Drawable已经属于另一个所有者，但没有公开恒定状态 [英] Drawable already belongs to another owner but does not expose a constant state

问题描述

错误:无效的可绘制对象已添加到LayerDrawable中！ Drawable已经属于另一个所有者，但是没有公开恒定状态.

我今天突然注意到了这个错误，我不确定是否是因为我刚刚将测试设备更新为Android 8.0.该错误消息清楚地表明，在浮动操作按钮上设置波纹效果有问题，并且在按下按钮时确实没有波纹效果.但是，我不确定是什么导致了此问题.实际上，相同的错误连续两次抛出.任何帮助将非常感激！该应用程序的其余部分仍然可以正常运行，但是该错误确实困扰着我.

I suddenly noticed this error today, and I'm not sure if it was because I just updated my testing device to Android 8.0. The error message clearly states there's something wrong with setting the ripple effect on the floating action button, and indeed there is no ripple effect when the button is pressed. However, I'm not sure what is causing this problem. Actually, the exact same bug is thrown twice in a row. Any help would be much appreciated! The rest of the app still runs normally, but the bug is really bothering me.

p.s. minSdkVersion为22，targetSdkVersion和compiledSdkVersion为27

p.s. minSdkVersion is 22, targetSdkVersion and compiledSdkVersion are 27

在MyActivity中，第117行是数据绑定和设置内容视图.

In MyActivity, line 117 is the data binding and setting the content view.

ActivityMyBinding binding = DataBindingUtil.setContentView(
            this, R.layout.activity_my);

这是完整的堆栈跟踪:

W/LayerDrawable: Invalid drawable added to LayerDrawable! Drawable already belongs to another owner but does not expose a constant state.
             java.lang.RuntimeException
                 at android.graphics.drawable.LayerDrawable$ChildDrawable.<init>(LayerDrawable.java:1855)
                 at android.graphics.drawable.LayerDrawable$LayerState.<init>(LayerDrawable.java:1975)
                 at android.graphics.drawable.LayerDrawable.createConstantState(LayerDrawable.java:168)
                 at android.graphics.drawable.LayerDrawable.mutate(LayerDrawable.java:1779)
                 at android.graphics.drawable.LayerDrawable.mutate(LayerDrawable.java:1785)
                 at android.graphics.drawable.RippleDrawable.mutate(RippleDrawable.java:997)
                 at android.view.View.applyBackgroundTint(View.java:21809)
                 at android.view.View.setBackgroundDrawable(View.java:21680)
                 at android.support.design.widget.FloatingActionButton.access$001(FloatingActionButton.java:68)
                 at android.support.design.widget.FloatingActionButton$ShadowDelegateImpl.setBackgroundDrawable(FloatingActionButton.java:824)
                 at android.support.design.widget.FloatingActionButtonLollipop.setBackgroundDrawable(FloatingActionButtonLollipop.java:73)
                 at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:179)
                 at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:151)
                 at java.lang.reflect.Constructor.newInstance0(Native Method)
                 at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
                 at android.view.LayoutInflater.createView(LayoutInflater.java:647)
                 at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
                 at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
                 at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
                 at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
                 at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
                 at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
                 at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
                 at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
                 at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:276)
                 at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:261)
                 at com.generica.genericb.genericc.MyActivity.onCreate(MyActivity.java:117)
                 at android.app.Activity.performCreate(Activity.java:7174)
                 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2908)
                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3030)
                 at android.app.ActivityThread.-wrap11(Unknown Source:0)
                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)
                 at android.os.Handler.dispatchMessage(Handler.java:105)
                 at android.os.Looper.loop(Looper.java:164)
                 at android.app.ActivityThread.main(ActivityThread.java:6938)
                 at java.lang.reflect.Method.invoke(Native Method)
                 at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

推荐答案

将app:srcCompat="@android:drawable/..."更改为android:src="@android:drawable/..."对其进行了修复.

Changing app:srcCompat="@android:drawable/..." to android:src="@android:drawable/..." fixed it for me.

奇怪...谁在发布答案之前将我指向解决方案，但他们删除了答案. =/

Strange... whoever posted an answer before pointed me to the solution, but they deleted their answer. =/

他们提到了Drawable如何具有状态，如果将其分配给多个浮动动作按钮，则跟踪Drawable的状态将会出现问题.显然是最近的更新，此问题已得到解决.这使我意识到，我是使用app:srcCompat而不是android:src来设置FAB的源.

They mentioned how a Drawable has a state, and if you assign it to more than one Floating Action Button, then there will be a problem keeping track of the Drawable's state. Apparently with a recent update, this problem was fixed. This led me to realize that I was setting the FAB's source with app:srcCompat rather than android:src.

这篇关于Drawable已经属于另一个所有者，但没有公开恒定状态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！