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Start your free trialMalcolm Mutambanengwe
4,205 PointssendVote
Unable to get item list position? Steve Hunter
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.view.ListView;
public class GameListActivity extends ListActivity {
public String[] mGames = {
"Age of Empires",
"Civilization",
"Minecraft",
"SimCity"
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_game_list);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mGames);
setListAdapter(adapter);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
String games = mGames[position].sendVote();
}
// This is a helper method to tally votes on a back-end system
public void sendVote(String game) {
VoteService.recordVote(game);
}
}
3 Answers
Steve Hunter
57,712 PointsHi Mal,
You want to call the method sendVote
- no need for dot notation. Just call it! It wants a String
as a parameter which is the name of a game from the mGames
array. Use square brackets to access this and pass in the position
argument that the onListItemClick()
method receives.
That all looks like:
super.onListItemClick(l, v, position, id);
sendVote(mGames[position]);
Make sense?
Steve.
Malcolm Mutambanengwe
4,205 PointsHi Steve. Your explanation opened my eyes. The value of the position determines the name of the game which will be passed as the String. To get the value from an array the integer must be in square brackets (hitting myself in the head).
Three thumbs up
The third thumb is my pet Jack Russels :)
Steve Hunter
57,712 Points
(I don't know what they've changed on the site, but I can't add comments, only answers)
Steve Hunter
57,712 PointsA refresh fixed it ...