Question

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);
    }

}

第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。在家中（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，我调用了相机活动，但onActivityResult仅在主要活动中返回。

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？谢谢你的帮助。

Answer 1

这不起作用的原因是因为您在嵌套片段中调用startActivityForResult()。 Android非常智能，可以将结果路由回Activity甚至是Fragment，但不会回到嵌套Fragment，因此您无法获得回调。（有关为什么不起作用的更多信息here或stackoverflow）

现在为了使其正常工作，我建议您手动将回调路由到ChildFragment（= UploadType）中的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);
}

Answer 2

就我而言，我已在0 || 1 250 || 2 ...

中添加以下代码

MainActivity.java

Answer 3

在你的活动覆盖onActivityForResult（）中，像这样

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
    }

现在在你的片段中，你可以在这个

中获得活动结果

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      Log.d("test1", "result2");
    }

确保当你正在调用启动ActivityForResult时，它应该像这样

startActivityForResult(intent, REQUEST_CAMERA);

Answer 4

TabActivity-＆gt; ActivityA-＆gt; FragmentB，它不起作用。

使用坏的坏方法：

ActivityA.java

public void onSelectSomething(){

    ...

    startActivityForResult(intent, 22222);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (mFragment != null) {
        mFragment.onActivityResult(requestCode, resultCode, data);
    }
}

FragmentB.java

if(getActivity() instanceof ActivityA) {
    ((RepairerListActivity)getActivity()).onSelectSomething();
} 


@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 22222) {
        // do things
    }
}

Answer 5

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    // Loop through all child fragments of the activity
    for (Fragment fragment : getSupportFragmentManager().getFragments()) {

        // check if the current fragment is YourFragment
        if (fragment instanceof YourFragment ) {
            fragment.onActivityResult(requestCode, resultCode, data);
        }

    }
}

Answer 6

用于导航架构组件的NavHostFragment

如果您正在使用单个活动，并且在NavHostFragment内有片段，则存在onActivityResult()的子片段NavHostFragment未被调用的问题。

要解决此问题，您需要从主机活动的onActivityResult()内部手动调用子片段的onActivityResult()。托管活动是托管您的NavHostFragment的活动。

以下是您的主机活动onActivityResult()的Kotlin代码：

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)
    val navHostFragment = supportFragmentManager.findFragmentById(R.id.your_nav_host_fragment)
    val childFragments = navHostFragment?.childFragmentManager?.fragments
    childFragments?.forEach { it.onActivityResult(requestCode, resultCode, data) }
}

onActivityResult不在Fragment中调用

6 个答案:

用于导航架构组件的NavHostFragment