E/AndroidRuntime: FATAL EXCEPTION: main
 Process: com.mycompany.myapp, PID: 26877
 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mycompany.myapp/com.mycompany.activities.MyActivity}: android.view.InflateException: Binary XML file line #221: Error inflating class <unknown>
   ...
 Caused by: android.view.InflateException: Binary XML file line #221: Error inflating class <unknown>
    at android.view.LayoutInflater.createView(LayoutInflater.java:633)
    ...
    ...
 Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x0
    at android.content.res.Resources.getValue(Resources.java:1266)
    at android.content.res.Resources.getDrawable(Resources.java:785)
    at android.content.res.Resources.getDrawable(Resources.java:752)
    at com.google.android.gms.plus.PlusOneDummyView$zzb.getDrawable(Unknown Source)
    at com.google.android.gms.plus.PlusOneDummyView.<init>(Unknown Source)
    at com.google.android.gms.plus.internal.zzg.zza(Unknown Source)
    at com.google.android.gms.plus.PlusOneButton.zzca(Unknown Source)
    at com.google.android.gms.plus.PlusOneButton.<init>(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
    at android.view.LayoutInflater.createView(LayoutInflater.java:607)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
    at com.mycompany.MyActivity.inializeContents(MyActivity.java:37)
    ...
    ...