使用Android Studo开发NDK之Gradle的配置(能debug C代码)

配置：

用的版本号是AS1.5（也能够尝试更高版本号）。 Gradle地址是distributionUrl=https\://services.gradle.org/distributions/gradle-2.8-all.zip

NDK用的是CrystaX NDK

有參考：https://github.com/TsinStudio/AndroidDev/blob/master/Android%20NDK%20C%2B%2B%20开发利器：Android%20Studio.md


常见问题：
1.我在mk的NDK配置和gradle的NDK配置间切换时，突然不能debug进C++代码了。然后通过
清空main/jni/android.mk文件，
点击build->clean,
在debug界面右键tab标题（如 ctbManager Native)->close tab(关闭全部debug的tab）后又能debug进去了，
不知道是哪一步fix了问题。假设遇到编译成功但不能debug C++文件，尝试这几个步骤吧。同一时候不建议mk和gradle配置之间切换。
2.假设C文件报错。考虑能否改动C文件，比解决报错要简单

gradle代码:

import org.apache.tools.ant.taskdefs.condition.Os
import org.gradle.internal.os.OperatingSystem;

apply plugin: 'com.android.model.application'

final APP_ABIS = ["armeabi", "armeabi-v7a","arm64-v8a"]
final BOOST_SHARED_LIBS = ["boost_serialization","boost_system","boost_filesystem","boost_thread"]

model {

android {
compileSdkVersion = 23
buildToolsVersion = "23.0.2"
defaultConfig.with {
applicationId = "com.duotin.ctblib"
minSdkVersion.apiLevel = 15
targetSdkVersion.apiLevel = compileSdkVersion.asType(Integer)
versionCode = 1
versionName = "1.0"
}
}

android.ndk {
toolchain = "gcc"
toolchainVersion = "4.9"
moduleName = "ctblib"
cppFlags.add("-std=c++11")
cppFlags.add("-fexceptions")
cppFlags.add("-frtti")
cppFlags.add("-I" + getBoostIncDir())
cppFlags.addAll(["-fvisibility=hidden", "-Wno-error=format-security",
"-I${file("src/main/jni/jnisrc")}".toString(),
"-I${file("src/main/jni/src/Jelly")}".toString(),
"-I${file("src/main/jni/src/Papaya")}".toString(),
"-I${file("src/main/jni/src/Helper")}".toString(),
"-I${file("src/main/jni/src/Helper/utf8")}".toString(),
"-I${file("src/main/jni/src/CTBModel")}".toString(),
"-I${file("src/main/jni/src/CTBModel/CTBAlbum")}".toString(),
"-I${file("src/main/jni/src/CTBModel/CTBAlbumParser")}".toString(),
"-I${file("src/main/jni/src/CTBModel/CTBBaseModel")}".toString(),
"-I${file("src/main/jni/src/CTBModel/CTBTrack")}".toString(),
"-I${file("src/main/jni/src/Xml")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel/XmlAttrNode")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel/XmlBaseNode")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel/XmlElementNode")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel/XmlTextNode")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlUtil")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlUtil/BoostXmlUtil")}".toString(),
"-I${file("src/main/jni/src/Module")}".toString(),
"-I${file("src/main/jni/src/CTBDataManager")}".toString(),
"-I${file("src/main/jni/src/Sync/SyncProcess")}".toString(),
"-I${file("src/main/jni/src/Sync/Task")}".toString(),
"-I${file("src/main/jni/src/SyncLog")}".toString(),
"-I${file("src/main/jni/src/Utils")}".toString()]
)
cppFlags.add("-I${file("src/main/jni/neon/include")}".toString())
CFlags.addAll(["-I${file("src/main/jni/jnisrc")}".toString(),
"-I${file("src/main/jni/src/Jelly")}".toString(),
"-I${file("src/main/jni/src/Papaya")}".toString(),
"-I${file("src/main/jni/src/Helper")}".toString(),
"-I${file("src/main/jni/src/Helper/utf8")}".toString(),
"-I${file("src/main/jni/src/CTBModel")}".toString(),
"-I${file("src/main/jni/src/CTBModel/CTBAlbum")}".toString(),
"-I${file("src/main/jni/src/CTBModel/CTBAlbumParser")}".toString(),
"-I${file("src/main/jni/src/CTBModel/CTBBaseModel")}".toString(),
"-I${file("src/main/jni/src/CTBModel/CTBTrack")}".toString(),
"-I${file("src/main/jni/src/Xml")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel/XmlAttrNode")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel/XmlBaseNode")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel/XmlElementNode")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlModel/XmlTextNode")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlUtil")}".toString(),
"-I${file("src/main/jni/src/Xml/XmlUtil/BoostXmlUtil")}".toString(),
"-I${file("src/main/jni/src/Module")}".toString(),
"-I${file("src/main/jni/src/CTBDataManager")}".toString(),
"-I${file("src/main/jni/src/Sync/SyncProcess")}".toString(),
"-I${file("src/main/jni/src/Sync/Task")}".toString(),
"-I${file("src/main/jni/src/SyncLog")}".toString(),
"-I${file("src/main/jni/src/Utils")}".toString(),
"-I${file("src/main/jni/neon//external/android")}".toString(),
"-I${file("src/main/jni/neon/external/openssl/include/openssl")}".toString(),
"-I${file("src/main/jni/neon/external/openssl/include")}".toString(),
"-I${file("src/main/jni/neon/external/expat/include")}".toString(),
"-I${file("src/main/jni/src/SyncLog")}".toString(),
"-I${file("src/main/jni/src/SyncLog")}".toString(),
"-I${file("src/main/jni/src/SyncLog")}".toString(),
"-I${file("src/main/jni/src/SyncLog")}".toString(),
"-I${file("src/main/jni/src/SyncLog")}".toString(),
"-I${file("src/main/jni/src/SyncLog")}".toString()])
CFlags.addAll(["-DDEBUG"])
ldLibs.addAll BOOST_SHARED_LIBS
ldLibs.addAll(["log", "m", "z"])
ldFlags.addAll(["-llog","-fvisibility=hidden","-L/usr/lib ","-lm"])
stl = "gnustl_shared"
}

