Question

我有一个包含FragmentTabHost的片段。我把它设置在这里：

 @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_settings_organization, container, false);
        Log.v(TabHome.TAG, "SettingsOrganization onCreateView()");
        setUpActionBar();

        TextView headerView =(TextView) v.findViewById(R.id.orgNameHeader);
        headerView.setText(organization.name);

     //   showSpinner(true);
        mTabHost = (FragmentTabHost) v.findViewById(android.R.id.tabhost);

        mTabHost.setup(activity, this.getChildFragmentManager(), R.id.realtabcontent);
        mTabHost.setVisibility(View.INVISIBLE);
        mTabHost.addTab(
                mTabHost.newTabSpec("text")
                        .setIndicator(getString(R.string.settings_text_select), activity.getResources().getDrawable(R.drawable.ic_home)),
                SettingsOrganizationTabFragment_.class, null
        );


        mTabHost.addTab(
                mTabHost.newTabSpec("voice")
                        .setIndicator(getString(R.string.settings_voice_select), activity.getResources().getDrawable(R.drawable.ic_home)),
                SettingsOrganizationTabFragment_.class, null
        );

        mTabHost.addTab(
                mTabHost.newTabSpec("app")
                        .setIndicator(getString(R.string.settings_app_select), activity.getResources().getDrawable(R.drawable.ic_home)),
                SettingsOrganizationTabFragment_.class, null
        );


        restClient = new RestClient_();
        SettingsOrganizationErrorHandler errorHandler = new SettingsOrganizationErrorHandler();
        restClient.setRestErrorHandler(errorHandler);
        RestTemplate restTemplate = restClient.getRestTemplate();
        ClientHttpRequestFactory factory = RestClientHelper.clientHttpRequestFactory();
        restTemplate.setRequestFactory(factory);
        RestClientHelper.prepareRestClient(restClient);
        restClient.setHeader("Auth-Token",TabHome.authToken);

        GetSettingsTask task = new GetSettingsTask();
        task.execute();


        if (savedInstanceState != null) {
            mTabHost.setCurrentTabByTag(savedInstanceState.getString("text"));
        }

        return v;
    }

您还可以在此处看到我启动后台任务来获取一些数据。完成后，我需要更新所有三个选项卡。问题是只存在第一个选项卡;其他人都是空的。

我还尝试更新onTabChanged（）中的其他选项卡，但在这种情况下，当frag不是第一个选项卡时，frag为null：

mTabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
    @Override
    public void onTabChanged(String tabId) {
        Log.v(TabHome.TAG,"Tab ID:"+ tabId);
        SettingsOrganizationTabFragment frag = (SettingsOrganizationTabFragment)thisFrag.getChildFragmentManager().findFragmentByTag(tabId);
        if (tabId.equalsIgnoreCase("text")){
            frag.notificationType=SettingsOrganizationTabFragment.NOTIFICATION_TYPE_TEXT;
            frag.settings =settings;
            frag.updateView();
        }

        if(tabId.equalsIgnoreCase("voice")){
            frag.notificationType=SettingsOrganizationTabFragment.NOTIFICATION_TYPE_VOICE;
            frag.settings =settings;
            frag.updateView();
        }

        if(tabId.equalsIgnoreCase("app")){
            frag.notificationType=SettingsOrganizationTabFragment.NOTIFICATION_TYPE_APP;
            frag.settings =settings;
            frag.updateView();
        }
    }
});

（thisFrag指的是包含fragmentTabHost的片段）

如果其他标签尚未显示，我该如何更新？

谢谢！

Answer 1

执行此操作的唯一方法是创建选项卡，如果它们仍然为null，或使用MVC模式中的模型。我建议第二种选择。实际创建选项卡后，您将从模型中获取选项卡所需的信息。

public class SecondTab {
private Model model;
private String infoS;
private int infoI;
private boolean infoB;

    public SecondTab(Model model) {
        this.model = model;
        infoS = model.getInfoS();
        infoI = model.getInfoI();
        infoB = model.getInfoB
    }

    public void editInfoS(String s){
        model.setInfoS(s);
    }
}

然后您将传递，然后在更新选项卡时将更新的信息添加到模型中。实际创建选项卡时，只需将模型传递给它。

Answer 2

我最终使用了我的标签片段的onResume（）方法，每次选择标签时都会调用该方法。我到达并获取父片段（具有我需要的获取数据），然后相应地更新选项卡，如果数据存在。

@Override
public void onResume(){
    Log.v(TabHome.TAG, "SettingsOrganizationTab - onResume");
    super.onResume();
    TabHome.activeFragment = this;
    activity.supportInvalidateOptionsMenu();

    parent = (SettingsOrganizationFragment)this.getParentFragment();
    Log.v(TabHome.TAG,"Selected Tab: "+parent.mTabHost.getCurrentTab());
    notificationType = parent.mTabHost.getCurrentTab();
    if (parent.settings!=null){

        updateView();
    }


}

Android：FragmentTabHost null片段

2 个答案: