Using Kotlin class MainActivity2 : AppCompatActivity() , PaymentResultListener…

First of all add dependency in gradle file :- implementation 'com.google.an…

const val device_token = "device_token" const val session_id = "…

< style name = "Theme.AppCompat.Light.NoActionBar.FullScreen" …

import android.os.Handler import android.os.Looper import androidx.core.os.post…

package com.rebliss.SFA ; import android.Manifest ; import android.content.Co…

package com.example.roshan import android.Manifest import android.app.Activit…