Android【报错】. lang。android.app ClassCastException。SharedPreferencesImpl不能被强制转换为android.content.Shared
. lang。android.app ClassCastException。SharedPreferencesImpl不能被强制转换为android.content.SharedPreferences$Editor
极有可能是因为：
错误代码
SharedPreferences.Editor sp = (Editor) getActivity().getSharedPreferences("data", 0x0000).edit();正确代码：
SharedPreferences sp = (Editor) getActivity().getSharedPreferences("data", 0x0000).edit();sp.putString("name", username);sp.apply();所以类型不匹配无法强制转换
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