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notifyDataSetChanged example

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再見小時候
再見小時候 2020-11-21 07:28

I\'m trying to use in my Android Application the notifyDataSetChanged() method for an ArrayAdapter but it doesn\'t work for me.

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  • [愿得一人]
    [愿得一人] (楼主)
    2020-11-21 08:17

    I had the same problem and I prefer not to replace the entire ArrayAdapter with a new instance continuously. Thus I have the AdapterHelper do the heavy lifting somewhere else.

    Add this where you would normally (try to) call notify

    new AdapterHelper().update((ArrayAdapter)adapter, new ArrayList(yourArrayList));
adapter.notifyDataSetChanged();



    AdapterHelper class 
    


    public class AdapterHelper {
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public void update(ArrayAdapter arrayAdapter, ArrayList listOfObject){
        arrayAdapter.clear();
        for (Object object : listOfObject){
            arrayAdapter.add(object);
        }
    }
}

    
    
             
    
                                                        
    
            
            
    
              
                
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