Android的外部SDCard文件路径

概述Android设备上的外部SDCard的文件路径是否始终为“/ storage / extSdCard”？如果没有,有多少变化？ 我需要我的App来测试外部SDCard的可用性. 我使用的是Titanium,它有一个方法Titanium.Filesystem.isExternalStoragePresent() 但是即使外部SDCard未挂载,它始终返回true. 我认为它在本地存储中检测到SDC Android设备上的外部SDCard的文件路径是否始终为“/ storage / extSdCard”？如果没有,有多少变化？

我需要我的App来测试外部SDCard的可用性.

我使用的是Titanium,它有一个方法Titanium.filesystem.isExternalStoragePresent()
但是即使外部SDCard未挂载,它始终返回true.

我认为它在本地存储中检测到SDCard,因此返回true.但我真正想要的是检测物理SDCard是否挂载.

可以通过单独检测文件“/ storage / extSdCard”的存在来做到这一点吗？

谢谢.

@H_301_13@解决方法 我希望对你有用:)

import androID.os.Environment;import java.io.file;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Scanner;public class MemoryStorage {    private MemoryStorage() {}    public static final String SD_CARD = "sdCard";    public static final String EXTERNAL_SD_CARD = "externalSdCard";    /**     * @return True if the external storage is available. False otherwise.     */    public static boolean isAvailable() {        String state = Environment.getExternalStorageState();        if (Environment.MEDIA_MOUNTED.equals(state) || Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {            return true;        }        return false;    }    public static String getSdCardpath() {        return Environment.getExternalStorageDirectory().getPath() + "/";    }    /**     * @return True if the external storage is writable. False otherwise.     */    public static boolean isWritable() {        String state = Environment.getExternalStorageState();        if (Environment.MEDIA_MOUNTED.equals(state)) {            return true;        }        return false;    }    /**     * @return A map of all storage locations available     */    public static Map<String,file> getAllStorageLocations() {        Map<String,file> map = new HashMap<String,file>(10);        List<String> mMounts = new ArrayList<String>(10);        List<String> mVold = new ArrayList<String>(10);        mMounts.add("/mnt/sdcard");        mVold.add("/mnt/sdcard");        try {            file mountfile = new file("/proc/mounts");            if (mountfile.exists()) {                Scanner scanner = new Scanner(mountfile);                while (scanner.hasNext()) {                    String line = scanner.nextline();                    if (line.startsWith("/dev/block/vold/")) {                        String[] lineElements = line.split(" ");                        String element = lineElements[1];                        // don't add the default mount path                        // it's already in the List.                        if (!element.equals("/mnt/sdcard"))                            mMounts.add(element);                    }                }            }        } catch (Exception e) {            e.printstacktrace();        }        try {            file voldfile = new file("/system/etc/vold.fstab");            if (voldfile.exists()) {                Scanner scanner = new Scanner(voldfile);                while (scanner.hasNext()) {                    String line = scanner.nextline();                    if (line.startsWith("dev_mount")) {                        String[] lineElements = line.split(" ");                        String element = lineElements[2];                        if (element.contains(":"))                            element = element.substring(0,element.indexOf(":"));                        if (!element.equals("/mnt/sdcard"))                            mVold.add(element);                    }                }            }        } catch (Exception e) {            e.printstacktrace();        }        for (int i = 0; i < mMounts.size(); i++) {            String mount = mMounts.get(i);            if (!mVold.contains(mount))                mMounts.remove(i--);        }        mVold.clear();        List<String> mountHash = new ArrayList<String>(10);        for (String mount : mMounts) {            file root = new file(mount);            if (root.exists() && root.isDirectory() && root.canWrite()) {                file[] List = root.Listfiles();                String hash = "[";                if (List != null) {                    for (file f : List) {                        hash += f.getname().hashCode() + ":" + f.length() + ",";                    }                }                hash += "]";                if (!mountHash.contains(hash)) {                    String key = SD_CARD + "_" + map.size();                    if (map.size() == 0) {                        key = SD_CARD;                    } else if (map.size() == 1) {                        key = EXTERNAL_SD_CARD;                    }                    mountHash.add(hash);                    map.put(key,root);                }            }        }        mMounts.clear();        if (map.isEmpty()) {            map.put(SD_CARD,Environment.getExternalStorageDirectory());        }        return map;    }}

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