android.buildTypes {
release {
minifyEnabled = false
proguardFiles.add(file('proguard-rules.pro'))
}
}

android.sources {
main {
jni {
source {
srcDir "src/main/jni"
dependencies {
APP_ABIS.each { abi ->
library file("src/main/jni/neonlib/${abi}/libneon.a") abi "${abi}"
library file("src/main/jni/neon/external/expat/${abi}/libexpat.a") abi "${abi}"
library file("src/main/jni/openssllib/${abi}/libcrypto.so") abi "${abi}"
library file("src/main/jni/openssllib/${abi}/libssl.so") abi "${abi}"
}
}
}
}
jniLibs {
source {
srcDir "src/main/libs"
}
}
}
}

android.productFlavors {
APP_ABIS.each { abi ->
create(getFlavorName(abi)) {
ndk.with {
abiFilters.add(abi)
getPrebuiltLibPaths(abi).each { path ->
ldFlags.add("-L" + path)
}
}
}
}
}
}

tasks.all {

task ->
println "printTask#${task}"
if (task.name.startsWith('link')) {
println "${task.name}.startsWith('link')"
task.dependsOn copyNativeLibs
}
}

task copyNativeLibs {
["debug", "release"].each { buildType ->
APP_ABIS.each { abi ->
def libs = [:]
BOOST_SHARED_LIBS.each { name ->
libs[name] = "${getBoostLibDir(abi)}/lib${name}.so"
}
libs.crystax = getLibCrystax(abi)

libs.each { name, file ->
dependsOn tasks.create(name: "copy-native-library-${name}-${abi}-${buildType}", type: Copy) {
from file
into getTargetLibDir(abi, buildType)
}
}
}
}
}

task stripNativeLibs(dependsOn: copyNativeLibs) {
["debug", "release"].each { buildType ->
APP_ABIS.each { abi ->
def libs = []
libs.addAll(BOOST_SHARED_LIBS)
libs += "crystax"

libs.each { name ->
dependsOn tasks.create(name: "strip-native-library-${name}-${abi}-${buildType}", type: Exec) {
commandLine getStripExecutable(abi), "--strip-unneeded", "${getTargetLibDir(abi, buildType)}/lib${name}.so"
}
}

