📌 Permission কেন দরকার?

• User privacy রক্ষা করার জন্য
• Android & iOS security policy অনুসরণ করতে
• Unauthorized access বন্ধ করতে

📦 Required Library Install

npm install react-native-permissions
npm install @react-native-community/geolocation

Android & iOS আলাদা permission file ব্যবহার করে।

📁 File Based Permission Structure

src/
 └── permissions/
      ├── camera.permission.ts
      ├── location.permission.ts
      └── storage.permission.ts

📸 Camera Permission (TypeScript)

import { request, PERMISSIONS, RESULTS } from 'react-native-permissions';
import { Platform } from 'react-native';

export const requestCameraPermission = async (): Promise => {
  const permission =
    Platform.OS === 'android'
      ? PERMISSIONS.ANDROID.CAMERA
      : PERMISSIONS.IOS.CAMERA;

  const result = await request(permission);

  return result === RESULTS.GRANTED;
};

✔ Permission Granted হলে true return করবে ❌ Denied হলে false

📍 Location Permission (TypeScript)

import { request, PERMISSIONS, RESULTS } from 'react-native-permissions';
import { Platform } from 'react-native';

export const requestLocationPermission = async (): Promise => {
  const permission =
    Platform.OS === 'android'
      ? PERMISSIONS.ANDROID.ACCESS_FINE_LOCATION
      : PERMISSIONS.IOS.LOCATION_WHEN_IN_USE;

  const result = await request(permission);
  return result === RESULTS.GRANTED;
};

📍 Map, GPS, Tracking অ্যাপের জন্য এই permission জরুরি

💾 Storage Permission (TypeScript)

import { request, PERMISSIONS, RESULTS } from 'react-native-permissions';

export const requestStoragePermission = async (): Promise => {
  const result = await request(
    PERMISSIONS.ANDROID.READ_EXTERNAL_STORAGE
  );

  return result === RESULTS.GRANTED;
};

💾 Image upload, file download এর জন্য দরকার হয়

▶ Permission ব্যবহার করা (Component)

import { Button, Alert } from 'react-native';
import { requestCameraPermission } from '../permissions/camera.permission';

const openCamera = async () => {
  const allowed = await requestCameraPermission();

  if (allowed) {
    Alert.alert('Camera Opened');
  } else {
    Alert.alert('Permission Denied');
  }
};

🖥 Output Explanation

• প্রথমবার অ্যাপ চালু হলে permission popup আসবে
• Allow দিলে → Camera / Location / Storage access পাবে
• Deny দিলে → Feature কাজ করবে না