CODEWITHSUNDEEP
androidandroid-intentandroid-activityandroid-context
Rana Osama
Rana Osama

Reputation: 1323

How to pass a parameter through all activities?

I am developing a mobile application where I need the user object to be available through all the activities and I don't want to send it using the Intent from each activity to the other.

Can anyone help me please ?

Upvotes: 0

Views: 230

Answers (3)

Amit Jayant
Amit Jayant

Reputation: 2621

Just make that object 'public static'. Then access it in other activities like:

PreviousActivity.userobj

Upvotes: 1

Balázs Édes
Balázs Édes

Reputation: 13807

If you could store it in:

I think the SharedPreferences would be much simpler to implement. Here is an example, how you could create a static function, wich you can access from all your activities:

public class UserCreator
{
    public static User getUser(Context context)
    {
        SharedPreferences prefs = context.getSharedPreferences("Name", Context.MODE_PRIVATE);

        //Check if the user is already stored, if is, then simply get the data from
        //your SharedPreference object.

        boolean isValid = prefs.getBoolean("valid", false);

        if(isValid)
        {
            String userName = prefs.getString("username", "");
            String passWord = prefs.getString("password", "");
            ...
            return new User(userName, passWord,...); 
        }
        //If not, then store data
        else
        {
            //for example show a dialog here, where the user can log in.
            //when you have the data, then:

            if(...login successful...)
            {
                SharedPreferences.Editor editor = prefs.edit();
                editor.putString("username", "someusername");
                editor.putString("password", "somepassword");
                editor.putBoolean("valid", true);
                ...
                editor.commit();
            }
            // Now, if the login was successful, then you can recall this function,
            // and it will return a valid user object.
            // if it was not, then it will show the login-dialog again.
            return getUser(context);
        }
    }
}

And then from all your activites:

User user = UserCreator.getUser(this);

Upvotes: 3

Mustafa Genç
Mustafa Genç

Reputation: 2579

Write a class which extends Application class. And put global parameters there. Those parameters will be valid in application context.

Upvotes: 1

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