Getting data from another activity

1. Create  MainActivity.
activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.kiran.lesson3_gettingdata.MainActivity">

    <TextView
        android:id="@+id/myaddress_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:textStyle="normal|bold"
        android:textSize="36sp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="33dp" />

    <Button
        android:text="Call Next"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="40dp"
        android:id="@+id/next_btn"
        android:onClick="callNext"
        android:layout_below="@+id/myaddress_tv"
        android:layout_centerHorizontal="true" />
</RelativeLayout>




MainActivity.java:

package com.example.kiran.lesson3_gettingdata;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private TextView mAddressTv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mAddressTv = (TextView) findViewById(R.id.myaddress_tv);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if(requestCode==200){ //from second Activity
            if(resultCode==RESULT_OK) //Success Data
            {
                String address = data.getStringExtra("myaddress");
                mAddressTv.setText(address);

            }
        }
    }

    public void callNext(View view) {
        Intent intent = new Intent(MainActivity.this, SecondActivity.class);
        startActivityForResult(intent,200);
    }
}


3. SecondActivity.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_second"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.kiran.lesson3_gettingdata.SecondActivity">

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:ems="10"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="89dp"
        android:id="@+id/address_et" />

    <Button
        android:text="Send Data"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="sendData"
        android:layout_below="@+id/address_et"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="60dp"
        android:id="@+id/send_data_btn" />

</RelativeLayout>

4 SecondActivity.java:

package com.example.kiran.lesson3_gettingdata;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;

public class SecondActivity extends AppCompatActivity {

    private EditText mAddressEt;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
       
        mAddressEt = (EditText) findViewById(R.id.address_et);
    }

    public void sendData(View view) {
        String address = mAddressEt.getText().toString();
        Intent intent = new Intent();//Create an empty intent
        intent.putExtra("myaddress", address);
        setResult(RESULT_OK,intent); //Set request_code implicitly and result_code and intent explicitly
        finish();
    }
}