Create An Android TextClock Programmatically in Kotlin

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Hello Readers! In this post, we are going to learn about how to use android textClock programmatically in kotlin in the application. We will also learn how to add textClock to linearLayout programmatically in android application.

Output

Tutorialwing Kotlin Dynamic TextClock Output Android TextClock Using Kotlin With Example

Tutorialwing Kotlin Dynamic TextClock Output

Getting Started

At first, we will create android project. Then, we will create and use textClock programmatically in kotlin file.

1. Creating New Project in Kotlin

Follow the steps below to create new project. Please ignore the steps if you have already created a new project.

Step Description
1. Open Android Studio.
2. Go to File => New => New Project. Write application name as DynamicTextClock. Then, check Include Kotlin Support and click next button.
3. Select minimum SDK you need. However, we have selected 17 as minimum SDK. Then, click next button
4. Then, select Empty Activity => click next => click finish.
5. At this point, You will get a newly created android project successfully.

Now, we will modify xml and kotlin file to use textClock dynamically.

2. Modify Values Folder

No values folders have been modified. So, we are not going to mention them here.

3. Modify Layout Folder

Open res/layout/activity_main.xml file. Then, add below code into it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
	android:id="@+id/rootContainer"
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	android:orientation="vertical">

</LinearLayout>

In activity_main.xml file, we have defined a linearLayout, with id rootContainer, that will act as container for the textClock widget created programmatically in the application.

4. Create Android TextClock Programmatically / Dynamically in Kotlin

Open app/src/main/java/com.tutorialwing.dynamictextclock/MainActivity.kt file. Then, add below code into it.

package com.tutorialwing.dynamictextclock

import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.view.ViewGroup
import android.widget.LinearLayout
import android.widget.TextClock

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val textClock = TextClock(this)
        val layoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)
        layoutParams.setMargins(40, 40, 40, 40)
        textClock.layoutParams = layoutParams

        textClock.format12Hour = "hh:mm:ss a"

        val linearLayout = findViewById<LinearLayout>(R.id.rootContainer)
        linearLayout?.addView(textClock)
    }
}

We have created textClock programmatically in kotlin file (i.e. in MainActivity.kt file) in the application. After that, we have set layout params, margins etc. in it. Then, we have set format string for 12 hour format time.

Since AndroidManifest.xml file is very important in any android application, we are also going to see the content inside this file.

AndroidManifest.xml file

Code inside src/main/AndroidManifest.xml file is –

<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.tutorialwing.dynamictextclock"
		  xmlns:android="http://schemas.android.com/apk/res/android">

	<application
		android:allowBackup="true"
		android:icon="@mipmap/ic_launcher"
		android:label="@string/app_name"
		android:roundIcon="@mipmap/ic_launcher_round"
		android:supportsRtl="true"
		android:theme="@style/AppTheme">
		<activity android:name=".MainActivity">
			<intent-filter>
				<action android:name="android.intent.action.MAIN"/>

				<category android:name="android.intent.category.LAUNCHER"/>
			</intent-filter>
		</activity>
	</application>

</manifest>

When we run the program, we will get output as shown above.

That’s end of our tutorial on Creating Android TextClock Programmatically in Kotlin.

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Greetings!
We have recently published 100+ articles on android tutorials with kotlin and java. If you need, you may visit Android Tutorial for beginners page. You can also check Kotlin Tutorial for beginners