build.gradle

import org.apache.tools.ant.taskdefs.condition.Os

buildscript {
	repositories {
		jcenter()
	}
	dependencies {
		classpath 'com.android.tools.build:gradle:1.2.3'
	}
}

allprojects {
	repositories {
		jcenter()
	}
}

apply plugin: 'com.android.application'

dependencies {
	compile fileTree(dir: 'libs', include: '*.so')
}

android {
	compileSdkVersion 17
	buildToolsVersion '21.1.2'

	/* this stops gradle from making it's own Android.mk file */
	sourceSets.main.jni.srcDirs = []

	sourceSets {
		main {
			manifest {
				srcFile 'AndroidManifest.xml'
			}
			java {
				srcDir 'src'
					exclude 'com/artifex/mupdf/fitz/AndroidDrawDevice.java'
			}
			res {
				srcDir 'res'
			}
			assets {
				srcDir 'assets'
			}
			resources {
				srcDir 'src'
			}
			jniLibs {
				srcDir 'libs'
			}
		}
	}

	/* This is important, it will run lint checks but won't abort build */
	lintOptions {
		abortOnError false
	}
}

/* This defines the path to Android's ndk-build. */
def ndkBuildPath = plugins.getPlugin('com.android.application').sdkHandler.getNdkFolder().absolutePath + File.separator + 'ndk-build'
if (Os.isFamily(Os.FAMILY_WINDOWS)) {
	ndkBuildPath +='.cmd'
}

/* This task builds the native part */
task buildNative(type: Exec,description: 'Compile JNI source via NDK') {
	println('executing buildNative')
	commandLine ndkBuildPath, '-C', file('.').absolutePath, ' FZ_ENABLE_GPRF=1'
	//'NDK_PROJECT_PATH=build','APP_BUILD_SCRIPT=src/main/jni/Android.mk'//force using appropriate Makefile
}

/* This task cleans the native part */
task cleanNative(type: Exec, description: 'Clean JNI object files') {
	println('executing cleanNative')
	commandLine ndkBuildPath, '-C', file('.').absolutePath, 'clean'
}

/* cleaning should also include cleaning native */
clean.dependsOn 'cleanNative'

/* building should include native */
tasks.withType(JavaCompile){
	compileTask -> compileTask.dependsOn buildNative
}