Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialKyle Baker
8,211 PointsWhat's going on?
error is this
Error:(33, 24) error: ListAdapter is abstract; cannot be instantiated
and code is this
package kybacorps.com.golf;
import android.app.ListActivity; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.text.Layout; import android.view.View; import android.view.Menu; import android.view.MenuItem; import android.widget.ArrayAdapter; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.TextView;
public class MainActivity extends ListActivity { private Hole[] mHoles = new Hole[18]; private ListAdapter mListAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int strokes = 0;
for(int i=0; i<mHoles.length; i++) {
mHoles[i] = new Hole("Hole: " + (i +1), strokes);
}
mListAdapter = new ListAdapter(this, mHoles);
setListAdapter(mListAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
only thing i could think of is that he did an empty activity and i did a blank one, but i dont really know how that would mess it up. please help
1 Answer
David Remington
18,326 PointsIt looks like you accidentally imported the generic android.widget.ListAdapter (which is an interface not a class) instead of your own custom ListAdapter class implementation. If you change the import to your own ListAdapter you should be golden.
Kyle Baker
8,211 PointsKyle Baker
8,211 PointsThanks David! I was golden after two additional bugs (int in a setText and didn't set listview special id). :)