floating action button - Error inflating class android.support.design.widget.CoordinatorLayout -


i use floatingactionbutton on application, read : https://guides.codepath.com/android/floating-action-buttons#google-s-official-support-library when run activity have error :

java.lang.runtimeexception: unable start activity componentinfo{com.xavier_laffargue.podcast/com.xavier_laffargue.podcast.act_test}: android.view.inflateexception: binary xml file line #1: error inflating class android.support.design.widget.coordinatorlayout

xml file

<android.support.design.widget.coordinatorlayout     android:id="@+id/main_content"     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     android:layout_width="match_parent"     android:layout_height="match_parent">      <listview         android:id="@+id/lvtodolist"         android:layout_width="match_parent"         android:layout_height="match_parent"></listview>      <android.support.design.widget.floatingactionbutton         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_gravity="bottom|right"         android:layout_margin="24dp"         android:src="@drawable/ic_action_refresh"         app:layout_anchor="@id/lvtodolist"         app:layout_anchorgravity="bottom|right|end" />  </android.support.design.widget.coordinatorlayout>

graddle

*apply plugin: 'com.android.application'  android {     compilesdkversion 21     buildtoolsversion "21.1.2"      defaultconfig {         applicationid "com.xavier_laffargue.podcast"         minsdkversion 21         targetsdkversion 20         versioncode 1         versionname "1.0"     }     buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     compile filetree(dir: 'libs', include: ['*.jar'])      compile 'com.android.support:appcompat-v7:22.2.0'     compile 'com.android.support:support-v4:22.2.0'     compile 'com.android.support:design:22.2.0'      compile 'com.android.support:multidex:1.0.1'     compile 'com.android.support:support-v13:22.2.0'     compile 'com.android.support:cardview-v7:21.0.+'     compile 'com.android.support:recyclerview-v7:21.0.+'  }

please change appcompatactivity if use activity. becomes error when activity.


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