android-arrayadapter

问题 I have an ArrayAdapter linked to a ListView. mListView.setAdapter(mArrayAdapter); Whenever I reset the ArrayList data to the ArrayAdapter: mArrayAdapter.clear(); mArrayAdapter.addAll(mArrayList); mArrayAdapter.notifyDataSetChanged() the ListView gets correctly updated however, if just after the above three lines, I call my custom method mListView.hasScrollbar() to detect whether the listview has a scrollbar or not, I get a null lastVisibleItem : public boolean hasScrollbar() { View

问题 I have a code which does following - Connect to a web service via HttpClient to PHP file Returns a result from an SQL query Returns format is a jArray (a JSONArray) for(int i=0; i < jArray.length() ; i++) { json_data = jArray.getJSONObject(i); int id=json_data.getInt("id"); String name=json_data.getString("name"); Log.d(name,"Output"); } When I look at the LogCat, I see all the "names" of the query, Each record is printed. I just need to plug these results into a ListView. How can I

问题 I have a code which does following - Connect to a web service via HttpClient to PHP file Returns a result from an SQL query Returns format is a jArray (a JSONArray) for(int i=0; i < jArray.length() ; i++) { json_data = jArray.getJSONObject(i); int id=json_data.getInt("id"); String name=json_data.getString("name"); Log.d(name,"Output"); } When I look at the LogCat, I see all the "names" of the query, Each record is printed. I just need to plug these results into a ListView. How can I

问题 I have stumbled upon a problem I can't quite get my head around, so I was hoping perhaps someone here have had the same problem or knew a good way of solving the problem. I have created a view containing a ListView. This ListView contains two TextView. The problem is that I don't know where I send the values which are meant to go in the second text view using the ArrayAdapter. Is there a way to send with more information to the ArrayAdapter so that I can feed the "todaysmenu" TextView? The

问题 I have implemented AutoCompleteTextView as follows: MainActivity.java ... public static String[] myData=new String[]{"Africa (AF)","America (AFM)","Apple (AMP)"}; text=(AutoCompleteTextView)v.findViewById(R.id.first_state); ArrayAdapter adapter = new ArrayAdapter(getActivity(),R.layout.autocompletetextview_row,R.id.textViewItem,myData); text.setAdapter(adapter); text.setThreshold(1); text.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View

问题 based on Hello-ListView turorial in Android, http://developer.android.com/resources/tutorials/views/hello-listview.html on the setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, COUNTRIES)); had an error because there is no R.layout.list_item previously i had followed the tutorial, created the file list_item.xml on the res/layout folder <?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent"

问题 I am trying to implement Searching in ListView . My ListView is comprised of HashMap in ArrayList and I managed to implement the logic but I guess there is much object and memory allocation in my approach each time the text change. Therefore I am looking for less memory allocated logic to search in my ListView with HashMap in ArrayList @Override public void onTextChanged(CharSequence s, int start, int before, int count) { //textlength = searchBar.getText().length(); //text_sort.clear();

问题 I am trying to implement Searching in ListView . My ListView is comprised of HashMap in ArrayList and I managed to implement the logic but I guess there is much object and memory allocation in my approach each time the text change. Therefore I am looking for less memory allocated logic to search in my ListView with HashMap in ArrayList @Override public void onTextChanged(CharSequence s, int start, int before, int count) { //textlength = searchBar.getText().length(); //text_sort.clear();

问题 I have an AutoCompleteTextView with a custom ArrayAdapter that uses ArrayList<Product> . I've came to the conclusion that a custom ArrayAdapter of an AutoCompleteTextView must implements Filterable and you have to make your own Filtering. From this SO-question & accepted answer and this example, I have made the following ArrayAdapter: public class AutoCompleteAdapter extends ArrayAdapter<Product> implements Filterable { // Logcat tag private static final String TAG = "AutoCompleteAdapter"; //

问题 I'm getting the following error: Error:(34, 53) error: no suitable constructor found for ArrayAdapter(AllStores,ListView,Response<List<Store>>) constructor ArrayAdapter.ArrayAdapter(Context,int,int,List<String>) is not applicable (actual and formal argument lists differ in length) constructor ArrayAdapter.ArrayAdapter(Context,int,List<String>) is not applicable (actual argument ListView cannot be converted to int by method invocation conversion) constructor ArrayAdapter.ArrayAdapter(Context