我有列表视图[文本视图和复选框控制]与更多的数据.我将从列表视图中选择该项目,并在下一个活动中显示所选项目.
我的问题是,例如,如果我在列表视图中选择第20和第25项,它将在下一个活动中显示一些其他项目.这是列表视图位置在滚动时变化.
我的问题是,例如,如果我在列表视图中选择第20和第25项,它将在下一个活动中显示一些其他项目.这是列表视图位置在滚动时变化.
我通过点击项目上的复选框来选择一个项目.在checkBox.setOnChanged监听器中,我编写了选择或不选择位置的代码.如果我选择第25项并滚动列表视图,则调用getview方法,并且checkBox.setonChanged方法更改所选位置.我最后打印logcat.
我的编码格式：
public class ListContact extends ListActivity {
public void onCreate(Bundle icicle){
.....
ArrayAdapter<Model> adapter = new MyCustomArrayAdapter(this,getModel());
setListAdapter(adapter);
}
....
private List<Model> getModel() {
List<Model> list = new ArrayList<Model>();
Iterator<String> itr = constant.selectname.iterator();
while (itr.hasNext()) {
list.add(get(itr.next().toString()));
}
return list;
}
private Model get(String s) {
return new Model(s);
}
}
MyCustomArrayAdapter.java：
public class MyCustomArrayAdapter extends ArrayAdapter<Model> {
private final List<Model> list;
private final Activity context;
constant con ;
public MyCustomArrayAdapter(Activity context,List<Model> list) {
super(context,R.layout.list_layout,list);
this.context = context;
this.list = list;
}
static class ViewHolder {
protected TextView text;
protected CheckBox checkBox;
}
@Override
public View getView(final int position,View convertView,ViewGroup parent) {
// Log.e("getview","getview");
View view = null;
if (convertView == null) {
LayoutInflater inflator = context.getLayoutInflater();
view = inflator.inflate(R.layout.list_layout,null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.text = (TextView) view.findViewById(R.id.label);
viewHolder.checkBox = (CheckBox) view.findViewById(R.id.check);
viewHolder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
// con = new constant();
Model element = (Model) viewHolder.checkBox.getTag();
element.setSelected(buttonView.isChecked());
// Log.e("MyCustomArrayAdapter.java","selectpos array list length"+constant.selectpos.size());
if(isChecked==true){
Log.e("check Box value and position ",element.getName());
Log.e("position",""+position);
con.selectpos.set(position,1);
}
else{
Log.e("position unselect",""+position +"---------"+ element.getName());
con.selectpos.set(position,0);
}
}
});
view.setTag(viewHolder);
viewHolder.checkBox.setTag(list.get(position));
} else {
view = convertView;
((ViewHolder) view.getTag()).checkBox.setTag(list.get(position));
}
ViewHolder holder = (ViewHolder) view.getTag();
holder.text.setText(list.get(position).getName());
holder.checkBox.setChecked(list.get(position).isSelected());
return view;
}
}
logcat结果：
02-08 10:44:28.142: E/check Box value and position(293): AAAA Qqq 02-08 10:44:28.142: E/check Box value and position(293): Mobile-123 02-08 10:44:28.152: E/position(293): 0 **after scrolling the list view some other item print 0th position unselected and wrong data:** 02-08 10:44:31.962: E/position unselect(293): 0---------F212 02-08 10:44:31.962: E/position unselect(293): Home-232
解决方法
我解决了这个问题.我加了
View view = null;
convertView = null; //in the get view and comments the else part of
if (convertView == null) {
}
/*else{
} */
