Question

我创建了一个具有C ++支持的新Android Studio项目，但没有添加任何内容。该项目使用CMake进行构建，编译和运行。然后，我将以下两行代码添加到文件底部的import requests from bs4 import BeautifulSoup url = 'https://epaper.thehindu.com/' req_url = 'https://epaper.thehindu.com/Login/ValidateLogin' with requests.Session() as session: res = session.get(url) soup = BeautifulSoup(res.text,"lxml") payload={ '__RequestVerificationToken':soup.select_one("[name='__RequestVerificationToken']")['value'], 'Email':'', #your email 'Password':'', #your password 'hiddenTab':'' } r = session.post(req_url,data=payload) soup = BeautifulSoup(r.text,"lxml") print(soup.title)中，并收到CMake构建错误。

CMakeLists.txt

这是我在构建项目时遇到的错误

find_package(Java COMPONENTS Development)       # Line 47
find_package(JNI REQUIRED)                      # Line 48

CMake在从命令行调用时运行，但是由于某些原因在Android Studio中失败，我不确定为什么。

编辑1

这是CMakeOutput.log文件

编辑2

这就是-- Found Java: /usr/lib/jvm/java-10-oracle/bin/java (found version "10.0.1") found components: Development -- Configuring incomplete, errors occurred! CMake Error at /home/xxxxx/Android/Sdk/cmake/3.6.4111459/share/cmake-3.6/Modules/FindPackageHandleStandardArgs.cmake:148 (message): Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY See also "/home/xxxxx/AndroidStudioProjects/MyApplication/app/.externalNativeBuild/cmake/release/x86_64/CMakeFiles/CMakeOutput.log". JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH) Call Stack (most recent call first): /home/xxxxxx/Android/Sdk/cmake/3.6.4111459/share/cmake-3.6/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE) /home/xxxxxx/Android/Sdk/cmake/3.6.4111459/share/cmake-3.6/Modules/FindJNI.cmake:314 (FIND_PACKAGE_HANDLE_STANDARD_ARGS) CMakeLists.txt:48 (find_package) External native generate JSON release: JSON generation completed with problems文件中的所有内容。它使用cmake命令在cmd中编译。

CMakeLists.txt

这是cmd输出

cmake_minimum_required(VERSION 3.4.1)

find_package(Java COMPONENTS Development)
find_package(JNI REQUIRED)

当我尝试使用gradle在Android Studio中对其进行编译时，在Windows 10专业版64位操作系统上出现以下错误

    E:\Users\xxxxx\AndroidStudioProjects\MyApplication\app\build>cmake ..
-- Configuring done
-- Generating done
-- Build files have been written to: E:/Users/xxxxx/AndroidStudioProjects/MyApplication/app/build

Answer 1

与Android捆绑在一起的CMake版本试图告诉您，由于缺少某些部分，它找不到JNI软件包：

missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH

在文档中查找FindJNI（https://cmake.org/cmake/help/latest/module/FindJNI.html），将这些变量设置为Android版本的JNI未附带的库和标头的位置（不足为奇，例如，Android不包含AWT库）。运行find_package(JNI REQUIRED)时，FindJNI代码检查是否设置了这些变量，如果没有设置，则发出错误。

一种解决方法是在调用find_package之前自行设置这些变量：

# We are only interested in finding jni.h: we do not care about extended JVM
# functionality or the AWT library.
set(JAVA_AWT_LIBRARY NotNeeded)
set(JAVA_JVM_LIBRARY NotNeeded)
set(JAVA_INCLUDE_PATH2 NotNeeded)
set(JAVA_AWT_INCLUDE_PATH NotNeeded)
find_package(JNI REQUIRED)

但是请注意，您的代码将只能使用 jni.h 及其功能：如果尝试访问JNI包的任何其他部分，它将失败（可能在编译时）），因为实际上，您欺骗CMake认为找到了整个软件包，而实际上其中只有一部分存在于Android设置中。

Answer 2

class Widget:
    pass

class Dialog:
    def __getattr__(name) -> Widget:
        pass

已解决

Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY

Answer 3

与alpine：edge码头工人映像相同，已使用：

ENV JAVA_HOME=/usr/lib/jvm/java-1.8-openjdk
RUN apk add --no-cache openjdk8

ref：https://pkgs.alpinelinux.org/contents?branch=edge&name=openjdk8&arch=x86_64&repo=community

CMake找不到JNI

3 个答案: