要從選定的ListView項中獲取該項，請參考ContextMenuInfo對象(請參見下面的最后一個實現方法)。完整解決方案如下：

1)在ListActivity類中為上下文菜單注冊ListView

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// ...

getListView().setAdapter(mAdapter);

registerForContextMenu(getListView());

}

1a)如果列表上有復雜的視圖，則可能需要在Adapter類中的每個列表視圖上啟用長按

@Override

public View getView(int position, View convertView, ViewGroup parent) {

View view = convertView;

if (view == null) {

RelativeLayout layout = (RelativeLayout) LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);

itemLayout = layout;

itemLayout.setLongClickable(true);

}

// ...

return view;

}

2)在ListActivity類中實現onCreateContextMenu()和onContextItemSelected()

@Override

public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {

super.onCreateContextMenu(menu, v, menuInfo);

AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;

String title = ((MyItem) mAdapter.getItem(info.position)).getTitle();

menu.setHeaderTitle(title);

menu.add(Menu.NONE, MENU_CONTEXT_DELETE_ID, Menu.NONE, DELETE_TEXT);

}

@Override

public boolean onContextItemSelected(MenuItem item) {

switch (item.getItemId()) {

case MENU_CONTEXT_DELETE_ID:

AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();

Log.d(TAG, "removing item pos=" + info.position);

mAdapter.remove(info.position);

return true;

default:

return super.onContextItemSelected(item);

}

}

總結

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