Date Picker in Android using Jetpack Compose
In Android, a Date Picker is a widget used to select a date from the calendar. When a Date Picker is implemented in an application, the user can select a year, a month, and a day, combining to form date from a calendar-like-looking box. This data is generally needed and collected in applications that require a specific date to book a movie, travel, or hotel booking. Moreover, a Date Picker is also used in reminder or alarm-based applications.
In this article, we will show you how you could implement a Date Picker in Android using Jetpack Compose. Follow the below steps once the IDE is ready.
Step by Step Implementation
Step 1: Create a New Project in Android Studio
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. While choosing the template, select Empty Compose Activity. If you do not find this template, try upgrading the Android Studio to the latest version. We demonstrated the application in Kotlin, so make sure you select Kotlin as the primary language while creating a New Project.
Step 2: Working with the MainActivity.kt file
Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.
Kotlin
package com.w3wiki.jcdatepicker import android.app.DatePickerDialog import android.os.Bundle import android.widget.DatePicker import androidx.activity.ComponentActivity import androidx.activity.compose.setContent import androidx.compose.foundation.layout.* import androidx.compose.material.* import androidx.compose.runtime.Composable import androidx.compose.runtime.mutableStateOf import androidx.compose.runtime.remember import androidx.compose.ui.Alignment import androidx.compose.ui.Modifier import androidx.compose.ui.graphics.Color import androidx.compose.ui.platform.LocalContext import androidx.compose.ui.text.style.TextAlign import androidx.compose.ui.tooling.preview.Preview import androidx.compose.ui.unit.dp import androidx.compose.ui.unit.sp import java.util.* class MainActivity : ComponentActivity() { override fun onCreate(savedInstanceState: Bundle?) { super .onCreate(savedInstanceState) setContent { // Calling the composable function // to display element and its contents MainContent() } } } // Creating a composable // function to display Top Bar @Composable fun MainContent() { Scaffold( topBar = { TopAppBar(title = { Text( "GFG | Date Picker" , color = Color.White) }, backgroundColor = Color( 0xff0f9d58 )) }, content = { MyContent() } ) } // Creating a composable function to // create two Images and a spacer between them // Calling this function as content // in the above function @Composable fun MyContent(){ // Fetching the Local Context val mContext = LocalContext.current // Declaring integer values // for year, month and day val mYear: Int val mMonth: Int val mDay: Int // Initializing a Calendar val mCalendar = Calendar.getInstance() // Fetching current year, month and day mYear = mCalendar.get(Calendar.YEAR) mMonth = mCalendar.get(Calendar.MONTH) mDay = mCalendar.get(Calendar.DAY_OF_MONTH) mCalendar.time = Date() // Declaring a string value to // store date in string format val mDate = remember { mutableStateOf( "" ) } // Declaring DatePickerDialog and setting // initial values as current values (present year, month and day) val mDatePickerDialog = DatePickerDialog( mContext, { _: DatePicker, mYear: Int, mMonth: Int, mDayOfMonth: Int -> mDate.value = "$mDayOfMonth/${mMonth+1}/$mYear" }, mYear, mMonth, mDay ) Column(modifier = Modifier.fillMaxSize(), verticalArrangement = Arrangement.Center, horizontalAlignment = Alignment.CenterHorizontally) { // Creating a button that on // click displays/shows the DatePickerDialog Button(onClick = { mDatePickerDialog.show() }, colors = ButtonDefaults.buttonColors(backgroundColor = Color( 0XFF0F9D58 )) ) { Text(text = "Open Date Picker" , color = Color.White) } // Adding a space of 100dp height Spacer(modifier = Modifier.size( 100 .dp)) // Displaying the mDate value in the Text Text(text = "Selected Date: ${mDate.value}" , fontSize = 30 .sp, textAlign = TextAlign.Center) } } // For displaying preview in // the Android Studio IDE emulator @Preview (showBackground = true ) @Composable fun DefaultPreview() { MainContent() } |
Output:
You can see that we are successfully able to implement DatePicker. When we select a date, it is displayed as Text as shown in the below video.