How to change Text to Bold in Android Jetpack Compose?

Android Compose – Change Text to Bold

To change font weight of Text composable to Bold, in Android Jetpack Compose, pass FontWeight.Bold for the optional fontWeight parameter of Text composable.

The following is a sample code snippet to set the font weight to bold.

import androidx.compose.ui.text.font.FontWeight

Text(
	"Hello World",
	fontWeight = FontWeight.Bold
)

Make sure to import FontWeight class.

Example

Create an Android Application with Jetpack Compose as template, and modify MainActivity.kt as shown in the following.

The Text composable in the following activity displays Hello World text in Bold font weight.

MainActivity.kt

package com.example.myapplication

import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.material.Text
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.font.FontWeight
import com.example.myapplication.ui.theme.MyApplicationTheme

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            MyApplicationTheme {
                Column(
                    horizontalAlignment = Alignment.CenterHorizontally,
                    modifier = Modifier.fillMaxWidth()
                ) {
                    Text(
                        "Hello World",
                        fontWeight = FontWeight.Bold
                    )
                }
            }
        }
    }
}

Screenshot in Emulator

Let us define two Text composables, with normal text and bold text respectively.

MainActivity.kt

package com.example.myapplication

import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.material.Text
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.font.FontWeight
import com.example.myapplication.ui.theme.MyApplicationTheme

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            MyApplicationTheme {
                Column(
                    horizontalAlignment = Alignment.CenterHorizontally,
                    modifier = Modifier.fillMaxWidth()
                ) {
                    Text(
                        "Hello World"
                    )
                    Text(
                        "Hello World",
                        fontWeight = FontWeight.Bold
                    )
                }
            }
        }
    }
}

Screenshot in Emulator

Conclusion

In this Android Jetpack Compose Tutorial, we learned how to change font weight of Text composable to Bold in Android Project with Jetpack Compose.