三星和华为pad获取到的同一个文件的格式不一样，一个是file开头的一个好像是context开头的，造成通过URI转换成绝对路径时context开头的转化失败，是null
闭关修行中......
One is path, the other is url, the two can be converted to each other.
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One is path, the other is url, the two can be converted to each other.