53、listview、expandableListview如何选中时保持高亮？
一、listView被选中后保持高亮
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70down voteaccepted |
To hold the color of listview item when you press it, include the following line in your listview layout: Then define bg_key.xml in drawable folder like this: <?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_selected="true"
android:drawable="@color/pressed_color"/>
<item
android:drawable="@color/default_color" />
</selector>
Finally, include this in your listview onClickListener: listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,long arg3) {
view.setSelected(true);
...
}
}
This way, only one item will be color-selected at any time. You can define your color values in res/values/colors.xml with something like this: <?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="pressed_color">#4d90fe</color>
<color name="default_color">#ffffff</color>
</resources>
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二、expandableListview被选中后保持高亮
1、在expandableListview的adapter中的childList中的类，加一个变量，用来标记是否被选择
public class SettingTitleComponent {
public int set_for_what = 0;//设置什么
public int icon_id = 0;//图标id
public String title = "";//设置项标题
public String title_hint = "";//设置项提示
public boolean flagSelected = false;//用来记录是否被选择
}
2、在expandableListview对应的adapter中写一个方法，用来初始化所有“是否被选择”的标记位
public void initFlagSelected() {
for (int t = 0; t < childList.size(); t++) {
for (int k = 0; k < childList.get(t).size(); k++) {
childList.get(t).get(k).flagSelected = false;
}
}
}
3、在activity中设置expandableListview的回调
expLv.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
final SettingTitleComponent stc = childList.get(groupPosition).get(childPosition);
expLvAdapter.initFlagSelected();//初始化
stc.flagSelected = true//设置被选择
expLvAdapter.notifyDataSetChanged()//更新adapter对应的列表，这里很关键，请看下一步
return true; } });
4、刷新adapter时，根据标识为去判断是否应该高亮
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
final SettingTitleComponent stc = childList.get(groupPosition).get(childPosition);
CommonUtils.LogWuwei(tag, "stc title is " + stc.title + " childPosition is " + childPosition + " groupPosition is " + groupPosition);
LayoutInflater inflater = (LayoutInflater) ctxt.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View grid = inflater.inflate(R.layout.relativelayout_setting_title, null);
ImageView ivIcon = (ImageView) grid.findViewById(R.id.imageview_setting_title_icon);
TextView tvTitle = (TextView) grid.findViewById(R.id.textview_setting_title_text);
TextView tvHint = (TextView) grid.findViewById(R.id.textview_setting_title_hint);
ivIcon.setBackgroundResource(stc.icon_id);
tvTitle.setText(stc.title);
tvHint.setText(stc.title_hint);
if (stc.flagSelected) {
grid.setBackgroundColor(ctxt.getResources().getColor(R.color.Blue));
} else {
grid.setBackgroundColor(ctxt.getResources().getColor(R.color.Constrast));
}
return grid;
}
三、listview保持上次的位置
/****从这里开始记录位置信息***/ int index = listviewAllProduct.getFirstVisiblePosition(); View v = listviewAllProduct.getChildAt(0); int top = (v == null) ? 0 : (v.getTop() - listviewAllProduct.getPaddingTop()); /****记录结束***/ listviewAllProcutAdapter = new ListviewStockPlanProductAdapter(listStoreProduct, ctxt, mUiHandler); listviewAllProduct.setAdapter(listviewAllProcutAdapter); listviewAllProcutAdapter.notifyDataSetChanged(); /********恢复位置**********/ listviewAllProduct.setSelectionFromTop(index, top);
