Android version won't compile

[patratacus]

Hello, this is an excellent USB HID library. I had no problems getting the example code to run on Windows and MacOS. I have issue with iOS not being able to load in the emulator but maybe that's a problem with the emulator. Unfortunately, the Android version couldn't get past the assembly process. This is the error I have:

e: C:...\flutter.pub-cache\hosted\pub.dartlang.org\hid_android-0.1.3\android\src\main\kotlin\com\rustui\hid_android\HidAndroidPlugin.kt: (72, 32): Expecting ')'
e: C:...\flutter.pub-cache\hosted\pub.dartlang.org\hid_android-0.1.3\android\src\main\kotlin\com\rustui\hid_android\HidAndroidPlugin.kt: (72, 32): Unexpected tokens (use ';' to separate expressions on the same line)
e: C:...\flutter.pub-cache\hosted\pub.dartlang.org\hid_android-0.1.3\android\src\main\kotlin\com\rustui\hid_android\HidAndroidPlugin.kt: (89, 55): Unresolved reference: i
e: C:...\flutter.pub-cache\hosted\pub.dartlang.org\hid_android-0.1.3\android\src\main\kotlin\com\rustui\hid_android\HidAndroidPlugin.kt: (89, 70): Unresolved reference: j

Looking at HIDAndroidPlugin.kt, I'm not sure why it's expecting another ')' since it didn't seem to miss one. The later errors on line 89 is actually interesting since the variable i and j are being called but I don't see that declared anywhere. I'm still ned to Kotlin so I'm not sure whether an undeclared variable could be used but I assume not.

"read" -> {
if (connection != null) {
val length: Int = call.argument("length")!!
val duration: Int = call.argument("duration")!!
Thread {
kotlin.run {
val array = ByteArray(length)
connection!!.bulkTransfer(
device!!.getInterface(i).getEndpoint(j),
array,
length,
duration

[rustui]

I don't know if the Android emulator can support it, I debug it on a real device.
i and j doesn't need to declare, see this.
This error may be because your kotlin version is too low, you can try to upgrade to the latest version.

[redDwarf03]

it works for me with ext.kotlin_version = '1.6.10'

[patratacus]

It was the iPhone that was on an emulator, but I know that it wouldn't work anyway since I don't think iPhone allows any USB HID through a port except maybe Blue Tooth on the iOS as far as I could tell. I'm trying to run the Android version on my Pixel 2XL. It's running Android 11 so hopefully, it's not too old. It never got past the assembly portion to even deploy onto the phone though. I checked my build.gradle file and it said that ext.kotlin_version = '1.6.10'. I think that's the latest version.

`buildscript {
ext.kotlin_version = '1.6.10'
repositories {
google()
mavenCentral()
}

dependencies {
    classpath 'com.android.tools.build:gradle:4.1.0'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}

}`

I'm using the latest Androdi Studio Bumbblebee 2021.1.1

[patratacus]

Here's the exact debug build error:

`Launching lib\main.dart on Pixel 2 XL in debug mode...
Running Gradle task 'assembleDebug'...
e: C:\Users\ptc48\Documents\flutter.pub-cache\hosted\pub.dartlang.org\hid_android-0.1.3\android\src\main\kotlin\com\rustui\hid_android\HidAndroidPlugin.kt: (72, 32): Expecting ')'
e: C:\Users\ptc48\Documents\flutter.pub-cache\hosted\pub.dartlang.org\hid_android-0.1.3\android\src\main\kotlin\com\rustui\hid_android\HidAndroidPlugin.kt: (72, 32): Unexpected tokens (use ';' to separate expressions on the same line)
e: C:\Users\ptc48\Documents\flutter.pub-cache\hosted\pub.dartlang.org\hid_android-0.1.3\android\src\main\kotlin\com\rustui\hid_android\HidAndroidPlugin.kt: (89, 55): Unresolved reference: i
e: C:\Users\ptc48\Documents\flutter.pub-cache\hosted\pub.dartlang.org\hid_android-0.1.3\android\src\main\kotlin\com\rustui\hid_android\HidAndroidPlugin.kt: (89, 70): Unresolved reference: j

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':hid_android:compileDebugKotlin'.

Compilation error. See log for more details

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 2s
Exception: Gradle task assembleDebug failed with exit code 1`

[EinarasGar]

I am getting the same error

[ivan-saorin]

I don't know if the Android emulator can support it, I debug it on a real device. i and j doesn't need to declare, see this. This error may be because your kotlin version is too low, you can try to upgrade to the latest version.

Just checked with ext.kotlin_version = '1.7.21'. Same error. It must be some other configuration.

[Musyimi97]

Can't run example app either, seems to be a gradle problem.

`* What went wrong:
A problem occurred evaluating root project 'android'.

A problem occurred configuring project ':app'.
Failed to notify project evaluation listener.
> compileSdkVersion is not specified. Please add it to build.gradle
> Cannot invoke method substring() on null object`

[selmanonal]

Anyone have a solution for this error? Here is the debug error:
e: C:\Users\selma\AppData\Local\Pub\Cache\hosted\pub.dev\hid_android-0.1.3\android\src\main\kotlin\com\rustui\hid_android\HidAndroidPlugin.kt: (72, 32): Expecting ')'

[ibaibing]

This issue can be resolved by modifying the open interface in HidAndroidPlugin.kt, as shown in the following code: "open" -> { device = usbManager.deviceList[call.argument("deviceName")]!! connection = usbManager.openDevice(device) val indices = getReadIndices(device!!) if (indices != null) { interfaceIndex = indices.first endpointIndex = indices.second } else { result.error("error", "Endpoints not found for the device", "") } result.success( connection!!.claimInterface( device!!.getInterface(interfaceIndex!!), true ) ) }
But even with this modification, it still cannot run because the implementation for the 'write' interface is still missing.