Mariuxtheone

public Bitmap blurBitmap(Bitmap bitmap){
		
		//Let's create an empty bitmap with the same size of the bitmap we want to blur
		Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
		
		//Instantiate a new Renderscript
		RenderScript rs = RenderScript.create(getApplicationContext());
		
		//Create an Intrinsic Blur Script using the Renderscript
		ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));

alexfu

public class ColorUtils {
  private static final double LM_RED_COEFFICIENT = 0.2126;
  private static final double LM_GREEN_COEFFICIENT = 0.7152;
  private static final double LM_BLUE_COEFFICIENT = 0.0722;

  public static int calculateRelativeLuminance(int color) {
    int red = (int) (Color.red(color) * LM_RED_COEFFICIENT);
    int green = (int) (Color.green(color) * LM_GREEN_COEFFICIENT);
    int blue = (int) (Color.blue(color) * LM_BLUE_COEFFICIENT);
    return red + green + blue;

castorflex

public class CircularProgressDrawable extends Drawable
    implements Animatable {

  private static final Interpolator ANGLE_INTERPOLATOR      = new LinearInterpolator();
  private static final Interpolator SWEEP_INTERPOLATOR      = new DecelerateInterpolator();
  private static final int          ANGLE_ANIMATOR_DURATION = 2000;
  private static final int          SWEEP_ANIMATOR_DURATION = 600;
  private static final int          MIN_SWEEP_ANGLE         = 30;
  private final        RectF        fBounds                 = new RectF();

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

gabrielemariotti

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layoutfab);
        
        //Outline
        int size = getResources().getDimensionPixelSize(R.dimen.fab_size);
        Outline outline = new Outline();

dmarcato

def toCamelCase(String string) {
    String result = ""
    string.findAll("[^\\W]+") { String word ->
        result += word.capitalize()
    }
    return result
}

afterEvaluate { project ->
    Configuration runtimeConfiguration = project.configurations.getByName('compile')

JakeWharton

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

public class ForegroundImageView extends ImageView {
  private Drawable foreground;

chrisbanes

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

rharter

package com.ryanharter.android.util;

import android.content.Context;
import android.content.SharedPreferences;

/**
 * Keeps track of the number of app launches, and days since first launch, and
 * provides an easy way to determine whether you should show a rating prompt
 * or not.
 */

donnfelker

import android.graphics.*;
import com.squareup.picasso.Transformation;

/**
 * Transforms an image into a circle representation. Such as a avatar.
 */
public class CircularTransformation implements Transformation
{
    int radius = 10;