高亮显示水平列表视图中选择的项目 [英] Highlight the selected item in Horizontal List view

问题描述

在默认情况下，我需要显示一个项目所强调的水平列表视图，并在用户中我想强调该项目的水平列表视图中选择另一个项目（除去较早，并强调当前选定的），对于我正在用下面的code试图在我的适配器

适配器： -

  INT的selectedIndex;
 @覆盖
 公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
   视图V = convertView;
   V = LayoutInflater.from（parent.getContext（））。膨胀（
        R.layout.hlist_rowitem，NULL）;  如果（位置==的selectedIndex）{
    v.setBackgroundColor（Color.parseColor（＃ABCDEF））;
 }
}
 

和从列表视图做什么，在做活动来改变突出了项目的位置与活动选择在另一个项目之后。

活动： -

  INT SINDEX;
。SINDEX = getIntent（）getIntExtra（位置，0）;
hlAdapter =新HSelectedAdapter（InsuranceCard.this，rowItems，SINDEX）;
hListView.setAdapter（hlAdapter）;
hListView.setOnItemClickListener（新OnItemClickListener（）{
@覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，INT位置，长的id）{
 //其他code到这里
}
}）;
 

解决方案

我会使用的颜色状态列表资源并有ListView的处理与选择的 setSelection（位置）。

颜色列表中会是这个样子：

 ＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT;选择的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android＆GT;
    ＆LT;项目的android：STATE_ pressed =真
          机器人：颜色=＃为aabbcc/＆GT; ＆LT;！ -  pressed  - ＆GT;
    ＆LT;项目的android：state_activated =真
          机器人：颜色=＃FEDCBA/＆GT; ＆LT;！ - 选择 - ＆GT;
    ＆LT;项目的android：颜色=＃ABCDEF/＆GT; ＆LT;！ - 默认 - ＆GT;
＆LT; /选择＆GT;
 

和它应该被设置为在列表视图的 R.layout.hlist_rowitem 或 listSelector 背景。

编辑：
要接收click事件时更改的选择：

  hListView.setOnItemClickListener（新OnItemClickListener（）{
    @覆盖
    公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，INT位置，长的id）{
        hListView.setSelection（位置）;
    }
}）;
 

ListView控件将取消旧的/默认项，并在指定位置选择新项目。

编辑2：默认情况下在ListView没有选择的模式设置，以便确保你将它设置在XML或code： listView.setChoiceMode（ListView.CHOICE_MODE_SINGLE）;

By default i need to show one item as highlighted in horizontal list view and when the user selected another item in the horizontal list view i want to highlight that item(removing the earlier and highlight the currently selected) for that i'm trying with the following code,in my adapter

Adapter:-

 int selectedIndex;
 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
   View v = convertView;
   v = LayoutInflater.from(parent.getContext()).inflate(
        R.layout.hlist_rowitem, null);

  if (position == selectedIndex) {
    v.setBackgroundColor(Color.parseColor("#abcdef"));
 }
}

and after selecting another item from activity in from the list view what to do in activity to change highlighting position of the item.

Activity:-

int sIndex;
sIndex = getIntent().getIntExtra("POSITION", 0);
hlAdapter = new HSelectedAdapter(InsuranceCard.this, rowItems, sIndex);
hListView.setAdapter(hlAdapter);
hListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
 //other code goes here
}
});

解决方案

I'd would use a color state list resource and have the ListView handle the selection with setSelection(position).

The color list would look something like this:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true"
          android:color="#aabbcc"/> <!-- pressed -->
    <item android:state_activated="true"
          android:color="#fedcba"/> <!-- selected -->
    <item android:color="#abcdef"/> <!-- default -->
</selector>

and it should be set as background of the R.layout.hlist_rowitem or as listSelector on the listview.

Edit: To change the selection when receiving a click event:

hListView.setOnItemClickListener(new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
        hListView.setSelection(position);
    }
});

The ListView will deselect the old/default item and selects the new item at the specified position.

Edit 2: By default the ListView don't have a choice mode set so make sure you either set it in xml or in code: listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

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