android-arrayadapter

问题 I have a Arraylist that contain a hashmap . hashmap contain a Topic name, Name and value. For example hashmap object like this.(I did not add the key for the example.) {"Topic A", "Name 1" , "100"} {"Topic A", "Name 2" , "100"} {"Topic A", "Name 3" , "100"} {"Topic A", "Name 4" , "100"} {"Topic B", "Name 1" , "100"} {"Topic B", "Name 2" , "100"} {"Topic B", "Name 3" , "100"} {"Topic B", "Name 4" , "100"} {"Topic C", "Name 1" , "100"} {"Topic C", "Name 2" , "100"} {"Topic C", "Name 3" , "100"}

问题 I have created a custom ArrayList which is working as it should barring an issue with the onClick. I orginally had the ArrayList highlight the selected row in red when the user clicked on the row. However, I also required the position of that click outside of the ArrayAdapter class. The only way I could seem to do this is by adding an onClickListener, however this is were the issues began, although this solved my issue of getting the position the user click on, the row highlighting now seems

问题 I have a gridview that gets populated with ArrayAdapter. Within the GridView I have a Button and ImageView. I made a Listener for the Button and Image however I would like to start a Fragment once I tap on the ImageView. And I got the Error in using getSupportFragmentManager();. holder.imageView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { FragmentManager fragmentManager = getSupportFragmentManager(); FragmentTransaction fragmentTransaction =

问题 In my application I have a ListView and ArrayAdapter . When I select some one element in ListView I can see also few more selected elements. Furthermore, when I scroll elements in ListView (after selection) then my selection disappears and elements are selected randomly. Code of adapter: final ListAdapter adapter = new ArrayAdapter<BinLocationsComponent>(activity, R.layout.simple_list_item_multiple_choice, locationComponents) { @Override public View getView(int position, View convertView,

问题 I am new to android and I am trying to create a list view using an array adapter, a run method and multi threading , but I'm receiving the following error: 07-14 19:00:15.605 29316-29316/com.protogeo.moves.demos.apps W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa4b8f648) 07-14 19:00:15.633 29316-29316/com.protogeo.moves.demos.apps E/AndroidRuntime﹕ FATAL EXCEPTION: main java.lang.NullPointerException at android.widget.ArrayAdapter.getCount(ArrayAdapter.java:330) at

问题 I want to display two strings one below other as if it is a list. I tried using simple_list_item_1 to populate listview but nothing is visible on the screen. ((ListView)view).setAdapter(new ArrayAdapter<String> (RealScreen.getAndroidBaseContext(),android.R.layout.simple_list_item_1, label)); where label is an array which contains two items to be displayed. All I can see is a white screen. Also I want this list to be unclickable. I want the output to be like this: String 1 String 2 I am not

问题 I'm creating an Android application. Inside a Fragment I have a ListView that is populated using an ArrayAdapter and an ArrayList . I'm using android.R.layout.simple_list_item_1 for the layout for the list items. I want to have an OnItemClickListener , so that when an item is clicked it will show another Activity based on its data. The problem is, there may be items with the same name. I'd like to attach an ID value to each of the elements, so that my code can distinguish them from each other

问题 I've been unable to get my ListView to sort. When I type in the SearchView, nothing happens. My ListView has no changes. I've been comparing examples found here and elsewhere with no luck. I've confirmed through debugging that the filter actually does work, I can see the filteredArray being populated with what filtered data, but again, no ListView change. Here is what I have so far. In MainActivity.class.. public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main,

问题 I'm faced with this problem java.lang.UnsupportedOperationException What I want to do is easy, I'll show you an example. MyList Blue Red Green When I make an OnItemLongClickListener() for example on Green , my list should looks like : MyList Green What I've tried is final ArrayAdapter < String > adapter = new ArrayAdapter < String > (getActivity(), android.R.layout.simple_list_item_1, FileBackup.getFilesFound()); adapter.setNotifyOnChange(true); lv.setAdapter(adapter); lv

问题 I am trying to modify a code that I have seen on stackoverflow for an AutoCompleteTextView so that i would return mutliple contacts for a MultiAutoCompleteTextView. However, when I load this onto my Android phone I can no longer see any suggestions to select from. I have feeling that the problem lies in the ArrayAdapter initialization but I cannot figure out what is wrong with it. Thanks in advance for any help. I have the following code for my multiautocompletetextview: