从ViewPager的子片段调用startActivityResult()时，不会调用onActivityResult()

在我的情况下，我正在通过使用我的子片段类中的intent(即视图分页器的选项卡之一)从联系人那里获取手机号码.

In my case i was picking up the mobile number from the contact by using intent in my child fragment class i.e. one of tab of view pager.

从MainActivity调用父片段:

//Home是我的父片段，其中包含Tab布局和View Pager.我通过指定标签来调用Home Fragment，稍后我将使用此标签.

// Home is my parent fragment which contains Tab Layout and View Pager. I am calling Home Fragment by specifying tag, i will use this tag later on.

Fragment fragment = new Home();
fragmentManager.beginTransaction()
               .replace(R.id.main_content, fragment, "MobileTag")
               .addToBackStack(null)
               .commit();

在我的孩子片段"课程中:

Intent intent = new Intent(Intent.ACTION_PICK, 
                           ContactsContract.Contacts.CONTENT_URI);
intent.setType(ContactsContract.CommonDataKinds.Phone.CONTENT_TYPE);
startActivityForResult(intent, 1);

现在它将调用MainActivity类的onActivityResult方法 在主要活动中:

Now it will call the onActivityResult method of MainActivity class In Main Activity:

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
}

通过在MainActivity的onActivityResult中调用super将调用父片段的i.e.，即Home Fragment的onActivityResult方法.

By Calling super in onActivityResult of MainActivity will make a call to Parent fragment's i.e. Home Fragment's onActivityResult method.

在父片段"(即家庭片段")中

In Parent Fragment i.e. Home Fragment:

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    Fragment fragment = getFragmentManager()
        .findFragmentByTag("MobileTag")
        .getChildFragmentManager()
        .getFragments()
        .get(0);
    fragment.onActivityResult(requestCode, resultCode, data);
}

在这里，我得到了父片段的第0个子元素，例如在查看寻呼机适配器"中是否添加了片段，如:

here I am getting the 0th Child of parent fragment e.g. In View Pager Adapter if Fragment are added like:

@Override
public Fragment getItem(int position) {
    switch (position){
        case 0 :return new ChildFragment0();
        case 1 : return new ChildFragment1();
        case 2 : return new ChildFragment2();
    }
    return null;
}

然后

getFragmentManager()
   .findFragmentByTag("MobileTag")
   .getChildFragmentManager()
   .getFragments()
   .get(0); // will return ChildFragment0

此后，调用子片段的onActivityResult方法:

After this Make a call to child fragment's onActivityResult method:

最后是子片段:

public void onActivityResult(int reqCode, int resultCode, Intent data) {
    Cursor cursor = null;
    String contactNumber = "";           
    Uri result = data.getData();
    // get the result here
}