On Release Build, printer 🖨 is not printing

[amosogra]

On debug build, it works flawlessly, but on release build this error message was printed as toast: "Empty print job"
I have tried all possible ways but to no avail.

Kotlin version: 1.6.10
min sdk: 21
target sdk: 33
AGP: 7.2.1
Gradle: 7.4.2

Please help me resolve this issue

[Muraveiko Oleg U.]

https://github.com/google/gson/blob/master/examples/android-proguard-example/proguard.cfg

[Muraveiko Oleg U.]

IF your build.gradle(:app) mihify & shrink ?

    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

THEN
add in your project
proguard-rules.pro:

-keep class rawbt.** { *; }

[Muraveiko Oleg U.]

update
implementation 'com.github.402d:RawbtAPI:9238fdefc6'

Is it help (without strings from previus answer)?

[amosogra]

IF your build.gradle(:app) mihify & shrink ?

    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

THEN add in your project proguard-rules.pro:

-keep class rawbt.** { *; }

Thank you 😊
Issue solved
Proguard was the problem

[amosogra]

update implementation 'com.github.402d:RawbtAPI:9238fdefc6'

Is it help (without strings from previus answer)?

The previous answer solved it for me. Thank you 😊

[amosogra]

BTW I crested a Flutter plugin for android with this library.

Check it out ✔