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ashishjohn1908 / Kotlin Interview Questions.md
Created May 1, 2021 01:06 — forked from paulfranco/Kotlin Interview Questions.md

Interview Questions

Kotlin

Q1: What is a primary constructor in Kotlin? ☆☆

Answer: The primary constructor is part of the class header. Unlike Java, you don't need to declare a constructor in the body of the class. Here's an example:




  


  




    


          
    

      

        
        

          

              @ashishjohn1908
          

          

            
                ashishjohn1908
                / README.md
            
            

              Created
              July 11, 2019 10:50
                — forked from lopspower/README.md
            

              
                Hexadecimal color code for transparency
              
          

        

      

        

  

      

    
Hexadecimal color code for transparency


Twitter


How to set transparency with hex value ?


For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.


All hex value from 100% to 0% alpha:



  


  




    


          
    

      

        
        

          

              @ashishjohn1908
          

          

            
                ashishjohn1908
                / expand-collapse.java
            
            

              Created
              June 27, 2017 06:17
                — forked from ZkHaider/expand-collapse.java
            

              
                Simple Expand / Collapse RecyclerView Item
              
          

        

      

        

  

    
    


        



  


  

        

          
          public static class ExampleViewHolder extends RecyclerView.ViewHolder 
        

        

          
              implements View.OnClickListener {
        

        

          
          

        

        

          
              private int originalHeight = 0;
        

        

          
              private boolean isViewExpanded = false;
        

        

          
              private YourCustomView yourCustomView
        

        

          
              
        

        

          
              public ExampleViewHolder(View v) {
        

        

          
               super(v);
        

        

          
               v.setOnClickListener(this);