Android Studio NDK编译配置

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Android app开发因为效率、跨平台、安全等考虑，常常将核心模块用c/c++实现然后通过jni接口跟java交互。Android Studio下采用c/c++和java协同开发需要做以下修改：

1.build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "zhw.jpegclapp"
        minSdkVersion 21
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        ndk {
            moduleName "libjpegNativeLib"
            ldLibs "log", "z", "m"
            abiFilters  "armeabi-v7a"
        }
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    externalNativeBuild {
        ndkBuild {
            path 'src/main/cpp/Android.mk'
        }
    }
}

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:appcompat-v7:25.0.1'
    testCompile 'junit:junit:4.12'
}

2.ndk中要使用__android_log_print 打印：

在Android.mk中加入

LOCAL_LDLIBS+= -L$(SYSROOT)/usr/lib -llog