TextField is an integral UI component of a mobile app. Sometimes, you may want to restrict users to enter input data in capital letters. Let’s check how to capitalize TextField in this Jetpack Compose tutorial.
TextField composable provides a parameter named keyboardOptions where KeyboardOptions class can be used. You can control capitalization using KeyboardOptions. With KeyboardCapitalization you can capitalize characters, words, sentences, etc.
@Composable
fun TextFieldExample() {
var value by remember { mutableStateOf("") }
TextField(
value = value,
singleLine = true,
onValueChange = {
value = it
},
label = { Text("Enter text") },
keyboardOptions = KeyboardOptions(capitalization = KeyboardCapitalization.Characters),
modifier = Modifier.padding(20.dp)
)
}Now, the keyboard shows only capital letters. See the output given below.
package com.example.myapplication
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material.*
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.input.KeyboardCapitalization
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.example.myapplication.ui.theme.MyApplicationTheme
class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
MyApplicationTheme {
Surface(
color = MaterialTheme.colors.background,
modifier = Modifier.fillMaxWidth()
) {
TextFieldExample()
}
}
}
}
}
@Composable
fun TextFieldExample() {
var value by remember { mutableStateOf("") }
TextField(
value = value,
singleLine = true,
onValueChange = {
value = it
},
label = { Text("Enter text") },
keyboardOptions = KeyboardOptions(capitalization = KeyboardCapitalization.Characters),
modifier = Modifier.padding(20.dp)
)
}
@Preview(showBackground = true)
@Composable
fun DefaultPreview() {
MyApplicationTheme {
TextFieldExample()
}
}
I hope this tutorial to capitalize TextField with keyboard is helpful for you.
