sqlite에서 데이터를 읽어와서 listview에 뿌려주려고 하는데 sdk실행에는 어떤 오류도 안뜨지만 출력이 안되네요 

좀 도와 주시면 안될까요? ㅜㅜ

import java.util.ArrayList;

import android.view.View.OnClickListener;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.Toast;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

public class HighScoreActivity extends Activity implements OnClickListener {

DataBaseTableConnect myDB;

SQLiteDatabase mDatabase;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.high_score);

myDB = new DataBaseTableConnect(this);

findViewById(R.id.list_highscore_btn).setOnClickListener(this);

findViewById(R.id.exit_ok).setOnClickListener(this);

}

public void onClick(View v)

{

switch(v.getId())

{

case R.id.list_highscore_btn :

mDatabase = myDB.getReadableDatabase();

Cursor cur;

String Str_Line;

cur = mDatabase.rawQuery("SELECT bun, name, score FROM HighScore", null);

ArrayList<String> ar = new ArrayList<String>();

while(cur.moveToNext())

{

String sbun = cur.getString(0);

String sname = cur.getString(1);

String sscore = cur.getString(2);

Str_Line = String.format("%4s%10s%10s", sbun, sname, sscore);

ar.add(Str_Line);

}

ArrayAdapter<String> adapt;

adapt = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, ar);

ListView list = (ListView)findViewById(R.id.list_highscore);

list.setAdapter(adapt);

Toast.makeText(this, "Complete inquiry", Toast.LENGTH_SHORT).show();

break;

case R.id.exit_ok : 

Toast.makeText(this, "Thank you -SY, SJ-", Toast.LENGTH_LONG).show();

finish();

break;

}

}

/********데이터베이스 연결, 테이블 생성 클래스**********/

class DataBaseTableConnect extends SQLiteOpenHelper {

public DataBaseTableConnect(Context context){

super(context, "High_Score.db", null, 1);

}

public void onCreate(SQLiteDatabase mDatabase){

mDatabase.execSQL("CREATE TABLE HighScore (bun INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, score NUMERIC);");

}

public void onUpgrade(SQLiteDatabase mDatabase, int oldVersion, int newVersion){

mDatabase.execSQL("DROP TABLE IF EXISTS HighScore");

onCreate(mDatabase);

}

}

}