Question

I am currently unable to view newly inserted sqlite data from my ListView without restarting my whole application. Currently when a ListView item is selected, a new activity starts showing detailed information. once the detailed info is updated, edited, or the item is deleted the ListView is shown again but contain all original data unless app it closed and restarted. list view OnResume method is below. How do I refresh ListView when ever it is shown on screen. my attempts on adding .notifyDataSetChanged was unsuccessful. Not sure I implemented it correctly.

    public List<String> populateList (){

List<String> webNameList = new ArrayList<String>();

dataStore openHelperClass = new dataStore (this);

SQLiteDatabase sqliteDatabase = openHelperClass.getReadableDatabase();

Cursor cursor = sqliteDatabase.query(dataStore.TABLE_NAME_INFOTABLE, null, null, null,  null, null, dataStore.COLUMN_NAME_SITE, null);

startManagingCursor(cursor);

while (cursor.moveToNext()){

String sName = cursor.getString(cursor.getColumnIndex(dataStore.COLUMN_NAME_SITE));
String wUrl = cursor.getString(cursor.getColumnIndex(dataStore.COLUMN_NAME_ADDRESS));
String uName = cursor.getString(cursor.getColumnIndex(dataStore.COLUMN_NAME_USERNAME));
String pWord = cursor.getString(cursor.getColumnIndex(dataStore.COLUMN_NAME_PASSWORD));
String lNotes = cursor.getString(cursor.getColumnIndex(dataStore.COLUMN_NAME_NOTES));

LoginDetails lpDetails = new LoginDetails();

    lpDetails.setsName(sName);
    lpDetails.setwUrl(wUrl);
    lpDetails.setuName(uName);
    lpDetails.setpWord(pWord);
    lpDetails.setlNotes(lNotes);

    loginArrayList.add(lpDetails);
    webNameList.add(sName);
 }

   sqliteDatabase.close();
   return webNameList;
 }



  @Override
   protected void onResume() {
   super.onResume();
   loginListAdapter = new ArrayAdapter<String>(this,        android.R.layout.simple_list_item_1, populateList());
    loginList.setAdapter(loginListAdapter);
 }

  @Override
   public void onItemClick(AdapterView<?> arg0 , View arg1, int arg2, long arg3) {
   Toast.makeText(getApplicationContext(), "Selected ID :" + arg2,     Toast.LENGTH_SHORT).show();

Intent updateDeleteLoginInfo = new Intent (this, UpdateDeleteLoginList.class);

LoginDetails clickedObject = loginArrayList.get(arg2);

    Bundle loginBundle = new Bundle();
loginBundle.putString("clickedWebSite",clickedObject.getsName());
loginBundle.putString("clickedWebAddress",clickedObject.getwUrl());
loginBundle.putString("clickedUserName",clickedObject.getuName());
loginBundle.putString("clickedPassWord",clickedObject.getpWord());
loginBundle.putString("clickedNotes",clickedObject.getlNotes());

updateDeleteLoginInfo.putExtras(loginBundle);

startActivity(updateDeleteLoginInfo);

Answer 1

You’re using startActivity. Why don’t you use startActivityForResult instead? The answer to this question details how you would call the second Activity. Once it returns, you would have to use the notifyDataSetChanged() call.