupta]

For flutter_blue v0.8.0 :

Try this during release build : https://github.com/pauldemarco/flutter_blue/issues/772#issuecomment-827404250

[anthonyorona]

@MrCsabaToth Hey small world I saw you at Google Dev Fest in Fresno.. maybe like 2017?

[MrCsabaToth]

@MrCsabaToth Hey small world I saw you at Google Dev Fest in Fresno.. maybe like 2017?

Oh yes, Valley DevFest!

[myogesh7]

       Work-around for https://github.com/pauldemarco/flutter_blue/issues/772

add the below two lines in buid.gradle(app) -> buildTypes -> release shrinkResources false minifyEnabled false

works like magic

[Githubsaveme]

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

Note:- Run flutter build apk --no-shrink

Working :)