How to refresh ListView dynamically?

I am making a ListView with TextView and 1 delete button for each row. To populate the list I am using my custom adaptor (extends base adapter) and sqlite db to map into list. My requirement is onclick of delete button in a row that record should be deleted and list should refresh. I am able to delete record from db but my list is not refreshing until I rotate the device or assign a new instance of my adapter from activity. I have tried following answer but didn't work in my case. the difference between this answer and my case is I am using baseAdapter and he is using cursorAdapter. ``` public class BookmarksPDFAdapter extends BaseAdapter { public View getView(int position, View convertView, ViewGroup parent) { openDatabase(); btnDelete.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { deleteBookmark(getLocation(v));//getlocation(View) method returns which delete button clicked notifyDataSetChanged(); } }); } closeDatabase(); return convertView; } ``` my activity looks like ``` public class BookmarkActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.bookmarks); btnEdit = (Button) findViewById(R.id.edit_bookmarks); btnAdd = (Button) findViewById(R.id.add_bookmarks); list = (ListView) findViewById(android.R.id.list); adapter = new BookmarksPDFAdapter(this); list.setAdapter(adapter); } ``` bookmark.xml ``` <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:weightSum="10.0" android:paddingTop="5dp"> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" android:padding="3dip" android:layout_alignParentLeft="true" android:weightSum="1.0" android:layout_marginRight="5dip"> <ImageView android:id="@+id/iconShow" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/delete_icon" android:visibility="invisible" android:layout_weight="1.0"/> </LinearLayout> <TextView android:id="@+id/bookmark_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="6dp" android:layout_weight="7.0" android:gravity="center_horizontal|center_horizontal" android:lines="1" android:text="@+id/TextView01" android:textSize="24dp" /> <Button android:id="@+id/btnDelete" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="right" android:layout_weight="2.0" android:text="@string/btn_txt_delete" android:visibility="invisible" > </Button> ``` listitem.xml ``` <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:weightSum="10.0" android:paddingTop="5dp"> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" android:padding="3dip" android:layout_alignParentLeft="true" android:weightSum="1.0" android:layout_marginRight="5dip"> <ImageView android:id="@+id/iconShow" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/delete_icon" android:visibility="invisible" android:layout_weight="1.0"/> </LinearLayout> <TextView android:id="@+id/bookmark_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="6dp" android:layout_weight="7.0" android:gravity="center_horizontal|center_horizontal" android:lines="1" android:text="@+id/TextView01" android:textSize="24dp" /> <Button android:id="@+id/btnDelete" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="right" android:layout_weight="2.0" android:text="@string/btn_txt_delete" android:visibility="invisible" > </Button> ``` deleteBookmark method ``` void deleteBookmark(int wantedChild) { String bookmarkItem = getBookmarkItemText(wantedChild, true); datasource.open(); int check = datasource.deleteBookmark(bookmarkItem); if (check == 1) { btnDelete = (Button) (viewList.get(wantedChild) .findViewById(R.id.btnDelete)); btnDelete.setText(R.string.btn_txt_deleted); btnDelete.setEnabled(false); } datasource.close(); } ``` Here I am deleting record from my database and changing text of delete button from delete to deleted