如何在Android Studio中添加.so,.mk和其他原生文件？

Question

我要在Android Studio的Project中添加原生文件.so,.mk,.sh,.cpp.在eclipse .so文件中添加了libs文件夹和jni和obj文件夹中的其他文件,并且一切正常.但是在Android工作室中我已经在jniLibs文件夹中添加了.so文件,并在.gradle文件中进行了如下更改

 ndk{
                abiFilters 'armeabi', 'armeabi-v7a', 'x86'
            }
sourceSets.main {
        jniLibs.srcDir 'src/main/libs' //set libs as .so's location instead of jniLibs
        jni.srcDirs = [] //disable automatic ndk-build call with auto-generated Android.mk
    }

下面是我的项目结构和我需要添加的文件.有jni和obj文件夹包含本机代码,我将使用它.

我已经看到了可用的链接,但它们已经过时,没有任何效果.任何帮助表示赞赏.

执行以下更改后记录:

sourceSets.main {
        jniLibs.srcDir 'src/main/libs' //set libs as .so's location instead of jniLibs
        jni.srcDirs = [] //disable automatic ndk-build call with auto-generated Android.mk
    }
    externalNativeBuild {
        ndkBuild {
            path 'src/main/jni/Android.mk'
        }
    }

日志:

Error while executing 'E:\Android_SDK\ndk-bundle\ndk-build.cmd' with arguments {NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=E:\folder\sampleapp\app\src\main\jni\Android.mk NDK_APPLICATION_MK=E:\folder\sampleapp\app\src\main\jni\Application.mk APP_ABI=armeabi-v7a NDK_ALL_ABIS=armeabi-v7a NDK_DEBUG=1 APP_PLATFORM=android-16 NDK_OUT=E:/folder/app/build/intermediates/ndkBuild/debug/obj NDK_LIBS_OUT=E:\folder\sampleapp\app\build\intermediates\ndkBuild\debug\lib APP_SHORT_COMMANDS=false LOCAL_SHORT_COMMANDS=false -B -n}
md "E:\folder\sampleapp\app\build\intermediates\ndkBuild\debug\lib\armeabi-v7a" >NUL 2>NUL || rem
copy /b/y "E:\Android_SDK\ndk-bundle\build\\..\prebuilt\android-arm\gdbserver\gdbserver" "E:\folder\sampleapp\app\build\intermediates\ndkBuild\debug\lib\armeabi-v7a\gdbserver" > NUL
E:/Android_SDK/ndk-bundle/build//../prebuilt/windows-x86_64/bin/echo.exe [armeabi-v7a] "Gdbserver      ": "[arm-linux-androideabi] E:\folder\sampleapp\app\build\intermediates\ndkBuild\debug\lib/armeabi-v7a/gdbserver"
E:/Android_SDK/ndk-bundle/build//../prebuilt/windows-x86_64/bin/echo.exe [armeabi-v7a] "Gdbsetup       ": "E:\folder\sampleapp\app\build\intermediates\ndkBuild\debug\lib/armeabi-v7a/gdb.setup"
E:/Android_SDK/ndk-bundle/build//../prebuilt/windows-x86_64/bin/echo.exe "directory E:/Android_SDK/ndk-bundle/build//../platforms/android-16/arch-arm/usr/include E:/folder/app/src/main/jni E:/Android_SDK/ndk-bundle/build//../sources/cxx-stl/system" >> E:\folder\sampleapp\app\build\intermediates\ndkBuild\debug\lib/armeabi-v7a/gdb.setup
E:/Android_SDK/ndk-bundle/build//../prebuilt/windows-x86_64/bin/echo.exe "set solib-search-path E:/folder/app/build/intermediates/ndkBuild/debug/obj/local/armeabi-v7a" > E:\folder\sampleapp\app\build\intermediates\ndkBuild\debug\lib/armeabi-v7a/gdb.setup
process_begin: CreateProcess(NULL, "", ...) failed.
make: *** No rule to make target `E:/folder/app/src/main/jni/SerialPort.c', needed by `E:/folder/app/build/intermediates/ndkBuild/debug/obj/local/armeabi-v7a/objs-debug/serial_port/SerialPort.o'.  Stop.
Build command failed.
Error:executing external native build for ndkBuild E:\folder\sampleapp\app\src\main\jni\Android.mk
Build command failed.
Error while executing 'E:\Android_SDK\ndk-bundle\ndk-build.cmd' with arguments {NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=E:\folder\sampleapp\app\src\main\jni\Android.mk NDK_APPLICATION_MK=E:\folder\sampleapp\app\src\main\jni\Application.mk APP_ABI=armeabi-v7a NDK_ALL_ABIS=armeabi-v7a NDK_DEBUG=0 APP_PLATFORM=android-16 NDK_OUT=E:/folder/app/build/intermediates/ndkBuild/release/obj NDK_LIBS_OUT=E:\folder\sampleapp\app\build\intermediates\ndkBuild\release\lib APP_SHORT_COMMANDS=false LOCAL_SHORT_COMMANDS=false -B -n}
make: *** No rule to make target `E:/folder/app/src/main/jni/SerialPort.c', needed by `E:/folder/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/objs/serial_port/SerialPort.o'.  Stop.
process_begin: CreateProcess(NULL, "", ...) failed.
Error:executing external native build for ndkBuild E:\folder\sampleapp\app\src\main\jni\Android.mk

Answer 1

首先,确保您的源位置,套件示例.你有一些问题.所有本机文件都应该在src/main/

../src/main
.........../jni # your cpp, header and mk files
.........../jniLibs # your folders with all libs
.........../java # other code

然后,确保在任何Native使用之前,在Activity,Application等中,在静态字段中加载libs.

private static final String LIB_NAME = "libserial_port";
private static final String LIB_NAME_1 = "libzqcom";
static {
        System.loadLibrary(LIB_NAME);
        System.loadLibrary(LIB_NAME_1);
    }

UPD 1:

确保您已经为原生Android项目安装了Android NDK Source.