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技術社區[雲棲]
Android中ListView包含CheckBox時滑動丟失選中狀態的解決
現象：listview 中，如果有10項，其中手機屏幕顯示1-6項，其餘的7-10項在屏幕中不可見，得向下滾動後才能看到，這個時候，如果選中1、2項，再滾動到7-10項，之後再滾動回來1-6項，就發現1、2項並未被選中。
解決方法: 編寫自定義的Adapter
public class TestAdapter extends ArrayAdapter<String> {
private int resource;
private LayoutInflater inflater;
private boolean[] checks; //用於保存checkBox的選擇狀態
public TestAdapter(Context context, int resource, List<String> list) {
super(context, resource, list);
checks = new boolean[list.size()];
this.resource = resource;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if(convertView == null){
convertView = inflater.inflate(resource, null);
holder = new ViewHolder();
holder.title = (TextView) convertView.findViewById(R.id.title);
holder.checkBox = (CheckBox) convertView.findViewById(R.id.checkBox);
convertView.setTag(holder);
}else {
holder = (ViewHolder) convertView.getTag();
}
holder.title.setText(getItem(position));
final int pos = position; //pos必須聲明為final
holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
@Override
public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
checks[pos] = isChecked;
}});
holder.checkBox.setChecked(checks[pos]);
return convertView;
}
static class ViewHolder {
TextView title;
CheckBox checkBox;
}
}
最後更新：2017-04-03 12:55:01