这是我的解决方案:

在MyActivity.java:

public interface OnBackClickListener {
        boolean onBackClick();
    }

    private OnBackClickListener onBackClickListener;

public void setOnBackClickListener(OnBackClickListener onBackClickListener) {
        this.onBackClickListener = onBackClickListener;
    }

@Override
    public void onBackPressed() {
        if (onBackClickListener != null && onBackClickListener.onBackClick()) {
            return;
        }
        super.onBackPressed();
    }

在片段中:

((MyActivity) getActivity()).setOnBackClickListener(new MyActivity.OnBackClickListener() {
    @Override
    public boolean onBackClick() {
        if (condition) {
            return false;
        }

        // some codes

        return true;
    }
});

非常简短而甜蜜的回答:

getActivity().onBackPressed();

我案例的整个场景说明:

我在MainActivity中有FragmentA， 我从FragmentA打开FragmentB (FragmentB是FragmentA的子或嵌套片段)

 Fragment duedateFrag = new FragmentB();
 FragmentTransaction ft  = getFragmentManager().beginTransaction();
 ft.replace(R.id.container_body, duedateFrag);
 ft.addToBackStack(null);
 ft.commit();

现在如果你想从FragmentB访问FragmentA你可以简单地输入getActivity().onBackPressed();在FragmentB。

只需添加addToBackStack当你在你的片段之间过渡，如下所示:

fragmentManager.beginTransaction().replace(R.id.content_frame,fragment).addToBackStack("tag").commit();

如果你写addToBackStack(null)，它会自己处理它，但如果你给了一个标签，你应该手动处理它。

@Override
public void onResume() {
    super.onResume();

    getView().setFocusableInTouchMode(true);
    getView().requestFocus();
    getView().setOnKeyListener(new View.OnKeyListener() {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK) {
                // handle back button
                replaceFragmentToBackStack(getActivity(), WelcomeFragment.newInstance(bundle), tags);

                return true;
            }

            return false;
        }
    });
}

我只是使用findFragmentById和转换到片段，并调用处理onBackpressed的方法。这个示例显示了检查这是否是订单流程的第一步，如果弹出一个对话框片段来确认退出订单。

@Override
    public void onBackPressed() {
        //check if first fragment in wizard is loaded, if true get abandon confirmation before going back
        OrderFragment frag =(OrderFragment)getSupportFragmentManager().findFragmentById(R.id.fragContainer);
        if (frag==null || (frag!=null && frag.getOrderStage()<1)){
            AlertDialogFragment.show(getSupportFragmentManager(), R.string.dialog_cancel_order,R.string.dialog_cancel_order_msg, R.string.dialog_cancel_order_pos,R.string.dialog_order_quiz_neg, DIALOG_ID_CANCEL);
        }else {
            super.onBackPressed();
        }
    }

根据@ hammer的回答，这里是伪代码，它应该如何工作。 假设你的主活动名为BaseActivity，它有子片段(就像SlidingMenu库的例子一样)。 以下是步骤:

首先，我们需要创建接口和类，实现它的接口具有泛型方法

Create class interface OnBackPressedListener public interface OnBackPressedListener { public void doBack(); } Create class which implements skills of OnBackPressedListener public class BaseBackPressedListener implements OnBackPressedListener { private final FragmentActivity activity; public BaseBackPressedListener(FragmentActivity activity) { this.activity = activity; } @Override public void doBack() { activity.getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE); } } Since now, we will work on our code BaseActivity and its fragments Create private listener on top of your class BaseActivity protected OnBackPressedListener onBackPressedListener; create method to set listener in BaseActivity public void setOnBackPressedListener(OnBackPressedListener onBackPressedListener) { this.onBackPressedListener = onBackPressedListener; } in override onBackPressed implement something like that @Override public void onBackPressed() { if (onBackPressedListener != null) onBackPressedListener.doBack(); else super.onBackPressed(); in your fragment in onCreateView you should add our listener @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { activity = getActivity(); ((BaseActivity)activity).setOnBackPressedListener(new BaseBackPressedListener(activity)); View view = ... ; //stuff with view return view; }

瞧，现在当你在片段中单击返回时，你应该捕获你的自定义on back方法。