android – onActivityResult不在Fragment中调用

应用程序的结构如下：

tabHost (in Activity) -> contains -> TabFragment(extend base container fragment)

1.活动中的代码：

tabHost.addTab(
                tabHost.newTabSpec("home").setIndicator("",
                        getResources().getDrawable(R.drawable.btn_home)),
                HomeFragment.class, null);

2. HomeFragment中的代码
(请注意,HomeFragment不是实际的函数,而是像这样的容器,它扩展了BaseContainerFragment)：

public class HomeFragment extends BaseContainerFragment {

    public Home homeFrag;
    private boolean mIsViewInited;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.container_fragment, null);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        if (!mIsViewInited) {
            mIsViewInited = true;
            initView();
        }
    }

    private void initView() {
        homeFrag = new Home();
        replaceFragment(homeFrag, false);
    }

}

3. BaseContainerFragment

public class BaseContainerFragment extends Fragment {

    public void replaceFragment(Fragment fragment, boolean addToBackStack) {
        FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
        if (addToBackStack) {
            transaction.addToBackStack(null);
        }
        transaction.replace(R.id.container_framelayout, fragment);
        transaction.commit();
    }

    public boolean popFragment() {
        boolean isPop = false;
        if (getChildFragmentManager().getBackStackEntryCount() > 0) {
            isPop = true;
            getChildFragmentManager().popBackStack();
        }
        return isPop;
    }

}

4.在Home(片段的实际内容)

UploadType fragment = new UploadType();
                    Bundle bundle = new Bundle();
                    bundle.putString("form_type", "request");
                    fragment.setArguments(bundle);
                    ((BaseContainerFragment)getParentFragment()).replaceFragment(fragment, true);

5.在UploadType中,我调用相机活动,但onActivityResult仅在主活动中返回.

startActivityForResult(intent, REQUEST_CAMERA);

public void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.d("test1", "result2");
        super.onActivityResult(requestCode, resultCode, data);
}

如何在UploadType上触发onActivityResult？感谢帮助.

解决方法:

这不起作用的原因是因为您从嵌套片段中调用startActivityForResult(). Android足够聪明,可以将结果路由回Activity,甚至是片段,但不会将其路由到嵌套片段,因此您无法获得回调.
(更多信息为什么不起作用here或stackoverflow)

现在为了使其工作,我建议您手动将回调路由到ParentFragment(= BaseContainerFragment)中的ChildFragment(= UploadType)：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Fragment uploadType = getChildFragmentManager().findFragmentById(R.id.container_framelayout);

    if (uploadType != null) {
        uploadType.onActivityResult(requestCode, resultCode, data);
    }
    super.onActivityResult(requestCode, resultCode, data);
}

标签：onactivityresult,android,android-fragments,android-activity,android-tabhost
来源： https://codeday.me/bug/20190926/1819417.html