Question

我正在使用realm-android 0.74.0和android 4.4.2 我创建了一个领域实例，用对象填充它并提交事务。我的物品保存得很好。我可以加载它们并操纵它们。但每次重新启动我的应用程序时，数据丢失

有没有人遇到同样的问题？

Answer 1

来自Realm的Christian。

您的登录按钮onClick处理程序具有以下方法：

button.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        ...
        // Delete database
        Realm.deleteRealmFile(getActivity());
        ...
    }
});

这会删除默认域文件以及您的数据。你试图通过这条线完成其他事情的地方？

Answer 2

我正在做以下

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_login, container, false);

    final Button button = (Button) rootView.findViewById(R.id.connect);
    final EditText username = (EditText) rootView.findViewById(R.id.username);
    final EditText password = (EditText) rootView.findViewById(R.id.password);

    button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            // Hide keyboard
            InputMethodManager inputManager = (InputMethodManager)
                    getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);

            inputManager.hideSoftInputFromWindow(getActivity().getCurrentFocus().getWindowToken(),
                    InputMethodManager.HIDE_NOT_ALWAYS);

            // Call user login service
            RestAdapter restAdapter = new RestAdapter.Builder()
                    .setEndpoint(getString(R.string.app_url_base))
                    .build();

            AppService service = restAdapter.create(AppService.class);

            service.login(username.getText().toString(), password.getText().toString(), new Callback<User>() {
                @Override
                public void success(User user, Response response) {

                    if (user.isSuccess()) {
                        SharedPreferences prefs = getActivity().getSharedPreferences(Const.PREFS, Context.MODE_PRIVATE);
                        SharedPreferences.Editor editor = prefs.edit();
                        Log.d(TAG, "Logged username: " + user.getUsername());
                        editor.putString(getString(R.string.pref_username), user.getUsername());
                        editor.putString(getString(R.string.pref_password), user.getPassword());
                        editor.putString(getString(R.string.pref_lastname), user.getLastname());
                        editor.putString(getString(R.string.pref_firstname), user.getFirstname());
                        editor.putString(getString(R.string.pref_md5), user.getMd5());
                        editor.commit();

                        Toast.makeText(getActivity(), getString(R.string.success_login), Toast.LENGTH_SHORT).show();

                        // Delete database
                        Realm.deleteRealmFile(getActivity());

                        // Delete log file
                        File logFile = new File(Const.LOG_FILE);
                        if (logFile.exists()) logFile.delete();

                        getActivity().getFragmentManager().beginTransaction()
                                .replace(R.id.container, TasksFragment.newInstance(2, 0))
                                .commit();

                        //((MainActivity) getActivity()).openDrawer();
                    } else {
                        Toast.makeText(getActivity(), getString(R.string.error_login), Toast.LENGTH_SHORT).show();
                    }
                }

                @Override
                public void failure(RetrofitError retrofitError) {
                    Log.d(TAG, "retrofitError:" + retrofitError.getMessage());
                    Toast.makeText(getActivity(), getString(R.string.error_login), Toast.LENGTH_SHORT).show();
                }
            });
        }
    });

    return rootView;
}

但是通过移动 Realm.deleteRealmFile（getActivity（））; 在改装之前它似乎工作正常

TasksFragment正在运行一个持久化RealmObjects

的服务

感谢您的帮助

重启应用程序时，realm-java数据丢失

2 个答案: