我有一个ListView,可以长按其中一个元素创建一个ContextMenu。如何找到在创建此上下文菜单的ListView中选择的元素(而不是选定的MenuItem)?这是我的代码:
list.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {
@Override
public void onCreateContextMenu(ContextMenu menu, final View v,
ContextMenuInfo menuInfo) {
menu.setHeaderTitle("Actions");
android.view.MenuItem remove = menu.add("Remove");
final int selectedItem = ((ListView)v).getSelectedItemPosition();
remove.setOnMenuItemClickListener(new OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(android.view.MenuItem item) {
doSomething(listAdapter.getItem(selectedItem)); // NPE here
return true;
}
});
}
});
请注意,我不想要从上下文菜单中选择的项目,而是需要触发此上下文菜单的ListView项目。
答案 0 :(得分:8)
您需要AdapterContextMenuInfo
。
以下代码段将帮助您
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
String[] names = getResources().getStringArray(R.array.names);
switch(item.getItemId()) {
case R.id.edit:
Toast.makeText(this, "You have chosen the " + getResources().getString(R.string.edit) +
" context menu option for " + names[(int)info.id],
Toast.LENGTH_SHORT).show();
return true;
…………………..
default:
return super.onContextItemSelected(item);
}