How to Create Email Sharing App in Android Studio Work with Share Intent in Application

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Send Email using Intent - Android Studio - Java

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="10dp"
    tools:context=".MainActivity">




    <!--EditText: Input the recipient-->
    <EditText
        android:id="@+id/recipientEt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/white"
        android:hint="Recipient email(s)"
        android:inputType="textEmailAddress"
        android:padding="10dp"
        android:textColor="@color/black" />

    <!--EditText: Input the subject of email-->
    <EditText
        android:id="@+id/subjectEt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/white"
        android:hint="Subject"
        android:layout_marginTop="2dp"
        android:layout_marginBottom="2dp"
        android:inputType="text|textCapSentences"
        android:padding="10dp"
        android:textColor="@color/black" />

    <!--EditText: Input the message-->
    <EditText
        android:id="@+id/messageEt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/white"
        android:gravity="start"
        android:hint="Enter message here..."
        android:inputType="text|textCapSentences"
        android:minHeight="150dp"
        android:padding="10dp"
        android:textColor="@color/black" />

    <!--Button:   Launch existing email clients to send email-->
    <Button
        android:id="@+id/sendEmailBtn"
        style="@style/Base.Widget.AppCompat.Button.Colored"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end"
        android:text="send Email" />




</LinearLayout>

MainActivity.java

package com.usmtip.myapplication;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {



    //declare views
    EditText mRecipientEt, mSubjectEt, mMessageEt;
    Button mSendEmailBtn;



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



        //initializing views with activity_main.xml
        mRecipientEt = findViewById(R.id.recipientEt);
        mSubjectEt = findViewById(R.id.subjectEt);
        mMessageEt = findViewById(R.id.messageEt);
        mSendEmailBtn = findViewById(R.id.sendEmailBtn);

        //button click to get input and call sendEmail method
        mSendEmailBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //get input from EditTexts and save in variables
                String recipient = mRecipientEt.getText().toString().trim(); //trim will remove space before and after the text
                String subject = mSubjectEt.getText().toString().trim();
                String message = mMessageEt.getText().toString().trim();

                //method call for email intent with these inputs as parameters
                sendEmail(recipient, subject, message);

            }
        });

    }

    private void sendEmail(String recipient, String subject, String message) {
        /*ACTION_SEND action to launch an email client installed on your Android device.*/
        Intent mEmailIntent = new Intent(Intent.ACTION_SEND);
        /*To send an email you need to specify mailto: as URI using setData() method
        and data type will be to text/plain using setType() method*/
        mEmailIntent.setData(Uri.parse("mailto:"));
        mEmailIntent.setType("text/plain");
        // put recipient email in intent
        /* recipient is put as array because you may wanna send email to multiple emails
           so enter comma(,) separated emails, it will be stored in array*/
        mEmailIntent.putExtra(Intent.EXTRA_EMAIL, new String[]{recipient});
        //put subject of email
        mEmailIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
        //put message of email in intent
        mEmailIntent.putExtra(Intent.EXTRA_TEXT, message);

        try {
            //no error, so start intent
            startActivity(Intent.createChooser(mEmailIntent, "Choose an Email Client"));
        }
        catch (Exception e){
            //if anything goes wrong e.g no internet or no email client lie gmail is available
            //get and show exception message
            Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
        }





    }
}