Stefan Hoth stefanhoth

#GDG Android in Berlin brainstorming session

On November 27, 2013 I was asking the brilliant Android developers at GDG Android in Berlin for their favorite libraries that make their lives easier and should be included in every newly developed app.

This is the list of libraries we collected during this 10 minute session.

Architecture

The new Secure Password Hashing API in PHP 5.5

The [RFC for a new simple to use password hashing API][rfc] has just been accepted for PHP 5.5. As the RFC itself is rather technical and most of the sample codes are something you should not use, I want to give a very quick overview of the new API:

Why do we need a new API?

Everybody knows that you should be hashing their passwords using bcrypt, but still a surprising number of developers uses insecure md5 or sha1 hashes (just look at the recent password leaks). One of the reasons for this is that the crypt() API is ridiculously hard to use and very prone to programming mistakes.

	# Stream a video
	ffmpeg -re -i video.avi -vf "scale=40:ih*40/iw, crop=40:16" -f rawvideo -vcodec rawvideo -sws_flags bilinear -pix_fmt rgb24 - > /dev/udp/matelight.cbrp3.c-base.org/1337

	# Loop a gif
	ffmpeg -re -ignore_loop 0 -i image.gif -vf "scale=40:ih*40/iw, crop=40:16" -f rawvideo -vcodec rawvideo -sws_flags bilinear -pix_fmt rgb24 - > /dev/udp/matelight.cbrp3.c-base.org/1337

	# Stream webcam
	# Mac
	ffmpeg -re -f avfoundation -r 30 -s 1280x720 -i "0" -vf "scale=40:ih*40/iw, crop=40:16, pp=autolevels:f, eq=1.5" -f rawvideo -vcodec rawvideo -sws_flags bilinear -pix_fmt rgb24 - > /dev/udp/matelight.cbrp3.c-base.org/1337

	#!/usr/bin/python

	# License for any modification to the original (linked below):
	# ----------------------------------------------------------------------------
	# "THE BEER-WARE LICENSE" (Revision 42):
	# Sebastiano Poggi and Daniele Conti wrote this file. As long as you retain
	# this notice you can do whatever you want with this stuff. If we meet some day,
	# and you think this stuff is worth it, you can buy us a beer in return.

	import argparse, sys, subprocess, tempfile

	#!/bin/bash
	# License for any modification to the original (linked below):
	# ----------------------------------------------------------------------------
	# "THE BEER-WARE LICENSE" (Revision 42):
	# Sebastiano Poggi wrote this file. As long as you retain this notice you
	# can do whatever you want with this stuff. If we meet some day, and you think
	# this stuff is worth it, you can buy me a beer in return.
	# ----------------------------------------------------------------------------
	prefix=${1-"drawable"}
	buckets=( mdpi hdpi xhdpi xxhdpi xxxhdpi )

	SDK_HOME_PATH="$HOME"
	SDK_PATH="$SDK_HOME_PATH/android-sdk-linux"

	# Needs to be updated when new releases are made
	SDK_DOWNLOAD_URL="http://dl.google.com/android/android-sdk_r22.6.2-linux.tgz"

	curl --location $SDK_DOWNLOAD_URL \| tar -xz -C $SDK_HOME_PATH

	# Just install platform-tools, build-tools & Android-19
	# Filter names are from `android list sdk -e -a`

	import android.graphics.Bitmap;
	import android.graphics.Bitmap.Config;
	import android.graphics.BitmapShader;
	import android.graphics.Canvas;
	import android.graphics.Paint;
	import android.graphics.RectF;
	import android.graphics.Shader;

	// enables hardware accelerated rounded corners
	// original idea here : http://www.curious-creature.org/2012/12/11/android-recipe-1-image-with-rounded-corners/

	@echo off
	FOR /f "tokens=*" %%i IN ('docker ps -aq') DO docker rm %%i
	FOR /f "tokens=*" %%i IN ('docker images --format "{{.ID}}"') DO docker rmi %%i

	/*
	* Mass Emailer Google Spreadsheet and Forms Script.
	*
	* Changelog:
	* 19. June 2013
	* - also copy CC and BCC from draft email
	* 27. May 2013
	* - bugfix, kudos to @stefanhoth: the col is called "Email"
	* - show the quota left for the day (thanks to @stefanhoth)
	* 30. Apr. 2013