我正在尝试创建一个列表视图,在点击项目后,背景会改变颜色。到目前为止,我当前的实现导致“相反”的可见单元格的背景发生了变化。例如,如果我选择列表中的顶部项目,则会突出显示底部项目。任何人都可以帮我实现所需的功能吗?
我的列表活动:
public void onCreate(Bundle savedInstanceState) {
Log.e(TAG, "Starting Symptom Activity...");
super.onCreate(savedInstanceState);
setContentView(R.layout.symptom_listview);
// Setup list
this.setupSymptomScreen();
startManagingCursor(cs);
//get handle on buttons
Button nextButton = (Button) findViewById(R.id.symptom_next);
Button backButton = (Button) findViewById(R.id.symptom_goBack);
ListView lv =getListView();
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lv.setItemsCanFocus(false);
SymptomAdapter adapter = new SymptomAdapter(this,
R.layout.symptom_item, cs, new String[] { DbAdapter.KEY_SYMPTOM },
new int[] { R.id.txt_symptom });
selectedItems = new HashSet<String>();
adapter.setLookupTable(selectedItems);
setListAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
if(!selectedItems.contains(view.toString()))
{
view.setBackgroundColor(Color.CYAN);
String symptom = ((TextView) view.findViewById(R.id.txt_symptom)).getText().toString();
selectedItems.add(symptom);
}
else
{
view.setBackgroundColor(Color.WHITE);
selectedItems.remove(view.toString());
}
}
});
nextButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// import selected items into a list
importSelected();
// figure out category
process();
}
});
//List for symptom ids
symptoms_id = new ArrayList<Integer>(cs.getCount());
}
我也制作了自己的适配器,我已经覆盖了getView
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView != null){
String symptoms = ((TextView) convertView.findViewById(R.id.txt_symptom)).getText().toString();
if(!selectedItems.contains(symptoms))
convertView.setBackgroundColor(Color.WHITE);
}
return super.getView(position, convertView, parent);
}
答案 0 :(得分:5)
以下是一个例子:
private class ItemAdapter extends SimpleAdapter {
private int mItemIndex = -1;
public ItemAdapter(Context context,
List<? extends Map<String, ?>> data, int resource,
String[] from, int[] to) {
super(context, data, resource, from, to);
// TODO Auto-generated constructor stub
}
/* (non-Javadoc)
* @see android.widget.SimpleAdapter#getView(int, android.view.View, android.view.ViewGroup)
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View view = super.getView(position, convertView, parent);
if (position == mItemIndex) {
convertView.setSelected(true);
convertView.setPressed(true);
convertView.setBackgroundColor(Color.parseColor("#FF9912"));
}
return view;
}
public void setSelectItem(int index) {
mItemIndex = index;
}
public int getSelectItem() {
return mItemIndex;
}
}
选择项目时,onItemClick
功能如下:
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
((ItemAdapter)list.getAdapter()).setSelectItem(arg2);
}