title: selectableItemBackground crashing App
body: <p>i'm trying to make ImageButton using 
  <code>android:background="?attr/selectableItemBackground"</code> but my app crashed. I just following this <a href="https://stackoverflow.com/a/18537061/1533670">answer</a> and this <a href="https://stackoverflow.com/questions/19714682/android-apply-selectableitembackground-in-xml-with-support-v7">question</a>. Any idea?</p>
  
  <p>Thanks for your help.</p>
  
  <p><b>activity.xml</b></p>
  
  <pre><code>    &lt;ImageButton
      android:id="@+id/signUp"
  
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
  
      android:layout_alignLeft="@+id/signIn"
      android:layout_alignParentBottom="true"
      android:layout_marginBottom="80dp"
  
      android:background="?attr/selectableItemBackground"
  
      android:src="@drawable/sign_up"
      android:contentDescription="@string/button_sign_up"        
      /&gt;    
  </code></pre>
  
  <p><b>Log Cat</b></p>
  
  <pre><code>05-31 18:50:24.077: W/dalvikvm(28619): threadid=1: thread exiting with uncaught exception (group=0x41d0b2a0)
  05-31 18:50:24.082: E/AndroidRuntime(28619): FATAL EXCEPTION: main
  05-31 18:50:24.082: E/AndroidRuntime(28619): java.lang.RuntimeException: Unable to start activity ComponentInfo{yai.properti.tujuh.tujuh.tujuh/yai.properti.tujuh.tujuh.tujuh.WelcomeActivity}: android.view.InflateException: Binary XML file line #9: Error inflating class android.widget.ImageButton
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.app.ActivityThread.access$700(ActivityThread.java:140)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.os.Handler.dispatchMessage(Handler.java:99)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.os.Looper.loop(Looper.java:137)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.app.ActivityThread.main(ActivityThread.java:4921)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at java.lang.reflect.Method.invokeNative(Native Method)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at java.lang.reflect.Method.invoke(Method.java:511)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at dalvik.system.NativeStart.main(Native Method)
  05-31 18:50:24.082: E/AndroidRuntime(28619): Caused by: android.view.InflateException: Binary XML file line #9: Error inflating class android.widget.ImageButton
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.view.LayoutInflater.createView(LayoutInflater.java:613)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.view.LayoutInflater.onCreateView(LayoutInflater.java:660)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:316)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.app.Activity.setContentView(Activity.java:1924)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at yai.properti.tujuh.tujuh.tujuh.WelcomeActivity.onCreate(WelcomeActivity.java:19)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.app.Activity.performCreate(Activity.java:5188)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    ... 11 more
  05-31 18:50:24.082: E/AndroidRuntime(28619): Caused by: java.lang.reflect.InvocationTargetException
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at java.lang.reflect.Constructor.constructNative(Native Method)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.view.LayoutInflater.createView(LayoutInflater.java:587)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    ... 24 more
  05-31 18:50:24.082: E/AndroidRuntime(28619): Caused by: android.content.res.Resources$NotFoundException: Resource is not a Drawable (color or path): TypedValue{t=0x2/d=0x7f010015 a=-1}
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.content.res.Resources.loadDrawable(Resources.java:1925)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.view.View.&lt;init&gt;(View.java:3449)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.widget.ImageView.&lt;init&gt;(ImageView.java:114)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.widget.ImageButton.&lt;init&gt;(ImageButton.java:87)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    at android.widget.ImageButton.&lt;init&gt;(ImageButton.java:83)
  05-31 18:50:24.082: E/AndroidRuntime(28619):    ... 27 more
  </code></pre>