android - 将导航 View 上的项目设置为从 fragment 中选择

Question

当移动到不同的 fragment 时，我希望突出显示导航菜单中的相应项目。这应该从 fragment 本身完成。 以下是 fragment 中的代码:

  saveButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            dispName = dispNameET.getText().toString();
            myRef.setText(dispName);

            //going to another fragment
            Fragment fragment = new ListFragment();
            FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.frame_layout, fragment);
            fragmentTransaction.commit();


        }
    });

在此之后，导航 View 将错误的项目突出显示。 请帮忙

Answer 1

你的代码应该是这样的

saveButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        dispName = dispNameET.getText().toString();
        myRef.setText(dispName);

        //going to another fragment
        Fragment fragment = new ListFragment();
        FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.frame_layout, fragment);
        fragmentTransaction.commit();
        NavigationView navigationView = (NavigationView) getActivity().findViewById(R.id./*id of nav bar*/);
        navigationView.setCheckedItem(R.id./*id of menu item to be highlighted*/);
    }
});