adapter

ListView getView() called too often

由 ╄→гoц情女王★ 提交于 2019-12-10 17:33:09
问题 I have a ListView with custom Adapter . To be honest, I have many of them at the same time on screen, and my Tegra 3 device started to lag, what made me really confused... I found than in each ListView 's Adapter the getView() method is called for all visible rows every time any animations runs on screen. That gives me like few hundreds of calls per second! Digging more, most of these calls are due to measure() and onMeasure() calls of ListView s' parents, and - this is tke key - they are

Filtering Realm object in android

由 萝らか妹 提交于 2019-12-10 17:16:16
问题 So i've started to use Realm and everything works fine, well almost everything. I'm using a MultiAutoCompleteTextView to select some user (RealmObject) so here goes: this is my Filter( inner class of my adapter) private class UserFilter extends Filter { @Override protected FilterResults performFiltering(CharSequence constraint) { FilterResults filterResults = new FilterResults(); if (constraint == null || constraint.length() == 0) { filterResults.values = mUsers; filterResults.count = mUsers

ListView item deletion changes item heights

由 五迷三道 提交于 2019-12-10 17:06:41
问题 I have a ListView whose items can be deleted by swiping them. When an item is swiped, its database row gets deleted, as well as its object in the adapter's data set, and notifyDataSetChanged() is called as well. The problem is, these items have varying heights - one can be a one-liner, the second can have four lines. So when I have some items on the list, let's say: 1.One line 2.Two lines 3.Three lines 4.One line And the second one is deleted, the third one goes in its place (as expected),

What design pattern would this be, and is it a good idea? (C#)

由 六月ゝ 毕业季﹏ 提交于 2019-12-10 17:02:22
问题 I've got a class that I want to extend functionality to in a decorator/adapter kind of a way, only I don't want my extending class to have to know anything about the kinds of classes it is extending, and I don't want to have to write a new class for each type of object I want to extend. All objects I would want to extend off of, though, share a common base class, Team . This sounds ripe for a use of generics, so here was my initial idea: public class TournamentTeam<T> : T where T : Team {

ViewHolder模式超简洁写法，很cool!

由 社会主义新天地 提交于 2019-12-10 16:37:30
ViewHolder是什么就不解释了。大家通常怎么写ViewHolder呢？ ViewHolder holder = null; if(convertView == null) { convertView = mInflater.inflate(R.layout.xxx null); holder = new ViewHolder(); holder.tvXXX = (TextView)findViewById(R.id.xxx); //...一连串的findViewById } else { holder = (ViewHolder) convertView.getTag(); } private static class ViewHolder{ TextView tvXXX; //很多view的定义 } 这么写一次还行，但问题是总有很多很多的ViewAdapter要这么写，每次都repeat,repeat,repeat 累啊。所以，有这么一种简洁的写法分享给大家，先声明，从国外网站上看的，不是自己原创的，但确实很喜欢这个简洁的设计。 ViewHolder这么写（只提供一个静态方法，其实可以加一个私有构造函数防止外部实例化），代码很简单，看过就明白了 public class ViewHolder { // I added a generic return type to

How can a java application running on windows 7 choose which network adapter to use

由 走远了吗. 提交于 2019-12-10 15:28:47
问题 Hi I am writing an application for a device -- tablet -- running windows 7. The application is being written in java. The application needs to be aware of which networking adapter is available (WIFI, 3G, etc ...) Is there a java library similar to the one developed for android -- android.net, android.net.wifi, etc ... -- In brief, How can a java application running on windows 7 choose which network adapter to use ? Thank you! 回答1: You can see which Network Interfaces are available using java

AIX 系统收集信息

由 人盡茶涼 提交于 2019-12-10 13:03:39
1.uname -uM //查看机器序列号 [P55A#/]uname -uM IBM,9133-55A IBM,03064E69H 2.oslevel -s //查看操作系统版本 [P55A#/]oslevel -s 6100-07-04-1216 3.查看CPU信息： lsdev -C|grep proc //查看cpu信息，可以查看CPU个数 [P55A#/]lsdev -C|grep proc proc0 Available 00-00 Processor 4.bootinfo -r //查看内存信息 [P55A#/]bootinfo -r 12124160 //以KB为单位 prtconf -m //查看内存信息，系统总配置内存 [P55A#/]prtconf -m Memory Size: 11840 MB lsdev -Cc memory //查看物理内存配置情况 [P55A#/]lsdev -Cc memory L2cache0 Available L2 Cache mem0 Available Memory lsattr -El mem0 //查看内存信息，可以查看到总安装内存以及可使用内存 [P55A#/]lsattr -El mem0 ent_mem_cap I/O memory entitlement in Kbytes False goodsize

Change listview adapter to recycler view adapter

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-10 12:35:27
问题 When I load images from SD card to ListView, it starts lagging. I can not scroll smoothly. So, I decided to use recycler view and maybe Picasso. The only problem I am facing is that, ListView adapter is not working with RecyclerView. How can I rewrite the following code/adapter to work with RecyclerView? All the best and Happy New Year! public class Saveditems extends BaseActivity { ArrayList<String> f = new ArrayList<>();// list of file paths File[] listFile; @Override public void onCreate

Universal Image Loader - call too many getView()

由 十年热恋 提交于 2019-12-10 12:19:41
问题 I'm trying to create a image ListView using universal-image-loader. Currently, no images appear or load. I found that getView() from ImageAdapter was called to many times. For example, if list size is 3, then getView() should call 3 times but in my code, call 24 times!!! This is my Source Code. public class MainActivity extends Activity{ AsyncTask<Void, Void, Void> asyncTask, registerTask; DisplayImageOptions options; ArrayList<HashMap<String, Object>> feedList = null; @Override public void

RadioButton Android, selected the same value in other row

由 偶尔善良 提交于 2019-12-10 11:48:11
问题 I have a listview, each row with 3 radiobuttons. In tests I have 7 rows, I display them properly, but when I select one row in one raddioButton, also selected in row 6. Do not know why this happening. I do not understand. I hope you can help me, I leave the code. Thanks in advance. my Adapter @Override public View getView(final int position, View convertView, ViewGroup parent) { View rowView = convertView; if (rowView == null) { LayoutInflater inflater = context.getLayoutInflater(); rowView =
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