Android刷新适配器工作后再次旋转设备

Question

当我的一些数据添加到"列表模式"并恢复已保存的数据旋转装置上,不幸的是还原后的数据和设置此代码工作正常model范围内onRestoreInstanceState的方法,增加其他数据到后,适配器无法与新添加的数据,数据刷新可以更新后适配器中的源,但适配器可以; t知道它们,我正在使用MVVM数据模型绑定并搜索更多关于此问题的时间我无法解决这个问题.

Rhat有一个简单的提示,在再次旋转设备后,我的适配器可以刷新所有添加的数据,适配器不用它们刷新.

public class ActivityRegister extends BaseActivities{
    private  List<RobotViewModel> model  = new ArrayList<>();
    ...
    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ...
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        outState.putParcelable("model", Parcels.wrap(model));
        super.onSaveInstanceState(outState);
    }

    @Override
    protected void onRestoreInstanceState(Bundle outState) {
        model = Parcels.unwrap(outState.getParcelable("model"));

        adapter.setData(model);
        adapter.notifyItemInserted(model.size() - 1);
        binding.registerRobot.scrollToPosition(adapter.getItemCount() - 1);
    }

添加到model方法:

    @Override
    public void clickOnSendCommandToRobot() {
        RobotViewModel temp = new RobotViewModel();

temp.setMessage("message");

        temp.setCommand(true);

        model.add(temp);

        adapter.notifyItemInserted(model.size() - 1);
        binding.registerRobot.scrollToPosition(adapter.getItemCount() - 1);
    }

我的适配器类:

public class RobotMessagesAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private List<RobotViewModel> list;
    private LayoutInflater       inflater;

    public RobotMessagesAdapter(List<RobotViewModel> robotViewModels) {
        this.list = robotViewModels;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (inflater == null) {
            inflater = LayoutInflater.from(parent.getContext());
        }
        if (viewType == SV.RobotMessageType.SENT_BY_USER.ordinal()) {
            return new UserViewHolder(UserMessagesDataBinding.inflate(inflater, parent, false));
        } else {
            return new RobotViewHolder(RobotDataBinding.inflate(inflater, parent, false));
        }
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        switch (getItemViewType(position)) {
            case 0:
                ((UserViewHolder) holder).bind(list.get(position));
                break;
            case 1:
                ((RobotViewHolder) holder).bind(list.get(position));
                break;
        }
    }

    ...

    public void setData(List<RobotViewModel> data) {
        Log.e("data size ", data.size() + "");
        list.clear();
        list.addAll(data);
    }
}

我想知道为什么这段代码工作正常:

    @Override
    protected void onRestoreInstanceState(Bundle outState) {
        model = Parcels.unwrap(outState.getParcelable("model"));

        adapter.setData(model);
        adapter.notifyItemInserted(model.size() - 1);
        binding.registerRobot.scrollToPosition(adapter.getItemCount() - 1);

        RobotViewModel temp = new RobotViewModel();

temp.setMessage("message");

        temp.setCommand(true);

        model.add(temp);

        adapter.notifyItemInserted(model.size() - 1);
        binding.registerRobot.scrollToPosition(adapter.getItemCount() - 1);
    }

没有任何问题,移动这一行后:

        RobotViewModel temp = new RobotViewModel();

temp.setMessage("message");

        temp.setCommand(true);

        model.add(temp);

        adapter.notifyItemInserted(model.size() - 1);
        binding.registerRobot.scrollToPosition(adapter.getItemCount() - 1);

到其他不起作用的方法:|

我的主持人:

public class ActivityRegisterPresenter {
    private ActivityRegisterContract view;

    public ActivityRegisterPresenter(ActivityRegisterContract mView) {
        view = mView;
    }

    ...
}

和我的ViewModel:

public class ActivityRegisterViewModel extends BaseObservable {
    private String readContactPermission;
    private String getMessages;

    public ActivityRegisterViewModel() {
    }

    @Bindable
    public String getReadContactPermission() {
        return readContactPermission;
    }

    public void setReadContactPermission(String readContactPermission) {
        this.readContactPermission = readContactPermission;
        notifyChange();
    }

    public String getGetMessages() {
        return getMessages;
    }

    public void setGetMessages(String getMessages) {
        this.getMessages = getMessages;
    }
}

消息代码在这里

问题在于clickOnRegisterMobileNumber和clickOnSendCommandToRobot方法

Answer 1

我的问题解决了,

将以下行添加到清单中,以便在setAdapter中显示特定活动

android:configChanges="screenSize|orientation|screenLayout" 

但如果您设计"纵向"和"横向"布局,或仅在这两种模式中运行应用程序,它将返回最佳视图.