why there are duplicated views in listview

list view will automately reuse it's item child views, you should update child views' content in getView() function.

if you use ViewHolder, don't forget to setTag() before getTag();

ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = LayoutInflater.from(getActivity()).inflate(R.layout.item_bound_car, parent, false);
ViewHolder.bind(holder, convertView);
holder.unbind.setOnClickListener(onClick);
convertView.setOnClickListener(onClick);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
try {
BoundCar car = cars.get(position);
if (car != null) {
Log.e(DrvStoContext.TAG, "bound car item: " + car.carid + " " + car.carTypeDesc + " " + car.violationTimes + " " + car.licenseCode + " " + car.carTypeNum + " " + car.deduction + " " + car.penalty);
holder.unbind.setTag(R.id.bound_car_tag, car);
convertView.setTag(R.id.bound_car_tag, car);
holder.licenseCode.setText(car.licenseCode);
holder.violation.setText(car.getViolationTimesStr());
holder.penalty.setText(car.getPenaltyStr());
holder.deduction.setText(car.getDeductionStr());
Log.e(DrvStoContext.TAG, "set view display success");
}
} catch (Exception e) {
Log.e(DrvStoContext.TAG, e.getMessage() ==
3ff0
null ? "NULL pointer" : e.getMessage());
}