Constantine Voronin cvoronin

Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

Functional Programming is a model of programming that transform and compose stream of immutable sequences by applying map, filter and reduce. Events are immutable because you can't change history.
Reactive Programming is a model of programming focuses on data flow and change propagation.
ReactiveX is an API that focuses on asynchronous composition and manipulation of observable streams of data or events by using a combination of the Observer pattern, Iterator pattern, and features of Functional Programming.
RxJava is the open-source implementation of ReactiveX in Java.
RxJava is a Java VM implementation of ReactiveX (Reactive Extensions): a library for composing asynchronous and event-based programs by using observable sequences.
RxAndroid is a lightweight extension to RxJava that providers a Scheduler for Android’s Main Thread, as well as the ability to create a Scheduler that runs on any given Android Handler class.
The two main classes are Observable and Subscriber.
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Material text sizes XML for Android

Simple helper file for standard text sizes in material design. The sizes are provided by the material design documentation https://www.google.com/design/spec/style/typography.html#typography-roboto

Standard Styles

Too many type sizes and styles at once can wreck any layout. A typographic scale is a limited set of type sizes that work well together, along with the layout grid. The basic set of styles are based on a typographic scale of 12, 14, 16, 20, and 34.

	public static void printPermissions(Context context) {
	PackageInfo android;
	try {
	android = context.getPackageManager().getPackageInfo("android", PackageManager.GET_PERMISSIONS);
	} catch (PackageManager.NameNotFoundException e) {
	e.printStackTrace();
	return;
	}

	PermissionInfo[] permissions = android.permissions;

	// Dagger 1 example
	@Module(
	complete = false,
	library = true
	)
	public final class ApiModule {
	@Provides
	@Singleton
	Retrofit provideRetrofit(Gson gson, Application app) {
	return new Retrofit.Builder()


	import android.util.Log;

	import com.appandweb.prjtestdrivendev.BuildConfig;
	import com.squareup.okhttp.Interceptor;
	import com.squareup.okhttp.Request;
	import com.squareup.okhttp.Response;
	import com.squareup.okhttp.ResponseBody;

	import java.io.IOException;

	package com.example;

	import android.content.Intent;
	import android.widget.Button;

	import com.example.MockSupport;

	import org.junit.Before;
	import org.junit.Rule;
	import org.junit.Test;


	import com.squareup.okhttp.ResponseBody;
	import okio.BufferedSink;
	import okio.Okio;
	import retrofit.Response;
	import retrofit.http.GET;
	import retrofit.http.Query;
	import rx.Observable;

	interface ApiService {

	import com.google.gson.JsonElement;
	import com.google.gson.JsonObject;
	import com.google.gson.JsonSerializationContext;
	import com.google.gson.JsonSerializer;
	import com.squareup.javapoet.*;

	import javax.lang.model.element.Modifier;
	import java.io.File;
	import java.io.IOException;
	import java.lang.reflect.Field;