解决Android Studio报的警告：Resource IDs will be non-final in Android Gradle Plugin version 5.0

升级Android studio4.1后用switch语句判断id直接给出了警告

Resource IDs will be non-final in Android Gradle Plugin version 5.0, avoid using them in switch case statements

  

   

    

     

    
    

     

      int id = view.getId();
     
    
   

    

     

    
    

     

      switch (id) {
     
    
   

    

     

    
    

     
    
      case R.id.
      button1:
     
    
   

    

     

    
    

     

              action1();
     
    
   

    

     

    
    

     
        
      break;
     
    
   

    

     

    
    

     
    
      case R.id.
      button2:
     
    
   

    

     

    
    

     

              action2();
     
    
   

    

     

    
    

     
        
      break;
     
    
   

    

     

    
    

     
    
      case R.id.
      button3:
     
    
   

    

     

    
    

     

              action3();
     
    
   

    

     

    
    

     
        
      break;
     
    
   

    

     

    
    

     

      }
     
    
  

谷歌官方给出的解决办法是把switch换成if else

  

   

    

     

    
    

     

      int 
      id = view.getId();
     
    
   

    

     

    
    

     

      if (
      id == R.id.button1) {
     
    
   

    

     

    
    

     

          action1();
     
    
   

    

     

    
    

     

      } 
      else 
      if (
      id == R.id.button2) {
     
    
   

    

     

    
    

     

          action2();
     
    
   

    

     

    
    

     

      } 
      else 
      if (
      id == R.id.button3) {
     
    
   

    

     

    
    

     

          action3();
     
    
   

    

     

    
    

     

      }
     
    
  

根据谷歌官方的说法，这样的写法变更在UI中几乎没有性能损失。