来自官方设计库的带有 FloatingActionButton 的 InflateException [英] InflateException with FloatingActionButton from Official Design Library

问题描述

我在使用 Google 支持设计库中的官方 FloatingActionButton 时遇到了一个错误.

I am getting a bug using the official FloatingActionButton from Google's support design library.

这是我的 LogCat.

Here is my LogCat.

android.view.InflateException: Binary XML file line #34: Error inflating class android.support.design.widget.FloatingActionButton
at android.view.LayoutInflater.createView(LayoutInflater.java:633)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
at de.robv.android.xposed.XposedBridge.invokeOriginalMethodNative(Native Method)
at de.robv.android.xposed.XposedBridge.handleHookedMethod(XposedBridge.java:655)
at android.view.LayoutInflater.inflate(Unknown Source)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at ---.---.com.---.SubCategoryFragment.onCreateView(SubCategoryFragment.java:47)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1789)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:955)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:458)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:117)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:607)
... 24 more
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.graphics.drawable.Drawable android.graphics.drawable.Drawable$ConstantState.newDrawable()' on a null object reference
at android.graphics.drawable.LayerDrawable$ChildDrawable.<init>(LayerDrawable.java:968)
at android.graphics.drawable.LayerDrawable$LayerState.<init>(LayerDrawable.java:1014)
at android.graphics.drawable.RippleDrawable$RippleState.<init>(RippleDrawable.java:910)
at android.graphics.drawable.RippleDrawable.createConstantState(RippleDrawable.java:901)
at android.graphics.drawable.RippleDrawable.createConstantState(RippleDrawable.java:90)
at android.graphics.drawable.LayerDrawable.mutate(LayerDrawable.java:932)
at android.graphics.drawable.RippleDrawable.mutate(RippleDrawable.java:891)
at android.view.View.applyBackgroundTint(View.java:16324)
at android.view.View.setBackgroundDrawable(View.java:16193)
at android.support.design.widget.FloatingActionButton.access$201(FloatingActionButton.java:56)
at android.support.design.widget.FloatingActionButton$1.setBackgroundDrawable(FloatingActionButton.java:118)
at android.support.design.widget.FloatingActionButtonLollipop.setBackgroundDrawable(FloatingActionButtonLollipop.java:75)
at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:131)
at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:79)
... 27 more

唯一指向我的应用程序的行是它对 xml 文件进行膨胀的地方，以及该文件中我的 FloatingActionButton 行.

The only line that points to my app is where it inflates the xml file, and the line in that file which is my FloatingActionButton.

   <android.support.design.widget.FloatingActionButton
        android:id="@+id/myFABSubCat"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_margin="16dp"
        android:backgroundTint="@color/accent"
        android:src="@drawable/add_icon"
        app:borderWidth="0dp"
        app:elevation="4sp" />

额外信息:

这是我的应用主题:

<resources>

    <!-- Base application theme. -->
    <style name="MBTIAppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="colorPrimary">@color/primary</item>
        <item name="colorPrimaryDark">@color/primaryDark</item>
        <item name="colorAccent">@color/accent</item>
        <item name="android:windowContentOverlay">@null</item>
    </style>

    <style name="ThemeNoActionBar" parent="MBTIAppTheme">
        <item name="windowActionBar">false</item>
    </style>

</resources>

是的，我正在使用 AppCompatActivity.

我注意到我使用的是旧版本的 appcompat:

I noticed I am using an older version of appcompat:

com.android.support:appcompat-v7:22.1.1

这似乎是最新的:

compile 'com.android.support:design:22.2.0'

还有，

minSdkVersion 16
targetSdkVersion 22

现在，在某些情况下，我确实将 FAB 的可见性设置为 GONE，但这是在它膨胀之后，所以这不是问题.

Now, I do set the Visibility to GONE in some case for my FAB, but this is after it inflates so that can't be the issue.

现在，这适用于我的 5.1 设备，但有问题的用户使用 5.0.

Now, this works with my 5.1 device, but the users who have issues have 5.0.

这是一个已知的错误还是我做错了什么?

Is this a known bug or maybe I am doing something wrong?

推荐答案

com.android.support:appcompat-v7:21+ 添加了对运行 android 5.1(API 级别)之前的设备上的着色小部件的支持21).要使用它，请确保您扩展或设置 AppCompat 主题并使用 app:backgroundTint 而不是 android:backgroundTint.

com.android.support:appcompat-v7:21+ added support for tinting widgets on devices running pre android 5.1 (API Level 21). To make use of it make sure you extend or set the AppCompat Theme and use app:backgroundTint instead of android:backgroundTint.

示例:

<android.support.design.widget.FloatingActionButton 
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="16dp"
    android:src="@drawable/icon"
    app:backgroundTint="@color/accent"
    app:borderWidth="0dp" />

这篇关于来自官方设计库的带有 FloatingActionButton 的 InflateException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！