adapter

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I created a database using SQL developer list of 1000 entries and it created successfully. The connection also succeeded. But today while I'm trying to connect there is an error occurring: IO Error: The Network Adapter could not establish the connection in SQL developer I can surely say it is not connecting I tried it in Command prompt also in prompt it is mentioning as Protocol Adapter Error. What is the problem here? What is meant by Protocol Adapter Error how can i overcome it? What is Network Adapter Error? 回答1: Please check the listener

Android――Adapter 基本概念 Adapter Android Adapter UI 常用Adapter ListAdapter SpinnerAdapter ListAdapter 为 AbsListView SpinnerAdapter 为 AbsSpinner Adapter BaseAdapter ArrayAdapter SimpleAdapter SimpleCursorAdapter Adapter BaseAdapter Adapter ArrayAdapter<T> (T) BaseAdapter Adapter ListView( ListAdapter ) Spinner( SpinnerAdapter ) CursorAdapter Cursor ListView HeaderViewListAdapter ListView Header ListView ListAdapter Adapter ListViewts_ ResourceCursorAdapter XML views SimpleAdapter XML view SimpleCursorAdapter cursor XML TextView ImageView SpinnerAdapter Adapter Spinnerts_ WrapperListAdapter Adapter

当我们使用RecylerView时，需要绑定一个Adapter和LayoutManager，而vlayout里定义了 VirtualLayoutAdapter (继承自Adapter)和 VirtualLayoutManager (继承自LayoutManager)来绑定到RecyclerView。 VirtualLayoutAdapter 它是一个抽象类，很简单： public abstract class VirtualLayoutAdapter < VH extends RecyclerView . ViewHolder > extends RecyclerView . Adapter < VH > { @NonNull protected VirtualLayoutManager mLayoutManager; public VirtualLayoutAdapter(@NonNull VirtualLayoutManager layoutManager) { this .mLayoutManager = layoutManager; } // 设置整个页面一系列的LayoutHelper public void setLayoutHelpers(List<LayoutHelper> helpers) { this .mLayoutManager

获取蓝牙适配器BluetoothAdpater BluetoothAdapter adapter = BluetoothAdapter. getDefaultAdapter () ; BluetoothAdapter adapter = (BluetoothAdapter) getApplicationContext().getSystemService( BLUETOOTH_SERVICE ) ; 安卓6以后的版本使用此方法拿不到真实的MAC地址 String macAddr = adapter.getAddress() ; 需要采用以下镜像来获取 Object bluetoothManageService = new Mirror().on(adapter).get().field( "mService" ) ; if (bluetoothManageService == null ) return null; Object address = new Mirror().on(bluetoothManageService).invoke().method( "getAddress" ).withoutArgs() ; if (address != null && address instanceof String) { return (String) address ; }

前言 最近在使用eclipse开发的时候遇到如题的报错，分享一下解决办法。场景是在svn上下了一个新的项目，在启动时不能连接远程oracle数据库，但这个oracle数据库使用plsql是可以连接的，而且通过测试发现使用eclipse连接本地数据库也是可以的。 解决办法 在网上搜索到的解决办法都是关于数据库监听配置的，而且也不能解决我遇到的问题，最后发现eclipse有时在联网时会将ipv4转换为ipv6使用，导致报错：The Network Adapter could not establish the connection。 -Djava.net.preferIPv4Stack=true 文章来源: eclipse报错：The Network Adapter could not establish the connection解决办法

问题：在ListView中Item是个RadioGroup，在Adapter中动态添加RadioButton，并通过setChecked为RadioButton设置选中和未选中的状态，中间会通过Adapter的notifyDataSetChanged方法改变数据源的方法，改变RadioButton的状态，中间就出现了点击RadioButton无效的状态，其实OnCheckedChangeListener已经收到监听，并且为checked = true，但是RadioButton的状态是未选中的状态。 问题原因：原来是多次调用 setChecked(false)出的问题，多次调用后就会导致下次点击不会变为选中状态。 解决问题：如果是把所有的选项都设为false，可以调用RadioButton的clearCheck()方法， 文章来源: RadioButton的setChecked(true)无效或者是点击状态不改变

解决措施： recyclerview设置setItemAnimation(null) rvEpgSchList.setItemAnimator( null ); adapter设置setHasStableIds(true) epgSchListAdapter.setHasStableIds( true ); adapter中getItemId()返回position @Override public long getItemId ( int position) { return position; } RcyclerviewA的每个item嵌套recyclerviewB 解决措施： 首先要使整个recyclerview刷新时，焦点能被记住，我们需要手动保存B的当前焦点位置，即在B的adapter中onBindViewHolder方法中对B的itemview设置setOnFocusChangeListener，然后进行一些处理后，记录好B当前焦点Itme的位置 然后每次数据刷新时，B的adapter的onBindViewHolder会被调用，然后判断这时候传入的position是否跟之前存的焦点位置一致，一致的话，让itemview调用requestFocus方法就行。 但是，我们会发现，每次数据刷新时，B都会滚动到初始位置，也就是说如果B滑动了一段距离后

<?xml version="1.0" encoding="UTF-8"?> <?eclipse version="3.4"?> <plugin> <extension point="org.eclipse.ui.actionSets"> <actionSet id="com.neusoft.unieap.workshop.exportDocument.actionSet1" label="UniEAP Function Area" visible="true"> <action class="com.neusoft.unieap.workshop.exportdocument.action.ExportDesignDocumentAction" icon="icons/doc_ex.png" id="com.neusoft.unieap.workshop.exportDocument.action1" label="%PLUGIN1" style="push" toolbarPath="Normal/UniEAP" tooltip="%PLUGIN1"> </action> </actionSet> </extension> <extension point="org.eclipse.core.runtime.adapters"> <factory adaptableType=

I have created an basic app using RecyclerView and CardView from get tutorials from websites. App is working fine and i have some confusion.(I am showing my whole code here) confusion is that how code works step by step. so please clear my concept on it. Basic Structure of my App : I have create an row_data_layout xml file to bind on recycler_view . Created an Data class file(Here i defined my variable that i used in App) Created an Adapter file (here i want to clear how it goes work step by step first which class call and why ?). Bind Data to RecyclerView on MainActivity file row_data_layout

一、自定义MyAdapter public class MyAdapter extends BaseAdapter { //Adapter的作用相当于是从数据到行布局的映射。这就需要传入需要显示的List数据 List < Map < String , Object >> list ; //反射器 LayoutInflater inflater ; //初始化反射器 public MyAdapter ( Context context ) { this . inflater = LayoutInflater . from ( context ); } //通过此方法初始化List public void setList ( List < Map < String , Object >> list ) { this . list = list ; } //如果返回默认的0，不管你传入什么List，全部都不显示 //返回list.size();就刚好显示list长度对应的条数。 @Override public int getCount () { return list . size (); } //因为使用的是List，这里就是设置了如何从List的下标如何得到List中的数据 @Override public Object getItem ( int position ) {