Get Android shared preferences value in activity/normal class

Question

I have made a shared preference activity that store the user settings, now i want to get values in a activity or normal java class.please provide a solution or example i have already tried this code but failed.

public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    SharedPreferences channel=this.getSharedPreferences(strFile, Context.MODE_PRIVATE);
    strChannel=channel.getString(keyChannel,"Default").toString();
    Toast.makeText(getApplicationContext(), strChannel, Toast.LENGTH_LONG).show();
}

in this code strfile for eg. com.android.pack.ClassName is SharedPreference Activity from values to be fetched, and keyChannel is key that is same in SharedPreference Activity.

Kindly provide the solution.

do you get any errors? this does not work is that what you are saying? — Ovidiu Latcu, Sep 21 '11 at 08:47

score 80 · Accepted Answer · answered Sep 21 '11 at 08:52

80

If you have a SharedPreferenceActivity by which you have saved your values

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
String imgSett = prefs.getString(keyChannel, "");

if the value is saved in a SharedPreference in an Activity then this is the correct way to saving it.

SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = shared.edit();
editor.putString(keyChannel, email);
editor.commit();// commit is important here.

and this is how you can retrieve the values.

SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
String channel = (shared.getString(keyChannel, ""));

Also be aware that you can do so in a non-Activity class too but the only condition is that you need to pass the context of the Activity. use this context in to get the SharedPreferences.

mContext.getSharedPreferences(PREF_NAME, MODE_PRIVATE);

answered Sep 21 '11 at 08:52

Umesh

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I am not able to understand one thing that is the difference between SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE); String channel = (shared.getString(keyChannel, "")); and this SharedPreferences channel=this.getSharedPreferences(strFile, Context.MODE_PRIVATE); strChannel=channel.getString(keyChannel,"Default").toString(); kindly tell one thing what will be the value of PREF_NAME, please provide the example, may be i am giving wrong path of class. I gave String strFile="com.android.pref.PrefClass"; – Sandeep Sep 21 '11 at 09:39
1

There PRE_NAME is only a String. It could be anything eg: your application name, your name, your class name etc. There is absolutely no diff betwwen the two statements. what is your output BTW – Umesh Sep 21 '11 at 09:52
it shows blank toast, but i confused, how can new activity know which preference to be fetched. please explain what will the matching paramter by which a perticular value can be get... – Sandeep Sep 21 '11 at 09:56
1

if i putt some value in getString(key,"Default") then is give Default on Toast. – Sandeep Sep 21 '11 at 10:05
the PREF_NAME should be the same in all your Activities accross your application. It is the key that changes. SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE); this line reserves a pool of memory space inside the app memory. when you use the following line ... editor.putString(keyChannel, val); a space is created and val is stored in it, and can be identified by the variable keyChannel. – Umesh Sep 21 '11 at 10:11
can u please give me samlpe of this code, means there should be a shared pref activity and one normal activity or class, – Sandeep Sep 21 '11 at 10:18
read this.. this post has an in depth discussion on SharedPreference and PreferenceActivity... http://stackoverflow.com/questions/2614719/how-do-i-get-the-sharedpreferences-from-a-preferenceactivity-in-android – Umesh Sep 21 '11 at 10:32
Finaly i found the solution and now its working fine. i just add SharedPreferences shared = PreferenceManager.getDefaultSharedPreferences(this); String val=shared.getString("key", "defValue"); Thanks – Sandeep Sep 22 '11 at 08:02
What has been missing is the default name, since it isn't specified anywhere. "com.package.name_preferences.xml" This little bread crumb solved the problem for me. – Naidim May 14 '15 at 01:40

score 5 · Answer 2 · answered Oct 03 '15 at 21:41

I tried this code, to retrieve shared preferences from an activity, and could not get it to work:

        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
    sharedPreferences.getAll();
    Log.d("AddNewRecord", "getAll: " + sharedPreferences.getAll());
    Log.d("AddNewRecord", "Size: " + sharedPreferences.getAll().size());

Every time I tried, my preferences returned 0, even though I have 14 preferences saved by the preference activity. I finally found the answer. I added this to the preferences in the onCreate section.

getPreferenceManager().setSharedPreferencesName("defaultPreferences");

After I added this statement, my saved preferences returned as expected. I hope that this helps someone else who may experience the same issue that I did.

score 1 · Answer 3 · edited Jan 27 '15 at 17:47

This is the procedure that seems simplest to me:

SharedPreferences sp = getSharedPreferences("MySharedPrefs", MODE_PRIVATE);
SharedPreferences.Editor e = sp.edit();

    if (sp.getString("sharedString", null).equals("true")
            || sp.getString("sharedString", null) == null) {
        e.putString("sharedString", "false").commit();
        // Do something
    } else {
        // Do something else
    }

score 1 · Answer 4 · answered Aug 11 '18 at 05:08

You use uninstall the app and change the sharedPreferences name then run this application. I think it will resolve the issue.

A sample code to retrieve values from sharedPreferences you can use the following set of code,

SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
String channel = (shared.getString(keyValue, ""));

Get Android shared preferences value in activity/normal class

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