Android数据存储
SharedPreferences----------->for primitive data
Internal Storage-------------->for private data
External Storage------------->for large data sets that are not private
SQLite Databases------------>for structured storage
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Content Provider--------------->expose your private data to other applications.
-------------------------------->exposes read/write access to you application data,subject to whatever restrictions you want to impose.
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出处:http://cnblogs.com/daishuguang