1-dars. Android ilovalari haqida ikkita asosiy tushuncha

RecyclerView uchun layout "manager"-i turini bildiruvchi app:layoutManager atributini o'rnatdik.
Va oxirida, MainActivity.java faylini o'zgartiramiz:
package com.example.android.recyclerview;

import androidx.appcompat.app.AppCompatActivity;

import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;

import java.util.ArrayList;

import java.util.List;

public class MainActivity extends AppCompatActivity {

List
programmingLanguages = new ArrayList<>();

@Override

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setInitialData();
RecyclerView recyclerView = findViewById(R.id.list);
// adapter yaratish
ProgrammingLanguageAdapter adapter = new ProgrammingLanguageAdapter(this, programmingLanguages);
// ro'yxat uchun adapterni o'rnatish
recyclerView.setAdapter(adapter);
}

private void setInitialData() {

programmingLanguages.add(new ProgrammingLanguage("Java", R.drawable.java));

programmingLanguages.add(new ProgrammingLanguage("Python", R.drawable.python));
programmingLanguages.add(new ProgrammingLanguage("JavaScript", R.drawable.java_script));
programmingLanguages.add(new ProgrammingLanguage("C++", R.drawable.c_1));
programmingLanguages.add(new ProgrammingLanguage("C#", R.drawable.c_2));
programmingLanguages.add(new ProgrammingLanguage("PHP", R.drawable.php));
programmingLanguages.add(new ProgrammingLanguage("Kotlin", R.drawable.kotlin));
}
}
Ma'lumotlar to'plami setInitialData() metodi yordamida o'rnatiladi. Bizni kodda res/drawable papkasida ProgrammingLanguage ob'ektlari uchun bir qator rasm resurslari mavjudligini ko'rish mumkin. Ya'ni, avvaldan tayyorlangan rasmlarni drawable papkasiga qo'shish kerak. Keyin yuqoridagi kod yaxshi ishlaydi(xatosiz ishlaydi).
Ro'yxatni ListView orqali ko'rsatishda bo'lgani kabi, biz avval RecyclerView elementini olamiz, adapter yaratamiz va RecyclerView uchun adapterni o'rnatamiz.
Butun ilova(project) oxir-oqibat shunday bo'ladi:

Ilovani ishga tushirib, natijani ko'ramiz:


Sizlarga beradigan ma'lumotlarim shulardan iborat edi.