android - listview get item view by position

Question

I have listview with custom adapter  base adapter   I want to get view from listview by position  I tried mListView getChildAt position    but it is not working  How can i get item view by position

User · Answer

This is the Kotlin version of the function posted by VVB. I used it in the ListView Adapter to implement the "go to next row first EditText when Enter key is pressed on the last EditText of current row" feature in the getView().

In the ListViewAdapter class, fun getView(), add lastEditText.setOnKeyListner as below:

lastEditText.setOnKeyListener { v, keyCode, event ->
    var setOnKeyListener = false
    if (keyCode == KeyEvent.KEYCODE_ENTER && event.action == KeyEvent.ACTION_UP) {
        try {
            val nextRow = getViewByPosition(position + 1, parent as ListView) as LinearLayout
            val nextET = nextRow.findViewById(R.id.firstEditText) as EditText
            nextET.isFocusableInTouchMode = true
            nextET.requestFocus()
        } catch (e: Exception) {
            // do nothing
        }
        setOnKeyListener = true
    }
    setOnKeyListener
}

add the fun getViewByPosition() after fun getView() as below:

private fun getViewByPosition(pos: Int, listView: ListView): View? {
    val firstListItemPosition: Int = listView.firstVisiblePosition
    val lastListItemPosition: Int = firstListItemPosition + listView.childCount - 1
    return if (pos < firstListItemPosition || pos > lastListItemPosition) {
        listView.adapter.getView(pos, null, listView)
    } else {
        val childIndex = pos + listView.headerViewsCount - firstListItemPosition
        listView.getChildAt(childIndex)
    }
}

User · Answer

You can get only visible View from ListView because row views in ListView are reuseable  If you use mListView getChildAt 0  you get first visible view  This view is associated with item from adapter at position mListView getFirstVisiblePosition

User · Answer

Use this    public View getViewByPosition int pos  ListView listView        final int firstListItemPosition   listView getFirstVisiblePosition        final int lastListItemPosition   firstListItemPosition   listView getChildCount   - 1       if  pos  lt  firstListItemPosition    pos  gt  lastListItemPosition             return listView getAdapter   getView pos  null  listView         else           final int childIndex   pos - firstListItemPosition          return listView getChildAt childIndex

User · Answer

Listview lv    ListView  findViewById R id previewlist        final BaseAdapter adapter   new PreviewAdapter this  name  age        confirm setOnClickListener new OnClickListener               Override         public void onClick View v                   TODO Auto-generated method stub               View view   null               String value              for  int i   0  i  lt  adapter getCount    i                       view   adapter getView i  view  lv                    Textview et    TextView  view findViewById R id passfare                     value et getText   toString                      Toast makeText getApplicationContext    value                   Toast LENGTH SHORT  show

User · Answer

workignHoursListView setOnItemClickListener new AdapterView OnItemClickListener          Override     public void onItemClick AdapterView lt   gt  parent View view  int position  long id            viewtype yourview yourListViewId getChildAt position  findViewById R id viewid

User · Answer

Preferred way to change the appearance whatever of row views once the ListView is drawn is to change something in the data ListView draws from  the array of objects that is passed into your Adapter  and make sure to account for that in your getView   function  then redraw the ListView by calling   notifyDataSetChanged      EDIT  while there is a way to do this  if you need to do this chances are doing something wrong  While are few edge cases I can think about  generally using notifyDataSetChanged   and other built in mechanisms is a way to go   EDIT 2  One of the common mistakes people make is trying to come up with their own way to respond to user clicking selecting a row in the ListView  as in one of the comments to this post  There is an existing way to do this  Here s how   mListView setOnItemClickListener new AdapterView OnItemClickListener            Parameters     parent      The AdapterView where the click happened      view        The view within the AdapterView that was clicked  this will be a view provided by the adapter      position    The position of the view in the adapter      id          The row id of the item that was clicked          Override     public void onItemClick AdapterView lt   gt  parent  View view  int position  long id              your code here             ListView has a lot of build-in functionality and there is no need to reinvent the wheel for simpler cases  Since ListView extends AdapterView  you can set the same Listeners  such as OnItemClickListener as in the example above

[android] android - listview get item view by position

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