Kotlin - Enum Classes in Kotlin | Enum Methods | Enum Properties

Hello Friend,
              Today I am going to share about Enum class in Kotlin
 

- How to create/initialize enum classes
- methods and properties of enum classes.



Initializing enums –


Now we can easily access the color of fruits,
Enum Methods-

1. values: This method returns a list of all the constants defined within the enum class.
2. valueOf: This methods returns the enum constant defined in enum, matching the input string.  If the constant, is not present in the enum, then an IllegalArgumentException is thrown.

Enum Properties-

1. ordinal: This property stores the ordinal value of the constant, which is usually a zero-based index.
2. name: This property stores the name of the constant.

Below is the example which help us to understand the uses of Enum method and Properties.

Outputs:

Hope this will help some one.
Enjoy Coding... :)

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Kotlin - Android notification in kotlin | Android MVP in Kotlin

Hello Friends,
       Lets first tell you what is notification.

Notification is a message that is used to display some short messages outside of our main application. Even if the app is not running, notifications will still work. Notifications have the following contents: an icon, title of notification and some text content.

Now today I am going to share , how create notification in Kotlin.

Download code from here
Hope this will helps someone..
Enjoy Coding.... :)

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Kotlin Android – AlertDialog – Example

Hello Friends,
                Here is the demo Alert Dialog in Kotlin. Android AlertDialog class
                is used to display a dialog box to user with positive and negative buttons.
It Appears on top of the activity layout. You may not physically access any other
UI components of activity. It will be run on UI thread.

To Create an AlertDialog, step by step process is :

1. Create an AlertDialog Builder using the activity’s context.
2. Set message content using the builder.
3. Set Positive Button Text and Action to be taken when the button is clicked using the builder.
4. Set Negative Button Text and Action to be taken when the button is clicked using the builder.
5. Create AlertDialog from the builder.
6. You may set the title to the AlertDialog box using setTitle() method.

1. MainActivity.kt

package com.android.developer.soulutions.myapplication

import android.content.DialogInterface
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.support.v7.app.AlertDialog
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        btnShowAlert.setOnClickListener {
            // build alert dialog
            val dialogBuilder = AlertDialog.Builder(this)

            // set message of alert dialog
            dialogBuilder.setMessage("Do you want to close this  ?")
                    // if the dialog is cancelable
                    .setCancelable(false)
                    // positive button text and action
                    .setPositiveButton("OK", DialogInterface.OnClickListener { dialog, id ->
                        finish()
                    })
                    // negative button text and action
                    .setNegativeButton("Cancel", DialogInterface.OnClickListener { dialog, id ->
                        dialog.cancel()
                    })

            // create dialog box
            val alert = dialogBuilder.create()
            // set title for alert dialog box
            alert.setTitle("AlertDialogExample")
            // show alert dialog
            alert.show()
        };
    }
}
 

Download the code from here

Hope this will helps someone.
Enjoy Coding................... :)

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