android-listview

问题 I have a listview and I override the onScroll event for it so that I can get the first character of the text on the first visible item of the listview. My code is as follows: @Override public void onScrollStateChanged(AbsListView view, int scrollState) { // } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { ListView caller = (ListView) view; View v = caller.getChildAt(firstVisibleItem); if(v instanceof TextView){ TextView tv =

问题 I am using listview with images in my application.But whenever I scroll the list the wrong images are shown first and then the correct images are displaying.I dont know why it is happening like this.I think already loaded images are displaying until the position is set. Here is my adapter class,please help me where I am going wrong public class MySimpleArrayAdapter extends ArrayAdapter<String> { private Activity context; ArrayList<String> namear,msgar,idar,profimage,postimage,commentsnum

问题 I am trying to play videos in my listview just like Vine or Instgram. I have been trying to use TextureView with a media player except that when attaching TextureView to the media player I experience issues where the textureview is not being reused properly by the GetView method. The textureview renders some old incorrect videos when scrolling down in my list. Does anyone know how to play videos in ListViews (Not using VideoView!!!)?? 回答1: Just wanna give you advice. You can use WebView

问题 List view clickable link poblem. I'm using the following code inside the getView() to generate a clickable link in a listview. myTextView.setMovementMethod(LinkMovementMethod.getInstance()); String linkText = "<a href=\"http://www.google.com\">Google</a>"; myTextView.setText(Html.fromHtml(linkText)); This code works fine on a textview which is not in a listview but when i use it for a textview within a list view the following exception is raised on clicking the link. AndroidRuntimeException:

问题 How to check the CheckBox of ListView when item clicked? I have a ListView with CheckBox, TextView, Button. Here i want to select multiple rows of ListView and so used CheckBox. If i click on a row, i want to make its corresponding CheckBox to be checked and get the RowID of the clicked item of ListView. If i click on Button, i want to open a pop-up or another Screen(Activity) but CheckBox must not be checked. How to do this? Please help. Thanks in advance. Edit: This is how my layout looks.

问题 Hey people I'm Implementing TreeView using ExpandableListView . But I have some measure problem that I unfortunately can't solve it. Here's ScreenShots of the problem: You can see that there are problems in measuring. As long as I'm new to Android I don't really understand onMeasure() method. I have 1 ExpandableListView and in it's getChildView() i return CustomExapndableListView -s. Here's code: ExpandableListAdapter : public class ExpandableListAdapter extends BaseExpandableListAdapter {

问题 In my app I retrieve a user's playlist from the server and feel a ListView with the data. The problem is, that the ListView does not highlight clicked rows. To prevent rage comments telling me that I don't use search here are things I've tried: setting the button in my row to non-focusable setting the listSelector both by code and XML (not at the same time) trying to change the background of passed View in an OnItemClickListener using setItemsCanFocus() with bot true and false parameters

问题 I have a list view. I want to add a map inside each list item. The map will show/hide when I click on the list item. When the map shows, I can zoom, view location detail... on it. But I can't set MapFragment in the adapter. So, give me some solutions. Thank you. gMap = (MapFragment) getFragmentManager().findFragmentById(R.id.map); googleMap = gMap.getMap(); I can't do that in getView. 回答1: I just went through a similar problem and I came up with the following solution. By the way, now play

问题 I have a ListView with a number of items (animals), of diverse heights. Using OnScrollListener I am trying to track which item intersects a specific location on the screen. Say the location in question is creatureMarkerBottom = 140 . The code below seems to be returning faulty data when I run the code: I keep getting false positives and false negatives. Here is the code. The code is supposed to make the marker go solid or transparent depending if a chicken is intersecting it. However, the

问题 I have an array column called "Roots" in a user class from parse.com and I want to retrieve the array object from the column and then extract the values (strings) to an array in my application. ParseUser.logInInBackground(user, password, new LogInCallback() { public void done(ParseUser user, ParseException e) { if (user != null) { // Hooray! The user is logged in. startMenu(); String[] testStringArray = (String[])user.get("Roots"); I'm not sure if the last line even works. Even if it does, I