我有一个列表视图，其中列表项的背景在通知到达时突出显示，但问题是当我滚动列表时，项目会更改突出显示。假设当我向下滚动然后另一个项目突出显示时，最初列出了第一个项目。我也使用了notifysetdatachanged。
列表活动代码
public class NewPageActivity extends Fragment{
//当通知到达时，这是我的通知代码
@Override
public void onResume() {
super.onResume();
IntentFilter intentFilter = new IntentFilter(
"unique_name");
mMessageReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
//extract our message from intent
String msg_for_me = intent.getStringExtra("message");
//log our message value
Log.e("TAG", "onReceive: boradcast" + msg_for_me);
if (msg_for_me.contains("&")) {
String msg1[] = msg_for_me.split("&");
if (msg1[0].contains("Waiting for acceptance...")) {
edit.putInt("newTabHighlight", sp.getInt("newTabHighlight", 0) + 1);
edit.putString("newOrder", sp.getString("newOrder", null) + "&" + msg1[1].split("=")[1]);
edit.putInt("reminderTab", sp.getInt("reminderTab", 0) + 1);
edit.putInt("newOrderCount", 1);
edit.commit();
connectToDatabase();
}
}
//通过Web服务获取数据并设置适配器的代码
if(getActivity()!= null) {
adapter = new customadapetr_new(dataModels, getActivity(), NewPageActivity.this);
list.setAdapter(adapter);
adapter.notifyDataSetChanged();
setListViewHeightBasedOnChildren(list);
}
}
//背景突出显示的适配器代码
private void setNewCardBackground(final String Order_id, final RelativeLayout MenuCard, String OrderFlag)
{
Log.e("TAG", "setNewCardBackground: " );
newOrder = sp.getString("newOrder", "null");
if (newOrder.contains("&")) {
newOrderArray = newOrder.split("&");
Log.e("TAG", "setNewCardBackground:order "+newOrderArray);
for (int i = 0; i < newOrderArray.length; i++) {
if (Order_id.equals(newOrderArray[i])) {
MenuCard.setBackgroundResource(R.drawable.highlightedorder);
MenuCard.setPadding(20,10,20,10);
newOrderlength++;
break;
}
//自定义适配器获取视图代码
@Override
public View getView(final int position, View vv, ViewGroup parent) {
menuModels= new ArrayList<>();
final ViewHolder viewHolder; // view lookup cache stored in tag
final View result;
final DataModel data=dataSet.get(position);
if (vv == null) {
viewHolder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(mContext);
vv = inflater.inflate(R.layout.adapter_listview_newpage_card, parent, false);
viewHolder.rupee=(TextView)vv.findViewById(R.id.rupee);
viewHolder.dateandtime=(TextView)vv.findViewById(R.id.dateandtime);
viewHolder.modeofpayment=(TextView)vv.findViewById(R.id.modeofpayment);
viewHolder.location=(TextView)vv.findViewById(R.id.location);
viewHolder.customerName=(TextView)vv.findViewById(R.id.customerName);
viewHolder.orderId = (TextView)vv.findViewById(R.id.orderId);
viewHolder.order_time = (TextView) vv.findViewById(R.id.order_time);
viewHolder.menucard = (RelativeLayout) vv.findViewById(R.id.menucard);
viewHolder.accept = (ImageView) vv.findViewById(R.id.accept);
viewHolder.statustext = (TextView)vv.findViewById(R.id.statustext);
viewHolder.orderstatus = (TextView) vv.findViewById(R.id.orderstatus);
viewHolder.order_card_layout =(RelativeLayout) vv.findViewById(R.id.order_card_layout);
viewHolder.progressBar = (PlayGifView) vv.findViewById(R.id.progressBar);
viewHolder.progressBar.setImageResource(R.drawable.renewedloader);
viewHolder.showhide =(ImageView) vv.findViewById(R.id.showhide);
viewHolder.comments = (TextView) vv.findViewById(R.id.comments);
viewHolder.expanded_menulist =(ListView) vv.findViewById(R.id.menulist1);
viewHolder.expanded_menulist.setVisibility(View.GONE);
DisplayMetrics metrics = new DisplayMetrics();
WindowManager windowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
windowManager.getDefaultDisplay().getMetrics(metrics);
height = metrics.heightPixels;
width = metrics.widthPixels;
sp =mContext.getSharedPreferences("afewtaps", Context.MODE_PRIVATE);
face = Typeface.createFromAsset(mContext.getAssets(), "fonts/Nunito-Regular.ttf");
face1 = Typeface.createFromAsset(mContext.getAssets(), "fonts/Rupee_Foradian_2.ttf");
int size = dataSet.size();
String menu=data.getMenu();
viewHolder.listview=(ListView)vv.findViewById(R.id.menulist);
