Time Picker in Android using Jetpack Compose
In Android, a Time Picker is a modern UI element, used in applications like Alarm and Reminders, that requires users to select a particular time for performing a particular task. It is a user interface control for selecting the time in either 24-hour format or AM/PM mode.
In this article, we will show you how you could implement a Time 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.jctimepicker import android.app.TimePickerDialog import android.os.Bundle 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.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 | Time Picker" , color = Color.White) }, backgroundColor = Color( 0xff0f9d58 )) }, content = { MyContent() } ) } // Creating a composable function // to create a Time Picker // Calling this function as content // in the above function @Composable fun MyContent(){ // Fetching local context val mContext = LocalContext.current // Declaring and initializing a calendar val mCalendar = Calendar.getInstance() val mHour = mCalendar[Calendar.HOUR_OF_DAY] val mMinute = mCalendar[Calendar.MINUTE] // Value for storing time as a string val mTime = remember { mutableStateOf( "" ) } // Creating a TimePicker dialod val mTimePickerDialog = TimePickerDialog( mContext, {_, mHour : Int, mMinute: Int -> mTime.value = "$mHour:$mMinute" }, mHour, mMinute, false ) Column(modifier = Modifier.fillMaxSize(), verticalArrangement = Arrangement.Center, horizontalAlignment = Alignment.CenterHorizontally) { // On button click, TimePicker is // displayed, user can select a time Button(onClick = { mTimePickerDialog.show() }, colors = ButtonDefaults.buttonColors(backgroundColor = Color( 0XFF0F9D58 ))) { Text(text = "Open Time Picker" , color = Color.White) } // Add a spacer of 100dp Spacer(modifier = Modifier.size( 100 .dp)) // Display selected time Text(text = "Selected Time: ${mTime.value}" , fontSize = 30 .sp) } } // For displaying preview in // the Android Studio IDE emulator @Preview (showBackground = true ) @Composable fun DefaultPreview() { MainContent() } |
Output:
In the below recording, you can see that we are able to implement a TimePicker and also display the selected time.