Android Studio片段RoomListFragment未附加到活动（在导航抽屉中启动新活动）

Question

我在RoomListFragment类中打开新活动时遇到问题。我使用导航抽屉。

这是我的RoomListFragment.class

public class RoomListFragment extends Fragment {
private View root;

public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    root = inflater.inflate(R.layout.fragment_rooms, container, false);

    ListView listView = root.findViewById(R.id.listView);

    RoomListAdapter adapter = new RoomListAdapter(root.getContext(),mTitle,mDescription);

    listView.setAdapter(adapter);

    return root;
}

void startRoomEditManagerActivity(Context context) {
    Intent intent = new Intent(context, RoomEditManager.class);
    startActivity(intent);
}

}

和我的第二堂课，这里有一个带有我活动功能的按钮startRoomEditManagerActivity

   RoomListAdapter(Context roomListContext, String[] roomListName, String[] roomListDescription) {
    super(roomListContext, R.layout.row, R.id.testTextView1, roomListName);
    this.roomListName = roomListName;
    this.roomListDescription = roomListDescription;
    this.contextRoomList = roomListContext;
}
        @Override
        public void onClick(View v) {
            editRoomButton.setText(roomListName[position]);

            Toast.makeText(getContext(), roomListName[position] +" id : " + String.valueOf(editRoomButton.getId()),Toast.LENGTH_SHORT).show();

            RoomListFragment roomlistFragment = new RoomListFragment();
            roomlistFragment.startRoomEditManagerActivity(contextRoomList);

        }

感谢您的帮助^^

Answer 1

用]替换onclick>

 @Override
        public void onClick(View v) {
            editRoomButton.setText(roomListName[position]);

            Toast.makeText(getContext(), roomListName[position] +" id : " + String.valueOf(editRoomButton.getId()),Toast.LENGTH_SHORT).show();

Intent intent = new Intent(contextRoomList , RoomEditManager.class);
    startActivity(intent);

        }
然后，在您的roomlistFragment中，您不需要以下代码

void startRoomEditManagerActivity(Context context) {
    Intent intent = new Intent(context, RoomEditManager.class);
    contextRoomList.startActivity(intent);
}