How to Secure Android Shared Preferences?

Question

The common location where SharedPreferences are stored in Android apps is:

/data/data//shared_prefs/
         


        

Answer 1

You need to handle Verison under API 23

 private static SharedPreferences getSharedPreferences(Context mContext) throws NullPointerException {
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            String masterKeyAlias = null;
            try {
                masterKeyAlias = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC);
                sharedPreferences = EncryptedSharedPreferences.create(
                        "secret_shared_prefs",
                        masterKeyAlias,
                        mContext,
                        EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
                        EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
                );
            } catch (GeneralSecurityException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        } else {
            sharedPreferences = mContext.getSharedPreferences(tag, Context.MODE_PRIVATE);
        }
        return sharedPreferences;
    }