android - 应用程序 :srcCompat in xml 的 InflateException

Question

在我的 .xml 布局中使用带有矢量可绘制对象的 app:srcCompat 时，我无法在运行 android 4.2.1 的设备上运行代码。例如我有一个像这样的 FAB:

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    ...
    android:tint="@color/colorWhite"
    app:backgroundTint="@color/colorPrimary"
    app:srcCompat="@drawable/ic_add"/>

其中 ic_add 是矢量可绘制对象:

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24.0"
    android:viewportHeight="24.0">
<path
    android:fillColor="#FF000000"
    android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>

这在 Lollipop 上运行良好，但在运行 android 4.2.1 的设备上崩溃:

FATAL EXCEPTION: main
                                                                            android.view.InflateException: Binary XML file line #14: Error inflating class android.support.design.widget.FloatingActionButton
                                                                                at android.view.LayoutInflater.createView(LayoutInflater.java:613)
                                                                                at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
                                                                                at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
                                                                                at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
                                                                                at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
                                                                                at info.samuilife.samuiplus.user.offers.OffersFragment.onCreateView(OffersFragment.kt:34)
                                                                                at android.support.v4.app.Fragment.performCreateView(Fragment.java:2239)
                                                                                at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1332)
                                                                                at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1574)
                                                                                at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1641)
                                                                                at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:794)
                                                                                at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2415)
                                                                                at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2200)
                                                                                at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2153)
                                                                                at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:2034)
                                                                                at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:651)
                                                                                at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
                                                                                at android.support.v4.view.ViewPager.populate(ViewPager.java:1239)
                                                                                at android.support.v4.view.ViewPager.populate(ViewPager.java:1087)
                                                                                at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1613)
                                                                                at android.view.View.measure(View.java:15604)
                                                                                at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4918)
                                                                                at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:713)
                                                                                at android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:90)
                                                                                at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1389)
                                                                                at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:783)
                                                                                at android.view.View.measure(View.java:15604)
                                                                                at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4918)
                                                                                at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
                                                                                at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
                                                                                at android.view.View.measure(View.java:15604)
                                                                                at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4918)
                                                                                at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1411)
                                                                                at android.widget.LinearLayout.measureVertical(LinearLayout.java:698)
                                                                                at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
                                                                                at android.view.View.measure(View.java:15604)
                                                                                at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4918)
                                                                                at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
                                                                                at android.view.View.measure(View.java:15604)
                                                                                at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4918)
                                                                                at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1411)
                                                                                at android.widget.LinearLayout.measureVertical(LinearLayout.java:698)
                                                                                at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
                                                                                at android.view.View.measure(View.java:15604)
                                                                                at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4918)
                                                                                at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
                                                                                at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2191)
                                                                                at android.view.View.measure(View.java:15604)
                                                                                at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2165)
                                                                                at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1249)
                                                                                at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1443)

没有 app:srcCompat 行它工作正常。

在我的 build.gradle 中我还有:

defaultConfig {
    vectorDrawables.useSupportLibrary = true
    ...
}

...

dependencies {
      ...
        compile "com.android.support:appcompat-v7:26.0.0-alpha1"
}

我在这里错过了什么？任何想法/想法将不胜感激!

解决方案: This答案对我有用。

Answer 1

您可能忘记添加设计支持库。因此，您应该通过添加以下行在您的依赖项中添加设计支持库:

dependencies {
      ...
  compile "com.android.support:design:27.0.0"
  //compile "com.android.support:appcompat-v7:26.0.0-alpha1"
}

您不需要添加 appcompat 库，因为它隐式包含在设计支持库中。请记住永远不要在您的代码中使用库的 alpha 版本。

阅读更多关于设计支持库的信息 Using the Design Support Library

---

更新

添加Vector Drawable Support与:

compile "com.android.support:support-vector-drawable:27.0.0"