Why ?attr/colorAccent dose not work below lollipop version?
<p>I have added themes to my application. For this I have used multiple accent colors  to add on image button. I have a xml file named fab selector xml , which gives shape and color to image button. But its giving exceptions on this file.</p>

<p>1st exception is inflateException for class image button. 
2nd is resource not found Exception for fab selector. Fab selector resides in drawable folder.</p>

<p>Its also  showing ,, Caused by: java.lang.UnsupportedOperationException: Can't convert to color: type=0x2</p>

<p>if i use   <code>&lt;solid android:color="?attr/colorAccent" /&gt;</code></p>

<p>?attr/colorAccent and it works fine if I use</p>

<pre><code> &lt;solid android:color="@color/colorAccent"&gt; 
</code></pre>

<p>as it gives hex color value.</p>

<p>The strange thing same way I have applied this to toolbar and it works below lollipop as well. Only it's giving exception on fab selector file.</p>

<p>I don't understand how can I overcome this?</p>

<p>Fab selector</p>

<pre><code>    &lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt;

    &lt;item android:state_pressed="true"&gt;
        &lt;shape android:shape="oval"&gt;
            &lt;solid android:color="?attr/colorAccent" /&gt;
        &lt;/shape&gt;
    &lt;/item&gt;

    &lt;item android:state_focused="true"&gt;
        &lt;shape android:shape="oval"&gt;
            &lt;solid android:color="?attr/colorAccent" /&gt;
        &lt;/shape&gt;
    &lt;/item&gt;

    &lt;item&gt;
        &lt;shape android:shape="oval"&gt;
            &lt;solid android:color="?attr/colorAccent" /&gt;
        &lt;/shape&gt;
    &lt;/item&gt;

&lt;/selector&gt;
</code></pre>

<p>Log:</p>

<blockquote>
  <p>2800/com.example.siddhi.timetablelayout E/AndroidRuntime: FATAL
  EXCEPTION: main
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity
  ComponentInfo{com.example.siddhi.timetablelayout/com.example.siddhi.timetablelayout.MainActivity}:
  android.view.InflateException: Binary XML file line #16: Error
  inflating class ImageButton
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.access$600(ActivityThread.java:130)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.os.Handler.dispatchMessage(Handler.java:99)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.main(ActivityThread.java:4745)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native
  Method)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  java.lang.reflect.Method.invoke(Method.java:511)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:  Caused by: android.view.InflateException: Binary
  XML file line #16: Error inflating class ImageButton
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.parseInclude(LayoutInflater.java:830)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.rInflate(LayoutInflater.java:736)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.rInflate(LayoutInflater.java:749)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.rInflate(LayoutInflater.java:749)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.inflate(LayoutInflater.java:489)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.inflate(LayoutInflater.java:396)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  com.example.siddhi.timetablelayout.MainFragment.onCreateView(MainFragment.java:33)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.Fragment.performCreateView(Fragment.java:1962)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1248)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1613)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:330)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:547)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1163)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.Activity.performStart(Activity.java:5018)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2032)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.access$600(ActivityThread.java:130) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.os.Handler.dispatchMessage(Handler.java:99) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.main(ActivityThread.java:4745) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native
  Method) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  java.lang.reflect.Method.invoke(Method.java:511) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native
  Method) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:  Caused by:
  android.content.res.Resources$NotFoundException: File
  res/drawable/fab_selector.xml from drawable resource ID #0x7f020081
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.content.res.Resources.loadDrawable(Resources.java:1918)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.content.res.TypedArray.getDrawable(TypedArray.java:601)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at android.view.View.(View.java:3336)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.widget.ImageView.(ImageView.java:114)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.widget.ImageButton.(ImageButton.java:87)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v7.widget.AppCompatImageButton.(AppCompatImageButton.java:59)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v7.widget.AppCompatImageButton.(AppCompatImageButton.java:55)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:107)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:938)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:992)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:171)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:675)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.parseInclude(LayoutInflater.java:830) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.rInflate(LayoutInflater.java:736) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.rInflate(LayoutInflater.java:749) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.rInflate(LayoutInflater.java:749) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.inflate(LayoutInflater.java:489) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  com.example.siddhi.timetablelayout.MainFragment.onCreateView(MainFragment.java:33) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.Fragment.performCreateView(Fragment.java:1962) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1248) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1613) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:330) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:547) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1163) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.Activity.performStart(Activity.java:5018) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2032) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.access$600(ActivityThread.java:130) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.os.Handler.dispatchMessage(Handler.java:99) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.app.ActivityThread.main(ActivityThread.java:4745) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native
  Method) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  java.lang.reflect.Method.invoke(Method.java:511) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native
  Method) 
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:  Caused by: java.lang.UnsupportedOperationException:
  Can't convert to color: type=0x2
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.content.res.TypedArray.getColor(TypedArray.java:326)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.graphics.drawable.GradientDrawable.inflate(GradientDrawable.java:951)
      02-18 05:11:01.161 2800-2800/com.example.siddhi.timetablelayout E/AndroidRuntime:     at
  android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:881)</p>
</blockquote>

<p>Edit: I have mentioned colorAccent in style.xml</p>

<pre><code> &lt;!-- Base application theme. --&gt;
&lt;style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"&gt;
    &lt;!-- Customize your theme here. --&gt;
    &lt;item name="colorPrimary"&gt;@color/colorPrimary&lt;/item&gt;
    &lt;item name="colorPrimaryDark"&gt;@color/colorPrimaryDark&lt;/item&gt;
    &lt;item name="colorAccent"&gt;@color/colorAccent&lt;/item&gt;
    &lt;item name="android:textColorSecondary"&gt;@color/white&lt;/item&gt;
    &lt;item name="windowActionBarOverlay"&gt;false&lt;/item&gt;

    &lt;item name="windowActionBar"&gt;false&lt;/item&gt;

    &lt;item name="windowNoTitle"&gt;true&lt;/item&gt;
    &lt;item name="android:windowBackground"&gt;@color/background_material_light&lt;/item&gt;
&lt;/style&gt;
</code></pre>

<p>What to do? Thank you..</p>