仅从一个片段中未显示该片段

Question

    public void handleChangeFragment(View view) {
        Log.e("123","123");
        Fragment selectedFragment;
        if(view == findViewById(R.id.dairy)){
            selectedFragment = new milkFragment();
            fragmentManager = getSupportFragmentManager();
            fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.fragment, selectedFragment);
            fragmentTransaction.commit();
        }else if(view == findViewById(R.id.meat)){
            selectedFragment = new meatFragment();
            fragmentManager = getSupportFragmentManager();
            fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.fragment, selectedFragment);
            fragmentTransaction.commit();
        }else if(view == findViewById(R.id.veg)){
            selectedFragment = new vegFragment();
            fragmentManager = getSupportFragmentManager();
            fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.fragment, selectedFragment);
            fragmentTransaction.commit();
        }else if(view == findViewById(R.id.orders)){
            selectedFragment = new ordersFragment();
            fragmentManager = getSupportFragmentManager();
            fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.fragment, selectedFragment);
            fragmentTransaction.commit();
        }else if(view == findViewById(R.id.you)){
            selectedFragment = new youFragment();
            fragmentManager = getSupportFragmentManager();
            fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.fragment, selectedFragment);
            fragmentTransaction.commit();
        }else if(view == findViewById(R.id.cart)){
            Log.e("23","23");
            selectedFragment = new cartFragment();
            fragmentManager = getSupportFragmentManager();
            fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.fragment, selectedFragment);
            fragmentTransaction.commit();
        } else if(view == findViewById(R.id.selected)){
            if(selectedText.getText().equals("Dairy")){
                selectedFragment = new milkFragment();
                fragmentManager = getSupportFragmentManager();
                fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.fragment, selectedFragment);
                fragmentTransaction.commit();
            }else if(selectedText.getText().equals("Meat")){
                selectedFragment = new meatFragment();
                fragmentManager = getSupportFragmentManager();
                fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.fragment, selectedFragment);
                fragmentTransaction.commit();
            }else if(selectedText.getText().equals("Vegetable")){
                selectedFragment = new vegFragment();
                fragmentManager = getSupportFragmentManager();
                fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.fragment, selectedFragment);
                fragmentTransaction.commit();
            }
        }
    }

问题是这样，当当前打开的片段是Dairy时，购物车不可点击，而其余部分则不能。它进入handleChangeFragment（），但是在进入R.id.cart的过程中却以某种方式丢失了路径。如果有人有解决方案，那么请分享。 这是活动的快照。