Ask for permission with TedPermission

Permission.kt

//Ted Permission is a great permission library to manage Runtime permission added since Android 6.0(Marshmallow)
//This example Uses RxJava 2 to get permission.
/**
 * <b>Remember this need one dependency code</b>
 * Code: implementation 'gun0912.ted:tedpermission-rx2:2.2.0' // Or later
 * Might also need: implementation 'io.reactivex.rxjava2:rxandroid:2.0.2' //Or later
 * @param c is the Context
 * @param deniedTitle is the Title when permission denied and you are showing a message that you need it
 * @param deniedMessage is the Message
 * @param doWithPermissionResult is a function that has a Boolean. If true the permission is granted
 * @param permissions are the Permission list like <code>Manifest.permission.READ_CONTACTS</code>
 * {@see https://github.com/ParkSangGwon/TedPermission}
 * <b>Remember it's not a long method it's just one line actually</b>
 */
fun askPermission(c: Context,
        rationalTitle: String,
        rationalMessage: String,
        deniedTitle: String,
        deniedMessage: String,
        doWithPermissionResult: (Boolean) -> Unit,
        vararg permissions: String
) =
TedRx2Permission.with(c)
        .setRationalTitle(rationalTitle)
        .setRationalMessage(rational)
        .setDeniedTitle(deniedTitle)
        .setDeniedMessage(deniedMessage)
        .setPermissions(*permissions)
        .request()
        .subscribe({
            doWithPermissionResult(it.isGranted)
        }, {
            System.err.println("Error in permission: ${it.message}")
          })!!

//It also checks for permission... Means if you asked then user allowed next time it will be considered as allowed
//implementation 'gun0912.ted:tedpermission-rx2:2.2.0' // Or later
//implementation 'io.reactivex.rxjava2:rxandroid:2.0.2' //Or later

//If you don't wanna use RxJava 1 or 2 to do this please refer to  https://github.com/ParkSangGwon/TedPermission for other types.

Usage.kt

private fun getPermission() {
    askPermission(this, "Need to vibrate", "We need to vibrate your device.","Vibration needed.",
            "Some cards might vibrate your device, So we need this permission. If you deny app won't function.",
            this::handlePermissionResult, Manifest.permission.VIBRATE
    ) // Vibrate is an Example ... But it doesn't need runtime asking
  //Denied and Rational Title and message are optional. If you don't set them they won't be shown to user.
}

//What is handlePermissionResult?
private fun handlePermissionResult(result: Boolean) {
    if (result) {
        //GRANTED
    } else {
        //DENIED
    }
}