android-listview

问题 I need to get data from DB & displayed it as list with pagination. i.e. If i retrieved 4 items..i need to display first 2 items in first page. When i click next button.,remaining 2 items should be displayed which replaces old 2. How could i restrict data from DB as 2 like that? My code.. db.open(); // db.insertTitle("Money"); //db.insertTitle("make"); //db.insertTitle("make"); //db.insertTitle("make"); Cursor c = db.getAllTitles(); if (c.moveToFirst()) { do { String firstName = c.getString(c

问题 My main activity has multiple ArrayLists and Arrays . When you click the Smoked Cigarette button, the application logs certain information in the ArrayList . One of the ArrayLists locationsSmoked holds all the locations you've smoked at. My task is to make an activity that displays in a ListView the location you smoked at, and how many times you smoked there. If you display the locationsSmoked array currently it will look like this Home Home Home Work Work School School and so on and so forth

问题 I am working on a layout that needs to adapt to the kind of data I receive. I need to make this as generic as possible. So the layout in my adapter class needs to be modified dynamically according to the data. This is how I plan to do so. My activity xml layout: <LinearLayout> <LinearLayout id="1" ></LinearLayout> <LinearLayout id="2" ></LinearLayout> <LinearLayout id="3" ></LinearLayout> <LinearLayout id="4" ></LinearLayout> <LinearLayout id="5" ></LinearLayout> </LinearLayout> I have

问题 I am writing an App in which i need to update Quantity of an Item by using Tap on it in a ListView, i have tried several times but still not able to resolve this issue, please help me:: CartAdapter.java:: public View getView(final int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub View vi = convertView; if (convertView == null) vi = inflater.inflate(R.layout.listrow_cart, null); vi.setClickable(true); vi.setFocusable(true); vi.setOnClickListener(new

问题 This is how I see my screen the when the page loads. But when I start scrolling through the list, all my records start to change and it becomes really weird. I really don't know why, any suggestions? This is the screen after I scroll through my ListView up and down. Adapter: private class TechnicalDocumentationAdapter extends ArrayAdapter<TechnicalDocumentation> { private ArrayList<TechnicalDocumentation> items; public TechnicalDocumentationAdapter(Context context, int textViewResourceId,

问题 I have a ListView (in an Activity and not in a ListActivity ) that utilizes a custom cursor adapter to get some data from my local db and show them inside the ListView . lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View view, int position, long id) { Log.i(tag, "position = " + position); Log.i(tag, "id is : " + id)); } }); Assume my database columns are the following : id, name, surname, dob, height, gender, placeOfBirth,

问题 I am creating the custom list activity. There are two classes one is having extended ListActivity and other is having ArrayAdapter for that list activity. This listview contains a textview and a table layout. Problem is that i am calling getView for eg 2 times its is called automatically thrice, also when i am scrolling the lsitview a row is added automatically. Please suggest me why this is happening and what should i do to overcome this. xml for generating custom view displayweek.xml <?xml

问题 I have created a listview with simplecursoradapter and made it to Highlight when any of the item is clicked on it with the following code. <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_selected="true" android:drawable="@color/blue" /> <item android:drawable="@color/white" /> </selector> and on Item selected i have done as below. list = (ListView) view.findViewById(android.R.id.list); adapter = new SimpleCursorAdapter(getActivity(), R.layout.title

问题 I have this weird problem with position variable inside getView method of the adapter. 4 of those 6 different view types, got a button inside them. That button sends a message to a service (provoking some async stuff on the service), and within an indefinite amount of time after, this adapter gets a notifyDataSetChanged() provoked by the service. The problem shows when i spam the button that sends the message. If i spam it fast enough, the wrong position will be sent to the service. I think

问题 When the user scrolls quickly through items, it seems superfluous to start requesting images to populate those items. Afterall, the user is scrolling so fast, they will never be downloaded/shown in time. Is there any kind of method/event that first fires when the user has actually paused scrolling? 回答1: Try this code to detect scrolling stop : setOnScrollListener(new OnScrollListener() { public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { /