InflateException 因为 Android 5.0 + 上的浮动操作按钮上的样式属性
InflateException because of style attr on Floating Action Button on Android 5.0 +
我正在重复这个项目 https://github.com/sitepoint-editors/FloatingActionButton_Animation_Project，它使用标准 Floating Action Button。
在main.xml布局中：
...
<android.support.design.widget.FloatingActionButton
android:id="@+id/calls_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_marginRight="16dp"
android:layout_marginEnd="16dp"
android:layout_marginBottom="64dp"
android:src="@drawable/ic_plus"
app:layout_anchor="@id/fragment_calls_swipeRefreshLayout"
app:layout_anchorGravity="bottom|end"
app:layout_behavior="com.my.utils.ScrollAwareFABBehavior"
/>
<include layout="@layout/fab_add_layout" />
...
附加按钮fab_add_layout.xml:
<FrameLayout 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">
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_group_add_black_24dp"
style="@style/MyAppTheme.SubFab"
app:fabSize="mini"
/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_accounts"
style="@style/MyAppTheme.SubFab"
app:fabSize="mini"
/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_opportunities"
style="@style/MyAppTheme.SubFab"
app:fabSize="mini"
/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_leads"
style="@style/MyAppTheme.SubFab"
app:fabSize="mini"
/>
</FrameLayout>
在 Android 4.4 的设备上一切正常，但在从 Lollipop 开始的更高版本上我收到错误消息：
Process: com.myfabs , PID: 11441
android.view.InflateException: Binary XML file line #36: Binary XML file line #6: Error inflating class <unknown>
at android.view.LayoutInflater.inflate(LayoutInflater.java:561)
at android.view.LayoutInflater.inflate(LayoutInflater.java:437)
at fi.lunni.mobileadvisor.ui.fragments.CallsListFragment_.onCreateView(CallsListFragment_.java:54)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2087)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1113)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1295)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1643)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:679)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:166)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1272)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1120)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1646)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:703)
at android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:90)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1367)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:768)
at android.view.View.measure(View.java:18948)
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1081)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1486)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:765)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:647)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1486)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:765)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:647)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2713)
at android.view.View.measure(View.java:18948)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2158)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1252)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1488)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1143)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6256)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:886)
at android.view.Choreographer.doCallbacks(Choreographer.java:698)
at android.view.Choreographer.doFrame(Choreographer.java:633)
在我去掉 style 属性后一切正常。这是我的 style ：
<style name="MyAppTheme.SubFab">
<item name="android:layout_marginRight">24dp</item>
<item name="android:layout_marginEnd" tools:targetApi="17">24dp</item>
<item name="android:layout_marginBottom">72dp</item>
<item name="android:backgroundTint" tools:targetApi="21">@color/blue</item>
<item name="android:visibility">invisible</item>
<item name="android:layout_gravity">bottom|right|end</item>
</style>
问题 : 你能解释一下这个问题吗？为什么会这样？
为您的样式指定父项，不要在样式名称中使用 .，它有一个 precise meaning.
此外，您应该使用 backgroundTint 而不是 android:backgroundTint，因为 FloatingActionButton 有自己的 backgroundTint 属性（其行为与 android:backgroundTint 略有不同） , 也兼容 21:
之前的 API 关卡
<style name="SubFab" parent="@style/Widget.Design.FloatingActionButton">
<item name="android:layout_marginRight">@dimen/sub_fab_rightMargin</item>
<item name="android:layout_marginEnd" tools:targetApi="17">@dimen/sub_fab_rightMargin</item>
<item name="android:layout_marginBottom">@dimen/sub_fab_bottomMargin</item>
<item name="android:visibility">invisible</item>
<item name="android:layout_gravity">bottom|right|end</item>
<item name="backgroundTint">@color/blue</item>
</style>
我正在重复这个项目 https://github.com/sitepoint-editors/FloatingActionButton_Animation_Project，它使用标准 Floating Action Button。
在main.xml布局中：
...
<android.support.design.widget.FloatingActionButton
android:id="@+id/calls_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_marginRight="16dp"
android:layout_marginEnd="16dp"
android:layout_marginBottom="64dp"
android:src="@drawable/ic_plus"
app:layout_anchor="@id/fragment_calls_swipeRefreshLayout"
app:layout_anchorGravity="bottom|end"
app:layout_behavior="com.my.utils.ScrollAwareFABBehavior"
/>
<include layout="@layout/fab_add_layout" />
...
附加按钮fab_add_layout.xml:
<FrameLayout 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">
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_group_add_black_24dp"
style="@style/MyAppTheme.SubFab"
app:fabSize="mini"
/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_accounts"
style="@style/MyAppTheme.SubFab"
app:fabSize="mini"
/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_opportunities"
style="@style/MyAppTheme.SubFab"
app:fabSize="mini"
/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab_4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_leads"
style="@style/MyAppTheme.SubFab"
app:fabSize="mini"
/>
</FrameLayout>
在 Android 4.4 的设备上一切正常，但在从 Lollipop 开始的更高版本上我收到错误消息：
Process: com.myfabs , PID: 11441
android.view.InflateException: Binary XML file line #36: Binary XML file line #6: Error inflating class <unknown>
at android.view.LayoutInflater.inflate(LayoutInflater.java:561)
at android.view.LayoutInflater.inflate(LayoutInflater.java:437)
at fi.lunni.mobileadvisor.ui.fragments.CallsListFragment_.onCreateView(CallsListFragment_.java:54)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2087)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1113)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1295)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1643)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:679)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:166)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1272)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1120)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1646)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:703)
at android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:90)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1367)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:768)
at android.view.View.measure(View.java:18948)
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1081)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1486)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:765)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:647)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1486)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:765)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:647)
at android.view.View.measure(View.java:18948)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5976)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2713)
at android.view.View.measure(View.java:18948)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2158)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1252)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1488)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1143)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6256)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:886)
at android.view.Choreographer.doCallbacks(Choreographer.java:698)
at android.view.Choreographer.doFrame(Choreographer.java:633)
在我去掉 style 属性后一切正常。这是我的 style ：
<style name="MyAppTheme.SubFab">
<item name="android:layout_marginRight">24dp</item>
<item name="android:layout_marginEnd" tools:targetApi="17">24dp</item>
<item name="android:layout_marginBottom">72dp</item>
<item name="android:backgroundTint" tools:targetApi="21">@color/blue</item>
<item name="android:visibility">invisible</item>
<item name="android:layout_gravity">bottom|right|end</item>
</style>
问题 : 你能解释一下这个问题吗？为什么会这样？
为您的样式指定父项，不要在样式名称中使用 .，它有一个 precise meaning.
此外，您应该使用 backgroundTint 而不是 android:backgroundTint，因为 FloatingActionButton 有自己的 backgroundTint 属性（其行为与 android:backgroundTint 略有不同） , 也兼容 21:
<style name="SubFab" parent="@style/Widget.Design.FloatingActionButton">
<item name="android:layout_marginRight">@dimen/sub_fab_rightMargin</item>
<item name="android:layout_marginEnd" tools:targetApi="17">@dimen/sub_fab_rightMargin</item>
<item name="android:layout_marginBottom">@dimen/sub_fab_bottomMargin</item>
<item name="android:visibility">invisible</item>
<item name="android:layout_gravity">bottom|right|end</item>
<item name="backgroundTint">@color/blue</item>
</style>