Data passing between activities through Explicit Intents (Updated with androidx package)

In order to pass any data from one Activity to another, there is a very important class provided by Android. It is Intent. There are two types of Intents: Implicit Intents and Explicit Intents. We can pass data from one Activity to another with the help of Explicit Intents.

First we create the layouts for first activity, i.e DataPassingActivity:
----------------------data_passing_activity.xml------------------------

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="#795548"
    android:padding="20dp" >

    <TextView
        android:id="@+id/textView1"
        android:layout_marginBottom="5dp"
        android:textSize="25sp"
        android:textColor="#ffffff"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="Activity 1"/>

    <EditText
        android:id="@+id/enterTextET"
        android:gravity="center"
        android:textSize="25sp"
        android:textColor="#ffffff"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>

    <Button
        android:layout_marginTop="30dp"
        android:layout_gravity="center"
        android:id="@+id/sendBTN"
        android:layout_width="match_parent"
        android:layout_height="80dp"
        android:textColor="#000000"
        android:textSize="20sp"
        android:background="#A1887F"
        android:text="Click Me to send Text." />

</LinearLayout>

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---------------------DataPassingActivity.java----------------------

package com.app.yourappname;

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

import androidx.appcompat.app.AppCompatActivity;

public class DataPassingActivity extends AppCompatActivity {

    @Override
    public void onCreate(Bundle b) {
        super.onCreate(b);
        setContentView(R.layout.data_passing_activity);

        Button sendTextBTN;
        final EditText sendTextET;
        final Intent intent = new Intent();
        intent.setClass(this, DataReceivingActivity.class);
        sendTextET = findViewById(R.id.enterTextET);
        sendTextBTN = findViewById(R.id.sendBTN);
        sendTextBTN.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                intent.putExtra("message", sendTextET.getText().toString());
                startActivity(intent);
            }
        });
    }
}

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Now we create the layout for new activity where we catch the sent data from first activity:
---------------------data_receiving_activity.xml--------------------------

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="#5D4037"
    android:padding="20dp" >

    <TextView
        android:id="@+id/textView1"
        android:layout_marginBottom="5dp"
        android:textSize="25sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:textColor="#ffffff"
        android:text="Activity 2"/>

    <TextView
        android:layout_marginTop="30dp"
        android:textSize="25sp"
        android:text="Received Text:"
        android:textColor="#ffffff"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>

    <TextView
        android:layout_marginTop="20dp"
        android:id="@+id/receivedTextTV"
        android:background="#BCAAA4"
        android:textSize="25sp"
        android:textColor="#000000"
        android:layout_width="fill_parent"
        android:layout_height="80dp"/>
</LinearLayout>

---------------------------------------------------------------

------------------------DataReceivingActivity.java---------------------

package com.app.yourappname;

import android.os.Bundle;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class DataReceivingActivity extends AppCompatActivity {

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

        String str = getIntent().getStringExtra("message");

        TextView receivedMsgTV = findViewById(R.id.receivedTextTV);
        receivedMsgTV.setText(str);
    }
}

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---------------------Declare the Activity names Manifest.xml file-------------------------

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

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

</manifest>

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