如何从ListView中检索_id位置
问题描述:
我需要检索Listview中项目的_id。我现在所能得到的就是这个位置。我怎样才能做到这一点?。这是我正在使用的代码。如何从ListView中检索_id位置
public class OSListActivity extends ListActivity {
................
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
................
................
MatrixCursor cursor;
cursor = datasource.getnameList();
if (cursor.moveToFirst()) {
startManagingCursor(cursor);
String vdstatus = cursor.getString(6);
System.out.println("vdstatus : " + vdstatus);
String[] from = { "name", "desc", "status", "path", "folder",
BaseColumns._ID };
int[] to = { R.id.name, R.id.desc, R.id.status, R.id.path };
final VSsimplecursoradapter adapter = new VSsimplecursoradapter(
this, R.layout.row, cursor, from, to);
setListAdapter(adapter);
}
}
@Override
public void onListItemClick(ListView parent, View view, int position,
long id) {
Intent intent = new Intent(this, VSDetailsActivity.class);
intent.putExtra("com.manager.boot.r1223."+BaseColumns._ID, position);//TODO put _id instead of position
startActivity(intent);
}
}
编辑:解
public void onListItemClick(ListView parent, View view, int position,
long id) {
// Starts TestDetails activity on clicking a list item.
Cursor cursor = (Cursor) adapter.getItem(position);
Intent intent = new Intent(this, VSDetailsActivity.class);
intent.putExtra("com.manager.boot.r1223."+BaseColumns._ID, cursor.getInt(cursor
.getColumnIndex("_id")));
startActivity(intent);
}
答
你已经得到了它。查看该方法的参数。请参阅“长ID”部分?这就是你要找的。
答
我使用String s = ((Cursor) l.getItemAtPosition(position)).getString(0);
只是解析它。
什么是_id?你需要详细说明。 – straya 2012-03-01 01:44:14
@straya它是适配器用作列名称的字符串'BaseColumns._ID'。 – 2012-03-01 01:45:54
为什么在问一个问题时不要模棱两可的好例子! – straya 2012-03-01 02:09:30