android-arrayadapter

问题 I see the documentation says this method returns the position of the given item, but what would it return if no such item exists in the ArrayAdapter? 回答1: After looking through the source code I've found that the ArrayAdapter uses List.indexOf(Object) to find the object and this method returns -1 when it doesn't exist. GrepCode is awesome for finding stuff when the documentation is bad, I use it at least once a day :) Source: GrepCode 来源： https://stackoverflow.com/questions/6715222

问题 I'm trying to create a custom ArrayAdapter to use for my ListFragment . Right now nothing is being displayed in the ListFragment except for the TextView saying what Fragment number it is. I have put a breakpoint in getView() method of my adapter and it is not being called. I searched for reasons that wouldn't be called and some people seem to think that my ListView is hidden, so I've tried changing the layout_height to wrap_content , but that didn't work. Also, I've been following the code

问题 I have a custom ListView with two button and I when I click either button on any row I want to get the text label on the Listview and for now just popup a toast with it. So far nothing has worked I keep getting the last item in my array. Here is a screen shot to give you a better idea of what i mean Here is my Adapter subclass for my custom ListView static final String[] Names = new String[] { "John", "Mike", "Maria", "Miguel"}; class MyArrayAdapter extends ArrayAdapter<String> { private

问题 This is a follow on from an earlier question: ImageButton within row of ListView android not working But after suggestions from SO gurus it has been suggested I post a new question. The issue is that I have a custom adapter that is not showing any data. I have looked into other questions, but it didn't provide a solution. In my Main Activity I have a couple of buttons, one of them: ToDo, should create a row that displays data from a SQLite database, and depending on some factors (dates mainly

问题 I'm kind of new to Android and I have to make a Bluetooth connection between two PCBs. I saw a line of code in API guides and I still haven't figure out what it means. I wonder if someone can help me. Here's that code: Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices(); What I can't understand is Set<BluetoothDevice> ! Why does they put something between "< >" . I've also seen than in ArrayAdapter<String> . What these elements do? 回答1: That makes the Set a Generic set.

问题 I'm developing an application with ListView for Student Marklist creation. In this application, the List have 10 students. There are four grades provided for the exam which was conducted to those Students. One student can adapt only one grade from the four. The teacher will assign the grade to the student in ListView . My xml file Studentlist.xml is as follow: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width=

问题 I'm creating a searchable spinner using third party library. I have added library classes(SearchableListDialog, SearchableSpinner) in my app. Everything is working fine but still one problem I'm facing for example, In search-view widget if I search Abc, I'm not getting the result filtered as Abc but when clicking on the list-view items, results is showing item as Abc. It is like the position is change for the items but the list is not showing the searchable result. I'm not getting where is I

问题 i write a own ArrayAdapter like this one: public class PoiListAdapter extends ArrayAdapter<Poi> implements Filterable { private Context context; private final List<Poi> valuesPoi; private ItemsFilter mFilter; public PoiListAdapter(Context context, List<Poi> valuesPoi) { super(context, R.layout.poilist); this.context = context; this.valuesPoi = valuesPoi; } @Override public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater inflater = (LayoutInflater) context

问题 I have a TextView in my ArrayAdapter that may contain some hyperlinks. For those links I use Linkify : public View getView(int position, View convertView, ViewGroup parent) { View rowView = convertView; if (rowView == null) { rowView = inflater.inflate(R.layout.list_item_2, null); holder = new ViewHolder(); holder.content = (TextView) rowView.findViewById(R.id.postContent); holder.date = (TextView) rowView.findViewById(R.id.postDate); rowView.setTag(holder); } else { holder = (ViewHolder)

问题 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