Android Jetpack Compose – Change the Screen Orientation Programmatically using a Button

Many times in android applications we have to programmatically change the screen orientation to perform some task. If we want to play a video in landscape mode then we have to switch to landscape mode within our android application. So we have to change screen orientation in our android application programmatically. In this article, we will take a look at How to change screen orientation programmatically using Button in android using Jetpack Compose. A sample video is given below to get an idea about what we are going to do in this article.

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: Adding a new color to the Color.kt file

Navigate to app > java > your app’s package name > ui.theme > Color.kt file and add the below code to it. 

Kotlin

package com.example.newcanaryproject.ui.theme

import androidx.compose.ui.graphics.Color

val Purple200 = Color(0xFF0F9D58)
val Purple500 = Color(0xFF0F9D58)
val Purple700 = Color(0xFF3700B3)
val Teal200 = Color(0xFF03DAC5)

// on below line we are adding different colors.
val greenColor = Color(0xFF0F9D58)

Step 3: 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.example.newcanaryproject

import android.app.Activity
import android.content.Context
import android.content.pm.ActivityInfo
import android.os.Build
import android.os.Bundle
import android.provider.Settings.*
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.annotation.RequiresApi
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.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.example.newcanaryproject.ui.theme.NewCanaryProjectTheme
import com.example.newcanaryproject.ui.theme.greenColor

class MainActivity : ComponentActivity() {

    @RequiresApi(Build.VERSION_CODES.M)

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            NewCanaryProjectTheme {
                // on below line we are specifying
                // background color for our application
                Surface(
                    // on below line we are specifying
                    // modifier and color for our app
                    modifier = Modifier.fillMaxSize(), color = MaterialTheme.colors.background
                ) {

                    // on the below line we are specifying
                    // the theme as the scaffold.
                    Scaffold(

                        // in scaffold we are
                        // specifying the top bar.
                        topBar = {

                            // inside top bar we are specifying
                            // background color.
                            TopAppBar(backgroundColor = greenColor,

                                // along with that we are specifying
                                // title for our top bar.
                                title = {

                                    // in the top bar we are specifying
                                    // title as a text
                                    Text(
                                        // on below line we are specifying
                                        // text to display in top app bar.
                                        text = "GFG",

                                        // on below line we are specifying
                                        // modifier to fill max width.
                                        modifier = Modifier.fillMaxWidth(),

                                        // on below line we are specifying
                                        // text alignment.
                                        textAlign = TextAlign.Center,

                                        // on below line we are specifying
                                        // color for our text.
                                        color = Color.White
                                    )
                                })
                        }) {
                        // on below line we are calling our
                        // method to display UI
                        screenOrientation(LocalContext.current)
                    }
                }
            }
        }
    }

}

@Composable
fun screenOrientation(
    context: Context,
) {

    // on below line creating a
    // variable for screen orientation.
    val portrait = remember {
        mutableStateOf(true)
    }
    val activity = context as Activity
    // on below line we are creating a column,
    Column(
        // on below line we are adding a modifier to it,
        modifier = Modifier
            .fillMaxSize()
            // on below line we are adding a padding.
            .padding(all = 30.dp),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.Center,
    ) {

        // on below line we are adding a text for heading.
        Text(
            // on below line we are specifying text
            text = "Welcome to Geeks for Geeks",
            // on below line we are specifying text color,
            // font size and font weight
            color = greenColor, fontSize = 20.sp, fontWeight = FontWeight.Bold
        )

        // on below line adding a spacer.
        Spacer(modifier = Modifier.height(20.dp))

        // on below line creating a button
        Button(onClick = {
            // on below line we are
            // changing screen orientation
            if (portrait.value) {
                activity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE
            } else {
                activity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
            }

            // opposite the value of isPortrait
            portrait.value = !portrait.value

        }, modifier = Modifier.width(300.dp)) {
            // on below line adding a text for our button.
            Text(text = "Change Screen Orientation", color = Color.White)
        }
    }
}

Now run your application to see the output of it.

Output: