programming

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How to Draw Rectangle on Imageview ?

If you already have a bitmap image in your code, just use this code snippet. bmp = bmp.copy(Bitmap.Config.RGB_565, true); That code will recreate the bitmap image as a mutable. So you can edit that bitmap image on canvas as you like. But if you do not have a bitmap image in code, create a new one using this code snippet. Bitmap bmp=Bitmap.createBitmap(img.getHeight(),img.getWidth(),Bitmap.Config.RGB_565); where img is another bitmap image you want to make a new one with the height and width of it.

Linux Laptop Boot Battery Optimizations

Boot Optimization 🔗 use sudo systemd-analyze critical-chain to get the most time consuming services. If you don’t need those services just disable them by this command sudo systemctl disable service-name.service and replace the service-name with the name of the service you want to disable. BIOS Optimization 🔗 Just disable any feature you do not use such as fingerprint scanner. To reboot into your BIOS settings, use this command sudo systemctl reboot --firmware-setup.

How to Create Bash Function ?

First step: create a utilities.sh file to add all your bash functions in it. 2nd step: add your bash function/s like this. ## utilities.sh convertMP4toMP3(){ echo -n "Enter source mp4 file : " read sourceFile echo -n "Enter destination mp3 file : " read destFile avconv -i $sourceFile -vn -acodec libmp3lame -ac 2 -ab 160k -ar 48000 $destFile } I created a bash function to convert mp4 video file to mp3 audio file from command line .

Convert mp4 to mp3 in Linux Terminal

First things first, install the required software packages. Most Linux distros ship with FFmpeg pre-installed but to ensure the required packages are installed, run this command anyway. sudo apt install ffmpeg && sudo apt install libavcodec-extra-53 After installation, let’s use it to convert mp4 video file into mp3 audio file. For FFmpeg with Constant Bitrate Encoding (CBR), use this command. ffmpeg -i video.mp4 -vn \ -acodec libmp3lame -ac 2 -ab 160k -ar 48000 \ audio.

Adding GIF image in an ImageView in android

use android-gif-drawable library 🔗 add the following dependency to build.gradle file of your project. dependencies { implementation 'pl.droidsonroids.gif:android-gif-drawable:1.2.19' } Use the view in XML file like this. <pl.droidsonroids.gif.GifImageView android:layout_width="match_parent" android:layout_height="match_parent" android:src="@drawable/src_anim" android:background="@drawable/bg_anim" /> For more customization and code, see the docs here . use VideoView on Android 🔗 You can use VideoView to show the GIF image. But the library is more efficient and smooth. use ImageView on Android 🔗 Use ImageView and Split the GIF file into several images and then apply animation to it.

How to make imageview over another view in Android ?

There are at least 3 ways to put imageview on another imageview. Simple Order 🔗 This way is just put the imageview after the other imageview in XML file. It is simple like that. The first view will be underneath the second one. Using FrameLayout 🔗 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" > <ImageView android:id="@+id/imageView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/t" /> <ImageView android:id="@+id/imageView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_launcher" /> </FrameLayout> The second image will be on top.

Comparing Two Integers in C Programming Language

Here is the code snippet in C programming language. #include <stdio.h> int main() { int a, b; a = 11; b = 99; // to take values from user input uncomment the below lines − // printf("Enter value for A :"); // scanf("%d", &a); // printf("Enter value for B :"); // scanf("%d", &b); if(a > b) printf("a is greater than b"); else printf("a is not greater than b"); return 0; }

Elixir Cheatsheet - Elixir in Brief

Elixir is a dynamic functional compiled language that runs over an Erlang Virtual Machine called BEAM. Erlang and its BEAM is well known for running low-lattency, distributed and fault-tolerant applications. Elixir was designed to take all that advantages in a modern coding language. Elixir data types are immutable. In Elixir a function is usually described with its arity (number of arguments), such as: is_boolean/1. File Types 🔗 .exs => Elixir script file .

Python Cheatsheet

Python sys Variables 🔗 variable meaning argv Command line args builti­n_m­odu­le_­names Linked C modules byteorder Native byte order check_­int­erval Signal check frequency exec_p­refix Root directory executable Name of executable exitfunc Exit function name modules Loaded modules path Search path platform Current platform stdin, stdout, stderr File objects for I/O versio­n_info Python version info winver Version number Python sys.argv 🔗 sys.argv for the command: python foo.py bar -c qux --h sys.

PHP cheatsheet

PHP Array Functions 🔗 array_diff (arr1, arr2 …) array_filter (arr, function) array_flip (arr) array_intersect (arr1, arr2 …) array_merge (arr1, arr2 …) array_pop (arr) array_push (arr, var1, var2 …) array_reverse (arr) array_search (needle, arr) array_walk (arr, function) count (count) in_array (needle, haystack) PHP String Functions 🔗 crypt (str, salt) explode (sep, str) implode (glue, arr) nl2br (str) sprintf (frmt, args) strip_tags (str, allowed_tags) str_replace (search, replace, str) strpos (str, needle) strrev (str) strstr (str, needle) strtolower (str) strtoupper (str) substr (string, start, len) PHP Filesystem Functions 🔗 clearstatcache () copy (source, dest) fclose (handle) fgets (handle, len) file (file) filemtime (file) filesize (file) file_exists (file) fopen (file, mode) fread (handle, len) fwrite (handle, str) readfile (file) PHP Date and Time Functions 🔗 checkdate (month, day, year) date (format, timestamp) getdate (timestamp) mktime (hr, min, sec, month, day, yr) strftime (formatstring, timestamp) strtotime (str) time () PHP Regular Expres­sions Functions 🔗 ereg (pattern, str) split (pattern, str) ereg_replace (pattern, replace, str) preg_grep (pattern, arr) preg_match (pattern, str) preg_match_all (pattern, str, arr) preg_replace (pattern, replace, str) preg_split (pattern, str) Regular Expres­sions Syntax 🔗 regex meaning ^ Start of string $ End of string .