close() was never explicitly called on database，SQLiteMisuseException

报错：close() was never explicitly called on database '/data/data/com....'

原因：数据库使用后未关闭

解决：使用后关闭（有点废话了）

报错：android.database.sqlite.SQLiteMisuseException: library routine called out of sequence

原因：貌似是对数据库频繁的操作引起的

解决：参考http://stackoverflow.com/questions/13124257/several-exceptions-when-working-with-sqlite-database 

好记性不如烂笔头（现在是键盘了），因此记录一下