Android 14 Bluetooth Scanning Issue in latest version (1.0.5)

[nadeesh19]

Please i'm expecting quick solution for this.

I used thermal_printer: ^1.0.5 version.
and my flutter version is Flutter 3.22.1
and this is my android build.gradle file

buildscript {
    ext.kotlin_version = '1.9.10'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:7.3.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.15'
//        id("com.google.gms.google-services") version "4.3.15" apply false
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

tasks.register("clean", Delete) {
    delete rootProject.buildDir
}

This is the Error log in my console.

E/MethodChannel#com.codingdevs.thermal_printer(21824): Failed to handle method call
E/MethodChannel#com.codingdevs.thermal_printer(21824): java.lang.NullPointerException
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at com.codingdevs.thermal_printer.ThermalPrinterPlugin.checkPermissions(ThermalPrinterPlugin.kt:384)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at com.codingdevs.thermal_printer.ThermalPrinterPlugin.verifyIsBluetoothIsOn(ThermalPrinterPlugin.kt:306)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at com.codingdevs.thermal_printer.ThermalPrinterPlugin.onMethodCall(ThermalPrinterPlugin.kt:212)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:267)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:292)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:319)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at android.os.Handler.handleCallback(Handler.java:958)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at android.os.Looper.loopOnce(Looper.java:230)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at android.os.Looper.loop(Looper.java:319)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at android.app.ActivityThread.main(ActivityThread.java:8919)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
E/MethodChannel#com.codingdevs.thermal_printer(21824): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
E/flutter (21824): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(error, null, null, java.lang.NullPointerException
E/flutter (21824): 	at com.codingdevs.thermal_printer.ThermalPrinterPlugin.checkPermissions(ThermalPrinterPlugin.kt:384)
E/flutter (21824): 	at com.codingdevs.thermal_printer.ThermalPrinterPlugin.verifyIsBluetoothIsOn(ThermalPrinterPlugin.kt:306)
E/flutter (21824): 	at com.codingdevs.thermal_printer.ThermalPrinterPlugin.onMethodCall(ThermalPrinterPlugin.kt:212)
E/flutter (21824): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:267)
E/flutter (21824): 	at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:292)
E/flutter (21824): 	at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:319)
E/flutter (21824): 	at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12)
E/flutter (21824): 	at android.os.Handler.handleCallback(Handler.java:958)
E/flutter (21824): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/flutter (21824): 	at android.os.Looper.loopOnce(Looper.java:230)
E/flutter (21824): 	at android.os.Looper.loop(Looper.java:319)
E/flutter (21824): 	at android.app.ActivityThread.main(ActivityThread.java:8919)
E/flutter (21824): 	at java.lang.reflect.Method.invoke(Native Method)
E/flutter (21824): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
E/flutter (21824): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
E/flutter (21824): )
E/flutter (21824): #0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:648:7)
E/flutter (21824): #1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:334:18)
E/flutter (21824): <asynchronous suspension>
E/flutter (21824): 

Thank You!

[studiozocaro]

same problem

[nadeesh19]

@studiozocaro do you have any solution for this ?

[studiozocaro]

no

[MustafaTaj]

downgrade your targetSdkVersion in app/build.gradle to 33

defaultConfig { targetSdkVersion 33 }

the library seems to have an issue with SDK 34

[studiozocaro]

SDK 34 is mandatory to publish Apps on the play store Il mar 16 lug 2024, 15:06 MustafaTaj ***@***.***> ha scritto:

…

downgrade your targetSdkVersion in app/build.gradle to 33 defaultConfig { targetSdkVersion 33 } the library seems to have an issue with SDK 34 — Reply to this email directly, view it on GitHub <#22 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AN5IRWDGBZU4NP553M26LBLZMULD3AVCNFSM6AAAAABJRYKNVWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDEMZQHA2DGNZWG4> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[alterproxi]

Also the usb connection is not working properly after migration to SDK 34

[tothemaxdevs]

is there any solution to fix this? facing same problem here. play store required to set sdk 34.

[hamzamon]

Please fix this issue

[hamzamon]

Could you provide a work around to solve this issue?

[nadeesh19]

I used below packages to avoid this issue because there was no any support from the developer of this package.
STEPS:

1. Remove all the codes related to thermal_printer
2. Add these packages and do some extra works (Read the documentations of these packages and you can do it easily)

flutter_blue_plus: 1.32.11
permission_handler: ^11.3.1
print_bluetooth_thermal: ^1.1.1
esc_pos_utils_plus: 2.0.1+3

[nasibudesign]

you can use thermal_printer_plus it fixes some of these issues