摘要： 这问题一般是在manifest.xml中没有配置相应的activity，或者配置的android:name 的路径不对，没写全。可是今天我在manifest中已经配置正确了activity还有这错误。原因在activity的构造方法我的activity中的构造方法中写多了参数，导致跳转时，初始activity出错，把参数去掉就可以了。 阅读全文

摘要： void android.view.View.setTag(Objecttag)public void setTag (Object tag)Since: API Level 1Sets the tag associated with this view. A tag can be used to mark a view in its hierarchy and does not have to be unique within the hierarchy. Tags can also be used to store data within a view without resorting 阅读全文