java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object

问题:java.lang.NullPointerException: Attempt to invoke virtual method ‘java.lang.Object android.content.Context.getSystemService(java.lang.String)’ on a null object reference
at android.view.LayoutInflater.from(LayoutInflater.java:229)
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object

原因是空指针异常,v找不到Activity。

解决方法:
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object