Apa iku Activity lan siklus uripe?

Question

Accepted Answer

**Activity** ngewakili layar tunggal kanthi antarmuka pangguna — komponen Android fundamental. **Sikluse** (sekuens negara lan callback nalika diciptakan, ditampilkan, disembunyikan, lan dihancurkan) penting kanggo memahami kanggo ngatur sumber daya lan negara kanthi bener.

## Apa iku Activity

```text
An ACTIVITY = one screen of the app (a UI the user interacts with):
  → an app is typically several activities (a login screen, a home screen, etc.)
  → the OS manages activities and calls LIFECYCLE methods as their state changes
```

## Siklus urip Activity

```text
Key lifecycle callbacks (the OS calls these as the activity's state changes):
  onCreate()  → activity is being CREATED → initialize UI, set up (called once)
  onStart()   → becoming VISIBLE to the user
  onResume()  → now in the FOREGROUND, interactive (user can interact)
  onPause()   → losing focus (another activity coming in front) → pause/save lightly
  onStop()    → no longer VISIBLE → release resources, stop heavy work
  onDestroy() → being DESTROYED → final cleanup
→ Flow: onCreate → onStart → onResume → [running] → onPause → onStop → onDestroy
```

## Mangapa siklus urip dadi penting

```text
The activity's state changes (user navigates away, a call comes in, rotation, etc.):
  → MANAGE RESOURCES — acquire in onResume/onStart, release in onPause/onStop
    (e.g. start/stop a camera, location updates, sensors)
  → SAVE STATE — onPause/onSaveInstanceState before the activity may be destroyed
  → CONFIGURATION CHANGES (e.g. rotation) DESTROY and recreate the activity → must
    handle state restoration (a common source of bugs)
→ Mismanaging the lifecycle → leaks, crashes, lost state.
```

## Mangapa iku dadi penting

Paham Activity lan sikluse dadi fundamental kanggo pengembangan Android amarga activities minangka komponen inti lan ngatur sikluse kanthi bener penting kanggo aplikasi sing bener, mula kudu dadi pengetahuan dasar sing kudu digerti.

**Activity** (layar tunggal kanthi UI) minangka salah sawijining blok bangunan fundamental Android, lan aplikasi kasusun saka activities sing ngewakili layar beda.

Paham **siklus urip** — sekuens callback (onCreate kanggo inisialisasi, onStart/onResume nalika dadi katon lan interaktif, onPause/onStop nalika kehilangan fokus lan katon, onDestroy kanggo pembersihan) sing OS manggilake nalika negara activity berubah — penting amarga ngatur kapan kudu nindakake apa.

Paham **mangapa siklus urip dadi penting** dadi pengetahuan praktis kunci: sampeyan kudu **ngatur sumber daya kanthi bener** (nggawe sumber daya kaya kamera, update lokasi, utawa sensor nalika activity aktif lan ngluncurake nalika ora, kanggo ngindari mubazir sumber daya lan baterai), **nyimpen lan mulihake negara** (amarga activity bisa uga dihancurkan), lan utamane nangani **perubahan konfigurasi** (kaya rotasi layar, sing **nghancurake lan nggawe maneh activity** — sumber umum bug nalika negara ilang yen ora ditangani).

Salah nangani siklus urip nyebabake masalah nyata: memory leaks (nahan sumber daya nalika kempelan), crash, lan negara ilang (utamane nalika rotasi).

Amarga activities minangka komponen Android fundamental lan ngatur sikluse kanthi bener (ngatur sumber daya, nyimpen negara, nangani perubahan konfigurasi) penting kanggo mbangun aplikasi sing bener lan solid sing ora bocor, crash, utawa ilang negara, paham Activity lan sikluse minangka pengetahuan Android dasar penting — salah sawijining konsep paling penting ing pengembangan Android, perlu kanggo nulis aplikasi sing tumindak bener sak owah-owahan negara (navigasi, rotasi, gangguan) sing terus-terusan dumadi, lan sumber sering bug sing paham siklus urip sing bener bisa nyegah.