Androidda moslashtirilgan ko'rinish uchun moslashtirilgan atributlarni qanday qo'shish mumkin?

attrs.xml faylida atributlarning ta'rifi: res/values/attrs.xml fayli yaratiladi (yoki mavjud faylga qo'shiladi). Unda <declare-styleable> ni maxsus View nomi bilan belgilash va har bir maxsus atribut uchun <attr> ro'yxatini tuzish, ularning formatini (format) ko'rsatish.

<?xml version="1.0" encoding="utf-8"?>  
<resources>  
    <declare-styleable name="MyCustomView">  
        <attr name="customText" format="string"/>  
        <attr name="customColor" format="color"/>  
        <attr name="customEnabled" format="boolean"/>  
    </declare-styleable>  
</resources>  

XML loyihasida atributlardan foydalanish: Maxsus View ishlatiladigan XML loyihasida, app nomlar maydonidan foydalanib, muayyan atributlar qo'shiladi.

<com.example.MyCustomView  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"  
    xmlns:app="http://schemas.android.com/apk/res-auto"  
    app:customText="Salom Maxsus View"  
    app:customColor="@color/colorPrimary"  
    app:customEnabled="true"/>  

View kodida atributlarni o'qish: Maxsus View konstruktorida (odatda Context va AttributeSet qabul qiladigan) TypedArray va obtainStyledAttributes sinflaridan foydalanib, XMLda belgilangan atributlarning qiymatlari o'qiladi.

class MyCustomView @JvmOverloads constructor(  
    context: Context,  
    attrs: AttributeSet? = null,  
    defStyleAttr: Int = 0  
) : View(context, attrs, defStyleAttr) {  

    // Atributlarning qiymatlarini saqlash uchun o'zgaruvchilar  
    private var customText: String? = null  
    private var customColor: Int = 0  
    private var customEnabled: Boolean = false  

    init {  
        // Atributlar bilan TypedArray olish  
        val typedArray = context.obtainStyledAttributes(attrs, R.styleable.MyCustomView, defStyleAttr, 0)  

        try {  
            // Atributlarning qiymatlarini o'qish  
            customText = typedArray.getString(R.styleable.MyCustomView_customText)  
            customColor = typedArray.getColor(R.styleable.MyCustomView_customColor, 0) // Standart qiymat  
            customEnabled = typedArray.getBoolean(R.styleable.MyCustomView_customEnabled, false) // Standart qiymat  

            // Endi customText, customColor va customEnabled ni View ni sozlash uchun ishlatish mumkin  
            // Masalan:  
            // if (customEnabled) { /* ... */ }  

        } finally {  
            // Resurslarni bo'shatish uchun recycle() chaqirish muhim  
            typedArray.recycle()  
        }  
    }  

    // ... qolgan View logikasi ...  
}