🧱 UI Layouts

  • activity_main.xml: This is the main input screen where users can add new doctor details. It uses a ScrollView to ensure smooth vertical scrolling on smaller screens, and a LinearLayout to arrange input fields and buttons neatly.

  • activity_listview.xml: A simple layout containing a ListView to display all stored doctor entries in a readable list format.

Both layouts are styled with custom drawable backgrounds to enhance the visual appeal.

⚙️ MainActivity

This is the heart of the app where:

  • All input fields are initialized and linked to the layout.

  • A click on the "Submit" button collects user input, creates a Doctor object, and saves it into the database.

  • After successful insertion, fields are cleared, and a toast message confirms the action.

  • The "View Doctors List" button opens another activity that shows all stored records.

🗃️ DBHelper

This class handles all database operations:

  • It creates a SQLite database named DoctorsDB.

  • When the app is run for the first time, a table named doctor is created with fields like ID, name, mobile number, etc.

  • It provides two key methods: one for inserting a new doctor and one for fetching all doctor entries from the database.

👨‍⚕️ Doctor Model Class

A simple Java class that defines the structure of a doctor object. It contains fields like ID, first name, last name, and specialization. This makes it easier to store and retrieve data in a structured way and display it as a single list item.

📋 DoctorListActivity

This activity displays all saved doctors using a ListView and an ArrayAdapter. When a user clicks "View Doctors List" from the main screen, this activity shows the complete list of entries pulled directly from the SQLite database.

🧩 How It All Comes Together

  1. The user enters doctor details in the form.

  2. When "Submit" is clicked:

    • A Doctor object is created.

    • The object is saved into the database using DBHelper.

  3. Clicking "View Doctors List" opens a new screen with all saved records listed using ListView.

🎨 UI & UX Enhancements

  • Custom background gradients and drawable styles make the UI modern and vibrant.

  • Elevation and padding give a material design feel.

  • Button states can include hover/touch animations using XML selectors.

  • The app is mobile-friendly and responsive across screen sizes.

activity_main.xml


<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/gradient_bg"
    android:fillViewport="true">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/linear_border"
        android:gravity="center"
        android:orientation="vertical"
        android:padding="20dp">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Doctors Directory"
            android:textColor="@color/white"
            android:textSize="45sp"
            android:textStyle="bold" />

        <EditText
            android:id="@+id/id"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:layout_margin="5dp"
            android:background="@drawable/edittext_background"
            android:elevation="8dp"
            android:hint="Doctor ID"
            android:inputType="number"
            android:padding="15dp"
            android:textColor="#111"
            android:textSize="18sp" />

        <EditText
            android:id="@+id/fname"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_margin="5dp"
            android:background="@drawable/edittext_background"
            android:elevation="8dp"
            android:hint="First Name"
            android:padding="15dp"
            android:textColor="#111"
            android:textSize="18sp" />

        <EditText
            android:id="@+id/lname"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_margin="5dp"
            android:background="@drawable/edittext_background"
            android:elevation="8dp"
            android:hint="Last Name"
            android:padding="15dp"
            android:textColor="#111"
            android:textSize="18sp" />

        <EditText
            android:id="@+id/mobile"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_margin="5dp"
            android:background="@drawable/edittext_background"
            android:elevation="8dp"
            android:hint="Mobile Number"
            android:inputType="phone"
            android:padding="15dp"
            android:textColor="#111"
            android:textSize="18sp" />

        <EditText
            android:id="@+id/address"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_margin="5dp"
            android:background="@drawable/edittext_background"
            android:elevation="8dp"
            android:hint="Address"
            android:padding="15dp"
            android:textColor="#111"
            android:textSize="18sp" />

        <EditText
            android:id="@+id/city"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_margin="5dp"
            android:background="@drawable/edittext_background"
            android:elevation="8dp"
            android:hint="City"
            android:padding="15dp"
            android:textColor="#111"
            android:textSize="18sp" />

        <EditText
            android:id="@+id/specialization"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_margin="5dp"
            android:background="@drawable/edittext_background"
            android:elevation="8dp"
            android:hint="Specialization"
            android:padding="15dp"
            android:textColor="#111"
            android:textSize="18sp" />

