Unable to start activity ComponentInfo{com.example.android.pets/com.example.android.pets.CatalogActivity}

[Amirhossein-Ab]

AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.android.pets, PID: 6577
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.pets/com.example.android.pets.CatalogActivity}: android.view.InflateException: Binary XML file line #27: Binary XML file line #27: Error inflating class android.support.design.widget.FloatingActionButton
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2984)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386)
Caused by: android.view.InflateException: Binary XML file line #27: Binary XML file line #27: Error inflating class android.support.design.widget.FloatingActionButton
Caused by: android.view.InflateException: Binary XML file line #27: Error inflating class android.support.design.widget.FloatingActionButton
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.design.widget.FloatingActionButton" on path: DexPathList[[zip file "/data/app/com.example.android.pets-1/base.apk"],nativeLibraryDirectories=[/data/app/com.example.android.pets-1/lib/arm, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.view.LayoutInflater.createView(LayoutInflater.java:616)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:794)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:865)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
at android.view.LayoutInflater.inflate(LayoutInflater.java:525)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:378)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:545)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161)
at com.example.android.pets.CatalogActivity.onCreate(CatalogActivity.java:37)
at android.app.Activity.performCreate(Activity.java:6955)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2927)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386)

[tara-97]

Change the <android.support.design.widget.FloatingActionButton ...>tag for floating action button to
<com.google.android.material.floatingactionbutton.FloatingActionButton ...>.Here is the code for xml layout for activity_catalog.xml.
`

<TextView
    android:id="@+id/text_view_pet"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="@dimen/activity_margin"/>

<com.google.android.material.floatingactionbutton.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:layout_margin="@dimen/fab_margin"
    android:src="@drawable/ic_add_pet"
    android:layout_alignParentEnd="true" />

`

[Classy-Bear]

Thanks @tara-97, it works for me!

[rohitashav-aggarwal]

I had the same issue, it worked for me too. Thanks for the solution.

[Abu3726]

Thanks

[SudKul]

We have upgraded to code to AndroidX in this commit.

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