React Native 真机运行调错(Android 篇)

矫情吗；* 2022-05-08 01:06 109阅读 0赞

跟着官方教程撸完一个[电影列表][Link 1]的demo，就想配置到真机上看看效果，这里列一些遇到的坑。

### bug: SDK location not found. ###

具体的错误信息：

Building and installing the app on the device (cd android && ./gradlew installDebug)...
    Starting a Gradle Daemon (subsequent builds will be faster)
    
    FAILURE: Build failed with an exception.
    
    * What went wrong:
    A problem occurred configuring project ':app'.
    > SDK location not found. Define location with sdk.dir in the local.properties file or with an ANDROID_HOME environment variable.

#### 解决方案 ####

出错的原因是没有指定 SDK location

**步骤：**

1.  切到你的 React Native 项目目录下的 `android/` 文件夹；
2.  创建一个叫 `local.properties` 的文件，新文件里敲上下面这行：

sdk.dir = /Users/USERNAME/Library/Android/sdk

**注**： **`USERNAME` 是你的 OSX 用户名！**

> [React Native android build failed. SDK location not found][]

### bug: com.android.builder.testing.api.DeviceException ###

具体错误信息：

FAILURE: Build failed with an exception.
    
    * What went wrong:
    Execution failed for task ':app:installDebug'.
    > com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException

这个是手机在安装app时，需要手动点击控制app的安装，或者是没有解除手机对安装app来源的限制。

[Link 1]: https://reactnative.cn/docs/sample-application-movies/
[React Native android build failed. SDK location not found]: https://stackoverflow.com/questions/32634352/react-native-android-build-failed-sdk-location-not-found