android - 错误 :non static method 'edit' cannot be referenced in static context

Question

public class NavigationDrawerFragment extends Fragment {

    public static final String PREF_FILE_NAME="testpref";
    private ActionBarDrawerToggle mDrawerToggle;
    private DrawerLayout mDrawerLyout;

    private boolean mUserLearnedDrawer;
    private boolean mFromSavedInstanceState;
    public NavigationDrawerFragment() {
    // Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
}


public void setUp(DrawerLayout drawerLayout,Toolbar toolbar) {
    mDrawerLyout=drawerLayout;
    mDrawerToggle=new ActionBarDrawerToggle(getActivity(),drawerLayout,toolbar,R.string.drawer_open,R.string.drawer_close){

        @Override
        public void onDrawerOpened(View drawerView) {
            super.onDrawerOpened(drawerView);
        }

        @Override
        public void onDrawerClosed(View drawerView) {
            super.onDrawerClosed(drawerView);
        }
    };
    mDrawerLyout.setDrawerListener(mDrawerToggle);

}
 public void saveToPreferences(Context context, String preferenceName, String preferenceValue)
 {
    SharedPreferences sharedPreferences =  context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
    SharedPreferences.Editor editor=SharedPreferences.edit();
    editor.putString(preferenceName, preferenceValue);
    editor.commit();
}

所以我在线上有错误，SharedPreferences.Editor editor=SharedPreferences.edit();

Error:non static method 'edit' cannot be referenced in static context

Answer 1

尝试

SharedPreferences.Editor editor=sharedPreferences.edit();

代替

SharedPreferences.Editor editor=SharedPreferences.edit();

你不能直接SharedPreferences.edit(); .

您必须创建 SharedPreferences 的对象你已经创建了sharedPreferences所以用它来调用edit()方法。

希望对您有所帮助!