解析巨大的JSON对象的Android？ [英] Parsing huge JSON object in Android?
问题描述
如何解析巨大的JSON文件中的Android？
How to parse huge JSON file in Android?
当我解析这样的文件，我在这样的事情上的日志看：
When I parse such file I see on something like this on logs:
04-05 15:55:46.490: DEBUG/dalvikvm(3847): GC freed 12159 objects / 557744 bytes in 142ms
04-05 15:55:46.490: INFO/global(3847): Default buffer size used in BufferedReader constructor. It would be better to be explicit if an 8k-char buffer is required.
04-05 15:55:46.650: DEBUG/dalvikvm(3847): GC freed 56 objects / 100176 bytes in 115ms
04-05 15:55:46.660: INFO/dalvikvm-heap(3847): Grow heap (frag case) to 4.207MB for 110626-byte allocation
04-05 15:55:46.760: DEBUG/dalvikvm(3847): GC freed 0 objects / 0 bytes in 104ms
04-05 15:55:46.890: DEBUG/dalvikvm(3847): GC freed 3 objects / 73856 bytes in 115ms
04-05 15:55:47.050: DEBUG/dalvikvm(3847): GC freed 7 objects / 110872 bytes in 113ms
04-05 15:55:47.050: INFO/dalvikvm-heap(3847): Grow heap (frag case) to 4.426MB for 248896-byte allocation
04-05 15:55:47.150: DEBUG/dalvikvm(3847): GC freed 0 objects / 0 bytes in 104ms
04-05 15:55:47.310: DEBUG/dalvikvm(3847): GC freed 8 objects / 166232 bytes in 106ms
04-05 15:55:47.310: INFO/dalvikvm-heap(3847): Grow heap (frag case) to 4.624MB for 373340-byte allocation
04-05 15:55:47.420: DEBUG/dalvikvm(3847): GC freed 0 objects / 0 bytes in 106ms
04-05 15:55:47.580: DEBUG/dalvikvm(3847): GC freed 10 objects / 249288 bytes in 111ms
04-05 15:55:47.590: INFO/dalvikvm-heap(3847): Grow heap (frag case) to 4.920MB for 560006-byte allocation
04-05 15:55:47.690: DEBUG/dalvikvm(3847): GC freed 0 objects / 0 bytes in 98ms
04-05 15:55:47.810: DEBUG/dalvikvm(3847): GC freed 12 objects / 373792 bytes in 88ms
04-05 15:55:47.910: DEBUG/dalvikvm(3847): GC freed 4 objects / 560088 bytes in 87ms
04-05 15:55:48.010: DEBUG/dalvikvm(3847): GC freed 5 objects / 128 bytes in 88ms
04-05 15:55:48.010: INFO/dalvikvm-heap(3847): Grow heap (frag case) to 5.350MB for 461302-byte allocation
04-05 15:55:48.130: DEBUG/dalvikvm(3847): GC freed 0 objects / 0 bytes in 120ms
04-05 15:55:48.990: DEBUG/dalvikvm(3847): GC freed 10419 objects / 1383992 bytes in 109ms
04-05 15:55:49.720: DEBUG/dalvikvm(3847): GC freed 8769 objects / 384360 bytes in 115ms
04-05 15:55:50.550: DEBUG/dalvikvm(3847): GC freed 10472 objects / 454880 bytes in 129ms
04-05 15:55:51.590: DEBUG/dalvikvm(3847): GC freed 12663 objects / 554440 bytes in 147ms
有没有拉解析器对JSON文件？如何处理这样的事情？
Is there a pull parser for Json files? How to deal with such thing?
推荐答案
看看杰克逊JSON解析器，它比一个在Android的速度更快，而且比GSON更快，并支持流媒体。
Take a look at the Jackson JSON parser, it's faster than the one in Android, and faster than GSON, and supports streaming.
我也不过重申别人提出的观点，你的JSON是巨大的，它表明一个非最佳的设计。例如如果连接是靠不住的，它失败了几次，你可能会导致用户承担在移动数据计划额外的数据费用。总是更好的分解，其中可能因此失败并不涉及再次请求了一大堆。
I do however reiterate the point made by others that your JSON is HUGE and that does suggest a non-optimal design. e.g. if the connection is wonky and it fails a few times you could cause your user to incur additional data costs on a mobile data plan. Always better to break it down where possible so failure doesn't involve requesting the whole lot again.
这篇关于解析巨大的JSON对象的Android？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
