/* DO NOT EDIT THIS FILE - it is machine generated */#include <jni.h>/* Header for class com_kissdream_androidjnitest_myJNIUtils */#ifndef _Included_com_kissdream_androidjnitest_myJNIUtils#define _Included_com_kissdream_androidjnitest_myJNIUtils#ifdef __cplusplusextern "C" {#endif/* * Class:   com_kissdream_androidjnitest_myJNIUtils * Method:  getName * Signature: ()Ljava/lang/String; */JNIEXPORT jstring JNICALL Java_com_kissdream_androidjnitest_myJNIUtils_getName (JNIEnv *, jobject);#ifdef __cplusplus}#endif#endif

#include "com_kissdream_androidjnitest_myJNIUtils.h"JNIEXPORT jstring JNICALL Java_com_kissdream_androidjnitest_myJNIUtils_getName    (JNIEnv * env, jobject obj){//如果是用C語言格式就用這種方式//  return (*env)->NewStringUTF(env,"Kiss dream");  //如果是用C語言格式就用這種方式return env->NewStringUTF((char *)"Kiss dream");}

public class myJNIUtils {  static {    //名字注意，需要跟你的build.gradle ndk節點下面的名字一樣    System.loadLibrary("NameProvider");  }  //JNI接口需要用native關鍵字修飾  public native String getName();}

ndk {    moduleName "NameProvider"  }

Error:Execution failed for task ':app:compileDebugNdk'.> Error: Flag android.useDeprecatedNdk is no longer supported and will be removed in the next version of Android Studio. Please switch to a supported build system. Consider using CMake or ndk-build integration. For more information, go to:  https://d.android.com/r/studio-ui/add-native-code.html#ndkCompile  To get started, you can use the sample ndk-build script the Android  plugin generated for you at:  /Users/apple/Desktop/AndroidJNITest/app/build/intermediates/ndk/debug/Android.mk Alternatively, you can use the experimental plugin:  https://developer.android.com/r/tools/experimental-plugin.html To continue using the deprecated NDK compile for another 60 days, set  android.deprecatedNdkCompileLease=1512283120054 in gradle.properties

// 使用Cmake工具    externalNativeBuild {      cmake {        cppFlags ""        //生成多個版本的so文件        abiFilters 'arm64-v8a','armeabi-v7a','x86','x86_64'      }    }

// 配置CMakeLists.txt路徑  externalNativeBuild {    cmake {      path "CMakeLists.txt"  // 設置所要編寫的c源碼位置，以及編譯后so文件的名字    }  }

# For more information about using CMake with Android Studio, read the# documentation: https://d.android.com/studio/projects/add-native-code.html# Sets the minimum version of CMake required to build the native library.#CMakeLists.txtcmake_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 them for you.# Gradle automatically packages shared libraries with your APK.add_library( # Sets the name of the library.      # 設置so文件名稱.       NameProvider       # Sets the library as a shared library.       SHARED       # 設置這個so文件為共享.       # Provides a relative path to your source file(s).       # 設置這個so文件為共享.       src/main/jni/getName.cpp)# Searches for a specified prebuilt library and stores the path as a# variable. Because CMake includes system libraries in the search path by# default, you only need to specify the name of the public NDK library# you want to add. CMake verifies that the library exists before# completing its build.find_library( # Sets the name of the path variable.       log-lib       # Specifies the name of the NDK library that       # you want CMake to locate.       log )# Specifies libraries CMake should link to your target library. You# can link multiple libraries, such as libraries you define in this# build script, prebuilt third-party libraries, or system libraries.target_link_libraries( # Specifies the target library.            # 制定目標庫.            NameProvider            # Links the target library to the log library            # included in the NDK.            ${log-lib} )