A Programmer's Scratch Pad

Restart adb server with sudo. Use: 

sudo adb kill-server

sudo adb start-server

This guideline should work for distributions like Ubuntu, Linux Mint, elementary OS, etc.

Use this command to fetch all the installed kernel images:

dpkg --list | grep linux-image

Check your current kernel image by using: 

uname -r

Remove images those are not necessary by using: 

sudo apt-get purge linux-image-x.x.x.x-generic

If you have versions 20,21,22... you can use brace expansion:

sudo apt-get purge linux-image-4.4.0-2{0..5}-generic

Create a symbolic link of “adb” in “/bin/” by using:

You can use “\usepackage[draft]{todonotes}” to write styled to-do notes in your document.

Use the following line to add a to-do text on the right margin of the page:

\todo{text}

If you want an inline to-do text, use this:

You can use % to comment out individual lines. But, it is tedious to comment/uncomment large number of comments in a document.

You can use “comment” package which gives you the option to include/exclude a particular type of comment in the pdf.

How to use: 

\usepackage{comment}

To create a comment type named “clarification”, define:

\specialcomment{clarification}

{\begingroup \bfseries \color{blue}}{\endgroup}

Now, all the comments block inside “\begin{clarification}” and “\end{clarification}” will be shown in bold face and blue color.

A sample comment block:

\begin{clarification}

This section still lacks pseudo-code of the described method

\end{clarification}

Now, the actual magic of the comment package is this:

You can use TimingLogger :

    TimingLogger timings = new TimingLogger(YourTAG, "methodA");     // ... do some work A ...     timings.addSplit("work A");     // ... do some work B ...     timings.addSplit("work B");     // ... do some work C ...     timings.addSplit("work C");     timings.dumpToLog();

It generates output like:

    D/YourTAG     ( 3459): methodA: begin     D/YourTAG     ( 3459): methodA:      9 ms, work A     D/YourTAG     ( 3459): methodA:      1 ms, work B     D/YourTAG     ( 3459): methodA:      6 ms, work C     D/YourTAG     ( 3459): methodA: end, 16 ms

To see a list of VMs

virsh list --all

To start a vm named “TestAndroid”

virsh start TestAndroid

To view the VM

virt-viewer TestAndroid

To shutdown or reboot (gracefully) 

virsh shutdown TestAndroid

virsh reboot TestAndroid

To force-off the VM

ssh connect to the host

if you need to use elevated privilege (sudo) for running the app, switch to su

Install Artifactory

In the top level build.gradle of your library project, add: 

buildscript {          dependencies {

          classpath "org.jfrog.buildinfo:build-info-extractor-gradle:3.1.1"    

    } 

}

In your library module’s build.gradle, add: 

apply plugin: 'com.jfrog.artifactory' apply plugin: 'maven-publish'

Define these two:

def packageName = 'edu.njit.avatar.sharedlib' def libraryVersion = '1.0.0'

Rename your library module’s name to match the output filename of the assembleRelease task.

Add this

publishing {    publications {        aar(MavenPublication) {            groupId packageName            version = libraryVersion            artifactId project.getName()

           // Tell maven to prepare the generated "*.aar" file for publishing            artifact("$buildDir/outputs/aar/${project.getName()}-release.aar")      }    } }

Finally, add this:

artifactory {   contextUrl = 'http://your.repo.site:8081/artifactory'   publish {       repository {           repoKey = 'libs-release-local'

          username = "admin"           password = "password"       }       defaults {           publications('aar')           publishArtifacts = true

          properties = ['qa.level': 'basic', 'dev.team': 'core']           publishPom = true       }   } }

Now, run “assembleRelease” and “artifactoryPublish” gradle tasks.

To use this library:

In the top level build.gradle file of your application project, add this:

allprojects {    repositories {        maven { url "http://your.repo.site:8081/artifactory/libs-release-local" }    } }

In the module’s build.gradle file, add this:

Install maven

In the library project’s top build.gradle file, add this: apply plugin: 'maven'

Add this: 

uploadArchives {    repositories {        mavenDeployer {            repository(url: "file:////home/hillol/.m2/repository")             pom.groupId = 'edu.njit.avatar.sharedlib'            pom.artifactId = 'shared-lib'            pom.version = '1.0.0'        }    } }

Now, after building the project, execute gradle task “uploadArchives”

To use this library:

In the build.gradle file of the app’s module (not the top one), add this inside the android{} block, add:

repositories {       mavenLocal() }

Inside the dependencies block, add:

mkdir test

cd test

git init

touch README

git add README

git commit -m 'first commit'

git remote add origin https://git.njit.edu/hd43/test.git

cd existing_git_repo

git remote add origin https://git.njit.edu/hd43/test.git

Use this:

echo -n | openssl s_client -connect YOUR_SERVER_ADDRESS:443 | \  sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | \  sudo tee '/usr/local/share/ca-certificates/SERVER_ADDRESS_CA.crt'

and then use: sudo update-ca-certificates