FloatingActionButton with Support Library - Android Tutorial

├Źndice
  1. Introduction
  2. Using FloatingActionButton with Support Library
    1. Step 1: Add Support Library
    2. Step 2: Add FloatingActionButton to Layout
    3. Step 3: Add OnClickListener to FloatingActionButton
  3. Conclusion

Introduction

FloatingActionButton (FAB) is a popular UI component in Android app development that provides a quick action button to the user. It is a circular button that floats above the user interface and is used to trigger the primary action of the screen. The FAB was introduced in Material Design and has become a standard UI component in Android apps.

Using FloatingActionButton with Support Library

The FloatingActionButton is available in the Android Support Library, which means it can be used in apps with a minimum SDK version of 14. To use the FloatingActionButton, you need to add the Support Library to your project.

Step 1: Add Support Library

To add the Support Library to your project, add the following dependency to your app's build.gradle file:


dependencies {
    implementation 'com.android.support:design:28.0.0'
}

Step 2: Add FloatingActionButton to Layout

To add the FloatingActionButton to your layout, use the following XML code:



In the above code, we have set the ID of the FloatingActionButton to "fab". We have also set its width and height to wrap content and set its position to the bottom right of the screen. We have also set the source image to "ic_add". We have used the app:backgroundTint attribute to set the background color of the button to the colorAccent of the app's theme. We have also set the elevation and pressedTranslationZ attributes to give the button a raised appearance when pressed.

Step 3: Add OnClickListener to FloatingActionButton

To add a click listener to the FloatingActionButton, use the following code:


FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        // Perform action on click
    }
});

In the above code, we have added an OnClickListener to the FloatingActionButton with the ID "fab". When the button is clicked, the code inside the onClick() method will be executed.

Conclusion

In this tutorial, we have learned how to use the FloatingActionButton with the Android Support Library. We have added the Support Library to our project, added the FloatingActionButton to our layout, and added an OnClickListener to the button. The FloatingActionButton is a great UI component that can improve the user experience of your app.

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