我如何使用共享preferences在Android上的片段？ [英] How do I use shared preferences in a fragment on Android?

问题描述

我有一个片段，我想Facebook的ID存储在共享preference。我不能写模式的get preference功能专用。同时，我想在另一个片段访问此共享preference。我该怎么办呢？

下面是我的code ...

  Session.openActiveSession（getActivity（），真，新Session.StatusCallback（）
{
    @覆盖
    公共无效呼叫（会话的会话，
                     SessionState会的状态，
                     例外的例外）{        如果（session.isOpened（））{
            Request.executeMeRequestAsync（会话，新Request.GraphUserCallback（）{                @覆盖
                公共无效onCompleted（GraphUser用户，响应响应）{                    如果（用户！= NULL）{
                        T =（TextView中）rootView.findViewById（R.id.textView2）;
                        P =（ProfilePictureView）rootView.findViewById（R.id.profilePictureView1）;
                        p.setProfileId（user.getId（））;
                        S = user.getName（）;
                        t.se​​tText（多个）;
                        S1 = user.getId（）;                        私人无效节省preferences（字符串键，字符串值）
                        {
                            共享preferences共享preferences = GET preferences（MODE_PRIVATE）;
                            共享preferences.Editor编辑=共享preferences.edit（）;
                            editor.putString（键，值）;
                            editor.commit（）;
                        }
 

解决方案

使用共享preferences 在片段;请看下文。

在

首先写共享preferences ：

 共享preferences preF = getActivity（）获得preferences（0）;
共享preferences.Editor EDT = pref.edit（）;
edt.putString（facebook_id，ID）;
edt.commit（）;
 

下面id是包含Facebook的ID，你已经得到了字符串，0表示private_mode。

二，读取存储在另一个共享preference 片段 Facebook的ID：

 共享preferences preF = getActivity（）获得preferences（0）;
字符串ID = pref.getString（facebook_id，空）;
 

下面是空的默认值返回，如果facebook_id为null里面共享preference 。

I have a fragment and I want to store the Facebook id in a shared preference. I can't write mode private in the get preference function. And also I want to access this shared preference in another fragment. How can I do so?

Here is my code...

Session.openActiveSession(getActivity(), true, new Session.StatusCallback()
{
    @Override
    public void call(Session session,
                     SessionState state,
                     Exception exception) {

        if (session.isOpened()) {
            Request.executeMeRequestAsync(session,new Request.GraphUserCallback() {

                @Override
                public void onCompleted(GraphUser user, Response response) {

                    if (user != null) {
                        t = (TextView)rootView.findViewById(R.id.textView2);
                        p = (ProfilePictureView)rootView.findViewById(R.id.profilePictureView1);
                        p.setProfileId(user.getId());
                        s = user.getName();
                        t.setText(s);
                        s1 = user.getId();

                        private void SavePreferences(String key,String value)
                        {
                            SharedPreferences sharedPreferences = getPreferences(MODE_PRIVATE);
                            SharedPreferences.Editor editor = sharedPreferences.edit();
                            editor.putString(key, value);
                            editor.commit();
                        }

解决方案

Use Shared Preferences inside a Fragment; see below.

First write in SharedPreferences:

SharedPreferences pref = getActivity().getPreferences(0);
SharedPreferences.Editor edt = pref.edit();
edt.putString("facebook_id", id);
edt.commit();

Here id is the string containing the Facebook id which you've got, and 0 indicates private_mode.

Second, to read the Facebook id stored in SharedPreference in another Fragment:

SharedPreferences pref = getActivity().getPreferences(0);
String id = pref.getString("facebook_id", "empty");

Here empty is the default value returned if facebook_id is null inside SharedPreference.

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