java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference       报错;           java.lang.NullPointerException: Attempt to invoke virtual method .....on a null object reference    XML文件,View写错成小写的view;

java.lang.NullPointerException: Attempt to invoke virtual method .....on a null object reference




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