BaseAdapter as the name suggests, is a base class for all the adapters. When you are extending the Base adapter class you need to implement all the methods like getCount(), getId() etc. ArrayAdapter is a class which can work with array of data. You need to override only getview() method. ListAdapter is a an interface … Read more
As Romain Guy explained a while back during the Google I/O session, the most efficient way to only update one view in a list view is something like the following (this one update the whole View data): ListView list = getListView(); int start = list.getFirstVisiblePosition(); for(int i=start, j=list.getLastVisiblePosition();i<=j;i++) if(target==list.getItemAtPosition(i)){ View view = list.getChildAt(i-start); list.getAdapter().getView(i, view, … Read more
getView() is the main part of your adapter. It returns View that will be displayed as your list/grid/gallary/any view that use adapter item. It triggers when you scroll the view(list for example). So the first thing you should do its to create your custom adapter. You may extend it from BaseAdapter. Then you need to … Read more
You are having problem, mainly because you are using custom object. If you pass a String or int value to array adapter its know how to filter it. But if you pass custom object default filter implementation have to no idea how to deal with that. Although it is not clear what you are trying … Read more
I was having similar issues, but when clicking an item in the custom list, the items on the screen would reverse in sequence. If I clicked again, they’d reverse back to where they were originally. After reading this, I checked my code where I overload the getView method. I was getting the view from the … Read more
This fixed my problem. I’m not certain it’s the best solution, but it works. My project’s open-source, so feel free to use any of the code here should it prove usefull :-). package me.alxandr.android.mymir.adapters; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.HashMap; import java.util.Iterator; import java.util.Set; import me.alxandr.android.mymir.R; import me.alxandr.android.mymir.model.Manga; import android.content.Context; import android.util.Log; import … Read more
you can also do like this.. moreListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub Log.d(“############”,”Items ” + MoreItems[arg2] ); } });
android:textAppearance=”?android:attr/textAppearanceLarge” seemed no effect. android:minHeight=”?android:attr/listPreferredItemHeight” changed the height for me
Understand how listview recycling works How ListView’s recycling mechanism works You cannot recycle a row that is presently in use. The above link explains how listview recycling mechanism works So What is the benefit of using ViewHolder? Quoting docs Your code might call findViewById() frequently during the scrolling of ListView, which can slow down performance. … Read more
You probably want to tell the ListView to post the scroll when the UI thread can handle it (which is why yours it not scrolling properly). SmoothScroll needs to do a lot of work, as opposed to just go to a position ignoring velocity/time/etc. (required for an “animation”). Therefore you should do something like: getListView().post(new … Read more