public interface StreamProgress
total参数为总大小,某些场景下无总大小的标记,则此值应为-1或者Long.MAX_VALUE,表示此参数无效。void start()
void progress(long total,
long progressSize)
total - 总大小,如果未知为 -1或者Long.MAX_VALUEprogressSize - 已经进行的大小void finish()
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