GRALDE - add custom external *.jar to module dependencies

1. An example is map-visualiser project from github

2. Clone that project and make gradlew build for it

3. It will build its *.jar inside of /build/libs

4. Create libs dir inside your module

5. Copy/past that *.jar into your module libs dir 

6. Add these LOCs below into module's build.gradle and build the project:

repositories {
    mavenCentral()
    flatDir {
        dirs 'libs'    
    }
}

dependencies {    
    compile name: 'map-visualiser-1.0'
    testCompile group: 'junit', name: 'junit', version: '4.11'
}

GRADLE & NODE NPM - gradle task for execute npm install and bower install

https://gist.github.com/spikeheap/8558786

import org.gradle.api.tasks.Exec
	defaultTasks 'bower'
	// Get the path for the locally installed binaries
	task npmBin << {
	new ByteArrayOutputStream().withStream { os ->
	def result = exec {
	executable = 'npm'
	args = ['bin']
	standardOutput = os
	}
	ext.binPath = os.toString().trim() + "/"
	}
	}
	// Install packages from package.json
	task npm(type: Exec) {
	description = "Grab NodeJS dependencies (from package.json)"
	commandLine = ["npm", "install"]
	inputs.file "package.json"
	outputs.dir "node_modules"
	tasks.npmBin.execute()
	}
	// Install the bower components for front-end library management
	task bower(dependsOn: 'npm', type: Exec){
	commandLine "${npmBin.binPath}bower", 'install'
	}

GRADLE - delete whole directory with all subdirectories

Override clean task:

clean {
    delete += 'dist'
}

If you do like this it will remove all files but leaves empty sub-directories:(!!!!!!)
clean {

    delete += fileTree('someDir')
}

or

clean {

    delete += fileTree('someDir').include('**/*')
}

GRADLE - gradle tutorial (link)

https://docs.gradle.org/current/userguide/tutorial_using_tasks.html

Spring Boot gradle webapp with Java persistence on server side and AngularJS+Bootstrap on client (link)

http://www.rnowak.info/2014/06/spring-boot-and-angularjs-quick-start.html

LINUX UBUNTU 12.04 64-bit and Android SDK 32-bit issue - gradle: Cannot run program sdk build-tools android-4.4 aapt No such file or directory

If you got this kind of error during the building of Android app: Execution failed for task mergeDebugResources Cannot run program sdk build-tools android-4.4 aapt No such file or directory -- this happen because you run Android SDK 32-bit on Linux Ubuntu 12.04 64-bit.

You can fix it easily by installing this libraries:

sudo apt-get install lib32stdc++6
sudo apt-get install lib32z1

More about this issue here:
http://askubuntu.com/questions/147400/problems-with-eclipse-and-android-sdk
http://stackoverflow.com/questions/18928164/android-studio-cannot-find-aapt