        <Button
            android:id="@+id/submit"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="15dp"
            android:background="@drawable/button_unique_background"
            android:text="Submit"
            android:textSize="20sp" />

        <Button
            android:id="@+id/viewList"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:background="@drawable/button_unique_background"
            android:text="View Doctors List"
            android:textSize="20sp"
            android:visibility="gone" />

    </LinearLayout>
</ScrollView>

activity_listview.xml 


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="20dp">

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

MainActivity


package com.tecvipul.doctorinfo;

import android.content.Intent;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    EditText id, fname, lname, mobile, address, city, specialization;
    Button submit, viewList;
    DBHelper db;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        db = new DBHelper(this);

        id = findViewById(R.id.id);
        fname = findViewById(R.id.fname);
        lname = findViewById(R.id.lname);
        mobile = findViewById(R.id.mobile);
        address = findViewById(R.id.address);
        city = findViewById(R.id.city);
        specialization = findViewById(R.id.specialization);

        submit = findViewById(R.id.submit);
        viewList = findViewById(R.id.viewList);

        submit.setOnClickListener(v -> {
            Doctor doctor = new Doctor(
                    Integer.parseInt(id.getText().toString()),
                    fname.getText().toString(),
                    lname.getText().toString(),
                    mobile.getText().toString(),
                    address.getText().toString(),
                    city.getText().toString(),
                    specialization.getText().toString()
            );

            db.insertDoctor(doctor);
            Toast.makeText(this, "Doctor Saved!", Toast.LENGTH_SHORT).show();
            id.setText("");
            fname.setText("");
            lname.setText("");
            mobile.setText("");
            address.setText("");
            city.setText("");
            specialization.setText("");
        });

        viewList.setOnClickListener(v -> {
            startActivity(new Intent(this, DoctorListActivity.class));
        });
    }
}

DBHelper.java


package com.tecvipul.doctorinfo;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import java.util.ArrayList;

public class DBHelper extends SQLiteOpenHelper {

    private static final String DB_NAME = "DoctorsDB";
    private static final int DB_VERSION = 1;

    public DBHelper(Context context) {
        super(context, DB_NAME, null, DB_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE doctor(id INTEGER PRIMARY KEY, fname TEXT, lname TEXT, mobile TEXT, address TEXT, city TEXT, specialization TEXT)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS doctor");
        onCreate(db);
    }

    public void insertDoctor(Doctor d) {
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues cv = new ContentValues();
        cv.put("id", d.id);
        cv.put("fname", d.firstName);
        cv.put("lname", d.lastName);
        cv.put("mobile", d.mobile);
        cv.put("address", d.address);
        cv.put("city", d.city);
        cv.put("specialization", d.specialization);
        db.insert("doctor", null, cv);
        db.close();
    }

    public ArrayList getAllDoctors() {
        ArrayList list = new ArrayList<>();
        SQLiteDatabase db = this.getReadableDatabase();
        Cursor c = db.rawQuery("SELECT * FROM doctor", null);

        if (c.moveToFirst()) {
            do {
                Doctor d = new Doctor(
                        c.getInt(0),
                        c.getString(1),
                        c.getString(2),
                        c.getString(3),
                        c.getString(4),
                        c.getString(5),
                        c.getString(6)
                );
                list.add(d);
            } while (c.moveToNext());
        }
        c.close();
        db.close();
        return list;
    }
}

Doctor.java


package com.tecvipul.doctorinfo;
public class Doctor {
    int id;
    String firstName, lastName, mobile, address, city, specialization;

    public Doctor(int id, String firstName, String lastName, String mobile, String address, String city, String specialization) {
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
        this.mobile = mobile;
        this.address = address;
        this.city = city;
        this.specialization = specialization;
    }

    @Override
    public String toString() {
        return id + ": " + firstName + " " + lastName + " - " + specialization;
    }
}

DoctorListActivity


package com.tecvipul.doctorinfo;

import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import androidx.appcompat.app.AppCompatActivity;

import java.util.ArrayList;

public class DoctorListActivity extends AppCompatActivity {

    ListView listView;
    DBHelper db;

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

        listView = findViewById(R.id.listView);
        db = new DBHelper(this);

        ArrayList doctors = db.getAllDoctors();
        ArrayAdapter adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, doctors);
        listView.setAdapter(adapter);
    }
}