小编And*_*nee的帖子

我是 android 的初学者，我无法理解为什么我会出错。当我单击主页按钮（底部导航栏）时，我收到此错误。我正在使用共享首选项来保存我的值，但是当检索到该值时，就会出现错误。

我的活动代码：

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    getLastLocation();

    binding.bottmNav.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
            switch (menuItem.getItemId()) {
                case R.id.home1: //when i m clicking here
                    setFragment(homeFragment);
                    SharedPreferences shprefs = getSharedPreferences(prefs, MODE_PRIVATE);
                    SharedPreferences mprefs = getSharedPreferences(myprefs, MODE_PRIVATE);
                    String savedvalue = shprefs.getString("savedvalue", null);
                    String savedcountry = mprefs.getString("savedcountry", null);
                    if ((savedvalue != null && savedvalue.equals("India")) || savedcountry.equals("India")) {
                        newsModels.clear();
                        binding.bottmNav.getMenu().findItem(R.id.location).setTitle("India");
                        binding.bottmNav.getMenu().findItem(R.id.home1).setChecked(true);
                        setindianewsdata();
                        setindiashopdata();
                        setFragment(homeFragment);
                    } else if (savedvalue.equals("Usa") || savedcountry.equals("Usa")) {
                        newsModels.clear();
                        setusanewsdata();
                        setusashopdata();
                        setFragment(homeFragment);
                        binding.bottmNav.getMenu().findItem(R.id.location).setTitle("USA"); …