android - 在ViewPager中将数据从Activity传递给Fragment

Question

我有一个简单的Activity,其中包含TabLayout,ViewPager和2个片段.这是我的活动:

public class ManagementCompanyOverviewActivity extends BaseActivity implements ManagementCompanyOverviewView {

    private ManagementCompanyVPAdapter mVPAdapter;
    private TabLayout mTLContent;
    private ViewPager mVPContent;

    @InjectPresenter
    ManagementCompanyPresenter mPresenter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_management_company);

        mVPAdapter = new ManagementCompanyVPAdapter(getSupportFragmentManager());

        mTLContent = (TabLayout) findViewById(R.id.tl_company_content);

        mVPContent = (ViewPager) findViewById(R.id.vp_company_content);
        mVPContent.setAdapter(mVPAdapter);
        mTLContent.setupWithViewPager(mVPContent);
    }

    @Override
    public void onAboutCompanyInfoReceivedFromServer(AboutCompanyViewModel model) {

    }

Activity有一个Presenter(我正在使用Moxy),Presenter发送请求,得到答案,创建JavaObject(视图模型)getViewState()并将此模型传递给activity.我需要将此模型从Activity传递给我的一个片段.

Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.fragment_about_company, container, false);

    mTVName = (TextView) view.findViewById(R.id.tv_company_name);
    mTVDirector = (TextView) view.findViewById(R.id.tv_company_director);
    mTVWebsite = (TextView) view.findViewById(R.id.tv_company_website);
    mTVEmail = (TextView) view.findViewById(R.id.tv_company_email);
    mTVPhone = (TextView) view.findViewById(R.id.tv_company_phone);
    mTVSchedule = (TextView) view.findViewById(R.id.tv_company_schedule);
    mTVAddress = (TextView) view.findViewById(R.id.tv_company_address);

    return view;
}

这个片段有一些TextViews来显示我的模型中的信息.如何通过这个模型？如果我知道它应该创造一个倾听者,但是如何？我不完全理解如何使用em.

Answer 1

好的,我这样做了.

1步:我在我的Activity和setter中为它创建了公共接口:

private OnAboutDataReceivedListener mAboutDataListener;

public interface OnAboutDataReceivedListener {
        void onDataReceived(AboutCompanyViewModel model);
    }

public void setAboutDataListener(OnAboutDataReceivedListener listener) {
    this.mAboutDataListener = listener;
}

第2步:我在Fragment中实现了这个接口并设置了监听器:

public class AboutCompanyFragment extends BaseFragment implements ManagementCompanyOverviewActivity.OnAboutDataReceivedListener

    @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            mActivity = (ManagementCompanyOverviewActivity) getActivity();
            mActivity.setAboutDataListener(this);
        }

第3步:我重写了接口的方法:

@Override
    public void onDataReceived(AboutCompanyViewModel model) {
        mPBName.setVisibility(View.INVISIBLE);
        mPBDirector.setVisibility(View.INVISIBLE);
        mPBWebsite.setVisibility(View.INVISIBLE);
        mPBEmail.setVisibility(View.INVISIBLE);
        mPBPhone.setVisibility(View.INVISIBLE);
        mPBSchedule.setVisibility(View.INVISIBLE);
        mPBAddress.setVisibility(View.INVISIBLE);

        mTVName.setVisibility(View.VISIBLE);
        mTVDirector.setVisibility(View.VISIBLE);
        mTVWebsite.setVisibility(View.VISIBLE);
        mTVEmail.setVisibility(View.VISIBLE);
        mTVPhone.setVisibility(View.VISIBLE);
        mTVSchedule.setVisibility(View.VISIBLE);
        mTVAddress.setVisibility(View.VISIBLE);

        mTVName.setText(model.getCompanyName());
        mTVDirector.setText(model.getDirectorName());
        mTVWebsite.setText(model.getWebsite());
        mTVEmail.setText(model.getEmail());
        mTVPhone.setText(model.getPhone());
        mTVSchedule.setText(model.getWorkTime());
        mTVAddress.setText(model.getAddress());
    }

而已.

Answer 2

在活动中试试这个

public String sendData() {
        return YOUR_STRING;
    }

在片段中

YOUR_ACTIVITY activity = (YOUR_ACTIVITY) getActivity();
String getData = activity.SendData();

Answer 3

您可以在 Fragment 中使用 newInstance 方法：

public static MyFragment newInstance(String parameter) {

        Bundle args = new Bundle();
        args.putString("parameter", parameter);
        SfCategoryFragment fragment = new SfCategoryFragment();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (getArguments() != null) {
            parameter = getArguments().getString("parameter");
        }
    }

在你的活动中：

而不是new MyFragment()使用MyFragment.newInstance("yourParam");