Refresh ListView after updating in another Activity

android, android-arrayadapter, listview

Solution

On clicking the item in your first Activity, start your second Activity with `startActivityForResult()`

And then in Second Activity, after entering in `EditText`, probably there is a button. And in `onClick` of that button call,

intent.putExtra("edittextvalue", findViewById(R.id.edittext).getText().toString());
setResult(RESULT_OK, intent);
finish();

Now you come back to your first Activity and here you have to implement `onActivityResult()` callback. You can extract data from that intent's extras and set that respective item in your array and call `notifyDataSetChanged()`.

This is ideally how you should be doing it.

If you want more info on how to use startActivityForResult() try this link - http://manisivapuram.blogspot.in/2011/06/how-to-use-startactivityforresult.html

Problem

I have two simple Activities - Activity1: ListView from an Array Activity2: EditText for editing the clicked row in Activity1 When I edit the value in Activity2 and returning to Activity1, the ListView doesn't reload the new value. I want to refresh the ListView when I return from Activity2 or resume Activity1 or something that will update the list. My code: ``` static ArrayAdapter<String> dataAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Loading the values to list array String[][] fulllist = loadArrays(); String[] list = new String[fulllist.length]; for(int i = 0; i<fulllist.length; i++) { list[i] = fulllist[i][1]; } // -------------------------------- dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list); setListAdapter(dataAdapter); } @Override public void onResume() { super.onResume(); // Loading the values to list array String[][] fulllist = loadArrays(); String[] list = new String[fulllist.length]; for(int i = 0; i<fulllist.length; i++) { list[i] = fulllist[i][1]; } // -------------------------------- dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list); dataAdapter.notifyDataSetChanged(); } ``` loadArrays() is just method that converts from SharedPreferences to String Array. Activity2 saves the new data in SharedPreferences and than Activity1 can read it (with the new data). If I return to the "main activity" (it is not Activity1) and than come back to Activity1 - the new data is shown, but I want this data will be updated when I return from Activity2 immediately. loadArrays() method: pastebin.com/MHwNC0jK Thanking you in advance!

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