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    private static double EARTH_RADIUS = 6378137.0;

    public static LatLng to4326(Wgs84 wgs84) {
        double lat = Math.toDegrees(Math.atan(Math.exp(wgs84.getY() / EARTH_RADIUS)) * 2 - Math.PI/2);
        double lng = Math.toDegrees(wgs84.getX() / EARTH_RADIUS);
        return new LatLng(lat, lng);
    }

    public static Wgs84 toWgs84(LatLng latLng) {
        double x = Math.toRadians(latLng.longitude) * EARTH_RADIUS;

rezaiyan

class SharedViewModel extends ViewModel {

public MutableLiveData<String> liveData = new MutableLiveData<>();

}

class parentFragment {

sharedVm = new ViewModelProvider(requireActivity()).get(SharedViewModel.class);

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public class BObserver<T> extends DisposableObserver<T> {

    private StateLiveData<T> liveData;

    public BObserver(StateLiveData<T> liveData) {
        this.liveData = liveData;

    }

    @Override

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import android.view.MotionEvent;
import android.view.View;


/**
 * @author ali (alirezaiyann@gmail.com)
 * @since 6/11/19 12:24 PM.
 */
public class OnTouchListener implements View.OnTouchListener {

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import android.annotation.SuppressLint
import android.view.MotionEvent
import android.view.View
import android.view.View.OnTouchListener
import java.util.*

/**
 * Detects left and right swipes across a view.
 */

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//Reference//
//https://github.com/orhanobut/logger
//https://github.com/JakeWharton/timber

// 1- Add this initializations to the oncreate method of Application class
Logger.addLogAdapter(AndroidLogAdapter())
            Timber.plant(Timber.DebugTree())

// 2- Create a snippet to detect log is a json format (I used a string extention function)
fun String.isJson(): Boolean {

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  /* packagingOptions {
        exclude 'META-INF/androidx.localbroadcastmanager_localbroadcastmanager.version'
        exclude 'META-INF/androidx.appcompat_appcompat.version'
        exclude 'META-INF/androidx.customview_customview.version'
        exclude 'META-INF/androidx.legacy_legacy-support-core-ui.version'
        exclude 'META-INF/androidx.drawerlayout_drawerlayout.version'
        exclude 'META-INF/androidx.interpolator_interpolator.version'
        exclude 'META-INF/androidx.legacy_legacy-support-core-utils.version'
        exclude 'META-INF/androidx.slidingpanelayout_slidingpanelayout.version'
        exclude 'META-INF/androidx.swiperefreshlayout_swiperefreshlayout.version'

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  fun Drawable.toBitmap(): Bitmap {
        val bitmap = if (this.intrinsicWidth <= 0 || this.intrinsicHeight <= 0) {
            Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888) // Single color bitmap will be created of 1x1 pixel
        } else {
            Bitmap.createBitmap(this.intrinsicWidth, this.intrinsicHeight, Bitmap.Config.ARGB_8888)
        }

        if (this is BitmapDrawable) {
            if (this.bitmap != null) {
                return this.bitmap

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/*
Given a collection of intervals, merge all overlapping intervals.

Example 1:

Input: [[1,3],[2,6],[8,10],[15,18]]
Output: [[1,6],[8,10],[15,18]]
Explanation: Since intervals [1,3] and [2,6] overlaps, merge them into [1,6].
Example 2:

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//Given an integer array nums,
//find the contiguous subarray (containing at least one number)
//which has the largest sum and return its sum.

class Solution {
    public int maxSubArray(int[] nums) { 
        if (nums.length == 1)
            return nums[0];

        int sum = 0;