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Add example for LASlib using Gradle JavaCPP with Android Studio (pull #…
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lancewoo authored Sep 6, 2021
1 parent 4f96235 commit 6ede039
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98 changes: 98 additions & 0 deletions laslib-android/LAStools/build.gradle
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plugins {
id 'com.android.library'
id 'org.bytedeco.gradle-javacpp-build' version '1.5.6'
}

android {
compileSdkVersion 30
buildToolsVersion "30.0.3"
ndkVersion "21.4.7075529"

defaultConfig {
minSdkVersion 19
targetSdkVersion 30
versionCode 1
versionName "1.0"

testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
consumerProguardFiles 'consumer-rules.pro'

externalNativeBuild {
cmake {
arguments '-DANDROID_STL=c++_static'
}
ndkBuild {
// multicore build
arguments "-j" + Runtime.runtime.availableProcessors()
}
}
ndk {
abiFilters "armeabi-v7a", "arm64-v8a", "x86", "x86_64"
}
}

externalNativeBuild {
cmake {
path file('src/main/cpp/CMakeLists.txt')
}
}

buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}

compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}

libraryVariants.all { variant ->
def variantName = variant.name.capitalize() // either "Debug" or "Release"
def javaCompile = project.tasks.getByName("compile${variantName}JavaWithJavac")
def generateJson = project.tasks.getByName("generateJsonModel$variantName")

// Compiles NativeLibraryConfig.java
task "javacppCompileJava$variantName"(type: JavaCompile) {
include 'com/senter/lastools/NativeLibraryConfig.java'
source = javaCompile.source
classpath = javaCompile.classpath
destinationDir = javaCompile.destinationDir
}

// Parses included .h header files and outputs <TargetClassName>.java configured in NativeLibraryConfig.java
task "javacppBuildParser$variantName"(type: org.bytedeco.gradle.javacpp.BuildTask) {
dependsOn "javacppCompileJava$variantName"
classPath = [javaCompile.destinationDir]
// includePath contains places to search for header files configured in NativeLibraryConfig.java
includePath = ["$projectDir/src/main/cpp/LASzip/src", "$projectDir/src/main/cpp/LASlib/inc"]
classOrPackageNames = ['com.senter.lastools.NativeLibraryConfig']
outputDirectory = file("$projectDir/src/main/java/")
}

// Compiles <TargetClassName>.java and everything else
javaCompile.dependsOn "javacppBuildParser$variantName"

// Generates jnijavacpp.cpp and <Library Name>.cpp
task "javacppBuildCompiler$variantName"(type: org.bytedeco.gradle.javacpp.BuildTask) {
dependsOn javaCompile
classPath = [javaCompile.destinationDir]
classOrPackageNames = ['com.senter.lastools.LasLib']
compile = false
deleteJniFiles = false
outputDirectory = file("$projectDir/src/main/cpp/LASlib/")
}

// Picks up the C++ files listed in CMakeLists.txt
generateJson.dependsOn "javacppBuildCompiler$variantName"
}
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])

implementation 'org.bytedeco:javacpp:1.5.6'

}
2 changes: 2 additions & 0 deletions laslib-android/LAStools/src/main/AndroidManifest.xml
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.senter.lastools" />
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package com.senter.lastools;

import org.bytedeco.javacpp.annotation.Platform;
import org.bytedeco.javacpp.annotation.Properties;
import org.bytedeco.javacpp.tools.Info;
import org.bytedeco.javacpp.tools.InfoMap;
import org.bytedeco.javacpp.tools.InfoMapper;

@Properties(
// It's important that dependency headers go first, check https://github.com/bytedeco/javacpp/wiki/Mapping-Recipes#including-multiple-header-files
value = @Platform(
include = {
// LASzip/src folder
"mydefs.hpp", "lasquantizer.hpp", "lasattributer.hpp", "laszip.hpp", "laspoint.hpp"
// LASlib
, "lasvlr.hpp"
, "lasdefinitions.hpp", "lasutility.hpp", "lasignore.hpp", "laswaveform13writer.hpp", "laswaveform13reader.hpp"
, "laswriter.hpp", "lasreader.hpp"
},
// A <Library Name>.cpp will be generated
library = "jniLASlib"),
// A <Target Class Name>.java will be generated
target = "com.senter.lastools.LasLib"
)
public class NativeLibraryConfig implements InfoMapper {
static {
// Let Android take care of loading JNI libraries for us
// System.setProperty("org.bytedeco.javacpp.loadLibraries", "false");
}

public void map(InfoMap infoMap) {
infoMap
// skip the macro definition LASCopyString translation
.put(new Info("LASCopyString").cppTypes("char *", "const char *").skip())
// macro _MSC_VER should not be valid on Android
.put(new Info("defined(_MSC_VER)").define(false))
.put(new Info("_MSC_VER").define(false));
}
}
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26 changes: 26 additions & 0 deletions laslib-android/build.gradle
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// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
google()
mavenCentral()
jcenter()
}
dependencies {
classpath "com.android.tools.build:gradle:3.6.3"

// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}

allprojects {
repositories {
google()
mavenCentral()
jcenter()
}
}

task clean(type: Delete) {
delete rootProject.buildDir
}
25 changes: 25 additions & 0 deletions laslib-android/build.sh
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#!/bin/bash
set -e
set +x


if [[ ! -d "$ANDROID_HOME/build-tools" ]]; then
echo "Please download Android SDK first and set the SDK path to $ANDROID_HOME."
exit
fi

cd LAStools/src/main
if [[ ! -d "cpp" ]]; then
git clone https://github.com/LAStools/LAStools.git cpp
fi
cd cpp
git checkout 9ecb4e682153436b044adaeb3b4bfdf556109a0f

echo "Decompressing modification archives..."
tar -xzvf "../ndk_modifications.tgz"


cd ../../../../

./gradlew assemble

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6 changes: 6 additions & 0 deletions laslib-android/gradle/wrapper/gradle-wrapper.properties
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#Mon Nov 23 18:32:09 JST 2020
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
172 changes: 172 additions & 0 deletions laslib-android/gradlew
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#!/usr/bin/env sh

##############################################################################
##
## Gradle start up script for UN*X
##
##############################################################################

# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null

APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`

# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS=""

# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"

warn () {
echo "$*"
}

die () {
echo
echo "$*"
echo
exit 1
}

# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "`uname`" in
CYGWIN* )
cygwin=true
;;
Darwin* )
darwin=true
;;
MINGW* )
msys=true
;;
NONSTOP* )
nonstop=true
;;
esac

CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar

# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD="java"
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi

# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Could not set maximum file descriptor limit: $MAX_FD"
fi
else
warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
fi
fi

# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi

# For Cygwin, switch paths to Windows format before running java
if $cygwin ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
JAVACMD=`cygpath --unix "$JAVACMD"`

# We build the pattern for arguments to be converted via cygpath
ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
# Add a user-defined pattern to the cygpath arguments
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
# Now convert the arguments - kludge to limit ourselves to /bin/sh
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option

if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=$((i+1))
done
case $i in
(0) set -- ;;
(1) set -- "$args0" ;;
(2) set -- "$args0" "$args1" ;;
(3) set -- "$args0" "$args1" "$args2" ;;
(4) set -- "$args0" "$args1" "$args2" "$args3" ;;
(5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
(6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
(7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
(8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
(9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
esac
fi

# Escape application args
save () {
for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
echo " "
}
APP_ARGS=$(save "$@")

# Collect all arguments for the java command, following the shell quoting and substitution rules
eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"

# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
cd "$(dirname "$0")"
fi

exec "$JAVACMD" "$@"
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