read and write data with GSON

Question

I am struggling to find a good example on how to read and write data in my android app using GSON. Could someone please show me or point me to a good example? I am using thi

Answer 1

Save your class in SharedPrefrences using

public static void saveYourClassInSharedPref(ClassToSave ClassToSave) {
        try{
            String json = "";
            if(ClassToSave != null){
                json = new Gson().toJson(ClassToSave);
            }
            SharedPref.save(KeysSharedPrefs.ClassToSave, json);
        }catch (Exception ex){
            ex.printStackTrace();
        }

    }

    public static ClassToSave readYourClassFromSharedPref() {
        ClassToSave ClassToSave;
        try{
            String json = SharedPref.read(KeysSharedPrefs.ClassToSave, "");
            if(!json.isEmpty()){
                ClassToSave = new Gson().fromJson(json, ClassToSave.class);
                return ClassToSave;
            }
        }catch (Exception ex){
            ex.printStackTrace();
        }
        return null;
    }

where SharedPref.java

public class SharedPref {

    public static String read(String valueKey, String valueDefault) {
        SharedPreferences prefs = PreferenceManager
                .getDefaultSharedPreferences(App.context);
        return prefs.getString(valueKey, valueDefault);
    }

    public static void save(String valueKey, String value) {
        SharedPreferences prefs = PreferenceManager
                .getDefaultSharedPreferences(App.context);
        SharedPreferences.Editor edit = prefs.edit();
        edit.putString(valueKey, value);
        edit.commit();
    }
}