Hey guys, I am guessing this package does not work with flutter upgrade most recent vrs.

[Isonomic]

The current Dart SDK version is 2.1.0-dev.3.1.flutter-760a9690c2.

Because practice_app depends on location >=1.0.1 <1.4.1 which requires SDK version <2.0.0, version solving failed.
pub get failed (1)
exit code 1

[zanecidan]

Recent Flutter upgrade is making my app fail to compile too.

e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (168, 34): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (171, 36): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (172, 40): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (173, 37): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (174, 31): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (175, 28): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (177, 21): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (178, 66): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?

FAILURE: Build failed with an exception.

[codeXLinkX]

FAILURE: Build failed with an exception.

• What went wrong:
  The Android Gradle plugin supports only Kotlin Gradle plugin version 1.2.51 and higher. Project 'map_view' is using version 1.2.50.

[toregua]

Same for me :

Gradle task 'assembleDebug'...
Configuration 'androidTestCompile' in project ':app' is deprecated. Use 'androidTestImplementation' instead.
Configuration 'compile' in project ':app' is deprecated. Use 'implementation' instead.
registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (168, 34): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (171, 36): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (172, 40): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (173, 37): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (174, 31): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (175, 28): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (177, 21): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (178, 66): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':map_view: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.

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

BUILD FAILED in 30s

Flutter doctor :

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel master, v0.10.1-pre.11, on Microsoft Windows [version 10.0.17134.345], locale fr-FR)
[√] Android toolchain - develop for Android devices (Android SDK 27.0.3)
[√] Android Studio (version 3.1)
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.
[!] VS Code (version 1.26.1)
[!] VS Code, 64-bit edition (version 1.27.2)
[√] Connected device (1 available)

[ashoksl]

Facing the same issue

[91priyansh]

The Android Gradle plugin supports only Kotlin Gradle plugin version 1.2.51 and higher. Project 'map_view' is
using version 1.2.50.

I am facing this issue, Anyone got solution for this problem?

[ZackPashkin]

have the same issue

[DDvoretskikh]

The package was perfectly working until I updated Flutter. Now I am getting the same error as @zanecidan every time I try to run the app in a device.

Does anyone know how to fix this? Many thanks in advance!

[sdresche17]

I'm getting the same error

[ashoksl]

I've faced the same issue.

In android build.gradle,

`buildscript {
ext.kotlin_version = '1.2.50'
repositories {
google()
jcenter()
}

dependencies {
    classpath 'com.android.tools.build:gradle:3.1.0'
    classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.50'
}

}`

This worked for me.

And following is my pubspec.yaml.

`
dependencies:
flutter:
sdk: flutter

flutter_sparkline: "^0.1.0"
flutter_staggered_grid_view: "^0.2.3"
font_awesome_flutter: "^8.1.0"
map_view: ^0.0.14
`

[DDvoretskikh]

In android build.gradle,

`buildscript {
ext.kotlin_version = '1.2.50'
repositories {
google()
jcenter()
}

dependencies {
    classpath 'com.android.tools.build:gradle:3.1.0'
    classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.50'
}

}`

This worked for me.

I applied your changes but didn't work. Maybe there is something else missing?

[sjmcdowall]

Same issue -- sigh ...

[JTorrus]

Recent Flutter upgrade is making my app fail to compile too.

e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (168, 34): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (171, 36): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (172, 40): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (173, 37): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (174, 31): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (175, 28): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (177, 21): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?
e: C:\src\flutter\flutter_windows_v0.5.1-beta\flutter.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview\MapViewPlugin.kt: (178, 66): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Map<String, Any>?

FAILURE: Build failed with an exception.

For people having this issue I found a possible fix for now.

1. Open the Android project and go to the MapView module, then select MapViewPlugin.kt inside the java folder (This should be the file path: /.pub-cache/hosted/pub.dartlang.org/map_view-0.0.14/android/src/main/kotlin/com/apptreesoftware/mapview/MapViewPlugin.kt)

2. If you are using Android Studio you will already see red warnings. Go to line 168 where you'll find val cameraDict = mapOptions["cameraPosition"] as Map<String, Any>

3. Change it to this val cameraDict = mapOptions!!["cameraPosition"] as Map<String, Any>

Now it should work.

[DDvoretskikh]

Many thanks @JTorrus ! Your solution worked perfectly!

In case that you are using Visual Studio Code, you have to follow @JTorrus 's solution but finding MapViewPlugin file in this path:

<YOUR_FLUTTER_PATH>.pub-cache\hosted\pub.dartlang.org\map_view-0.0.14\android\src\main\kotlin\com\apptreesoftware\mapview