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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to create animation using XML file in an Android App using Kotlin?
This example demonstrates how to create animation using XML files in an Android App using Kotlin.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.Example Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.view.View import android.view.animation.Animation import android.view.animation.AnimationUtils import android.widget.Button import android.widget.TextView import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity(), Animation.AnimationListener { private lateinit var textView: TextView private lateinit var buttonZoom: Button private lateinit var buttonBlink: Button ...
Read MoreHow to create GridView Layout in an Android App using Kotlin?
This example demonstrates how to create GridView Layout in an Android App using Kotlin.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.Example Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.widget.AdapterView.OnItemClickListener import android.widget.GridView import android.widget.Toast import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { lateinit var gridView: GridView private var playerNames = arrayOf("Cristiano Ronaldo", "Joao Felix", "Bernado Silva", "Andre Silve", "Bruno Fernandez", "William Carvalho", "Nelson Semedo", "Pepe", "Rui Patricio") ...
Read MoreHow to switch between different Activities in Android using Kotlin?
This example demonstrates how to switch between different Activities in Android using Kotlin.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.Example Step 3 − Add the following code to src/MainActivity.ktimport android.content.Intent import android.os.Bundle import android.widget.Button import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) title = "KotlinApp" val button:Button = findViewById(R.id.btnOpenAct2) button.setOnClickListener ...
Read MoreHow to create Tab Layout in an Android App using Kotlin?
This example demonstrates how to create Tab Layout in an Android App using Kotlin.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.Example Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import androidx.appcompat.app.AppCompatActivity import androidx.viewpager.widget.ViewPager import com.google.android.material.tabs.TabLayout import com.google.android.material.tabs.TabLayout.OnTabSelectedListener import com.google.android.material.tabs.TabLayout.TabLayoutOnPageChangeListener class MainActivity : AppCompatActivity() { lateinit var tabLayout: TabLayout lateinit var viewPager: ViewPager override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) ...
Read MoreHow to detect if a user is using an Android tablet or a phone using Kotlin?
This example demonstrates how to detect if a user is using an Android tablet or a phone using Kotlin.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.Example Step 3 − Add the following code to src/MainActivity.ktimport android.content.Context import android.os.Bundle import android.telephony.TelephonyManager import android.widget.Toast import androidx.appcompat.app.AppCompatActivity import java.util.* class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) title = "KotlinApp" ...
Read MoreReordered Power of 2 in C++
Suppose we have a positive integer N, we reorder the digits in any order (including the original order) such that the leading digit is non-zero. We have to check whether we can do this in a way such that the resulting number is a power of 2. So if the number is like 46, then the answer will be true.To solve this, we will follow these steps −Define a method called count, this will take x as inputret := 0while x is not 0ret := ret + 10 ^ last digit of xx := x / 10return retFrom the main ...
Read Morebeta(), betaf() and betal() functions in C++ STL
The functions beta(), betaf() and betal() are built-in functions in the standard template library of C++. These functions are used to calculate the beta function of two positive real numbers.The functions beta(), betaf() and betal() are built-in functions in the standard template library of C++. These functions are used to calculate the beta function of two positive real numbers.$B(x, y)=\int_{0}^{1}t^{(x-1)}(1-t)^{(y-1)}dt$beta()The beta() function is used to deal with values of data type double i.e. it accepts the parameter of double type and returns are double value.Syntaxdouble beta(double x, double y)Parametersx is a double value that gives the value of x in ...
Read MoreBayes Theorem for Conditional Probability in C/C++
Conditional probability denoted by P(A|B) is the probability of occurrence of an event ‘A’ given that event ‘B’ has already occurred.Formula for conditional probability −P(A|B) = P( A⋂B ) / P(B)Bayes’s TheoremIt is the formula that shows the relation between probabilities of occurrences of mutually dependent events i.e. it given the relation between their conditional probabilities.Given an event A and another event B, according to bayes’ theorem, P(A/B) = {P(B/A) * P(A)} / P(B)Lets derive the formula for Bayes’ theorem, For this we will use the formula for conditional probability, P(A|B) = P( A?B ) / P(B) —— 1 P(B|A) ...
Read Moreattributes in C++
Attributes are modern ways in C++ to standardize things if their code runs on different compilers. Attributes are used to provide some extra information that is used to enforce conditions (constraints), optimization and do specific code generation if required.These are like an information manual for the compilers to do some enforcing which will improve performance of the code. Attributes were first seen in C++ 11 and are important parts of the programming language since then, Also with every version some revisions are continuously made to make them more powerful and better.Let’s see how we can define attributes in C++For different ...
Read MoreHow to implement LongToIntFunction using lambda and method reference in Java?
LongToIntFunction is a functional interface from java.util.function package introduced in Java 8. This functional interface accepts a long-valued parameter as input and produces an int-valued result. LongToIntFunction interface can be used as an assignment target for a lambda expression or method reference. This interface contains only one abstract method: applyAsInt() and doesn't contain any default and abstract methods.Syntax@FunctionalInterface interface LongToIntFunction { int applyAsInt(long value); }Example of Lambda Expressionimport java.util.function.LongToIntFunction; public class LongToIntLambdaTest { public static void main(String args[]) { LongToIntFunction getInt = longVal -> { ...
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