android开发-c++代码调用so库-白红宇

android开发-c++代码调用so库

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发布时间：2019-06-27

本文共 4984 字，大约阅读时间需要 16 分钟。

Android项目的CMakeLists.txt代码如下，so文件放在项目的$Project/app/src/main/jniLibs/$arch下， $arch替换为arm64-v8a armv7a等

cmake_minimum_required(VERSION 3.4.1) set(ARCH arch-arm64) set(libs_DIR /Users/musictom/libs/android/${ARCH}/usr/lib) set(libs_include_DIR /Users/musictom/libs/android/${ARCH}/usr/include)

add_library(ghttp-lib SHARED IMPORTED) set_target_properties(ghttp-lib PROPERTIES IMPORTED_LOCATION              ${libs_DIR}/libghttp.so)

add_library( # Sets the name of the library.              native-lib              # Sets the library as a shared library.              SHARED              # Provides a relative path to your source file(s).              src/main/cpp/native-lib.cpp )

target_link_libraries( # Specifies the target library.                        native-lib my-lib ghttp-lib pocofoundation-lib poconet-lib pocoutil-lib                        # Links the target library to the log library                        # included in the NDK.                        ${log-lib} ) app.gradle如下：

apply plugin: 'com.android.application' android {
      compileSdkVersion 25     buildToolsVersion "25.0.2"     defaultConfig {
          applicationId "com.example.musictom.andcpp"         minSdkVersion 21         targetSdkVersion 25         versionCode 1         versionName "1.0"         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"         externalNativeBuild {
              cmake {
                  cppFlags "-std=c++11 -frtti -fexceptions -I/Users/musictom/libs/android/arch-arm64/usr/include/"             }         }         ndk {
              // Specifies the ABI configurations of your native             // libraries Gradle should build and package with your APK.             //'x86', 'x86_64', abiFilters 'arm64-v8a'         }         // 设置so文件路径 so文件如果不在jniLibs目录下，需要在这里指定目录         //sourceSets {
          //    main {
          //        jniLibs.srcDirs = ['src/main/jni/arm64-v8a']         //    }         //}     }     buildTypes {
          release {
              minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     }     externalNativeBuild {
          cmake {
              path "CMakeLists.txt"         }     } } dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
          exclude group: 'com.android.support', module: 'support-annotations'     })     compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha7'     testCompile 'junit:junit:4.12' } native-lib.cpp代码如下：

#include 
    
      #include 
     
       #include 
      
        #include 
       
         #include 
        
          #include 
         
           #include 
          
            #include 
           
             #include 
            
              #include 
             
               #include 
              
                #include 
               
                 std::string get_ghttp() { /* This is the http request object */ ghttp_request *request = NULL; /* Allocate a new empty request object */ request = ghttp_request_new(); /* Set the URI for the request object */ ghttp_set_uri(request, "http://www.fuhan.org/wechat/verify"); /* Close the connection after you are done. */ ghttp_set_header(request, http_hdr_Connection, "close"); /* Prepare the connection */ ghttp_prepare(request); /* Process the request */ ghttp_process(request); /* Write out the body. Note that the body of the request may not be null terminated so we have to be careful of the length. */ //fwrite(ghttp_get_body(request), ghttp_get_body_len(request), 1, stdout); char* buf = ghttp_get_body(request); std::string s = buf; /* Destroy the request. This closes any file descriptors that may be open and will free any memory associated with the request. */ ghttp_request_destroy(request); return s; } extern std::string aa(); extern "C" JNIEXPORT jstring JNICALL Java_com_example_musictom_andcpp_MainActivity_stringFromJNI( JNIEnv* env, jobject /* this */) { std::string hello = "Hello from C++"; hello = aa(); std::string result; std::string responseText; if (false) { try { Poco::URI url("http://www.fuhan.org"); Poco::Net::HTTPClientSession session(url.getHost(), url.getPort()); //Poco::Net::HTTPClientSession s("www.cnblogs.com"); //Poco::Net::HTTPRequest request(Poco::Net::HTTPRequest::HTTP_GET, "/auroratony/archive/2012/06/06/2537516.html"); Poco::Net::HTTPRequest request(Poco::Net::HTTPRequest::HTTP_GET, "/wechat/verify", Poco::Net::HTTPRequest::HTTP_1_1); //request.set("/wechat/verify", ""); //Poco::Net::HTMLForm form; //form.add("entry1", "value1"); //form.prepareSubmit(request); session.sendRequest(request); Poco::Net::HTTPResponse response; std::istream &rs = session.receiveResponse(response); //Poco::StreamCopier copier; //copier.copyToString(rs, responseText); std::istreambuf_iterator
                
                  eos; std::string s(std::istreambuf_iterator
                 
                  (rs), eos); responseText = s; } catch (Poco::Net::NetException &ex) { result = ex.displayText(); responseText = "error:" + result; } } else { responseText = get_ghttp(); } return env->NewStringUTF(responseText.c_str()); }