Non-Extended Classes in android

Question

I have a class Scores.java I need to know whats the correct way to create these. I get "The constructor Scores is not defined. Do I have to extend off everything in Android??

package com.threeuglymen.android.stuff;

import android.app.Application;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.preference.PreferenceManager;
import android.util.Log;


public class Scores {

    private Context mycontext;

    public Scores (Context context) {
        // TODO Auto-generated method stub
        this.mycontext = context;
    }

    public void resetScores(){
        try {
        SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(mycontext); 
        Editor edit = pref.edit();

        edit.putInt("correct", 0);
        edit.putInt("incorrect", 0);
        edit.commit();
        } catch (Exception e) {
            Log.d("Scores", "Exception:" + e.toString());
        }

        return;
    }

}

Thx for any guidance

Eric

Answer 1

You probably want:

public class ScoresSub extends Scores
{
  public ScoresSub(Context context)
  {
     super(context);
  }
}

Since you defined a constructor taking parameters in Scores, the compiler doesn't provide a no-arg one.

Answer 2

When you create a class you don't always new to extend from another, all clases extend from the class Object and if you extend another like in this case class Application it is because you want its function and you want to make a variation of it or override some method and i think in this case you don't even need to extend from Application, because your class is not intended to be an Application so:

public class Scores {

    private Context mycontext;

    public Scores () {
        this.mycontext = null;
    }

    public Scores (Context context) {
        // TODO Auto-generated method stub
        this.mycontext = context;
    }

    public void resetScores(){
        try {
        SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(mycontext); 
        Editor edit = pref.edit();

        edit.putInt("correct", 0);
        edit.putInt("incorrect", 0);
        edit.commit();
        } catch (Exception e) {
            Log.d("Scores", "Exception:" + e.toString());
        }

        return;
    }

}

and i don't think you should have a problem.

Answer 3

What you have currently should work. In your main activity, don't call

Scores score = new Scores();

instead call

Scores score = new Scores(getContext());

Let me know if this works.