PermissionManager.kt

import android.Manifest
import android.app.Activity
import android.content.pm.PackageManager
import android.os.Build
import android.support.v4.app.ActivityCompat

class PermissionManager {
    fun isStoragePermissionGranted(context: Activity): Boolean {
        return if (Build.VERSION.SDK_INT >= 23) {
            isPermissionGranted(context.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE))
        } else {
            true
        }
    }

    fun isPermissionGranted(grantResult: Int): Boolean {
        return grantResult == PackageManager.PERMISSION_GRANTED
    }

    fun askForPermission(activity: Activity) {
        ActivityCompat.requestPermissions(activity, arrayOf<String>(Manifest.permission.WRITE_EXTERNAL_STORAGE), 1)
    }
}