How to pass a variable from a activity to another, which is not the immediate activity?

Question

In android, to pass a variable from activity 1 to activity 2, intents are used. But how to pass variables from activity 1 to activity 3. In my project, I am getting a id from user in login activity, which is needed in other activity, but it is not the immediate activity to it. How to do this?

By going through the activity 2, but its little hard to pass from activity 1 to activity 2 and then to activity 3, how can I directly pass it? — theKnifer, May 09 '20 at 06:55
how about this ? https://stackoverflow.com/a/12282529/5156075 — John Joe, May 09 '20 at 06:57

score 1 · Answer 1 · answered May 09 '20 at 06:58

You can use SharedPreference

Setting values in Preference:

SharedPreferences.Editor editor = getSharedPreferences("mypref", MODE_PRIVATE).edit();
 editor.putString("name", "john");
 editor.putInt("id", 12);
 editor.apply();

Retrieve data from preference:

SharedPreferences prefs = getSharedPreferences("mypref", MODE_PRIVATE); 
String name = prefs.getString("name", "");
int idName = prefs.getInt("id", 0);

score 1 · Answer 2 · answered May 09 '20 at 07:05

Create a static variable in your Helper class,

public class Helper {
    public static int user_id;
}

Set its value in activity A:

    Helper.user_id = 309; // id you want to save.

And then access its value in Activity B:

    if(Helper.user_id != 0){
         user_id = Helper.user_id;
    }

score 1 · Answer 3 · answered May 09 '20 at 07:47

You can pass the id from one activity to another activity using the eventBus

Gradle

implementation 'org.greenrobot:eventbus:3.2.0'

Activity-1: where you need to pass id

EventBus.getDefault().post(new MessageEvent());

Activity-3 : where you need to receive id

Register eventBus

@Override
 public void onStart() {
     super.onStart();
     EventBus.getDefault().register(this);
 }

 @Override
 public void onStop() {
     super.onStop();
     EventBus.getDefault().unregister(this);
 }

Prepare subscribers

Subscribers implement event handling methods (also called “subscriber methods”) that will be called when an event is posted. These are defined with the @Subscribe annotation.

@Subscribe(threadMode = ThreadMode.MAIN)  
public void onMessageEvent(MessageEvent event) {/* Do something */};

Thank you for your solution, I will try it – theKnifer May 10 '20 at 12:27 — theKnifer, May 10 '20 at 12:27

How to pass a variable from a activity to another, which is not the immediate activity?

3 Answers3