Question

I am not sure I am doing this right, with my limited knowledge of this programming language… or any for that matter. Let’s see if I can make this make sense so I can get some help.

I am running a query against my database to pull out all entries in the database

Part of DBAdapter.java:

//***RETRIEVES ALL THE FINALSCORES***//
public Cursor getAllFinalscores()
{
    return db.query(DATABASE_TABLE, new String[] {
            KEY_ROWID,
            KEY_DATE,
            KEY_FINALSCORE,
            KEY_HOLESPLAYED},
            null, null, null, null, null);
}

I have then created a separate class which extends ListActivity (because I want all of the contents to be displayed in a listview.

PastGames.java

import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class PastGames extends ListActivity {

@Override

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.pastgames);



    DBAdapter db = new DBAdapter(this);

    db.open();
    Cursor c = db.getAllFinalscores();
    if (c.moveToFirst())
    {
        do {
            String[] listData = new String [] {c.getString(1),
                    c.getString(2), c.getString(3)};
            this.setListAdapter(new ArrayAdapter<String>(this,
                    R.layout.pastgames, listData));
        }
        while (c.moveToNext());
    }
    db.close();


}

}

and then I am calling that from my Main activity (which just to note, does not extend ListActivity

    @Override
public boolean onOptionsItemSelected(MenuItem item) {

    switch (item.getItemId()) {
case R.id.past_games:
            Intent intentListGames = new Intent().setClass( this, PastGames.class );
            this.startActivityForResult( intentListGames, 0 );
            return true;
   }
        return true;
    }

---

So, if I understand this correctly, I am calling PastGames.java from my main activity (which then launches PastGames.java) and within PastGames.java – onCreate I am opening the db, running my query, closing and hopefully putting into listview

I get the following in LogCat when I run that option in emulator:

06-13 22:10:36.581: ERROR/AndroidRuntime(204): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.deckert/com.deckert.PastGames}: java.lang.ClassCastException: android.widget.TextView
06-13 22:10:36.581: ERROR/AndroidRuntime(204):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
06-13 22:10:36.581: ERROR/AndroidRuntime(204):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
06-13 22:10:36.581: ERROR/AndroidRuntime(204):     at android.app.ActivityThread.access$2200(ActivityThread.java:119)

Could someone please help me understand why this isnt working?

Thank you in advance and I apologize for the huge post!

Answer 1

You are using the same layout in both your ArrayAdapter and your PastGames Activity root view. I imagine that you do not want to use the ListView‘s layout for your Activities layout. I think this is what is causing the ClassCastException, because your ListView‘s layout is probably defined to use just a simple TextView, and the Activity is blowing up saying that it cannot cast a ListView to a TextView.