onActivityResult在片段不叫 [英] onActivityResult not call in the Fragment

问题描述

应用程序的结构是这样的：

The structure of the app is like this:

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

1。在code。在活动

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

2。在code在HomeFragment （请注意，HomeFragment是不实际的功能，但这样的容器中，并将其扩展BaseContainerFragment）：

2. The code in HomeFragment (Notice that HomeFragment is not the actual function but a container like this, and it extend 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。在主页（该片段的实际内容）

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

5。而在UploadType，我调用摄像头活动，但onActivityResult只返回的主要活动。

startActivityForResult(intent, REQUEST_CAMERA);

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

我怎样才能触发onActivityResult在UploadType？感谢您的帮助。

How can I trigger the onActivityResult at UploadType? Thanks for help.

推荐答案

为什么这不工作的原因是因为您正在呼叫 startActivityForResult（）在嵌套分段。 Android是足够聪明的航线将结果返回给一个活动甚至片段，而不是一个嵌套的片段因此，为什么你没有得到回调。 （更多信息，为什么不在这里工作了 或<一href="https://stackoverflow.com/questions/13580075/onactivityresult-not-called-in-new-nested-fragment-api">stackoverflow)

The reason why this doesn't work is because you are calling startActivityForResult() from within a nested fragment. Android is smart enough to route the result back to an Activity and even a Fragment, but not to a nested Fragment hence why you don't get the callback. (more information to why that doesn't work here or on stackoverflow)

现在，为了使它工作，我建议你手动航线回调到 ChildFragment （= UploadType ）在 ParentFragment （= BaseContainerFragment ）：

Now in order to make it work I suggest you manually route the callback to the ChildFragment (=UploadType) in the ParentFragment (=BaseContainerFragment):

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);
}

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