（android problem）can't cast android.widget.linearlayout to android.widget.textview

其實是佈局的原因，改下佈局xml即可。網上搜了一下，有一位說的很到位。

It appears that you are passing in null as the root element of the view group. I would assume that the inflater is defaulting your view group to a linear layout, when you don't actually have a view group at all. I would try to modify your inflate call, as your layout file appears OK.