A couple of reasons to recycle views: Object creation is relatively expensive. Every additional object that is created needs to be dealt with by the garbage collection system, and at least temporarily increases your memory footprint This is more important for more complex views, but inflating and laying out the view objects can be expensive. … Read more
It’s not a matter of ArrayAdapter being thread safe. ListView and other such UI widgets that work with an Adapter do not allow the contents of the adapter to change unexpectedly on them. And this is more than just due to other threads — you need to tell the ListView about the change you make … Read more
Your row layout needs to be Checkable for setItemChecked() to work, in which case Android will manage calling setChecked() on your Checkable as the user clicks on the row. You would not need to be setting up your own OnCheckedChangeListener. For more, see: ListView with CHOICE_MODE_MULTIPLE using CheckedText in a custom view Multiple choice list … Read more
you can also do like this.. moreListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub Log.d(“############”,”Items ” + MoreItems[arg2] ); } });
I was looking at the Spinner source code and it seems like you can’t do that with a spinner. The Spinner has its own private interface called SpinnerPopup which defines how dropdown items can be shown. This is currently based on the spinnerMode allowing for a dropdown or dialog list. Both options are also implemented … Read more
Your problem are this lines: this.original = items; this.fitems = items; Items is the list you use for your ListView and putting it in two different variables does not make two different lists out of it. You are only giving the list items two different names. You can use: this.fitems = new ArrayList(items); that should … Read more
Return true in areAllItemsEnabled() and false in isEnabled for specific item. The disabled item wont be clickable but you will still be able to view the divider lines Note: This doesn’t work for Android 5
If we look at the following code, we have name and value array in getView and getDropDownView. private void initView() { SpinnerDropDownAdapter sddadapter = new SpinnerDropDownAdapter(this); ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, sddadapter.name); Spinner getViewSP = (Spinner) findViewById(R.id.getview_sp); getViewSP.setAdapter(adapter); Spinner getViewWDropDownSP = (Spinner) findViewById(R.id.getview_w_drop_down_sp); getViewWDropDownSP.setAdapter(sddadapter); } static class SpinnerDropDownAdapter extends BaseAdapter implements SpinnerAdapter { Context … Read more
Convert your String array to ArrayList and pass it to Adapter and use below code or change below code with your String[]. You need to implement Filterable to your Adapter class and Override getFilter() Checkout this complete example for filtering custom Adapter. public class ListFilterActivity extends ListActivity { private List<String> list = new ArrayList<String>(); List<String> … Read more
1: The LayoutInflater takes your layout XML-files and creates different View-objects from its contents. 2: The adapters are built to reuse Views, when a View is scrolled so that is no longer visible, it can be used for one of the new Views appearing. This reused View is the convertView. If this is null it … Read more