xml - Floating Action Button could not be instantiated / Error inflating -


i've been tearing hair out; working fine ( well.. almost, wasn't floating right) , stopped shortly after added android:backgroundtint="@color/fab" minimum sdk 19.

to try , fix have:

  • updated android studio / sdk
  • invalidate caches / restart
  • rebuilt project
  • confirmed targetsdkversion 23
  • confirmed compile 'com.android.support:design:23.1.1'
  • confirmed classpath 'com.android.tools.build:gradle:1.5.0'
  • confirmed <style name="apptheme" parent="theme.appcompat.light.darkactionbar">

it's coming 5am sorry if glaringly obvious don't know else try. xml:

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/com.whereintheworld.com"     android:orientation="vertical"     android:layout_width="match_parent"     android:layout_height="match_parent">      <android.support.design.widget.coordinatorlayout         android:layout_width="match_parent"         android:layout_height="match_parent">          <linearlayout android:layout_width="match_parent"             android:layout_height="match_parent"             android:orientation="vertical">              <listview xmlns:android="http://schemas.android.com/apk/res/android"                 android:id="@+id/tracking_task_list"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content" />          </linearlayout>          <android.support.design.widget.floatingactionbutton             android:id="@+id/fab"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_margin="16dp"             android:clickable="true"             android:src="@drawable/fab_ic_add"             android:backgroundtint="@color/fab"             app:layout_anchor="@id/tracking_task_list"             app:layout_anchorgravity="bottom|right|end" />      </android.support.design.widget.coordinatorlayout>  </relativelayout>

com.android.support:appcompat-v7:21+ added support tinting widgets on devices running pre android 5.1 (api level 21). make use of make sure extend or set appcompat theme , use app:backgroundtint instead of android:backgroundtint.

example:

<android.support.design.widget.floatingactionbutton      xmlns:app="http://schemas.android.com/apk/res-auto"     android:id="@+id/fab"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_margin="16dp"     android:src="@drawable/icon"     app:backgroundtint="@color/accent"     app:borderwidth="0dp" />

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