Using Intents to Pass Data Between Activities

How do I pass data between Activities in Android application?

The easiest way to do this would be to pass the session id to the signout activity in the Intent you're using to start the activity:

Intent intent = new Intent(getBaseContext(), SignoutActivity.class);
intent.putExtra("EXTRA_SESSION_ID", sessionId);
startActivity(intent);

Access that intent on next activity:

String sessionId = getIntent().getStringExtra("EXTRA_SESSION_ID");

The docs for Intents has more information (look at the section titled "Extras").

Using intents to pass data between activities

Pass the data from Activity-1 to AndroidTabRes.. as below:

At sending activity...

Intent intent = new Intent(current.this, AndroidTabRestaurantDescSearchListView.class);
intent.putExtra("keyName","value");
startActivity(intent);

At AndroidTabRes.. activity...

  String data = getIntent().getExtras().getString("keyName");

Thus you can have data at receiving activity from sending activity...

And in your AndroidTabRestaurantDescSearchListView class, do this:

String value= getIntent().getStringExtra("keyName");

Intent intent = new Intent(this, RatingDescriptionSearchActivity.class);
intent.putExtra("keyName", value);
startActivity(intent);

Then in your RatingDescriptionSearchActivity class, do this:

 String data= getIntent().getStringExtra("keyName");

How to pass data between activities forward and backward, android, kotlin

you could use startactivityforresult and set a result intent which includes the data you want to pass back
https://developer.android.com/training/basics/intents/result

Is there a way to send data between activities without using intent?

I guess you want to have a particular data available between activities. One of the methods to achieve this is by making use of the SharedPreferences.

From your first activity(RegisterOwner)

SharedPreferences mySharedPreferences = this.getSharedPreferences("MYPREFERENCENAME", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = mySharedPreferences.edit();
editor.putString("USERNAME",usernam);
editor.apply();

Once you do this the username is stored in the shared preferences. Now you have this data available throughout your app.

So from the Owner activity you can retrieve this as follows:

SharedPreferences mySharedPreferences = this.getSharedPreferences("MYPREFERENCENAME", Context.MODE_PRIVATE);
String username = mySharedPreferences.getString("USERNAME", "");

How to passing data between 3 activities (Android Studio)

In Activity 1:on click listener of insert button put this:

   Intent  i = new Intent(Activity1.this, Activity2.class);
   String name = input.gettext();
   i.putExtra("name",name);
   StartActivity(i);

above code will pass value from activity 1 to activity 2,i assume you are quite new to android development go through this link carefully to understand Intents and starting activity

Now in Activity2 get the values from intent

  String name=getIntent().getStringExtra("name");

name will have value passed from activity 1;

Now following same pattern you can pass value from activity 2 to activity 3

How do I transfer data from one activity to another in Android Studio?

Inside Activity2

You can place data inside the Intent directly or you can put them in a Bundle and then put the inside the Intent. Avoid using both for consistency.

  Intent activity3Intent = new Intent(getApplicationContext(), Activity3.class);
  //Direct Intent approach
  activity3Intent.putExtras("YOUR_STRING_KEY","YOUR_DATA");
  //OR Bundle approach
  Bundle bundle = new Bundle();
  bundle.putString("YOUR_STRING_KEY","YOUR_DATA");
  activity3Intent.putExtras(bundle);
  startActivity(activity3Intent);

Inside the Activity3 class.

//if direct intent approach
String value = getIntent.getStringExtra("YOUR_STRING_KEY") 
//If bundle approach was used.
String value = getIntent().getExtras().getString("YOUR_STRING_KEY");

How to pass an object from one activity to another on Android

One option could be letting your custom class implement the Serializable interface and then you can pass object instances in the intent extra using the putExtra(Serializable..) variant of the Intent#putExtra() method.

Actual Code:

In Your Custom Model/Object Class:

public class YourClass implements Serializable {

At other class where using the Custom Model/Class:

//To pass:
intent.putExtra("KEY_NAME", myObject);

myObject is of type "YourClass".
Then to retrieve from another activity, use getSerializableExtra
get the object using same Key name. And typecast to YourClass is needed:

// To retrieve object in second Activity
myObject = (YourClass) getIntent().getSerializableExtra("KEY_NAME");

Note: Make sure each nested class of your main custom class has implemented Serializable interface to avoid any serialization exceptions. For example:

class MainClass implements Serializable {
    
    public MainClass() {}

    public static class ChildClass implements Serializable {
         
        public ChildClass() {}
    }
}