}
}
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile project(':ApiClient')
compile 'de.greenrobot:eventbus:2.4.0'
}

def getNdkDir() {
if (System.env.ANDROID_NDK_ROOT != null)
return System.env.ANDROID_NDK_ROOT

Properties properties = new Properties()
properties.load(project.rootProject.file('local.properties').newDataInputStream())
def ndkdir = properties.getProperty('ndk.dir', null)
if (ndkdir == null)
throw new GradleException("""\
NDK location not found.
Define location with ndk.dir in the local.properties file
or with an ANDROID_NDK_ROOT environment variable.""")

return ndkdir
}

def getCrystaxNdkDir() {
def ndkDir = getNdkDir()
if (!(new File(ndkDir, "sources/crystax").exists()))
throw new GradleException("""\
'${ndkDir}' is not a CrystaX NDK.
Edit ndk.dir in local.properties or set ANDROID_NDK_ROOT
environment variable pointing to CrystaX NDK""")

return ndkDir
}

def getFlavorName(abi) {
switch (abi) {
case "armeabi":
return "arm";
case "armeabi-v7a":
return "arm7"
case "arm64-v8a":
return "arm64"
default:
return abi.replaceAll('-', '_')
}
}

def getToolchainName(abi) {
switch (abi) {
case ~/^armeabi.*/:
return "arm-linux-androideabi"
case ~/^arm64.*/:
return "aarch64-linux-android"
case "mips":
return "mipsel-linux-android"
case "mips64":
return "mips64el-linux-android"
case ["x86", "x86_64"]:
return abi
default:
throw new GradleException("Unsupported ABI: '${abi}'")
}
}

def getToolchainPrefix(abi) {
switch (abi) {
case ~/^armeabi.*/:
return "arm-linux-androideabi"
case ~/^arm64.*/:
return "aarch64-linux-android"
case "mips":
return "mipsel-linux-android"
case "mips64":
return "mips64el-linux-android"
case "x86":
return "i686-linux-android"
case "x86_64":
return "x86_64-linux-android"
default:
throw new GradleException("Unsupported ABI: '${abi}'")
}
}

def getHostOS() {
if (OperatingSystem.current().isLinux())
return "linux"
if (OperatingSystem.current().isMacOsX())
return "darwin"
if (OperatingSystem.current().isWindows())
return "windows"
throw new GradleException("Unsupported host OS")
}

def getHostArch() {
def arch = System.getProperty("os.arch")
switch (arch) {
case ["x86_64", "amd64"]:
return "x86_64"
case ~/^i[3456]86/:
case "x86":
return "x86"
default:
throw new GradleException("Can't detect host's CPU architecture: '${arch}'")
}
}

def getHostTag() {
def tag = getHostOS()
def arch = getHostArch()
if (tag != "windows" || arch != "x86")
tag += "-${arch}"
return tag
}

def getStripExecutable(abi) {
def ndk = getCrystaxNdkDir()
def toolchainName = getToolchainName(abi)
def toolchainPrefix = getToolchainPrefix(abi)
def hostTag = getHostTag()
def strip = "${ndk}/toolchains/${toolchainName}-4.9/prebuilt/${hostTag}/bin/${toolchainPrefix}-strip"
if (OperatingSystem.current().isWindows())
strip = strip.replaceAll('/', '\\\\') + '.exe'
return strip
}

def getPrebuiltLibPaths(abi) {
def paths = []
paths += getBoostLibDir(abi)
paths += getLibCrystaxDir(abi)
return paths
}

def getTargetLibDir(abi, buildType) {
return "${buildDir}/intermediates/binaries/${buildType}/${getFlavorName(abi)}/lib/${abi}"
}

def getLibCrystaxDir(abi) {
return "${getCrystaxNdkDir()}/sources/crystax/libs/${abi}"
}

def getLibCrystax(abi) {
return "${getLibCrystaxDir(abi)}/libcrystax.so"
}

def getBoostDir() {
return "${getCrystaxNdkDir()}/sources/boost/1.58.0"
}

def getBoostIncDir() {
return "${getBoostDir()}/include"
}

def getBoostLibDir(abi) {
return "${getBoostDir()}/libs/${abi}"
}