不能转换为LayerDrawable了（V7升级后） [英] Cannot cast to LayerDrawable anymore (after upgrading v7)

问题描述

我使用的是支持库的最后一个版本，22.1.1。

I'm using last version of the support libraries, 22.1.1.

我去，如：

mRatingBar = (RatingBar) getActivity().findViewById(R.id.rating);
LayerDrawable layer = (LayerDrawable) mRatingBar.getProgressDrawable();

但升级后崩溃在与2号线一 ClassCastException异常：

android.support.v4.graphics.drawable.DrawableWrapperHoneycomb cannot be cast to android.graphics.drawable.LayerDrawable
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:973)
            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:725)

我测试在Android 4.2.2。任何提示和放大器;解决方法吗？

I'm testing on Android 4.2.2. Any hints & workaround?

推荐答案

我发现 getProgressDrawable（）不返回我的 LayerDrawable 了。

我是通过设定一个风格 LayerDrawable 的背景下，有：

I was setting a LayerDrawable background through style, with:

<item name="android:ratingBarStyle">@style/myRatingBarStyle</item>

由于v21.1加入的RatingBar ， AppCompatRatingBar ，他们现在读属性的色彩感知版本从 ratingBarStyle ，而不是的android：ratingBarStyle 。所以我不得不更换上述行：

Since v21.1 added a tint-aware version of the RatingBar, AppCompatRatingBar, they are now reading attributes from ratingBarStyle, rather than android:ratingBarStyle. So I had to replace the above line with:

<item name="ratingBarStyle">@style/myRatingBarStyle</item>
<item name="android:ratingBarStyle">@style/myRatingBarStyle</item> //API21+

这篇关于不能转换为LayerDrawable了（V7升级后）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！