Android application mail

Here's a comprehensive guide to creating an Android application for sending and receiving emails:

Prerequisites

• Android Studio (the official Integrated Development Environment (IDE) for Android app development)
• Java or Kotlin programming language
• Basic understanding of Android app development and Java/Kotlin programming

Step 1: Create a new Android project

• Open Android Studio and create a new project by selecting "Empty Activity" under the "Start a new Android Studio project" dialog.
• Choose a project name, package name, and location, and click "Next".
• Select the minimum SDK version and click "Finish".

Step 2: Add the necessary dependencies

• In the project structure, navigate to the app folder and open the build.gradle file.
• Add the following dependencies to the dependencies block:

  implementation 'com.google.android.gms:play-services-auth:19.0.0'
  implementation 'com.google.android.gms:play-services-gcm:19.0.0'
  implementation 'com.google.code.gson:gson:2.8.6'

• Sync the project by clicking on the "Sync Now" button in the top-right corner of the Android Studio window.

Step 3: Create the email sending functionality

• Create a new Java/Kotlin class (e.g., EmailSender.java) and add the following code:

  
  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;

import androidx.appcompat.app.AppCompatActivity;

public class EmailSender extends AppCompatActivity { private EditText etTo; private EditText etSubject; private EditText etMessage; private Button btnSend;

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

    etTo = findViewById(R.id.et_to);
    etSubject = findViewById(R.id.et_subject);
    etMessage = findViewById(R.id.et_message);
    btnSend = findViewById(R.id.btn_send);

    btnSend.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String to = etTo.getText().toString();
            String subject = etSubject.getText().toString();
            String message = etMessage.getText().toString();

            Intent intent = new Intent(Intent.ACTION_SEND);
            intent.setType("message/rfc822");
            intent.putExtra(Intent.EXTRA_EMAIL, new String[]{to});
            intent.putExtra(Intent.EXTRA_SUBJECT, subject);
            intent.putExtra(Intent.EXTRA_TEXT, message);

            try {
                startActivity(Intent.createChooser(intent, "Send Email"));
            } catch (android.content.ActivityNotFoundException ex) {
                Toast.makeText(EmailSender.this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
            }
        }
    });
}

}

* This code creates an `EmailSender` activity with three `EditText` fields for the recipient's email address, subject, and message. When the "Send" button is clicked, it creates an `Intent` with the email client and sends the email.

**Step 4: Create the email receiving functionality**

* Create a new Java/Kotlin class (e.g., `EmailReceiver.java`) and add the following code:
```java
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Toast;

public class EmailReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Bundle bundle = intent.getExtras();
        if (bundle!= null) {
            String message = bundle.getString("message");
            Toast.makeText(context, "Received email: " + message, Toast.LENGTH_SHORT).show();
        }
    }
}

• This code creates an EmailReceiver broadcast receiver that listens for incoming emails. When an email is received, it displays a toast message with the email message.

Step 5: Register the broadcast receiver

• In the AndroidManifest.xml file, add the following code:

  <receiver android:name=".EmailReceiver">
    <intent-filter>
        <action android:name="android.intent.action.EMAIL" />
    </intent-filter>
  </receiver>

• This code registers the EmailReceiver broadcast receiver to listen for incoming emails.

Step 6: Test the application

• Run the application on an Android device or emulator.
• Open the EmailSender activity and enter the recipient's email address, subject, and message.
• Click the "Send" button to send the email.
• Open the EmailReceiver activity to receive the email.

That's it! You have now created an Android application for sending and receiving emails.