android-listview

问题 So I am creating an app with 5 activities that have 5 separate soundBoards in which are controlled by 5 separate soundPools. I am also using a navigational drawer on each activity. When I run the app it can open the first two activities but whenever I call the third to open the app stops working. On the memory monitor the memory usage peaks to 64MB and then it crashes. Is it just the emulator is limited to 64MB and that it will work fine on a phone or do I have a memory leak somewhere? Do I

问题 For example (Xamarin c# example, but concept is same for Android java also): "data" is the class which holds the data public override View getView (int position, View convertView, ViewGroup parent){ if( convertView == null ){ convertView = inflater.inflate(Resource.layout.my_list_item, parent, false); } //just for example , hence avoiding ViewHolder here var textView = convertView.FindViewById<TextView>(Resource.Id.textView2); var imageView = convertView.FindViewById<ImageView>(Resource.Id

问题 For example (Xamarin c# example, but concept is same for Android java also): "data" is the class which holds the data public override View getView (int position, View convertView, ViewGroup parent){ if( convertView == null ){ convertView = inflater.inflate(Resource.layout.my_list_item, parent, false); } //just for example , hence avoiding ViewHolder here var textView = convertView.FindViewById<TextView>(Resource.Id.textView2); var imageView = convertView.FindViewById<ImageView>(Resource.Id

问题 I have implemented a listview in my Android app (API 8). However, the list consists of only three elements and hence, more than half of the screen is empty. I want to expand the listview to cover the entire screen of the phone. What are some ways to do the same? Here is my layout XML file: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation=

问题 I fill my Array list in DB by this: db.addBookMark(new BookMark("Ravi", "9100000000")); db.addBookMark(new BookMark("Srinivas", "9199999999")); db.addBookMark(new BookMark("Tommy", "9522222222")); db.addBookMark(new BookMark("Karthik", "9533333333")); And read (all items from DB) by this: // Reading all contacts List<BookMark> bookmarks = db.getAllBookMarks(); and I create a xml layout listview.xml <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http:/

问题 final SimpleAdapter adapter = new SimpleAdapter(getActivity(), itemlist, R.layout.listview_custom_view_sales_products, new String[] { "Number", "item_name", "qty" }, new int[] { R.id.number, R.id.Name, R.id.value }) { public View getView(int position, View convertView, ViewGroup parent) { View view = super.getView(position, convertView, parent); HashMap<String, String> obj = (HashMap<String, String>) getListView().getAdapter().getItem(position); for (String x : added_items) { if (String

问题 I run into a problem where I need to enable my button in the ListView. The weird thing is : public class CookingStepAdapter extends ArrayAdapter<CookingStep> { ... private void addButtonToList(Button clock, Button skip){ if (list_clock_button == null) { list_clock_button = new ArrayList<Button>(); iterate = 0; } if (list_skip_button == null) list_skip_button = new ArrayList<Button>(); list_clock_button.add(clock); list_skip_button.add(skip); clock.setEnabled(true); skip.setEnabled(true); list

问题 I have implemented a master detail as follow: In the left I have a FragmentList and in the right I have a form related to the items of the list. When I press the save button, I need to update the list (in this case if the name is updated, the list has to be updated as well). When the app is in landscape I show the master/detail, if not I show only the list and when a name is pressed, I create a new activity. My problem here is that I couldn't update the list when the save button is pressed.

问题 I have listed a list with custom adapter to display different images in each list item and succeeded. Now i need to add a onitemclick listener for that list. Unable to access the id because the list id is - "@+id/android:list". Unable to identify this id. Any ideas please share. You will get some more idea when you see this below link Click here for the example i tried. 回答1: In the given example, the ListActivity is extended in CustomAdapterActivity.java so its simple to get Click events of

问题 I am trying to make a app in which i have used a custom list.The list contains text view and checkbox.The list contains few 30-40 datas in it.Now what i want is that i when user checks on a particular checkbox,the associated data with that checkbox should be added to the arrayList.I tried it but when i scroll my list the data from the list disapperas.Why this is happening COde public class EmailListAdapter extends BaseAdapter { private Context context; private ArrayList<EmailModel> data;