ReactNative 集成 react-native-baidumap-sdk，android Kotlin编译报错

Question

问题描述

RN项目，集成 react-native-baidumap-sdk 报错，（同时在ios 做了集成，没有问题。）

由于从前端转做RN开发，不懂Android 也不懂 Kotlin,这问题在 google 搜了很久都没找到答案，我现在完全是懵逼状态。。完全不知道从何处下手排查这个问题。

如果还需要其他相关信息 我随时可以提供。

错误如下：

> Configure project :react-native-baidumap-sdk
WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.
It will be removed at the end of 2018. For more information see: http://d.android.com/r/tools/update-dependency-configurations.html

> Configure project :react-native-webview
:react-native-webview:reactNativeAndroidRoot /project/node_modules/react-native/android
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/Utils.kt: (52, 35): T
ype inference failed. Expected type mismatch: inferred type is List<LatLng?> but List<LatLng> was expected
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapHeatMap.kt: (20, 43): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapHeatMap.kt: (20, 67): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapHeatMap.kt: (21, 38): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (156, 19): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (157, 43): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (157, 60): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (160, 19): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (161, 41): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (164, 19): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (165, 45): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (168, 19): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (169, 43): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (172, 19): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (173, 31): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (173, 47): Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type ReadableMap?
e: /project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapView.kt: (177, 13): Type mismatch: inferred type is Boolean? but Boolean was expected

> Task :react-native-baidumap-sdk:compileDebugKotlin FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':react-native-baidumap-sdk: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

/project/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/Utils.kt: (52, 35)

/Users/dizhang/Workspace/rn/ReactNativeBaseFramework/node_modules/react-native-baidumap-sdk/lib/android/src/main/java/cn/qiuxiang/react/baidumap/mapview/BaiduMapHeatMap.kt: (20, 43)

其中两个文件是这样的。其他都差不多。

环境

system:macos 10.14

"react": "16.8.3",
"react-native": "0.59.5",
"react-native-baidumap-sdk": "^0.6.1-2",

build.gradle

buildscript {
    ext {
        buildToolsVersion = "28.0.3"
        minSdkVersion = 16
        compileSdkVersion = 28
        targetSdkVersion = 28
        supportLibVersion = "28.0.0"
        kotlin_version = "1.3.10"
    }
    repositories {
        google()
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

Answer 1

我这里检测发现是 Kotlin 语法的问题，

解决方法：在报错文件的对应参数后加两个感叹号

我这里是3个文件，分别是：
BaiduMapHeatMap.kt
BaiduMapView.kt
Utils.kt
比如 BaiduMapHeatMap.kt 文件修改如下：

fun setPoints(points: ReadableArray) {
    this.points = (0..(points.size() - 1))
        .map { points.getMap(it) }
        .map {
            val intensity = if (it!!.hasKey("intensity")) it!!.getDouble("intensity") else 0.0
            WeightedLatLng(it!!.toLatLng(), intensity)
        }
}

Answer 2

解决了吗解决了吗解决了吗解决了吗解决了吗