Android One-time Login screen using SharedPreferences

Question

I am Wondering about One-time screens... I know, I should use something like SharedPreferences or stuff like that.

If someone has a simple solution for one-time login screen. And a little example.

My login contains: weight, name , height, age and gender (spinner)

You might want to refer to this: http://stackoverflow.com/questions/7238532/how-to-launch-activity-only-once-when-app-is-opened-for-first-time — REG1, Jun 12 '16 at 15:25
Already checked [this SO post](http://stackoverflow.com/questions/21980324/how-to-display-only-one-time-login-and-then-after-start-application-directly-in)? — Stacked, Jun 12 '16 at 15:26

Alexandre Martin · Accepted Answer · 2016-06-12T15:44:34.613

0

You can take a look at Android User info and Sign in :

Or you can use login with Facebook API.

Otherwise, I would use Shared prefs.

Create a shared prefs file

SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE);

This will create a private file for the current activity. You can use MODE_WORLD_READABLE and MODE_WORLD_WRITABLE if it fits your needs.

You can also provide a file name as the first parameter if needed :

SharedPreferences sharedPreferences = getPreferences("com.example.stackoverflow.myfile", Context.MODE_PRIVATE);

Write a shared pref

SharedPreferences.Editor editor = sharedPreferences.edit();

editor.putString("USERNAME", "test");

editor.commit();

You can put any primitive type : int, string, boolean, etc.

It is a key/value set. the key string "USERNAME" will then have a value of "test".

Read shared pref

String username = sharedPreferences.getString("USERNAME", "NO NAME");

The second parameter is a default value to use if the key "USERNAME" didn't get any value.

edited Jun 12 '16 at 15:44

answered Jun 12 '16 at 15:24

Alexandre Martin

Have you idea for the non-Facebook or google one-time login because I am a beginner in this SharedPrefences – Onhar Jun 12 '16 at 15:30
So you need to learn how to use Shared prefs or to find another solution ? – Alexandre Martin Jun 12 '16 at 15:34
Learn SharedPrefences – Onhar Jun 12 '16 at 15:35
But how does this effect to the one-time screen? – Onhar Jun 16 '16 at 17:31
I really know about storing to shared prefs but what about the "one-time screen part/code"? – Onhar Jun 16 '16 at 17:32
If shared prefs don't return default values, it means your are already connected... – Alexandre Martin Jun 22 '16 at 17:03
Does this work if you have to save data and use it on another classes?? – Onhar Jun 29 '16 at 05:50
Shared Preferences work on any classes, but you have to give a name like getSharedPreferences("myName", MODE_PRIVATE); – Alexandre Martin Jun 29 '16 at 10:22

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