android - Android O 中 DialogFragment 中 onActivityResult 的不同行为

Question

startActivityForResult从DialogFragment. _

在MainActivity下面，当在对话框上按下“确定”时，它会自行关闭，创建并显示一个新对话框，并调用startActivityForResult. 立即完成。AnotherActivityAnotherActivity

在 Android 7 上，onActivityResult在新对话框实例上调用。在 Android 8onActivityResult上，从不调用。

谁能解释这个区别？

MCVE

public class MainActivity extends AppCompatActivity {

    private static final String FRAGMENT_TAG = "tag";

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        new SomeDialogFragment().show(getFragmentManager(), FRAGMENT_TAG);
    }

    public static class SomeDialogFragment extends DialogFragment
    {
        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState)
        {
            super.onCreateDialog(savedInstanceState);

            AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

            builder.setPositiveButton(
                    "OK",
                    new DialogInterface.OnClickListener()
                    {
                        @Override
                        public void onClick(DialogInterface d, int which)
                        {
                            dismiss();
                            SomeDialogFragment dialog = new SomeDialogFragment();
                            dialog.show(getFragmentManager(), FRAGMENT_TAG);
                            startActivityForResult(new Intent(getActivity(), AnotherActivity.class), 7);
                        }
                    });

            return builder.create();
        }

        @Override
        public void onActivityResult(int requestCode, int resultCode, Intent data)
        {
            // Called on Android 7 but not Android 8.
        }
    }
}

和

public class AnotherActivity extends AppCompatActivity
{
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setResult(1);
        finish();
    }
}