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BroadcastReceiver

BroadcastReceiver អ្វីជា?

BroadcastReceiver គឺជា component ដែលតម្លើង (listen) សម្រាប់ broadcast messages (events) ពី system ឬ applications ផ្សេង។

📡 Broadcast Types

Type ពិពណ៌នា
System Broadcasts ពី Android system (Battery low, Network changed, Boot completed)
Custom Broadcasts ពី app របស់អ្នក

📱 Common System Broadcasts

  • 🔋 ACTION_BATTERY_LOW - Battery ជិតអស់
  • 🔌 ACTION_POWER_CONNECTED - ដោតថ្ម
  • 📶 CONNECTIVITY_CHANGE - Network ផ្លាស់ប្តូរ
  • ✈️ ACTION_AIRPLANE_MODE_CHANGED - Airplane mode ផ្លាស់ប្តូរ
  • 🔄 ACTION_BOOT_COMPLETED - ទូរសព្ទចាប់ផ្តើមរួច
  • 📞 ACTION_NEW_OUTGOING_CALL - ចាប់ផ្តើមហៅ
  • 📱 ACTION_SCREEN_ON/OFF - អេក្រង់បើក/បិទ

💻 បង្កើត BroadcastReceiver

Java Code
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📋 Register Receiver (2 វិធី)

1️⃣ Static Registration (នៅក្នុង Manifest)

Java Code
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2️⃣ Dynamic Registration (នៅក្នុង Code)

Java Code
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📤 ផ្ញើ Custom Broadcast

Java Code
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🎯 Local Broadcast (ក្នុង App តែមួយ)

Java Code
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⚠️ Important Notes

⚠️ Android 8.0+: Static registration មិនដំណើរការសម្រាប់ broadcasts ភាគច្រើនទេ។ ប្រើ dynamic registration!

✅ Best Practices

  1. Unregister receivers នៅពេល Activity/Service បញ្ចប់
  2. មិនត្រូវធ្វើ long operations នៅក្នុង onReceive() (max 10 វិនាទី)
  3. ប្រើ JobScheduler ឬ WorkManager សម្រាប់ background work
  4. ប្រើ LocalBroadcastManager សម្រាប់ internal app communication
មេរៀនមុន
Services & Background Tasks
មេរៀនបន្ទាប់
Permissions