1. Define Intent and List Its Types

• Intent: A messaging object used to request action from another application component.
• Types of Intents:
• Explicit Intent: Targets a specific component (e.g., starting a specific activity).
• Implicit Intent: Declares a general action to perform, allowing other apps to handle it.

2. Difference Between Implicit Intent and Explicit Intent

• Explicit Intent:
• Used to start a specific activity or service.
• Example:
  ```java
  Intent intent = new Intent(this, SecondActivity.class);
  startActivity(intent);

- **Implicit Intent**:  
- Used for actions such as sending emails or opening browsers.  
- **Example**:  

java
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("http://www.google.com"));
startActivity(intent);
```

3. Define Services in Android

• Service: A component that runs in the background to perform long-running operations without a user interface.

4. Describe Service Life Cycle with its Diagram

• Service Lifecycle Methods:
• onCreate()
• onStartCommand()
• onDestroy()
• Diagram:

onCreate() → onStartCommand() → (Service Running) → onDestroy()  

5. Android AsyncTask with Example

• AsyncTask: Helps to perform background operations and publish results on the UI thread.
• Example:
  java private class DownloadTask extends AsyncTask<String, Void, String> { protected String doInBackground(String... urls) { // background work return "Download complete"; } protected void onPostExecute(String result) { Toast.makeText(context, result, Toast.LENGTH_SHORT).show(); } }

6. Use of Fragments

• Fragments: Reusable UI components that can be embedded in activities, aiding in creating flexible UIs for large screens like tablets.

7. Explain Content Provider

• Content Provider: Manages access to a structured set of data and shares data between applications.

8. Explain Different Types of Animation

• View Animation (Tween): Rotate, Scale, Translate, Alpha.
• Property Animation: More flexible, animates any property of an object.
• Drawable Animation: Frame-by-frame animation using images.

9. Explain Sensor and Types of Sensors

• Sensor: Provides data about the device’s environment.
• Types:
• Motion Sensors: Accelerometer, Gyroscope
• Environmental Sensors: Temperature, Pressure
• Position Sensors: Proximity, Magnetometer

10. Develop a Program for Providing Bluetooth Connectivity

• Example:
  java BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (bluetoothAdapter == null) { // Device doesn't support Bluetooth } else { if (!bluetoothAdapter.isEnabled()) { Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableBtIntent, 1); } }

11. Explain Different Types of Available Sensors in Android Application with Example

• Types:
• Accelerometer: Detect motion
• Gyroscope: Detect rotation
• Proximity: Detect nearby objects
• Example Code:
  java SensorManager sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE); Sensor accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

12. Write a Program to Turn ON, Get Visible, List Devices and Turn off Bluetooth with Example

• Final Example:
  java BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); // Turn ON // Make Visible // List Paired Devices // Turn OFF

13. Write a Program to Display MSBTE Location on the Map

• Java Code:
  java LatLng msbteLocation = new LatLng(19.0176, 72.8562); mMap.addMarker(new MarkerOptions().position(msbteLocation).title("MSBTE")); mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(msbteLocation, 15));

14. Develop an Application to Store Customer's Details Using SQLite Databases

• SQLite Helper Example:
  java public class DBHelper extends SQLiteOpenHelper { // Create table }

15. Write an Application to Store Student Details Using SQLite Database

• SQLite Example:
  java db.execSQL("CREATE TABLE student(rollno TEXT PRIMARY KEY, name TEXT, branch TEXT, marks INTEGER, percentage REAL)");

16. Develop an Application to Send and Receive SMS

• Send SMS Code:
  java SmsManager sms = SmsManager.getDefault(); sms.sendTextMessage("phoneNumber", null, "Hello", null, null);

17. Explain Android Security Model

• Key Security Features:
• Sandboxing
• Permissions
• App Signing

18. Enlist the Steps to Publish an Android Application

• Steps:

1. Test thoroughly
2. Create signed APK or AAB
3. Create developer account on Play Console

19. Explain Geocoding and Reverse Geocoding with a Proper Example

• Geocoding Example Code:
  ```java
  Geocoder geocoder = new Geocoder(this);
  geocoder.getFromLocationName("MSBTE Mumbai", 1);

- **Reverse Geocoding Example**:  

java
geocoder.getFromLocation(19.0176, 72.8562, 1);
```

20. Write a Program to a Map-Based Application to Display Current Location

• Example Code:
  java LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); LatLng current = new LatLng(location.getLatitude(), location.getLongitude()); mMap.addMarker(new MarkerOptions().position(current).title("You are here"));