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Strangely enough this solved my list_item.xml problem too, where I had multiple items in it but no id set for the LinearLayout containing them. Somehow android can't distinguish it from a normal View, probably because it doesn't have the R.layout type without the id, so it tries to cast it and fails.
Solve the android.widget.LinearLayout to android.widget.TextView casting issue in RecyclerView with expert tips and code examples.
在Android开发中，"android.widget.LinearLayout cannot be cast to android.widget.TextView"错误通常发生在试图将一个LinearLayout对象强制转换为TextView对象时。这种类型转换错误的主要原因是视图ID的混淆或复用。 例如，在布局文件中，可能无意间为不同视图分配了相同的ID，或者在代码中使用`findViewById`方法时 ...
如果是在xml中写布局，就在LinearLayout外面包裹一层RelativLayout，即可解决 问题的情况跟下面这篇博文类似，我懒得写了，解决方案也是受到这篇文章的启发：
报错textview cannot be cast to android.widget.linealayout，该怎么改xmllayout = (LinearLayout) findViewById (R.id.LinearLayout01); 这句错了! 不知道你要干嘛？
博主分享了一个Android开发中遇到的错误，报错为ClassCastException，网上未找到解决方法，最后发现是activity_main.xml中EditText的id和MianActivity.java中的id不照应。 总结指出遇到问题应先看自己代码，而非急于上网搜答案。
When I run the code, it casts an exception "android.widget.LinearLayout cannot be cast to android.widget.TextView, when reaching the first line of the void addKeyValuePair.
I ran into a similar problem and I found the answer here. Basically, you should choose the LayoutParams depending on the parent, in your case new LinearLayout.LayoutParams should be new RelativeLayout.LayoutParams.
android.widget. LinearLayout cannot be cast to android.app.Activity 一个很简单的错误，让我找了半天。总结来说，就是粗心造成的。 从字面意思上看是类型转换错误。先根据log定位到activity，然后根据log,检查xml中有没有哪里写错的地方。比如我这次就是将自定义的view，当做layout用include引入，这种错误仔细检查就 ...
Learn how to fix ClassCastException issues in Android when migrating to newer UI components like DrawerLayout.