Is there a native component for the Floating action button in Android Material Design?

问题

My question revolves around the Floating action button that was introduced in Android Material Design.

There are many library offering this component on GitHub as:

1. Android-floating-action-button
2. FloatingActionButton
3. CircularFloatingActionMenu
4. Fab
5. Floating-action-button

But my question is:

Is there a native component with the last release of android.support.vX that was built for Floating action button?

Components such as :

• android.support.v7.cardview
• android.support.v4.widget.DrawerLayout
• android.support.v7.widget.RecyclerView
• ...

回答1:

Today (29/05/2015) it is officially avaiable with the new Material Design support Library.

Just add this dependency to your build.gradle

compile 'com.android.support:design:22.2.0'

Add this view to your layout:

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="end|bottom"
    android:src="@drawable/ic_done" />

And use it:

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

回答2:

Not yet, there have been hints that we will see it in the next support lib.

回答3:

You can use the class md-fab on a md-button then add a span with something like a plus sign inside of the md-button. Also there are other md-fab classes like md-fab-bottom-right which might help you out. Also you can use an md-icon inside your md-button

<md-button class="md-fab"><span class="glyphicon glyphicon-plus" /></md-button>

回答4:

All the above answers are now out of date.

FABS are available as part of Material Components for Android: https://material.io/develop/android/docs/getting-started/

Here is the class: https://developer.android.com/reference/com/google/android/material/floatingactionbutton/FloatingActionButton

Don't miss the Catalog app with working examples: https://github.com/material-components/material-components-android

来源：https://stackoverflow.com/questions/30483210/is-there-a-native-component-for-the-floating-action-button-in-android-material-d