Cant use FloatingActionButton?

Question

i have created and android project in my xml file there is a floating bar like below

<android.support.design.widget.FloatingActionButton
        android:id="@+id/btn_cart"
        android:src="@drawable/ic_shopping_cart_black_24dp"
        android:backgroundTint="@android:color/white"
        android:elevation="6dp"
        app:pressedTranslationZ="12dp"
        app:layout_anchor="@id/app_bar_layout"
        app:layout_anchorGravity="bottom|right|end"
        app:useCompatPadding="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

in my activity i have use like below

FloatingActionButton btnCart;

and in side on create

btnCart = (FloatingActionButton) findViewById(R.id.btn_cart);

when i go to that page app will crash I dont know what did I do wrong

Possible duplicate of [FloatingActionButton example with Support Library](https://stackoverflow.com/questions/30576450/floatingactionbutton-example-with-support-library) — Ege Kuzubasioglu, Dec 15 '17 at 08:12

score 1 · Answer 1 · answered Dec 15 '17 at 08:12

1

I think the error will be in this line:

android:src="@drawable/ic_shopping_cart_black_24dp"

Make ur changes in the third line of code as:

app:srcCompat="@drawable/ic_shopping_cart_black_24dp"

answered Dec 15 '17 at 08:12

Selvah

25
5

score 1 · Accepted Answer · answered Dec 15 '17 at 09:11

As per my comment remove android:backgroundTint. You can change background color in following ways:

In XML with attribute app:backgroundTint

<android.support.design.widget.FloatingActionButton
        android:id="@+id/btn_cart"
        android:src="@drawable/ic_shopping_cart_black_24dp"
        app:backgroundTint="@android:color/white"
        android:elevation="6dp"
        app:pressedTranslationZ="12dp"
        app:layout_anchor="@id/app_bar_layout"
        app:layout_anchorGravity="bottom|right|end"
        app:useCompatPadding="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

Or in java file

btnCart.setBackgroundTintList(ColorStateList.valueOf(your color in int));

Cant use FloatingActionButton?

2 Answers2