SparseArray

Recommended data-structures:

  • ArrayMap<K,V> in place of HashMap<K,V>
  • ArraySet<K,V> in place of HashSet<K,V>
  • SparseArray<V> in place of HashMap<Integer,V>
  • SparseBooleanArray in place of HashMap<Integer,Boolean>
  • SparseIntArray in place of HashMap<Integer,Integer>
  • SparseLongArray in place of HashMap<Integer,Long>
  • LongSparseArray<V> in place of HashMap<Long,V>
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原文地址：https://www.cnblogs.com/wutianlong/p/6800612.html