Eclipse NDK Environment Building

Objective

Using the latest NDK, directly discard Cygwin, previously done Android projects to use the NDK will have to download the installation of Cygwin (simulated Linux environment), download the CDT (Eclipse C + + development plug-in), download the NDK, Also to configure the compiler, environment variables, especially troublesome, the new version is not required.

Tools

NDK, official because of the wall of bad reason open, in http://www.androiddevtools.cn/download

Configuration

1. System NDK environment variable configuration

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2.Eclipse Configuration Ndk

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3.Eclipse Configuration Javah tool automatically generates JNI header files

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#工作空间 ${project_loc} #工具执行参数-v-classpath ${project_loc}/bin/classes-d ${project_loc}/jni-jni ${java_type_name}

When using the Java file containing the native method, run Javah to generate the corresponding JNI header file in the JNI directory

4. new project with JNI

Create a new Android project, right-click Add native Support, will generate ANDROID.MK files and CPP files in the project directory

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5. Configure C, CPP header files and Ndk-build tools

Right-click Project--->properties

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Add environment variable Ndkroot, the value of the NDK root directory

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6.Log Information Printing

If there is a source environment, copy the System/core/inclue/cutils directory copy to {ndk-dir}/platforms/android- xx /arch-arm/usr/include

Copy out/target/product/ tcc893x /system/lib/libcutils.so, libutils.so to {ndk-dir}/platforms/android-xx/arch-arm/usr/lib

Add in Android.mk

local_shared_libraries:= libutils libcutils local_ldlibs: =-llog

then add the header file in the JNI cutils/log.h , you can use ALOGE/ALOGD/ALOGD

If you don't define yourself,

#include "android/log.h" static const char *tag= "Serial_port"; #define Logi (FMT, args ...) __android_log_print (android_ Log_info, Tag, FMT, # #args) #define LOGD (FMT, args ...) __android_log_print (android_log_debug, Tag, FMT, # #args) #define LO GE (FMT, args ...) __android_log_print (Android_log_error, TAG, FMT, # #args)

The above is about the Eclipse NDK build, quite simple, after the completion of the direct operation will automatically compile the JNI native code.

This article is from the "D.c_look" blog, make sure to keep this source http://doublewen.blog.51cto.com/3097132/1652624

Eclipse NDK Environment Building