How to send variables from Main activity to multiple activities in android?

Question

Iam trying to create an application that have

MainActivity
it is a login page , it contain 4 variable, when i click the login button, it goes to another activity HomeTab using an intent
Intent i = new Intent(FirstMain.this,Home_tab.class);
startActivity(i);
HomeTab - it has three Tab views.
a. Profile
b. Account
c. Settings

My problem is how to pass that 4 variables from the MainActivity to the 3 activities in the Tab

score 3 · Answer 1 · answered Jan 29 '13 at 09:38

3

You can add a Bundle as extra parameter in an intent

Bundle bundle = new Bundle();
bundle.putString("key", "peanuts");
bundle.putInteger("key2", 100);
i.putExtras(bundle);

Then to retrieve it

final Bundle parameters = this.getIntent().getExtras();
String food = parameters.getString("key");

answered Jan 29 '13 at 09:38

MLProgrammer-CiM

17,231
5
42
75

This is just for one activity which is triggered one not for multiple activities which aren't triggered yet. – uzay95 Mar 23 '13 at 11:17

score 3 · Answer 2 · answered Jan 29 '13 at 09:40

In Class 1:

i.putExtras("Variable1", "Value1");
i.putExtras("Variable2", 2);
i.putExtras("Variable3", true);
startActivity(i);

In Class 2:

String Var1 = this.getIntent().getExtras().getString("Variable1");
int Var2 = this.getIntent().getExtras().getInt("Variable2");
boolean Var3 = this.getIntent().getExtras().getBool("Variable3");

score 2 · Answer 3 · answered Jan 29 '13 at 09:37

2

You can pass them in the Intent you use to launch the HomeTab activity (see Intent).

answered Jan 29 '13 at 09:37

takecare

1,684
3
21
32

score 1 · Answer 4 · edited May 23 '17 at 12:08

1

In Login Activity send the variable via Intent

Intent i = new Intent(FirstMain.this,Home_tab.class);
i.putExtra("var1", "username");
i.putExtra("var2", "activity";
startActivity(i);

In the Home_Tab get the Intent

Intent intent = getIntent();
String id = intent.getStringExtra("var1");
String name = intent.getStringExtra("var2");

For info on shared preferences see here

edited May 23 '17 at 12:08

Community

1
1

answered Jan 29 '13 at 09:39

Raja Asthana

2,080
2
19
35

i don't want to pass data to Home_Tab Activity, it take two times to pass data. ie; first pass data from MainActivity to Home_tab Activity, then from Home_tab to three tabActivity ,I want to pass the data to 3 tabActivity directly. is there any way.... i think shared preference is the better way ..is there anyone can give an example ... – Sibin Francis Jan 29 '13 at 10:07
i don't want to pass data to Home_Tab Activity, it take two times to pass data. ie; first pass data from MainActivity to Home_tab Activity, then from Home_tab to three tabActivity ,I want to pass the data to 3 tabActivity directly.when i use two intent in the MainActivity, ie; one for redirecting to Home_tab Activity and another for passing values to one of the tabActivity then it shows error.. is there any way.... i think shared preference is the better way ..is there anyone can give an example ... – Sibin Francis Jan 29 '13 at 10:13

score 1 · Answer 5 · edited May 23 '17 at 11:52

use intent.putExtra to pass values you want

Intent i=new Intent(FirstMain.this,Home_tab.class);
i.putExtra("Profile", "profiledata");
i.putExtra("Account", "Account data");
startActivity(i)

and get those passing values in next activity

Intent intent = getIntent();
String id = intent.getStringExtra("Profile");
String name = intent.getStringExtra("Account");

Check How do I get extra data from intent on Android?

score 0 · Accepted Answer · answered Jan 29 '13 at 09:39

0

you have two options.

you can use intent.
you can use sharedpreferences.

answered Jan 29 '13 at 09:39

Sagar Maiyad

12,655
9
63
99

score 0 · Answer 7 · answered Dec 10 '13 at 20:16

If you have a number of "global" variables, you can setup a "BaseActivity" that inherits from Activity does not have a cooresponding view, and then have all your other Activities inherit from BaseActivity rather than directly from Activity.

That allows you to have public shared variables on BaseActivity that all your other activities that inherit from that can access.

Obviously be careful with this technique, it could easily be really messy and lead to globals that shouldn't be global, etc. But it is handy for cleaning up code that is duplicated across views (shared methods on BaseActivity) or passing information between views, like a loggedIn state.

How to send variables from Main activity to multiple activities in android?

7 Answers7