Highlight the selected item in Horizontal List vie

问题:

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
}
});

回答1:

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);

回答2:

you can achieve this in two ways.

1. manually clear all item and set selected in onItemClick()

   listview.setOnItemClickListener(new OnItemClickListener() {
   
       @Override
       public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
               long arg3) {
   
           for (int i = 0; i < adapter.getCount(); i++) {
           View item = listview.getChildAt(i);
           if (item != null) {
               item.setBackgroundResource(R.drawable.unselected);
           }
           arg1.setBackgroundResource(R.drawable.selected);
       }
   
       }
   });
   

2. use selector and let listview do itself.

/drawable/selector_list.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

   <item android:drawable="@drawable/selected" android:state_selected="true"/>
   <item android:drawable="@drawable/selected" android:state_activated="true"/>
   <item android:drawable="@drawable/unselected"/>

</selector>

and add android:listSelector="@drawable/selector_list" to your listview

回答3:

add listitemclick.xml in your drawblw folder this is the code. 2)then in your hlist_rowitem.xml set background="@drawable/listitemclick"

回答4:

follow these steps: 1)declare one boolean array. public static boolean ClickItem[]; 2)inside oncreate ClickItem=new boolean[your array size]; Arrays.fill(ClickItem, false);

in your adapter write this code a)
if ClickItem[pos] { v.setBackgroundColor(Color.parseColor("#abcdef")); }else

a) v.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

        Arrays.fill(ClickItem, false);
            ClickItem[pos]=true;

            adapter1.notifyDataSetChanged();


        }
    });