google 官方現在推薦使用cmake來構建jni。

本人正好工作需要使用第三方的靜態庫和動態庫，寫此文 權當做個記錄。

首先修改app的build.gradle文件?

ndk {abiFilter 'armeabi' } externalNativeBuild {cmake {arguments '-DANDROID_PLATFORM=android-13','-DANDROID_TOOLCHAIN=clang', '-DANDROID_STL=gnustl_static' } }

externalNativeBuild {cmake {path 'src/main/cpp/CMakeLists.txt' } }sourceSets {main {// copy libusb1.0.so to APK jniLibs.srcDirs = ['/home/chenhf/libusb/android/libs']} } 創建CMakeLists.txt文件 # Sets the minimum version of CMake required to build the native # library. You should either keep the default value or only pass a # value of 3.4.0 or lower.cmake_minimum_required(VERSION 3.4.1)# Creates and names a library, sets it as either STATIC # or SHARED, and provides the relative paths to its source code. # You can define multiple libraries, and CMake builds it for you. # Gradle automatically packages shared libraries with your APK.set(LIBHARDWARE_DIR /home/chenhf/workspace/android/PSAMDemo/app/libhardware) add_library(hardware STATIC IMPORTED) set_target_properties(hardware PROPERTIES IMPORTED_LOCATION ${LIBHARDWARE_DIR}/${ANDROID_ABI}/libhardware.a)set(LIBUSB_DIR /home/chenhf/libusb/android/libs) add_library(usb SHARED IMPORTED) set_target_properties(usb PROPERTIES IMPORTED_LOCATION ${LIBUSB_DIR}/${ANDROID_ABI}/libusb1.0.so)set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")add_library(psamwrapper SHARED psamwrapper.cpp) target_link_libraries(psamwrapper hardware usb android log)最后會生成so文件,最終結果見下圖

總結

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