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// This file provides basic support for building the TensorFlow demo
// in Android Studio with Gradle.
//
// Note that Bazel is still used by default to compile the native libs,
// and should be installed at the location noted below. This build file
// automates the process of calling out to it and copying the compiled
// libraries back into the appropriate directory.
//
// Alternatively, experimental support for Makefile builds is provided by
// setting nativeBuildSystem below to 'makefile'. This will allow building the demo
// on Windows machines, but note that full equivalence with the Bazel
// build is not yet guaranteed. See comments below for caveats and tips
// for speeding up the build, such as enabling ccache.
// NOTE: Running a make build will cause subsequent Bazel builds to *fail*
// unless the contrib/makefile/downloads/ and gen/ dirs are deleted afterwards.
// The cmake build only creates libtensorflow_demo.so. In this situation,
// libtensorflow_inference.so will be acquired via the tensorflow.aar dependency.
// It is necessary to customize Gradle's build directory, as otherwise
// it will conflict with the BUILD file used by Bazel on case-insensitive OSs.
project.buildDir = 'gradleBuild'
getProject().setBuildDir('gradleBuild')
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.3.0'
classpath 'org.apache.httpcomponents:httpclient:4.5.2'
}
}
allprojects {
repositories {
jcenter()
}
}
// set to 'bazel', 'cmake', 'makefile', 'none'
def nativeBuildSystem = 'bazel'
// Controls output directory in APK and CPU type for Bazel builds.
// NOTE: Does not affect the Makefile build target API (yet), which currently
// assumes armeabi-v7a. If building with make, changing this will require
// editing the Makefile as well.
// The CMake build has only been tested with armeabi-v7a; others may not work.
def cpuType = 'armeabi-v7a'
// Output directory in the local directory for packaging into the APK.
def nativeOutDir = 'libs/' + cpuType
// Default to building with Bazel and override with make if requested.
def nativeBuildRule = 'buildNativeBazel'
def demoLibPath = '../../../bazel-bin/tensorflow/examples/android/libtensorflow_demo.so'
def inferenceLibPath = '../../../bazel-bin/tensorflow/contrib/android/libtensorflow_inference.so'
if (nativeBuildSystem == 'makefile') {
nativeBuildRule = 'buildNativeMake'
demoLibPath = '../../../tensorflow/contrib/makefile/gen/lib/libtensorflow_demo.so'
inferenceLibPath = '../../../tensorflow/contrib/makefile/gen/lib/libtensorflow_inference.so'
}
// If building with Bazel, this is the location of the bazel binary.
// NOTE: Bazel does not yet support building for Android on Windows,
// so in this case the Makefile build must be used as described above.
def bazelLocation = '/usr/local/bin/bazel'
// import DownloadModels task
project.ext.ASSET_DIR = projectDir.toString() + '/assets'
project.ext.TMP_DIR = project.buildDir.toString() + '/downloads'
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "25.0.2"
if (nativeBuildSystem == 'cmake') {
defaultConfig {
applicationId = 'org.tensorflow.demo'
minSdkVersion 21
targetSdkVersion 23
ndk {
abiFilters "${cpuType}"
}
externalNativeBuild {
cmake {
arguments '-DANDROID_TOOLCHAIN=gcc', '-DANDROID_STL=gnustl_static'
}
}
}
externalNativeBuild {
cmake {
path './jni/CMakeLists.txt'
}
}
}
lintOptions {
abortOnError false
}
sourceSets {
main {
if (nativeBuildSystem == 'bazel' || nativeBuildSystem == 'makefile') {
// TensorFlow Java API sources.
java {
srcDir '../../java/src/main/java'
exclude '**/examples/**'
}
// Android TensorFlow wrappers, etc.
java {
srcDir '../../contrib/android/java'
}
}
// Android demo app sources.
java {
srcDir 'src'
}
manifest.srcFile 'AndroidManifest.xml'
resources.srcDirs = ['src']
aidl.srcDirs = ['src']
renderscript.srcDirs = ['src']
res.srcDirs = ['res']
assets.srcDirs = [project.ext.ASSET_DIR]
jniLibs.srcDirs = ['libs']
}
debug.setRoot('build-types/debug')
release.setRoot('build-types/release')
}
}
task buildNativeBazel(type: Exec) {
workingDir '../../..'
commandLine bazelLocation, 'build', '-c', 'opt', \
'tensorflow/examples/android:tensorflow_native_libs', \
'--crosstool_top=//external:android/crosstool', \
'--cpu=' + cpuType, \
'--host_crosstool_top=@bazel_tools//tools/cpp:toolchain'
}
task buildNativeMake(type: Exec) {
environment "NDK_ROOT", android.ndkDirectory
// Tip: install ccache and uncomment the following to speed up
// builds significantly.
// environment "CC_PREFIX", 'ccache'
workingDir '../../..'
commandLine 'tensorflow/contrib/makefile/build_all_android.sh', \
'-s', \
'tensorflow/contrib/makefile/sub_makefiles/android/Makefile.in', \
'-t', \
'libtensorflow_inference.so libtensorflow_demo.so' \
//, '-T' // Uncomment to skip protobuf and speed up subsequent builds.
}
task copyNativeLibs(type: Copy) {
from demoLibPath
from inferenceLibPath
into nativeOutDir
duplicatesStrategy = 'include'
dependsOn nativeBuildRule
fileMode 0644
}
tasks.whenTaskAdded { task ->
if (nativeBuildSystem == 'bazel' || nativeBuildSystem == 'makefile') {
if (task.name == 'assembleDebug') {
task.dependsOn 'copyNativeLibs'
}
if (task.name == 'assembleRelease') {
task.dependsOn 'copyNativeLibs'
}
}
}
// Download default models; if you wish to use your own models then
// place them in the "assets" directory and comment out this line.
apply from: "download-models.gradle"
dependencies {
if (nativeBuildSystem == 'cmake' || nativeBuildSystem == 'none') {
compile 'org.tensorflow:tensorflow-android:+'
}
}
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