1-dars. Android ilovalari haqida ikkita asosiy tushuncha

implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.2.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.2'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
implementation 'androidx.recyclerview:recyclerview:1.1.0'
}
Ya'ni,

implementation 'androidx.recyclerview:recyclerview:1.1.0' -ni qo'shdik.
Endi, build.gradle faylini o'zgartirgandan keyin, ilovani sinxronlashtirish uchun "Sync Now" havolasini bosamiz:

Endi kod yozishni boshlaymiz:

Masalan, biz hozir dasturlash tillari ro'yxatini ko'rsatuvchi dastur tuzamiz.
Ma'lumotlarni ko'rsatish va saqlash uchun ilovaga ProgrammingLanguage sinfini qo'shamiz. Shu sinfni quyidagicha o'zgartiramiz:
package com.example.android.recyclerview;

public class ProgrammingLanguage {

private String name;
private int image;

public ProgrammingLanguage(String name, int image) {

this.name = name;

this.image = image;
}

public String getName() {

return this.name;
}

public void setName(String name) {

this.name = name;
}

public int getImage() {

return this.image;
}

public void setImage(int image) {

this.image = image;
}
}
ProgrammingLanguage klassi(sinfi) dasturlash tilining nomini saqlash uchun maydonni hamda rasm resursiga "havola"-ni o'z ichiga oladi.
Endi, RecyclerView yordamida qurilmamiz ekranida ProgrammingLanguage ob'ektlarining ro'yxatini namoyish qilmoqchimiz. Buning uchun res/layout papkasiga yangi list_item.xml faylini qo'shamiz. Endi, shu faylni quyidagicha o'zgartiramiz:

xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="16dp" >


android:id="@+id/image"
android:layout_marginRight="16dp"
android:layout_marginEnd="16dp"
android:layout_width="100dp"
android:layout_height="100dp" />
android:id="@+id/name"
android:paddingTop="16dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />



Ushbu fayl bitta ProgrammingLanguage ob'ektini namoyish qilish uchun layout-ni yaratadi.