error: cannot find symbol variable abc_ic_ab_back_mtrl_am_alpha

Question

I added a Fragment to my Android Studio project using New > Fragment > Fragment (Blank). As a result when I try to run, the project won't compile because it cannot resolve R.drawable.abc_ic_ab_back_mtrl_am_alpha in

toolbar.setNavigationIcon(R.drawable.abc_ic_ab_back_mtrl_am_alpha); 

Any ideas how to solve this?

It looks like I also lost access to android:buttonTint

Answer 1

The name of the resource was changed in the 23.2.0 support library.

Modify abc_ic_ab_back_mtrl_am_alpha to abc_ic_ab_back_material

Edit: In 23.2.1 the name of the component was changed back to abc_ic_ab_back_mtrl_am_alpha

Edit: In 24.0.0 the name of the component was changed to: abc_ic_ab_back_material

Answer 2

It looks like there are no images in raster format anymore because of the vector drawable implementation in the support library. So I put this vector drawable which represents the same arrow as it was in the previous version of support library. Right click on drawable folder, New -> Drawable resource file and paste this xml code:

<?xml version="1.0" encoding="utf-8"?> <vector xmlns:android="http://schemas.android.com/apk/res/android"     android:width="24dp"     android:height="24dp"     android:viewportWidth="24"     android:viewportHeight="24">      <path         android:pathData="M0 0h24v24H0z" />     <path         android:fillColor="#ffffff"         android:pathData="M20 11H7.83l5.59-5.59L12 4l-8 8 8 8 1.41-1.41L7.83 13H20v-2z" /> </vector> 

Source

For APIs <21 you will have to add these properties into gradle build file:

Gradle Plugin 2.0+

android {      defaultConfig {        vectorDrawables.useSupportLibrary = true       }    } 

Gradle Plugin 1.5

android {      defaultConfig {        generatedDensities = []     }      // This is handled for you by the 2.0+ Gradle Plugin     aaptOptions {       additionalParameters "--no-version-vectors"     }    }  

See this blog post for more information.