ZaeemSattar

     val csvBuilder = StringBuilder()
        for (city in models) {
            csvBuilder.append(city.number)
            csvBuilder.append(",")

        }
        var csv = csvBuilder.toString()
        csv = csv.substring(0, csv.length - ",".length)

ZaeemSattar

class PhoneContactModel {

    var id: Int = 0
    var name: String = ""
    var number: String = ""
    var isSelected: Boolean = false
    var viewType: Int = 1
    var headerName = ""
}

ZaeemSattar

  <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_provider_path" />
        </provider>

ZaeemSattar

https://www.lottiefiles.com/
https://github.com/airbnb/lottie-android

ZaeemSattar

// pick single image from gallery

private fun openGalleryImages() {

        val intent = Intent(Intent.ACTION_PICK)
        intent.type = "image/*"
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), TYPE_IMAGE)
    }

// get path

ZaeemSattar

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    
    <item
        android:left="-6dp"
        android:right="-6dp"
        android:top="-3dp">
        <shape>
            <solid android:color="@android:color/transparent" />
            <stroke

ZaeemSattar

import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

public abstract class EndlessRecyclerOnScrollListener extends RecyclerView.OnScrollListener {
    public static String TAG = EndlessRecyclerOnScrollListener.class.getSimpleName();

    private int previousTotal = 0; // The total number of items in the dataset after the last load
    private boolean loading = true; // True if we are still waiting for the last set of data to load.
    private int visibleThreshold = 5; // The minimum amount of items to have below your current scroll position before loading more.
    int firstVisibleItem, visibleItemCount, totalItemCount;

ZaeemSattar

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.sooq.activities.LoginActivity">


    <android.support.design.widget.AppBarLayout

ZaeemSattar

// how to use
val timer = Timer()
        timer.schedule(RemindTask(imageList.size, pager), 0, 5000)
    

// handler
inner class RemindTask() : TimerTask() {

        private var numberOfPages = 0
        private lateinit var mViewPager: ViewPager

ZaeemSattar

/**
 * This Activity displays the screen's UI, creates a TaskFragment
 * to manage the task, and receives progress updates and results 
 * from the TaskFragment when they occur.
 */
public class MainActivity extends Activity implements TaskFragment.TaskCallbacks {

  private static final String TAG_TASK_FRAGMENT = "task_fragment";

  private TaskFragment mTaskFragment;