Floating Action Button in Android using Jetpack Compose - Coding

Floating Action Button is added to the android application to perform some important within the android application. These are implemented in the android application UI for some primary actions within the application. There are different types of floating action buttons such as simple, square, and extended floating action buttons. In this article, we will take a look at How to implement all different types of floating action buttons 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: Working with Color.kt file

Navigate to app>java>your app’s package name>ui.theme>Color.kt file and add the below code to it. Comments are added in the code to get to know in detail.

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.os.Bundle 
import android.widget.Chronometer 
import android.widget.Toast 
import androidx.activity.ComponentActivity 
import androidx.activity.compose.setContent 
import androidx.compose.foundation.layout.* 
import androidx.compose.material.* 
import androidx.compose.material.icons.Icons 
import androidx.compose.material.icons.filled.Add 
import androidx.compose.runtime.* 
import androidx.compose.ui.Alignment 
import androidx.compose.ui.Modifier 
import androidx.compose.ui.graphics.* 
import androidx.compose.ui.platform.LocalContext 
import androidx.compose.ui.text.TextStyle 
import androidx.compose.ui.text.font.FontFamily 
import androidx.compose.ui.text.font.FontWeight 
import androidx.compose.ui.text.input.TextFieldValue 
import androidx.compose.ui.text.style.TextAlign 
import androidx.compose.ui.unit.* 
import com.example.newcanaryproject.ui.theme.* 
import dev.shreyaspatil.easyupipayment.EasyUpiPayment 
import dev.shreyaspatil.easyupipayment.listener.PaymentStatusListener 
import dev.shreyaspatil.easyupipayment.model.PaymentApp 
import dev.shreyaspatil.easyupipayment.model.TransactionDetails 
import java.text.SimpleDateFormat 
import java.util.* 
  
class MainActivity : ComponentActivity() { 
  
    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 tile as a text 
                                    Text( 
  
                                        // on below line we are specifying 
                                        // text to display in top app bar. 
                                        text = "Floating Action Buttons in Android", 
  
                                        // 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 floating action buttons  
                        // to display our fabs. 
                        floatingActionButtons() 
                    } 
                } 
            } 
        } 
    } 
} 
  
@Composable
fun floatingActionButtons() { 
  
    val ctx = LocalContext.current 
  
    // on the below line we are creating a column. 
    Column( 
        // on below line we are adding a modifier to it 
        // and setting max size, max height and max width 
        modifier = Modifier 
            .fillMaxSize() 
            .fillMaxHeight() 
            .fillMaxWidth(), 
  
        // on below line we are adding vertical 
        // arrangement and horizontal alignment. 
        verticalArrangement = Arrangement.Center, 
        horizontalAlignment = Alignment.CenterHorizontally 
    ) { 
  
        // on below line we are creating a text 
        Text( 
            // on below line we are specifying text as 
            // Session Management in Android. 
            text = "Floating Action Buttons in Android\nJetpack Compose", 
  
            // on below line we are specifying text color. 
            color = greenColor, 
  
            // on below line we are specifying font family 
            fontFamily = FontFamily.Default, 
  
            // on below line we are adding font weight 
            // and alignment for our text 
            fontWeight = FontWeight.Bold, textAlign = TextAlign.Center 
        ) 
        // on below line adding a spacer 
        Spacer(modifier = Modifier.height(20.dp)) 
  
        // on below line we are creating  
        // a simple floating action button 
        FloatingActionButton( 
            // on below line we are adding on click for our fab 
            onClick = { 
                Toast.makeText(ctx, "Simple Floating Action Button", Toast.LENGTH_SHORT).show() 
            }, 
            // on below line we are adding  
            // background color for our button 
            backgroundColor = greenColor, 
            // on below line we are adding  
            // color for our content of fab. 
            contentColor = Color.White 
        ) { 
            // on below line we are 
            // adding icon for button. 
            Icon(Icons.Filled.Add, "") 
        } 
  
        // on below line adding a spacer 
        Spacer(modifier = Modifier.height(20.dp)) 
  
        // on below line we are creating 
        // a square floating action button 
        FloatingActionButton( 
            // on below line we are 
            // adding on click for our fab 
            onClick = { 
                Toast.makeText(ctx, "Square Floating Action Button", Toast.LENGTH_SHORT).show() 
            }, 
            // on below line we are  
            // specifying shape for our button 
            shape = RectangleShape, 
            // on below line we are 
            // adding background color. 
            backgroundColor = greenColor, 
            // on below line we are 
            // adding content color. 
            contentColor = Color.White 
        ) { 
            // on below line we are  
            // adding icon for fab. 
            Icon(Icons.Filled.Add, "") 
        } 
  
        // on below line adding a spacer 
        Spacer(modifier = Modifier.height(20.dp)) 
  
        // on below line we are creating 
        // an extended floating action button. 
        ExtendedFloatingActionButton( 
            // on below line we are setting text for our fab 
            text = { Text(text = "Extended FAB") }, 
            // on below line we are adding click listener. 
            onClick = { 
                Toast.makeText(ctx, "Extended Floating Action Button", Toast.LENGTH_SHORT).show() 
            }, 
            // on below line adding  
            // a background color. 
            backgroundColor = greenColor, 
            // on below line we are  
            // adding a content color. 
            contentColor = Color.White, 
            // on below line we are  
            // adding icon for our fab 
            icon = { Icon(Icons.Filled.Add, "") } 
        ) 
    } 
}

Now run your application to see the output of it.

Output:

Reffered: https://www.geeksforgeeks.org

Android

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Category:	Coding
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