setListViewHeightBasedOnChildren(viewHolder.listview);
String paynt = data.getPaymemt_method();
final String order_id = data.getOrder_id();
final String Order_flag = data.getOrder_flag();
setNewCardBackground(order_id, viewHolder.menucard,Order_flag );
String orderEscalation = data.getOrder_escalated();
setEscalation(viewHolder.statustext, viewHolder.accept, viewHolder.orderstatus, order_id, orderEscalation);
int time = Integer.parseInt(data.getTimer_time());
setTime(time, viewHolder.order_time);
// menucard item
comment_value = data.getOrder_comments();
viewHolder.accept.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
removeListItem(viewHolder.order_card_layout, position);
objNewPageActivity.SendOrder(data.getOrder_id());
}
});
viewHolder.customerName.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getCustomerProfile(order_id, mContext);
}
});
try {
JSONArray jsonArray1 = new JSONArray(menu);
String orderMenu[][] = new String[jsonArray1.length()][4];
int j;
for (j = 0; j < jsonArray1.length(); j++) {
menumodel = new MenuItemModel();
JSONObject ob2 = jsonArray1.getJSONObject(j);
// String menu_name, menu_qty, menu_price;
String menu_veg_type = ob2.getString("type");
menumodel.setMenuitem_type(menu_veg_type);
String menu_name = ob2.getString("item");
menumodel.setMenuitem_name(menu_name);
String menu_qty = ob2.getString("qty");
menumodel.setMenuitem_qty(menu_qty);
String menu_price = ob2.getString("price");
menumodel.setMenuitem_price(menu_price);
menuModels.add(menumodel);
}
viewHolder.listview.setAdapter(new MyAdapter(mContext,menuModels));
setListViewHeightBasedOnChildren(viewHolder.listview);
viewHolder.expanded_menulist.setAdapter(new Expanded_Menu_Adapter(mContext,menuModels));
//setListViewHeightBasedOnChildren(viewHolder.expanded_menulist);
}catch (Exception e)
{
}
int menuArrayLenghth = menuModels.size();
if(menuArrayLenghth > 2)
{
viewHolder.showhide.setVisibility(View.VISIBLE);
}
else
{
viewHolder.showhide.setVisibility(View.GONE);
}
result=vv;
vv.setTag(viewHolder);
}
else {
viewHolder = (ViewHolder) vv.getTag();
result=vv;
}
lastPosition = position;
viewHolder.dateandtime.setText(data.getOrder_time());
viewHolder.modeofpayment.setText(data.getPaymemt_method());
viewHolder.location.setText(data.getCustomer_location());
// amount
String amounttext = "` " + data.getPrice();
SpannableStringBuilder mySpannable = new SpannableStringBuilder(amounttext);
mySpannable.setSpan(new CustomTypefaceSpan("", face1), 0, 1, Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
mySpannable.setSpan(new CustomTypefaceSpan("", face), 2, data.getPrice().length(), Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
viewHolder.rupee.setText(mySpannable);
viewHolder.customerName.setText(data.getCustomer_name());
viewHolder.orderId.setText(data.getOrder_id());
if(!(comment_value.equals("0"))){
viewHolder.comments.setVisibility(View.VISIBLE);
viewHolder.comments.setText(data.getOrder_comments());
}
else
{
viewHolder.comments.setVisibility(View.GONE);
}
viewHolder.showhide.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(viewHolder.listview.getVisibility() == View.VISIBLE)
{
viewHolder.expanded_menulist.setVisibility(View.VISIBLE);
viewHolder.listview.setVisibility(View.GONE);
viewHolder.showhide.setImageResource(R.drawable.blackarrrowup);
if(!(comment_value.equals("0"))){
viewHolder.comments.setVisibility(View.VISIBLE);
viewHolder.comments.setText(data.getOrder_comments());
}
else
{
viewHolder.comments.setVisibility(View.GONE);
}
}
else if(viewHolder.expanded_menulist.getVisibility() == View.VISIBLE) {
viewHolder.expanded_menulist.setVisibility(View.GONE);
viewHolder.listview.setVisibility(View.VISIBLE);
viewHolder.showhide.setImageResource(R.drawable.blackarrow);
viewHolder.comments.setVisibility(View.GONE);
}
}
});
return vv;
}
答案 0 :(得分：0)
问题可能是由Views回复Adapter引起的：当您向下/向上滚动时，突出显示的View会被回收并在ListView的其他位置使用}。您可以将每个View的背景颜色设置为适配器getView中的默认颜色。这样，回收的View的背景颜色将在再次显示之前设置为恢复正常。