Skip to content

Instantly share code, notes, and snippets.


Christopher Piekarski chris-piekarski

View GitHub Profile
chris-piekarski / android:layout_width
Created Oct 7, 2014
Layout Width/Height Constants
View android:layout_width
public static final int FILL_PARENT
Added in API level 1
Special value for the height or width requested by a View. FILL_PARENT means that the view wants to be as big as its parent, minus the parent's padding, if any. This value is deprecated starting in API Level 8 and replaced by MATCH_PARENT.
Constant Value: -1 (0xffffffff)
public static final int MATCH_PARENT
Added in API level 8
chris-piekarski / jce_providers
Created Sep 23, 2014
Listing all JCE providers and the algorithms they support
View jce_providers
Provider[] providers = Security.getProviders();
for (Provider p : providers) {
System.out.printf("%s/%s/%f\n", p.getName(), p.getInfo(),
Set<Service> services = p.getServices();
for (Service s : services) {
System.out.printf("\t%s/%s/%s\n", s.getType(),
s.getAlgorithm(), s.getClassName());
chris-piekarski / aosp_dimension_types
Created Sep 3, 2014
AOSP Dimension Types (dp, sp, pt, px, mm, in)
View aosp_dimension_types
A dimension value defined in XML. A dimension is specified with a number followed by a unit of measure. For example: 10px, 2in, 5sp. The following units of measure are supported by Android:
Density-independent Pixels - An abstract unit that is based on the physical density of the screen. These units are relative to a 160 dpi (dots per inch) screen, on which 1dp is roughly equal to 1px. When running on a higher density screen, the number of pixels used to draw 1dp is scaled up by a factor appropriate for the screen's dpi. Likewise, when on a lower density screen, the number of pixels used for 1dp is scaled down. The ratio of dp-to-pixel will change with the screen density, but not necessarily in direct proportion. Using dp units (instead of px units) is a simple solution to making the view dimensions in your layout resize properly for different screen densities. In other words, it provides consistency for the real-world sizes of your UI elements across different devices.
Scale-independent Pixels - This
chris-piekarski / aosp_http_headers
Created Aug 13, 2014
Dump Android HttpRequest Headers To Logcat
View aosp_http_headers
public void handle(HttpRequest request, ... ) {
Header[] hdrs = request.getAllHeaders();
for( Header h: hdrs) {
Log.w(TAG, h.getName()+":"+h.getValue());
chris-piekarski / system_aosp_libs
Created Aug 4, 2014
Adding system shared lib to AOSP
View system_aosp_libs
See device/sample/frameworks/PlatformLibrary/README.txt
Platform Library Example
This directory contains a full example of writing your own Android platform
shared library, without changing the Android framework. It also shows how to
write JNI code for incorporating native code into the library, and a client
application that uses the library.
chris-piekarski / syslog_real_time_crunch
Created Jul 22, 2014
Crunch syslog file in real-time
View syslog_real_time_crunch
tail -f /var/log/syslog | stdbuf -oL cut -d'|' -f2 | tee times.txt
chris-piekarski / ubuntu_oracle_jdk
Created Jul 4, 2014
Ubuntu Oracle JDK Install
View ubuntu_oracle_jdk
sudo apt-get install python-software-properties
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
Oracle JDK 6
sudo apt-get install oracle-java6-installer
Oracle JDK 7
sudo apt-get install oracle-java7-installer
View django_notes
#get version
python -c "import django; print(django.get_version())"
#create a project startproject mysite
#run development server
python runserver OR python runserver 8080 OR python runserver
#create databse tables from INSTALLED_APPS models
View debain_custom_service
sudo vi /etc/init.d/cjp
sudo chmod +x /etc/init.d/cjp
#if you want it to run at startup
sudo update-rc.d cjp defaults
#to remove
sudo update-rc.d -f cjp remove
#start and stop at will
chris-piekarski / python_create_cert
Created May 7, 2014
Generate Self Signed Cert w/Python
View python_create_cert
import sys, os
from OpenSSL import crypto, SSL
from socket import gethostname
from pprint import pprint
from time import gmtime, mktime
from os.path import exists, join
CERT_FILE = "apache.crt"
KEY_FILE = "apache.key"