Dynamic DatePicker in Kotlin

Android DatePicker is a user interface control which is used to select the date by day, month and year in our android application. DatePicker is used to ensure that the users will select a valid date.

In android DatePicker having two modes, first one to show the complete calendar and second one shows the dates in spinner view.

We can create a DatePicker control in two ways either manually in XML file or create it in Activity file programmatically.

First we create a new project by following the below steps:

Click on File, then New => New Project.
After that include the Kotlin support and click on next.
Select the minimum SDK as per convenience and click next button.
Then select the Empty activity => next => finish.

Modify activity_main.xml file

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

Modify strings.xml file

<resources> 
    <string name="app_name">DynamicDatePickerInKotlin</string> 
</resources> 

Create the DatePicker in MainActivity.kt file

First of all, we declare a variable datePicker to create the DatePicker widget in Kotlin file.

val datePicker = DatePicker(this)

then, we will add the datePicker in the linearLayout using

val linearLayout = findViewById(R.id.linear_layout)
        // add datePicker in LinearLayout
        linearLayout?.addView(datePicker)

We are familiar with further activities in previous articles.

package com.w3wiki.myfirstkotlinapp 
  
import androidx.appcompat.app.AppCompatActivity 
import android.os.Bundle 
import android.view.ViewGroup 
import android.widget.* 
import java.util.* 
  
class MainActivity : AppCompatActivity() { 
  
    override fun onCreate(savedInstanceState: Bundle?) { 
        super.onCreate(savedInstanceState) 
        setContentView(R.layout.activity_main) 
  
        val datePicker = DatePicker(this) 
        val layoutParams = LinearLayout.LayoutParams( 
            ViewGroup.LayoutParams.MATCH_PARENT, 
            ViewGroup.LayoutParams.MATCH_PARENT) 
        datePicker.layoutParams = layoutParams 
  
  
        val linearLayout = findViewById<LinearLayout>(R.id.linear_layout) 
        // add datePicker in LinearLayout 
        linearLayout?.addView(datePicker) 
  
        val today = Calendar.getInstance() 
        datePicker.init(today.get(Calendar.YEAR), today.get(Calendar.MONTH), 
            today.get(Calendar.DAY_OF_MONTH) 
  
        ) { view, year, month, day -> 
            val month = month + 1
            val msg = "You Selected: $day/$month/$year"
            Toast.makeText(this@MainActivity, msg, Toast.LENGTH_SHORT).show() 
  
        } 
    } 
} 

AndroidManifest.xml file

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.w3wiki.myfirstkotlinapp"> 
  
<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> 

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Tags:

#Android-Date-time #Kotlin Android #Android #Kotlin

DatePicker in Kotlin

Spinner in Kotlin

Dynamic DatePicker in Kotlin

Modify activity_main.xml file

Create the DatePicker in MainActivity.kt file

AndroidManifest.xml file

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