android-listview

RelativeLayout as listview item

寵の児 提交于 2019-12-04 10:06:46
Consider following RelativeLayout as list view item: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/bigfoo" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:text="bigfoo" android:textSize="60sp"/> <TextView android:id="@+id/foo" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toRightOf

Android convertView, to use it or not?

老子叫甜甜 提交于 2019-12-04 10:02:05
In the article Multithreading For Performance from Android Developer Blog, convertView is used in Adapter.getItem() to display a list of ImageView , which are downloaded through HttpRequest.Yet, I also see some Android tutorials that don't use the convertView , and just inflate a new view in Adapter.getItem() . I'm wondering what's the advantage of using convertView ? How does it recycle the used view? Where are the used view cached? I ask this question because I didn't use convertView in my project and I want to know the cost for not using it. Below is my implementation of a listView of

simple cursor adapter requires minimum api 11 issue

假装没事ソ 提交于 2019-12-04 09:56:19
I am working on a app , in which i require to populate list view from the database. I am getting compatibility issue in following code dataAdapter = new SimpleCursorAdapter( this, R.layout.eventlisting, cursor, columns, to, 0); It requires min api level 11 , mine is 8. Is there any alternative for this to make this code work on api 8 as well. Can i use support library? Try the SimpleCursorAdapter from the support class . It is used like the API 11+ version and it is already backwards compatible. You have to download the Support Library , so you only need to change the import Like This way :

How to make divider part of each item in listview in android?

夙愿已清 提交于 2019-12-04 09:52:21
I wanted to change the divider height dynamically. From whatever I have searched it seems that it is possible through setting divider as part of each item in ListView . But I am not very clear with this. So, can someone be more specific as how can one make the divider as part of item in ListView ? A way to do this would be to include the divider at the bottom of each row. Now you have to set the height of the divider view in your getView method in your listadapter depending of the item you are showing at the moment. Nothing is better than explaining by picture. Here I found a screenshot from

using onScroll in android listview

无人久伴 提交于 2019-12-04 09:22:09
Friends I am using listview and loading contents on scroll when it reaches at the end. But I am facing error like the same url is called more than once if if scrolled fastly can anybody help me to resolve this. I have gone thro SCROLL_STATE_IDLE but don't know how to implement the same in my code. Also even when am not touching screen its running. I now want to know how to stop the code on Idle state.Attaching my code below int start = 0; int limit = 3; loadingMore = false; listView.setOnScrollListener(new OnScrollListener() { @Override public void onScrollStateChanged(AbsListView view, int

Explanation of the getView() method of an ArrayAdapter

一笑奈何 提交于 2019-12-04 08:56:47
问题 Could you explain the getView() method of an ArrayAdapter . I read the docs and it has three parameters: position : The position of the item within the adapter's data set of the item whose view we want. convertView : The old view to reuse, if possible. Note: You should check that this view is non-null and of an appropriate type before using. If it is not possible to convert this view to display the correct data, this method can create a new view. Heterogeneous lists can specify their number

How to fix notifyDataSetChanged/ListView problems in dynamic Adapter wrapper Android

时光毁灭记忆、已成空白 提交于 2019-12-04 08:09:15
Summary: Trying to dynamically add heading rows to a ListView via a custom adapter wrapper. ListView is having trouble keeping the scroll position in sync. Runnable demo project provided. I would like to dynamically add items to a list based on the values in a CursorAdapter, several positions ahead of what the user is currently viewing. To do this, I have an adapter that wraps the CursorAdapter and keeps the new content indexed in a SparseArray. The ListView needs to be updated when items are added to the custom adapter, but I have met a lot of pitfalls trying to get that to work and would

Is there a way to share a same LayoutManager between multiple nested RecyclerViews

旧巷老猫 提交于 2019-12-04 08:01:14
I'm developing an application that showing a game list, inside every game's itemView, i also have a video list to be showing. preview and structure are following. I deploy a RecyclerView as the window root view, and then for the videos, i used grid-style RecyclerView to display, so here we got a nested RecyclerView structure. But there is trouble because the number of videos is inconsistent between games, i don't want the RecyclerView of video list able to being scroll, so the best way is make the View's height stretch dynamically depends on how much rows it have. I heard a disappointing

android ListView : scrollTo doesn't work

若如初见. 提交于 2019-12-04 07:58:56
I have a view that contains a ListView which is binded to a cursor adapter. When The cursor content change I want to keep the ListView at the top then in my custom cursor adapter I added : @Override protected void onContentChanged() { // ... myListView.scrollTo(0, 0); } but this doesn't work. Then I read somewhere to queue this action like this : myListView.post(new Runnable() { public void run() { myListView.scrollTo(0, 0); } }); but this doesn't work either. How can I keep the ListView at the top when its content changes? EDIT: Just for try, I added a button and called scrollTo() in its

Set onItemClick to Custom adapter ListView

|▌冷眼眸甩不掉的悲伤 提交于 2019-12-04 07:54:48
When I had problems trying to fix the position of my listView items to the desired intent when filtered, and got info I could override the problem using a custom adapter, I have done that but I do not know how to assign the clicks to each items, please check below code: public class IndexPageActivity extends Activity { ListView listView; EditText editTextB; @Override protected void onCreate(Bundle savfedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.indexpage); listView = (ListView) findViewById(R.id.pageList); editTextB =