我使用的是 DialogFragment ，对此我表示这样从活动：

I am using a DialogFragment, which I am showing like this from an Activity:

DialogFragmentImage dialog = DialogFragmentImage.newInstance(createBitmap());
dialog.onDismiss(dialog);.onDismiss(this);          
dialog.show(getFragmentManager(), "DialogFragmentImage");

我想检查时， DialogFragment 被驳回（例如，当后退按钮是pressed），但在我的活动。我该怎么办呢？我怎么能告诉我的活动的 DialogFragmen T已经被解雇？

I would like to check when the DialogFragment was dismissed (for example when the back button was pressed), but in my Activity. How can I do that? How can I "tell" my activity that the DialogFragment has been dismissed?

推荐答案

请您活动实施 OnDismissListener

public final class YourActivity extends Activity implements DialogInterface.OnDismissListener {

    @Override
    public void onDismiss(final DialogInterface dialog) {
        //Fragment dialog had been dismissed
    }

}

DialogFragment已经实现了 OnDismissListener ，只是覆盖的方法，并调用活动。

DialogFragment already implements OnDismissListener, just override the method and call the Activity.

public final class DialogFragmentImage extends DialogFragment {

    ///blah blah

    @Override
    public void onDismiss(final DialogInterface dialog) {
        super.onDismiss(dialog);
        final Activity activity = getActivity();
        if (activity instanceof DialogInterface.OnDismissListener) {
            ((DialogInterface.OnDismissListener) activity).onDismiss(dialog);
        }
    }

}

如果你从一个片段，使用 childFragment 管理​​器来启动的对话框（API> = 17），你可以使用 getParentFragment 谈父片段的onDismissListener：

If you're starting the dialog from a fragment using the childFragment manager (API>=17), you can use getParentFragment to talk to the onDismissListener on the parent fragment.:

public final class DialogFragmentImage extends DialogFragment {

    ///blah blah

    @Override
    public void onDismiss(final DialogInterface dialog) {
        super.onDismiss(dialog);
        Fragment parentFragment = getParentFragment();
        if (parentFragment instanceof DialogInterface.OnDismissListener) {
            ((DialogInterface.OnDismissListener) parentFragment).onDismiss(dialog);
        } 
    }

}