How to save and restore ListView position in Android

Question

I have tabView, displaying list in each tab. When I scroll in one tab, switch to another tab and return to previous tab, position is returned to the top instead of displaying pr

Answer 1

Override onSaveInstanceState to save the position, and set the position back in onRestoreInstanceState. The Bundle is sort of like a HashMap, (pseudo-code):

In onSaveInstanceState:

bundle.putInt("MyTabsPosition", getPosition());

Then in onRestoreInstanceState:

pseudo.setPosition(bundle.getInt("MyTabsPosition"));

Answer 2

To get the current position of your ListView, you can call

int position = mCatchList.getFirstVisiblePosition();

Then once you navigate back to the tab with that ListView, you can call

mCatchList.setSelection(position);

It will depend on how your code is written to tell if the position will need to be added to the savedInstanceState, or however.

Answer 3

In listView.setOnItemClickListener, use the saveLastPosition method. And after listview.setAdapter(adapter);call the getLastPosition method

public void saveLastPosition(){
    int position=listView.getLastVisiblePosition();

    SharedPreferences pref=PreferenceManager.getDefaultSharedPreferences(this);    
    SharedPreferences.Editor editor=pref.edit();
    editor.putInt("lastPosition",position);   
    editor.apply();
}

public void getLastPosition(){
    int position=listView.getLastVisiblePosition();

    SharedPreferences pref=PreferenceManager.getDefaultSharedPreferences(this);      
    int lastPosition=pref.getInt("lastPosition",position);
    listView.setSelection(lastPosition);
}

Answer 4

Don't call setAdapter() again on the list view. Do something like this.

if(myListView.getAdapter() == null)
    myListView.setAdapter(new myAdapter(this, R.layout.row, items));

If you need to update your ListView call notifyDataSetChanged() on the adapter.