鸿蒙编译报错：Unable to find the java component with apiVersion 4.

问题现象

SdkError: DOWNLOAD_SDK_ERROR
	 > Cause: Unable to find the java component with apiVersion 4.
	 > Solution: 
		1.Open SDK Manager and download java.
		2.Alternatively, modify the compileSdkVersion settings in the project- and module-level build.gradle files. 

解决方案

修改build.gradle文件：

ohos {
    compileSdkVersion 4
    defaultConfig {
        compatibleSdkVersion 3
    }
}

改成：

ohos {
    compileSdkVersion 5
    defaultConfig {
        compatibleSdkVersion 3
    }
}