android-listview

问题 I am new android now I want to display image from an url. I am using imageview in listview. I want to add the list of images into the each row of the list item. I used SimpleAdapter but the imageview shows blank. Here's the main activity: package com.example.mysqltest; import java.util.ArrayList; import java.util.HashMap; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.ListActivity; import android.app.ProgressDialog; import android

问题 Attached are 2 photos one when the list is populated using the onCreateView when the app starts(white text) and the other is whenever the SetList() method is called http://i.stack.imgur.com/QHNEL.png public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); ListView lv = (ListView) rootView.findViewById(R.id.listView1); ArrayAdapter<String> adapter = new ArrayAdapter<String>((

问题 For demonstration, I have a ListView displaying a list of numbers. I would like to achieve the effect that when the user scrolls the ListView and the scrolling ends, it will only stop at certain positions so that the first visible item is always shown completely. I've attached my attempted code below. It works when users drag to scroll the ListView. But when there's fling, the normal acceleration is interrupted, causing an unnatural stop. My question is, how can I take acceleration caused by

问题 My ListView should automatically scroll to end, when new message received or sent. But when I use Android keyboard to send message from EditText below ListView, ListView resized and new message, which I want to send, appears out of screen and I have to scroll down to see it, even if keyboard disappears and ListView resizes again. To scroll ListView I use: listView.postDelayed(new Runnable() { @Override public void run() { listView.setSelection(listView.getCount()); } }, 100); but is not

问题 My TextSwitcher for each record in ListView should display first value ( text1 ) and then another value ( text2 ), then first value again and so on. It should happen only if text2 not empty. Otherwise text1 should be always shown (without any changes and animation). I've created Runnable() , which changes boolean variable ( time2 ) to then call items.notifyDataSetChanged() . It works as expected and in result setViewValue() for my ListView is called. Here is the code: items.setViewBinder(new

问题 i have a listview that displays a set of rows, each row is clickable. now, i wish to group similar type of rows under one header something like as shown in the figure (mocked up). could some please advise or provide an approach for this. 回答1: Add an extra paremeter for the 'category' of each listview item. Then implement something like 'StickyListHeaders' based on that parameter. 回答2: I've used AmazingListView in the past with some effectiveness. It is an implementation of the Google I/O

问题 I am loading pictures (below ~3MB in size) into Cardview from a database and it was infalte in Listviewstview. The loading and browsing of these pictures is way too slow. Is there any method to downscale these pictures to speed up & sometimes dispalyind [Duplicate] images on other card view? cardview xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"

问题 I'm using loader in my ListView fragment, and it's getting recreated on pressing "back" button. Can you tell me how to handle this senario? Here is my ListView fragment code. Here I have a boolean variable that I'm setting as true on clicking on list item. but once the back button is pressed onCreateView will get called so the backbutton will be false. public class GTFragment extends SherlockFragment implements LoaderCallbacks<Cursor>{ ListView mTListview = null; GoogleTasksAdapter

问题 I am using a ListView as shown below in filename browse.xml. <ListView android:id="@+id/listView1" android:layout_width="250dp" android:layout_height="match_parent" android:layout_alignParentLeft="true" android:layout_below="@+id/relativeLayout1" > </ListView> And I am filling this listView inside onCreate() method as: files1=new ArrayList<String>(); File sdcard=Environment.getExternalStorageDirectory(); files1 = getListFiles(new File(sdcard.getAbsolutePath()+File.separatorChar));

问题 I'm developing Expandablelistview in Android. In the GroupView has only a title and every group has different ChildView. This code is working fine and i'm able to see different ChildView's in every Group item. In ChildView i have an EditText and when i click on done button i want to get all EditText and Spinner values which are inputs by user. When i click on done button at that time, i want to get details which is filled by user in Group items Customer Location etc. For a example : the image