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ProressBar in Android using Jetpack Compose
  • Last Updated : 25 Feb, 2021

ProressBar is a material UI component in Android which is used to indicate the progress of any process such as for showing any downloading procedure, as a placeholder screen, and many more. In this article, we will take a look at the implementation of ProressBar in Android using Jetpack Compose.

Attributes

Uses

modifierto add padding to our progress Bar. 
colorto add color to our progress Bar. 
strokeWidththis attribute is used to give the width of the circular line of the progress Bar.
progressto indicate the progress of your circular progress Bar.

Step by Step Implementation

Step 1: Create a New Project

To create a new project in the Android Studio Canary Version please refer to How to Create a new Project in Android Studio Canary Version with Jetpack Compose.



Step 2: Working with the MainActivity.kt file

Navigate to the app > java > your app’s package name and open the MainActivity.kt file. Inside that file add the below code to it. Comments are added inside the code to understand the code in more detail.

Kotlin




import android.graphics.drawable.shapes.Shape
import android.media.Image
import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.foundation.*
import androidx.compose.foundation.Text
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material.*
import androidx.compose.material.Icon
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.AccountCircle
import androidx.compose.material.icons.filled.Info
import androidx.compose.material.icons.filled.Menu
import androidx.compose.material.icons.filled.Phone
import androidx.compose.runtime.*
import androidx.compose.runtime.savedinstancestate.savedInstanceState
import androidx.compose.ui.Alignment
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.platform.setContent
import androidx.compose.ui.res.imageResource
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.example.gfgapp.ui.GFGAppTheme
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.SolidColor
import androidx.compose.ui.platform.ContextAmbient
import androidx.compose.ui.platform.testTag
import androidx.compose.ui.res.colorResource
import androidx.compose.ui.semantics.SemanticsProperties.ToggleableState
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.input.*
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.TextUnit
  
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            Column {
                // in below line we are calling 
                  // a progress bar  method.
                SimpleCircularProgressComponent()
            }
        }
    }
}
  
@Preview(showBackground = true)
@Composable
fun DefaultPreview() {
    GFGAppTheme {
        SimpleCircularProgressComponent();
    }
}
  
@Composable
fun SimpleCircularProgressComponent() {
    // CircularProgressIndicator is generally used
    // at the loading screen and it indicates that
    // some progress is going on so please wait.
    Column(
        // we are using column to align our
        // imageview to center of the screen.
        modifier = Modifier.fillMaxWidth().fillMaxHeight(),
  
        // below line is used for specifying
        // vertical arrangement.
        verticalArrangement = Arrangement.Center,
  
        // below line is used for specifying
        // horizontal arrangement.
        horizontalAlignment = Alignment.CenterHorizontally,
  
        ) {
        // below line is use to display 
        // a circular progress bar.
        CircularProgressIndicator(
            // below line is use to add padding
            // to our progress bar.
            modifier = Modifier.padding(16.dp),
              
            // below line is use to add color 
            // to our progress bar.
            color = colorResource(id = R.color.purple_200),
              
            // below line is use to add stroke 
            // width to our progress bar.
            strokeWidth = Dp(value = 4F)
        )
    }
}

Now run your app and see the output of the app. 

Output:

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