Tech Talk With Debabrata

  To insert multiple rows into a Room database in Android, you can follow these steps: 1. Set up Room Database: First, make sure you have set up your Room database correctly in your Android project. Define your Entity class, create a Database class that extends RoomDatabase, and set up your DAO (Data Access Object) interface. 2. Create Entity Class: Define an Entity class that represents the data you want to insert into the database. For example: 1 2 3 4 5 6 7 8 9 @Entity (tableName = "my_table" ) public class MyEntity { @PrimaryKey (autoGenerate = true ) public int id; public String name; public int age; // Add other fields and getters/setters as needed } Create DAO: Create a DAO interface with a method to insert multiple rows. For example: 1 2 3 4 5 @Dao public interface MyEntityDao { @Insert void insertAll (List<MyEntity> entities); } Initialise Database and DAO: In your application code, create an insta...

When we learning any programming languages like C, C++, Python, PHP etc, then the " Number Swap Programming " comes first for learning.  In this article I write the number swapping between two numbers in JAVA with 3 different algorithms .  1. Creating an auxiliary memory cell in the memory ; i.e use a temporary or 3rd variable. 2. Without creating any auxiliary(additional) memory cell ; i.e without use of any 3rd variable. 3. Using exclusive OR (Bit-wise XOR) operator. Problem Statement: Write a program in java to swap two numbers. Approach- 1 :  Creating an auxiliary memory cell in the memory ; i.e use a temporary or 3rd variable. In this approach we take a extra variable that temporarily holds the value of one variable. public class Test { public static void main (String[] args) { swapUsingTempVar( 5 , 6 ); } static void swapUsingTempVar ( int a, int b) { int temp; System. out . p...

 In this article, We try to understand the concept of Java Classes and Objects with an example. The key content of this article are- (i) What is class and Object (ii) Example of class and object (iii) Difference between Class and Object (i.a) Class In Java: A class is an entity that determines how an object will behave and what the object will contain. In other words, it is a blueprint or a set of instruction to build a specific type of object. It provides initial values for member variables and member functions or methods. (i.b) Object In Java: An object is nothing but a self-contained component that consists of methods and properties to make a data useful. It helps you to determines the behaviour of the class. i.e we say that " A class is a template for an object, and an object is an instance of a class ". That's why class is called as logical entity , where object is physical entity .  So simply, a class does not allocate memory space when it is created, on other han...

 In every single android application, we need to make many number of recycler-view adapter. So every time you create a blank adapter and modify it as per your requirements. But it is very boring and as well as time taking. So here I give you a solution that you can create any recyclerview adapter within 5 seconds using file template in Android Studio. So, Lets read this full article- First we open android studio and create a project. After project creation  Open File->new->Edit File Template... Follow this below screenshot Okay, After click on "Edit File Template" a popup is open "File and Code Template", Now click on the  " + " icon and set set your template name. Now set your template name, template extension and template body. after doing everything click on "Apply" and then click on "OK" The template body I after after the screenshot Template Body Copy this code and paste it on the template body section, which I marked in scre...