Android code for auto monthly mail generation

Here is an example of Android code that can be used to generate a monthly mail report:

// Import necessary libraries
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

// Create a SQLite database helper class
public class MailDatabaseHelper extends SQLiteOpenHelper {
    private static final String DATABASE_NAME = "mail_database";
    private static final int DATABASE_VERSION = 1;

    public MailDatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        // Create the table to store mail data
        db.execSQL("CREATE TABLE mail (id INTEGER PRIMARY KEY, subject TEXT, body TEXT, date TEXT)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // Upgrade the database if necessary
        db.execSQL("DROP TABLE IF EXISTS mail");
        onCreate(db);
    }
}

// Create a class to generate the monthly mail report
public class MailReportGenerator {
    private Context context;
    private MailDatabaseHelper dbHelper;

    public MailReportGenerator(Context context) {
        this.context = context;
        dbHelper = new MailDatabaseHelper(context);
    }

    public void generateMonthlyMailReport(int month, int year) {
        // Get the list of mail data for the specified month and year
        SQLiteDatabase db = dbHelper.getReadableDatabase();
        Cursor cursor = db.query("mail", new String[] {"subject", "body", "date"}, "date LIKE?", new String[] {"%" + year + "-" + month + "%"}, null, null, null);

        // Create a list to store the mail data
        List<MailData> mailDataList = new ArrayList<>();

        // Iterate through the cursor and add the mail data to the list
        while (cursor.moveToNext()) {
            MailData mailData = new MailData();
            mailData.setSubject(cursor.getString(0));
            mailData.setBody(cursor.getString(1));
            mailData.setDate(cursor.getString(2));
            mailDataList.add(mailData);
        }

        // Close the cursor and database
        cursor.close();
        db.close();

        // Generate the monthly mail report
        String report = "Monthly Mail Report for " + year + "-" + month + "\n\n";
        for (MailData mailData : mailDataList) {
            report += "Subject: " + mailData.getSubject() + "\n";
            report += "Body: " + mailData.getBody() + "\n";
            report += "Date: " + mailData.getDate() + "\n\n";
        }

        // Display the report
        Toast.makeText(context, report, Toast.LENGTH_LONG).show();
    }
}

// Create a class to represent a single mail data item
public class MailData {
    private String subject;
    private String body;
    private String date;

    public String getSubject() {
        return subject;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    public String getBody() {
        return body;
    }

    public void setBody(String body) {
        this.body = body;
    }

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }
}

// Create a main activity to generate the monthly mail report
public class MainActivity extends AppCompatActivity {
    private Button generateReportButton;
    private EditText monthEditText;
    private EditText yearEditText;
    private ListView reportListView;

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

        // Initialize the UI components
        generateReportButton = findViewById(R.id.generate_report_button);
        monthEditText = findViewById(R.id.month_edit_text);
        yearEditText = findViewById(R.id.year_edit_text);
        reportListView = findViewById(R.id.report_list_view);

        // Set the button click listener
        generateReportButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int month = Integer.parseInt(monthEditText.getText().toString());
                int year = Integer.parseInt(yearEditText.getText().toString());
                MailReportGenerator mailReportGenerator = new MailReportGenerator(MainActivity.this);
                mailReportGenerator.generateMonthlyMailReport(month, year);
            }
        });
    }
}

This code creates a SQLite database to store mail data, and a MailReportGenerator class to generate a monthly mail report. The report is generated by querying the database for mail data for the specified month and year, and then displaying the report in a toast message.

To use this code, you will need to create a SQLite database and populate it with mail data. You can then run the generateMonthlyMailReport method to generate the monthly mail report.

Note that this is just an example code, and you will need to modify it to fit your specific requirements. You may also need to add additional error handling and validation to ensure that the report is generated correctly.