How to send values using Intent

Hello Viewers in following example i'll show you how to send values using Intent.

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.app.dipesh.senddatausingintent">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".SecondActivity"></activity>
    </application>

</manifest>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:padding="16dp"
    android:orientation="vertical"
    tools:context="com.app.dipesh.senddatausingintent.MainActivity">

    <EditText
        android:id="@+id/efname"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter FirstName"/>

    <EditText
        android:id="@+id/elname"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter LastName"
        android:layout_marginTop="10dp"/>

    <Button
        android:id="@+id/btnsend"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="Send Data"
        android:layout_marginTop="15dp"/>

</LinearLayout>

ActivityMain.java

package com.app.dipesh.senddatausingintent;

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.EditText;

public class MainActivity extends AppCompatActivity {

    EditText fname,lname;

    Button sendData;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //Find all views using findViewByid

        fname = (EditText) findViewById(R.id.efname);

        lname = (EditText) findViewById(R.id.elname);

        sendData = (Button) findViewById(R.id.btnsend);

        //set click listener on button.

        sendData.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                //getting both edittext values.

                String fnm = fname.getText().toString().trim();

                String lnm = lname.getText().toString().trim();

                Intent i = new Intent(getApplicationContext(),SecondActivity.class);

                i.putExtra("fname",fnm);

                i.putExtra("lname",lnm);

                startActivity(i);

            }

        });

    }

}

activity_second

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout 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:padding="16dp"

    android:orientation="vertical"

    tools:context="com.app.dipesh.senddatausingintent.SecondActivity">

    <TextView

        android:id="@+id/tvfname"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="10dp"/>

    <TextView

        android:id="@+id/tvlname"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="10dp"/>

    <Button

        android:id="@+id/btnback"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Go Back"

        android:layout_gravity="center_horizontal"

        android:layout_marginTop="15dp"/>

</LinearLayout>

secondactivity.java

package com.app.dipesh.senddatausingintent;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

public class SecondActivity extends AppCompatActivity {

    TextView fname,lname;

    Button back;

    String fnm,lnm;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_second);

        fname = (TextView) findViewById(R.id.tvfname);

        lname = (TextView) findViewById(R.id.tvlname);

        back = (Button) findViewById(R.id.btnback);

        //check intent is null or not

        if(!getIntent().getExtras().getString("fname").equals("") && !getIntent().getExtras().getString("lname").equals("")){

            //get values from intent

            fnm = getIntent().getExtras().getString("fname");

            lnm = getIntent().getExtras().getString("lname");

            fname.setText("First name : " + fnm);

            lname.setText("Last name : " + lnm);

        }else {

            Toast.makeText(getApplicationContext(),"Intent is null",Toast.LENGTH_LONG).show();

        }

        back.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                finish();

            }

        });

    }

}