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android - 在 Android Studio 3.x 和 CMake 中静态链接库

问题描述

首先，这是我的错误。

Build command failed.
Error while executing process /Users/{user}/Library/Android/sdk/cmake/3.6.4111459/bin/cmake with arguments {--build /Users/{user}/Desktop/android/app/.externalNativeBuild/cmake/debug/arm64-v8a --target native-lib}
ninja: error: 'src/main/jniLibs/zlib/arm64-v8a/lib/libz.a', needed by '../../../../build/intermediates/cmake/debug/obj/arm64-v8a/libnative-lib.so', missing and no known rule to make it

我为每个 ARCH（armeabi、armeabi-v7a、arm64-v8a、x86、x86_64）都有一个静态链接的预构建 zlib.a 库，并像这样放置库。

app/src/main/jniLibs/zlib/${ANDROID_ABI}/include/zlib.h
app/src/main/jniLibs/zlib/${ANDROID_ABI}/lib/libz.a

这是我的 CMakeLists.txt

cmake_minimum_required(VERSION 3.4.1)

add_library(native-lib SHARED src/main/cpp/native-lib.cpp)

add_library(libz STATIC IMPORTED)

set_target_properties(libz PROPERTIES IMPORTED_LOCATION src/main/jniLibs/zlib/${ANDROID_ABI}/lib/libz.a)

include_directories(src/main/jniLibs/zlib/${ANDROID_ABI}/include)

find_library(log-lib log)

target_link_libraries(native-lib libz ${log-lib})

在 Java 文件中，

static {
    System.loadLibrary("libz");
    System.loadLibrary("native-lib");
}

我不知道这个问题。好像没问题。我不碰 build.gradle，应该吗？我错过了什么？什么是问题？

标签： androidgradlecmakeandroid-ndkandroid-studio-3.0

解决方案

Property IMPORTED_LOCATION should be an absolute path.

Use ${CMAKE_CURRENT_SOURCE_DIR} for refer to the directory with currently processed CMakeLists.txt:

set_target_properties(libz PROPERTIES
  IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/zlib/${ANDROID_ABI}/lib/libz.a)

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