android-listview

问题 I have a custom ListView . Each row contains a TextView and ImageView . Look at screenshot: On Item click I make that ImageView visible. But the problem is that only ONE ImageView should be visible at a time. I think that the best approach is to set all other ImageViews as INVISIBLE on click. And after all images gone make a clicked one VISIBLE . But I don't know how to iterate properly that in Adapter : private class TimeZoneItemAdapter extends ArrayAdapter<String> { private Activity

问题 i am trying to change the image of the listview's item,if user select the item,its image change permanently .but with my code only single item is changed when user click on other item the previously changed item get changed to default and new selected item get change and so on.how to make this change permanently..?? MainActivity List<RowItem> rowItems; private BaseClass adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Singleton

问题 I am populating a list by extending ListActivity . I have added a header to the list to show the total count of items in the list. I have maintained the header view in a separate layout file header.xml as shown below. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:id="@+id/headerTextView" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text=

问题 Fragments @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { //inflater provided View view; ... return view; } BaseAdapter: @Override public View getView(int position, View convertView, ViewGroup parent) { //have to make a constructor to get an inflater .... return view; } Why does BaseAdapter 's getView() method parameters doesnt provide an LayoutInflater unlike Fragment 's onCreateView() ? Wherein in this method we are expected to

问题 I"m tring it refresh my listview when my sqllite database is change (when delete or update query). the querys itself works just fine, but it doesn't update the listview layout, only when i"m exiting the acitvity and renter it the liseview is changing. I tried the methodes: notifyDataSetChanged() requery() the code of the activiy is: public class ShowListActivity extends ListActivity { private ItemsDataSource itemsDataSource; private String source[] = new String[] {MySQLiteHelper.KEY_NAME,

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Maintain/Save/Restore scroll position when returning to a ListView how to save scroll position in the ListView? I should to add elements into the head of the ListView and into an arbitrary position, but visual part should NOT be scrolled. for example I have 123 elements, I see 1/2 part of the element with index 66 (elements have a different height). I added an element into the list, and I should to see 1/2 part

问题 I am getting some data from the net, which gets parsed with JSoup in a AsyncTask. I am having trouble filling the listview correctly. Edit1 only gets filled with empty fields (..) and the last rows have the value € 0,00. Edit2 does not get filled at all. .. edit2Text .. edit2Text .. edit2Text € 0,00 edit2Text € 0,00 edit2Text Both Edits are in a test.xml: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill

问题 In my project I've setted the background color of my items (composed of several elements inserted in a ConstraintLayout) inside a ListView but the default animation of click and long click disappears if the background color is not at least a little transparent. In fact, as transparency decreases, the effect of clicking on the elements is less and less evident. In a few words, color goes to hide the animation if isn't transparent. How to solve this problem and then bring selection animation to

问题 I am populating the ListView from my Custom DataAdaptor. I have a layout defined for each item/row of the listview. Inside that ListView i have an AutoCompleteTextView. I need to bind it with data from SQLite database. Actually this AutoCompleteTextView will list categories & these categories will come from a SQLite Table.I can bind it in my Custom DatAdapeter class inside getView() but i don't know how to avoid the multiple calls to the SQLite database? As the categories will remain the same

问题 Scenario: I am using a listview with custom Adapter. I am fetching data every 5 seconds and then displaying it in the listview. Problem: After every refresh the list scrolls at the top. I would want the list to stay as is from the scroll standpoint and just the underlying data to be refreshed. Current code: This is called every time I fetch a new data. mListAdapter = new CustomListAdapter(this, mListData); mList.setAdapter(mListAdapter); 回答1: Instead of your code please try to put every time