FloatingActionButton异常怎么解决

Question

Caused by: android.view.InflateException: Binary XML file line #45: Binary XML file line #45: Error inflating class FloatingActionButton
     Caused by: android.view.InflateException: Binary XML file line #45: Error inflating class FloatingActionButton
     Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.FloatingActionButton" on path: DexPathList[[zip file "/data/app/com.example.helloworld-2/base.apk"],nativeLibraryDirectories=[/data/app/com.example.helloworld-2/lib/x86, /system/lib, /vendor/lib]]

Answer 1

很好奇你是怎么编译通过的，Android自己不带这个样式的，使用第三方库：

implementation 'com.google.android.material:material:1.0.0'

在布局文件中使用：

 <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:src="@mipmap/add"
        android:backgroundTint="#00ff00"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />