如何获取多选ListView中选中的选中项，请高手赐教~

import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.util.Log;
import android.view.KeyEvent;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class ShowPeopleList extends ListActivity {
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Cursor c=getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
        startManagingCursor(c);

        ListAdapter adapter=new SimpleCursorAdapter(this,
         android.R.layout.simple_list_item_multiple_choice,
         c, new String[]{ContactsContract.Contacts.DISPLAY_NAME,ContactsContract.Contacts.HAS_PHONE_NUMBER},
         new int[]{android.R.id.text1,android.R.id.text2});
        setListAdapter(adapter);

        final ListView listView = getListView();

        listView.setItemsCanFocus(false);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
    }

@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if(keyCode==KeyEvent.KEYCODE_BACK&&event.getRepeatCount()==0)
{
event.startTracking();
return true;

}
return super.onKeyDown(keyCode, event);
}

@Override
public boolean onKeyUp(int keyCode,KeyEvent event)
{
if(keyCode==KeyEvent.KEYCODE_BACK && event.isTracking()&&!event.isCanceled())
{
Intent intent=new Intent();
intent.setClass(ShowPeopleList.this, SMSManager.class);
Bundle b=new Bundle();
b.putString("txt", "a");
intent.putExtras(b);
setResult(RESULT_OK, intent);
finish();

return true;
}

return super.onKeyUp(keyCode, event);
}
}
小弟写了一段显示所有联系人的代码，但是不知道如何在onKeyUp事件中获取ListView中选中的联系人的信息，请高手帮帮忙 --------------------编程问答-------------------- listView.setOnItemClickListener(new OnItemClickListener() {

  public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {

//view对象就是你所选的那一栏,下面获取里面的子控件。当然个人还是自己写XML定义一个//ListView，便于处理.
view.findViewById(android.R.id.text1);//应该是TextView类型的
view.findViewById(android.R.id.text2);//应该是TextView类型的

}
}); --------------------编程问答--------------------

private ArrayList<String> lists;

	ListView listView;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        lists=new ArrayList<String>();

        Cursor c=getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);

        startManagingCursor(c);

        if(c!=null){

        	c.moveToFirst();

        	do{

        		lists.add(c.getString(c.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)));

        	}while(c.moveToNext());

        }

        ListAdapter adapter=new SimpleCursorAdapter(this,  

        android.R.layout.simple_list_item_multiple_choice,

        c, new String[]{ContactsContract.Contacts.DISPLAY_NAME,ContactsContract.Contacts.HAS_PHONE_NUMBER},

        new int[]{android.R.id.text1,android.R.id.text2});

        setListAdapter(adapter);

        listView = getListView();

        listView.setItemsCanFocus(false);

        listView.setOnItemClickListener(this);

        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

    }



	@Override

	public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

		// TODO Auto-generated method stub

		SparseBooleanArray a = listView.getCheckedItemPositions();

		for(int i = 0; i < lists.size() ; i++)

        {

            if (a.valueAt(i))

            {

                Long val = listView.getAdapter().getItemId(a.keyAt(i));

                Toast.makeText(ShowPeopleList.this, "index="+val.toString()+lists.get(i), Toast.LENGTH_SHORT).show();

            }

        }



	}

补充：移动开发 ,  Android