Android SQLite ขอความช่วยเหลืออีกเรื่องครับผม เกี่ยวกับการค้นหา Search ข้อมูล

public void onResume() {
		super.onResume();
		
		mHelper = new FoodDBThai(this);
		mDB = mHelper.getWritableDatabase();
		
		mCursor = mDB.rawQuery("SELECT * FROM " + FoodDBThai.TABLE_NAME, null);
		
		listFood = (ListView)findViewById(R.id.listFood1);
    	listFood.setAdapter(updateListView());
		listFood.setOnItemClickListener(new OnItemClickListener() {
			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
					long arg3) {
				mCursor.moveToPosition(arg2);

				String id = mCursor.getString(mCursor.getColumnIndex(FoodDBThai.COL_ID));
            	String name = mCursor.getString(mCursor.getColumnIndex(FoodDBThai.COL_NAME));
            	String calories = mCursor.getString(mCursor.getColumnIndex(FoodDBThai.COL_CAL));
                String number = mCursor.getString(mCursor.getColumnIndex(FoodDBThai.COL_NUM));
                
				Intent intent = new Intent(getApplicationContext(), FoodUpdate.class);
				intent.putExtra("ID", id);
				intent.putExtra("NAME", name);
				intent.putExtra("CAL", calories);
				intent.putExtra("NUM", number);
				startActivity(intent);
			}
		});
	}
	
	public ArrayAdapter<String> updateListView() {
		arr_list = new ArrayList<String>();
		src_list = new ArrayList<String>();
		mCursor.moveToFirst();
		while ( !mCursor.isAfterLast() ){
			arr_list.add(mCursor.getString(mCursor.getColumnIndex(FoodDBThai.COL_NAME)) + "\n" 
 + mCursor.getString(mCursor.getColumnIndex(FoodDBThai.COL_CAL)) + " kcal" + "\t\t\t\t"
 + mCursor.getString(mCursor.getColumnIndex(FoodDBThai.COL_NUM)));
				mCursor.moveToNext();	
			
			listFood = (ListView)findViewById(R.id.listFood1);
	        listFood.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1
	        		, arr_list));
	        editText1 = (EditText)findViewById(R.id.editText1);
	        editText1.addTextChangedListener(new TextWatcher() {
	            public void afterTextChanged(Editable arg0) {
	                ArrayList<String> src_list = new ArrayList<String>();
	                int textlength = editText1.getText().length();
	                for(int i = 0 ; i < arr_list.size() ; i++){
	                    try {
	                        if(editText1.getText().toString()
	                                .equalsIgnoreCase(arr_list.get(i)
	                                .subSequence(0, textlength)
	                                .toString())){
	                            src_list.add(arr_list.get(i));
	                        }
	                    } catch (Exception e) { }
	                }
	                listFood.setAdapter(new ArrayAdapter(SearchFood.this
	                        , android.R.layout.simple_list_item_1, src_list));
	            }
	            public void beforeTextChanged(CharSequence s, int start
	                    , int count, int after) { }
	            public void onTextChanged(CharSequence s, int start
	                    , int before, int count) { }
	            
	        });
		}