Android dasturlashda Single Activity yondashuvi nima…

Yagona Faoliyat yondashuvi shuni anglatadiki, ilovada faqat bitta Activity komponenti mavjud bo‘lib, u asosiy konteyner vazifasini bajaradi. Bu Activity ichida turli ekranlar (foydalanuvchi interfeysi) navigatsiya va ko‘rsatish Fragment yoki View yordamida amalga oshiriladi.

Afzalliklar:

Arxitekturani soddalashtirish: Kamroq Activity komponentlari hayot aylanishi va holatini boshqarishni osonlashtiradi.
Navigatsiya boshqaruvini yaxshilash: Jetpack Navigation Component yordamida Fragmentlar o‘rtasida navigatsiya grafigini qurish osonroq.
Yuklamani kamaytirish: Activity og‘ir komponent bo‘lib, uni bitta qilish tizim ishini yengillashtiradi.

Kamchiliklar:

Deep Linking bilan muammolar: Birgina Activityda deep linklarni ishlash uchun qo‘shimcha mantiq talab qilinishi mumkin.
Mas’uliyatlarni bo‘lishish aniq emas: Barcha Fragmentlar bir Activity ichida bo‘lib, katta loyihalarda modul bo‘linmasligi kod tuzilishini murakkablashtirishi mumkin.

Single Activityda Navigation Componentdan foydalanish misoli:

<!-- res/navigation/nav_graph.xml -->
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/nav_graph"
    app:startDestination="@id/mainFragment">

    <fragment
        android:id="@+id/mainFragment"
        android:name="com.example.myapp.ui.main.MainFragment"
        android:label="Asosiy Fragment">
        <action
            android:id="@+id/action_mainFragment_to_detailFragment"
            app:destination="@id/detailFragment" />
    </fragment>

    <fragment
        android:id="@+id/detailFragment"
        android:name="com.example.myapp.ui.detail.DetailFragment"
        android:label="Tafsilotlar Fragment" />
</navigation>

<!-- activity_main.xml -->
<androidx.fragment.app.FragmentContainerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/nav_host_fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:name="androidx.navigation.fragment.NavHostFragment"
    app:navGraph="@navigation/nav_graph"
    app:defaultNavHost="true"/>

// MainActivity.kt
class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        // Navigatsiya komponenti fragmentlarni almashtirishni boshqaradi
    }
}

Ushbu misolda, MainActivity NavHostFragmentni o‘z ichiga oladi, u nav_graph.xmlda belgilangan turli Fragmentlarni ko‘rsatishni boshqaradi. Fragmentlar o‘rtasidagi o'tishlar action yordamida amalga oshiriladi.

Android dasturlashda Single Activity yondashuvi nima anglatadi?