Android设备获取存储卡路径

Android设备获取存储卡路径的源程序,高于3.2版本时,用getVolumePaths通过反射获取,否则通过System.getenv(SECONDARY_STORAGE)获取,再通过查询剩余空间确定是否插有SD卡

(Android device obtains the source program of the memory card path. If it is higher than version 3.2, use getVolumePaths to obtain it through reflection. Otherwise, use System.getenv (SECONDARY_STORAGE) to obtain it, and then query the remaining space to determine whether an SD card is inserted)

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