Floating Action Buttons (FABs) are an important part of modern app design. They are often used to provide quick access to primary actions within an app. In this blog post, we’ll walk through the steps to implement a FAB in an Android app.
Step 1: Add the Design Support Library To use the FAB in your app, you need to add the Design Support Library to your project. To do this, add the following code to your app’s build.gradle file:
dependencies {
implementation ‘com.android.support:design:28.0.0’
}
Step 2: Add the FAB to Your Layout To add the FAB to your layout, add the following code to your XML layout file:
<android.support.design.widget.FloatingActionButton android:id=”@+id/fab” android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:layout_gravity=”bottom|end” android:src=”@drawable/ic_add” app:elevation=”6dp” app:fabSize=”normal” />
This code creates a new FAB with an ID of fab. The android:layout_gravity attribute positions the FAB in the bottom-right corner of the screen. The android:src attribute sets the icon for the FAB. The app:elevation attribute controls the shadow depth of the FAB, while the app:fabSize attribute sets the size of the FAB.
Step 3: Handle FAB Clicks To handle clicks on the FAB, you need to add a OnClickListener to the FAB. Here’s an example code:
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Handle FAB click
}
});
In this code, we get a reference to the FAB using its ID and then add a new OnClickListener. When the FAB is clicked, the code inside the onClick method will be executed.
Step 4: Customize the FAB You can customize the FAB to match your app’s design. For example, you can change the color of the FAB using the app:backgroundTint attribute. You can also change the size of the FAB using the app:fabSize attribute.
<android.support.design.widget.FloatingActionButton android:id=”@+id/fab” android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:layout_gravity=”bottom|end” android:src=”@drawable/ic_add” app:elevation=”6dp” app:fabSize=”normal” app:backgroundTint=”@color/colorPrimary” />
In this code, we set the background color of the FAB to the app’s primary color using the app:backgroundTint attribute.
In this blog post, we’ve shown you how to implement a Floating Action Button (FAB) in an Android app. The FAB is an important part of modern app design and can help provide quick access to primary actions within an app. By following these steps, you can add a FAB to your app and customize it to match your app’s design.
