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Editorial Team
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Asked: 2026-05-28T03:50:19+00:00

I am trying to write a program to display a set of values from

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I am trying to write a program to display a set of values from a database on my android. Using php connection.

My question is

ListAdapter la = new ListAdapter(this, R.id.Menu);

or

listView.setAdapter(new ListAdapter(this, R.id.Menu, menuitems));

both codes give me the same error. Cannot instantiate the type ListAdapter.

My relevant imports are :

  • android.widget.AdapterView
  • android.widget.ListAdapter
  • android.widget.ListView import
  • android.widget.AdapterView.OnItemClickListener import
  • android.widget.ArrayAdapter

why is this happening ? Why I can’t instantiate the required object ? What am I doing wrong ?
please help

Thank you in advance!

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1 Answer

  1. Editorial Team

    ListAdapter is an interface. In Java, you need to instantiate a concrete class. A concrete class serves as a bridge between the ListView and the data to be displayed; it is responsible (among other things) for packaging up the data as a row View for the ListView to use. Pick the concrete class that corresponds to how your data is organized. (It might be an ArrayAdapter<YourDataType>, a CursorAdapter, another of the classes listed in the docs, or even something of your own design.)

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