Listview de veri listeleme

Aşağıda yazdığım activity açılır açılmaz kapanıyor.Sebebi ne olabilir? package com.ct.asg.ct;

import android.app.Activity; import android.content.Intent; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.widget.Adapter; import android.widget.ArrayAdapter; import android.widget.ListAdapter; import android.widget.ListView;

import java.util.ArrayList;

public class TamlisteActivity extends Activity { private Veritabani2 veritabani2 = new Veritabani2(this);

@Override
public void onBackPressed() {
    Intent i = new Intent(TamlisteActivity.this, MainActivity.class);
    startActivity(i);
    finish();
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_tamliste);
    final ListView liste = (ListView) findViewById(R.id.liste);
    final ArrayList<String> kisiler = new ArrayList<String>();
    SQLiteDatabase db = veritabani2.getReadableDatabase();
    Cursor c = db.rawQuery("SELECT _id,ad,cz,yil,ay FROM KisiTablosu", null);

    final ArrayList<Integer> ekle = new ArrayList<Integer>();
    int i = 1;
    if (c.getCount() != 0) {
        while (c.moveToNext()) ;
        {

            final String ad = c.getString(c.getColumnIndex("ad"));
            final int id = c.getInt(c.getColumnIndex("_id"));
            ekle.add((int) id);
            kisiler.add(i + "-)" + ad);
            i++;
            ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, kisiler);
            liste.setAdapter(adapter);

        }
        c.close();

    }
    else{
        Intent I= new Intent(this,MainActivity.class);
        startActivity(I);
    }

}

}