Mavzu: Android ilovada Service komponentasi. Reja: Kontaktlar bilan ishlash. Kontaktlar qo'shililishi. Kontent provayderni yaratish. Json bilan ishlash

android:textSize="18sp" app:layout_constraintBottom_toTopOf="@id/contactList" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" />

Kontaktlar ro'yxatini ko'rsatish uchun ListView elementidan foydalanamiz. Va MainActivity sinfida biz kontaktlarni olamiz:

• package com.example.contactsapp;
• import androidx.appcompat.app.AppCompatActivity;
• import androidx.core.app.ActivityCompat;
• import androidx.core.content.ContextCompat;
• import android.Manifest;
• import android.content.ContentResolver;
• import android.content.pm.PackageManager;
• import android.database.Cursor;
• import android.os.Bundle;

import android.provider.ContactsContract;

• import android.provider.ContactsContract;
• import android.widget.ArrayAdapter;
• import android.widget.ListView;
• import android.widget.Toast;
• import java.util.ArrayList;
• public class MainActivity extends AppCompatActivity {
• private static final int REQUEST_CODE_READ_CONTACTS=1;
• private static boolean READ_CONTACTS_GRANTED =false;
• @Override
• protected void onCreate(Bundle savedInstanceState) {
• super.onCreate(savedInstanceState);
• setContentView(R.layout.activity_main);
• // ruxsat olamiz
• int hasReadContactPermission = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS);