本例中 getView (int position, View convertView, ViewGroup parent) 中的 convertView 是如何变化的

Question

能否请您为我解释一下 convertView 在此示例中将如何更改：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
// If we weren't given a view, inflate one
  if (convertView == null) {
    convertView = getActivity().getLayoutInflater().inflate(R.layout.list_item_crime, null);
  }
  // Configure the view for this Crime
  Crime c = getItem(position);
  TextView titleTextView =
    (TextView)convertView.findViewById(R.id.crime_list_item_titleTextView);
  titleTextView.setText(c.getTitle());
  TextView dateTextView =
    (TextView)convertView.findViewById(R.id.crime_list_item_dateTextView);
  dateTextView.setText(c.getDate().toString());
  CheckBox solvedCheckBox =
    (CheckBox)convertView.findViewById(R.id.crime_list_item_solvedCheckBox);
  solvedCheckBox.setChecked(c.isSolved());
  return convertView;
}

我想知道 titleTextView & dataTextView & solvedCheckBox 对 convertView 的影响？？？或者在方法末尾返回的 convertView 与 convertView = getActivity().getLayoutInflater().inflate(R.layout.list_item_crime, null); 相同，并且 titleTextView & dataTextView & solvedCheckBox 不会更改 [=11 中的任何内容=]???

Answer 1

 if (convertView == null) {
convertView = getActivity().getLayoutInflater().inflate(R.layout.list_item_crime, null);

}

这是convertView的初始化你只需要第一次做然后第二次就不需要而且titleTextView & dataTextView & solvedCheckBox不影响convertView

本例中 getView (int position, View convertView, ViewGroup parent) 中的 convertView 是如何变化的

how convertView change in getView (int position, View convertView, ViewGroup parent) in this example

android

android-adapter