ActivityOne.java

package com.example.droidclass;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {
	
	EditText edSent;
	Button btnSent;
	String note;
	
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_one);
        edSent = (EditText) findViewById(R.id.editText1);
        btnSent = (Button) findViewById(R.id.button1);


      btnSent.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				note = edSent.getText().toString();
				Intent intent = new Intent(MainActivity.this, ActivityTwo.class);
				intent.putExtra("keyName", note);  // pass your values and retrieve them in the other Activity using keyName
				startActivity(intent);
			}
		});
  }
}