Pass data one activity to other activity

Passing data one activity to another using Intent. 

You can use intents, which are messages sent between activities. In a intent you can put all sort of data, String, int,float,double etc.

Here,  Before going to activity2, you will store a String message this way :

Intent intent = new Intent(activity2.this, activity1.class);
intent.putExtra("message", message);
startActivity(intent);

Here putExtra() method contain all type of variable. In activity2, in onCreate(), you can get the String message by retrieving a Bundle (which contains all the messages sent by the calling activity) and call getString() on it :

Bundle bundle = getIntent().getExtras();
String message = bundle.getString("message");

I am passing string value so i used getString() method if you want to pass int value then use getInt().

Then you can set the text in the TextView

TextView txtView = (TextView) findViewById(R.id.your_resource_textview);    
txtView.setText(message);

Hope this helps !