Fragment中监听返回键

private void onKeyListener() {
        getView().setFocusableInTouchMode(true);
        getView().requestFocus();
        getView().setOnKeyListener((v, keyCode, event) -> {
            if (event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_BACK) {
                // 监听到返回按钮点击事件
               
                return true;
            }
            return false;
        });
    }

转自：Fragment监听返回键