程序的ListView视图中设置有复选框。我想从ListView中获取选中的项目,例如:MyFiles应用程序中用复选框选择多个文件,然后点击单个删除按钮就能删除所有的文件。有什么方法实现这样的功能呢?
public class MyAdapter extends SimpleAdapter {
//private List<Table> tables;
SharedPreferences prefs;
private Activity activity;
String val = "";
//@SuppressWarnings("unchecked")
public MyAdapter(Activity context, List<? extends Map<String, String>> tables, int resource, String[] from,
int[] to) {
super(context, tables, resource, from, to);
//this.tables = (List<Table>) tables;
activity = context;
}
public View getView(final int position, final View convertView, ViewGroup parent) {
View row = super.getView(position, convertView, parent);
if (row == null)
{
LayoutInflater inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.reports_list, null);
}
final CheckBox cBox=(CheckBox)row.findViewById(R.id.cb1);
if(bulkflag)
{
cBox.setVisibility(View.VISIBLE);
}
else
{
cBox.setVisibility(View.GONE);
}
cBox.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if(cBox.isChecked())
{
selectedIds.add(recIdArr.get(reportslistview.getPositionForView(cBox)));
//System.out.println("position "+reportslistview.getPositionForView(cBox));
}
else
{
selectedIds.remove(recIdArr.get(reportslistview.getPositionForView(cBox)));
}
}
});
return row;
}
}
然后检查:
for(int i=0;i<selectedIds.size();i++)
{
System.out.println("delete multiple"+selectedIds.size()+" "+Integer.parseInt(selectedIds.get(i)));
}
把selectedIds声明为全局变量。
Listview list;
ArrayAdapter<String> aa=new ArrayAdapter<String>this,android.R.layout.simple_list_item_multiple_choice,"Arraylist name");
list.setAdapter(aa);
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
//code
}
关键是你要有一个集合来准确记录你选中的文件,删除时从集合里取出记录,调用你的删除方法就好了
代码的写法就多了
上面 nana4ever的回答是可以,应该就是那种思路,如果是4.0的系统也可以用下面这种,系统带的,也挺方便的,原理是一样的。
ListView mList = getListView();
ModeCallback multiListener = new ModeCallback();
mList.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
mList.setMultiChoiceModeListener(multiListener);
public class ModeCallback implements ListView.MultiChoiceModeListene {}
这个要实现必要的方法
.