Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles on Trending Technologies
Technical articles with clear explanations and examples
How to play ringtone/alarm/notification sound in Android?
This example demonstrate about How to play ringtone/alarm/notification sound in Android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javapackage app.tutorialspoint.com.notifyme; import android.app.NotificationManager; import android.content.Context; import android.media.MediaPlayer; import android.media.RingtoneManager; import android.net.Uri; import android.support.v4.app.NotificationCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import java.util.Objects; public class MainActivity extends AppCompatActivity { private final static String default_notification_channel_id = "default"; @Override protected void onCreate (Bundle ...
Read MoreHow do I add Vibrate and sound for Notification in Android?
This example demonstrate about How do I add Vibrate and sound for Notification in AndroidStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javapackage app.tutorialspoint.com.notifyme; import android.app.NotificationManager; import android.content.Context; import android.media.RingtoneManager; import android.net.Uri; import android.support.v4.app.NotificationCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import java.util.Objects; public class MainActivity extends AppCompatActivity { private final static String default_notification_channel_id = "default" ; @Override protected ...
Read MoreHow to set android notification icon?
This example demonstrate about How to set android notification iconStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javapackage app.tutorialspoint.com.notifyme; import android.app.NotificationManager; import android.content.Context; import android.support.v4.app.NotificationCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import java.util.Objects; public class MainActivity extends AppCompatActivity { private final static String default_notification_channel_id = "default"; @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState); ...
Read MoreMathematical Functions in Python - Special Functions and Constants
In this article, we will learn about special functions and constants available in the math module in the Python Standard Library.Here we will discuss some constants like −pieinfNantauAnd some functions likeGammaIsinfIsnanisfinite()erf()Let's discuss constants and their respective values −pi3.141592…..e2.718281…...inf6.283185…...nantauNow let’s discuss some special functions and their implementation −Gamma − return the value of gamma(n)Isinf − checks whether the value of the function is infinity or not.Isnan − check whether the return value is a number or not.Isfinite − return True if the value is neither an infinity or a nan false otherwiseErf − returns the error function of x.Now let;’s take ...
Read MoreHow does a ClassLoader work in Java?
A Java Class is stored in the form of byte code in a .class file after it is compiled. The ClassLoader loads the class of the Java program into memory when it is required. The ClassLoader is hierarchical and so if there is a request to load a class, it is delegated to the parent class loader.The types of ClassLoader in Java are given as followsBootstrap ClassLoaderExtensions ClassLoaderSystem ClassLoaderExamplepublic class ClassLoaderTest { public static void main(String[] args) { System.out.println("class loader for this class: " + ClassLoaderTest.class.getClassLoader()); System.out.println("class loader for DNSNameService: " + sun.net.spi.nameservice.dns.DNSNameService.class.getClassLoader()); ...
Read MoreHow to convert an image to Base 64 string on Android?
This example demonstrates how do I convert an image to Base 64 string on android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 – Copy paste an image in the res/drawable. Example: res/drawable/logo.pngStep 4 − Add the following code to src/MainActivity.javaimport android.annotation.SuppressLint; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Base64; import android.widget.TextView; import java.io.ByteArrayOutputStream; public class MainActivity extends AppCompatActivity { TextView textView; String string; Bitmap ...
Read MoreCan we have an empty catch block in Java?
Yes, we can have an empty catch block. But this is a bad practice to implement in Java.Generally, the try block has the code which is capable of producing exceptions, if anything wrong in the try block, for instance, divide by zero, file not found, etc. It will generate an exception that is caught by the catch block. The catch block catches and handles the exception. If the catch block is empty then we will have no idea what went wrong within our code.Examplepublic class EmptyCatchBlockTest { public static void main(String[] args) { try { int a ...
Read MoreHow to set the color of a textView span in android?
This example demonstrates how do I set the color of a textView span in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.graphics.Color; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.SpannableString; import android.text.Spanned; import android.text.style.ForegroundColorSpan; import android.widget.TextView; public class MainActivity extends AppCompatActivity { TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ...
Read MoreHow to create CollectionView Layout in an iOS App?
CollectionView with TableView are two of many fundamental concept of iOS development, every developer should master both to be a good developer.In this post we will be focussing mainly on CollectionView, CollectionView is same as table view with some difference, Collection View supports both horizontal and vertical scrolling which looks like a grid. CollectionView in iOS is also referred to grid view in Android.To read more about it you can refer https://developer.apple.com/documentation/uikit/uicollectionviewAs you can see Collection View consists of Supplementary View and Cell, The collection view presents items onscreen using a cell, which is an instance of the UICollectionViewCell class ...
Read MoreHow to parse HTML in android?
This example demonstrates how do I parse HTML in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 – Add the given dependency in the build.gradle (Module: app)implementation 'org.jsoup:jsoup:1.11.2'Step 4 − Add the following code to src/MainActivity.javaimport android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.TextView; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import java.io.IOException; public class MainActivity extends AppCompatActivity { Button button; TextView textView; ...
Read More