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Kotlin Android - WebView - Example

Kotlin Android – WebView – Example

Kotlin Android – WebView

Android AlertDialog class is used to display a web page embedded in the Android Activity. The web page could be displayed in the same Android Application, without opening a browser window.

WebView could be used in your Android Application like any other View (say TextView, Button, etc.).

To display WebView in your Android Activity

Add permission for INTERNET in…

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Kotlin Android – Alert Dialog – Example Kotlin Android - Alert Dialog Android AlertDialog class is used to display a dialog box to alert the user with positive and negative buttons.

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Kafka Streams Tutorial

Kafka Streams

Kafka Streams Tutorial : In this tutorial, we shall get you introduced to the Streams API for Apache Kafka, how Kafka Streams API has evolved, its architecture, how Streams API is used for building Kafka Applications and many more.

Kafka Streams API is a part of the open-source Apache Kafka project.

How Streams API evolved

If you are curious enough to know how Streams API has…

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Kotlin Android - Floating Label in EditText using TextInputLayout - Example

Kotlin Android – Floating Label in EditText using TextInputLayout – Example

Android – Floating Label in EditText using TextInputLayout

In Android, Floating Label / Text could be displayed when EditText is in focus using TextInputLayout. When the EditText is not in focus the hint text is displayed as hint in EditText. When user enters a value, and the focus is changed to other input field, the floating label is still displayed.

To display a Floating Text or Label when…

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Android - All support libraries must use the exact same version specification

Android – All support libraries must use the exact same version specification

Android – All com.android.support libraries must use the exact same version specification

If you have encountered a notification similar to the following

“All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 27.1.1, 27.1.0. Examples include com.android.support:animated-vector-drawable:27.1.1 and…

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Kotlin Android Snackbar - Change Text Color, Background Color, Action Button Color

Kotlin Android Snackbar – Change Text Color, Background Color, Action Button Color

Android Snackbar – Change Text Color, Background Color, Action Button Color

Snackbar’s Text Color, Background Color, Action Button Color could be changed using view.setBackgroundColor(), snack.view.snackbar_text.setTextColor() and setActionTextColor() respectively.

To change Snackbar’s Text Color snack.view.setBackgroundColor(Color.parseColor(“#FFFFFF”))

To change Snackbar’s Background Color

val…

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Kotlin Android - Snackbar - Set Action - Example

Kotlin Android – Snackbar – Set Action – Example

Android – Snackbar setAction

An action could be set to Snackbar using Snackbar.setAction() method. setAction takes View.OnClickListener as second argument and you may write your set of instructions to perform the action.

Following variants are available for setAction method.

setAction(int resId, View.OnClickListener listener)

Set the action to be displayed in this BaseTransientBottomBar.…

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Kotlin Android - Snackbar - Example

Kotlin Android – Snackbar – Example

Android Snackbar

Android Snackbar is a material design component introduced with API 22.2.0. The functionality would resemble Android Toast, but with Snackbar, Snackbar could be dismissed by user or an action listener could be setup to respond to user actions.

Snackbar when shown, is displayed at the bottom of the screen, with background color “#323232” and text color “#FFFFFF“.

Important Note:…

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Kotlin Android - TextView - Basic Example

Kotlin Android – TextView – Basic Example

Android TextView

Android TextView is an user interface element that helps to display text in an activity.

Create an Android Application, named TextViewExample, with empty activity and just run the Android Application.

“Hello World!” being displayed at the center of the Activity is a TextView.

Open activity_main.xml (layout for the MainActivity.kt) file.

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Basic walk through Android Studio IDE

Basic walk through Android Studio IDE

Android Studio IDE

In this section, we shall learn some of the Android Studio features and windows. The base of Android Studio is IntelliJ IDEA. If you have already worked with IntelliJ IDEA, then most of the Android Studio would be familiar.

Android Studio provides Menus and ToolBars to run android applications, debug android applications, modify project structure, manage Android Virtual…

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Kotlin Android - Draw SVG to Canvas - Example

Kotlin Android – Draw SVG to Canvas – Example

Android Draw SVG to Canvas

ImageView is used to display Bitmap, Drawable or such image sources.

SVG (Scalable Vector Graphics) is used to define vector-based graphics. SVG defines the graphics in XML format and when rendered the picture do not degrade in quality if they are zoomed or resized. Although it is commonly used on web, with the advantages it has, we may render and use it on Android.

In…

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Android Studio - Add External Jar to Library/Dependencies

Android Studio – Add External Jar to Library/Dependencies

Android Studio – Add External Jar to Library (Project Dependencies)

There are many external libraries available that make many specific tasks simple and easy with the APIs and Classes they provide. In this tutorial, we shall learn how to import an External Jar file to the Project Module Dependencies in Android Studio.

For the demo purpose, we shall take a jar file named svg-android-1.1.jar.

To…

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Kotlin Android - Get screen Width and Height programmatically - Example

Kotlin Android – Get screen Width and Height programmatically – Example

Android – Get screen width and height

In Android, WindowManager is available to every Activity. Through WindowManager, we can get the metrics of default display in which the activity is being shown.

To get Android screen width and height programmatically,

Create a DispalyMetrics() object.

Pass the displayMetrics object to getMetrics() method of Display class. WindowManager.defaultDisplay()…

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Kotlin Android - Draw Circle Border - Paint, Canvas - Example

Kotlin Android – Draw Circle Border – Paint, Canvas – Example

Android – Draw Circle Border

To draw a circle border to Canvas using Paint :

Initialize a Paint Object

Set AntiAlias and Dither effects to true, to get a smooth drawing effect of circle.

Set paint style to STROKE. Geometry and text drawn with this style will be stroked, respecting the stroke-related fields on the paint.

Set stroke width. Provide a float value.

Set the color.

Draw Circle using…

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Kotlin Android - Draw Shape (Rect, Oval) to Canvas - Example

Kotlin Android – Draw Shape (Rect, Oval) to Canvas – Example

Draw Shape to Canvas

Drawing to a Canvas gives you full control of drawing shapes or bitmaps than drawing on to a View object in a layout.

To draw shape onto Canvas :

Create a ShapeDrawable object with required shape.

ShapeDrawable(OvalShape()) to draw Oval Shape

ShapeDrawable(RectShape()) to draw Rectangle Shape

Set bounds to the ShapeDrawable object. shapeDrawable.setBounds( left, top, right,…