android获得内部存储/外部存储路径

最新推荐文章于 2025-04-10 20:26:04 发布

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本文介绍了一种在Android设备上获取所有可用外部SD卡路径的方法。通过检查系统的挂载状态并解析`mount`命令的输出来判断是否有TF卡存在，并获取其路径。

public static List<String> getExtSDCardPaths() {

    List<String> paths = new ArrayList<String>();
    String extFileStatus = Environment.getExternalStorageState();
    File extFile = Environment.getExternalStorageDirectory();
    if (extFileStatus.equals(Environment.MEDIA_MOUNTED)
            && extFile.exists() && extFile.isDirectory()
            && extFile.canWrite()) {
        paths.add(extFile.getAbsolutePath());
    }
    try {
        // obtain executed result of command line code of 'mount', to judge
        // whether tfCard exists by the result
        Runtime runtime = Runtime.getRuntime();
        Process process = runtime.exec("mount");
        InputStream is = process.getInputStream();
        InputStreamReader isr = new InputStreamReader(is);
        BufferedReader br = new BufferedReader(isr);
        String line = null;
        int mountPathIndex = 1;
        while ((line = br.readLine()) != null) {
            // format of sdcard file system: vfat/fuse
            if ((!line.contains("fat") && !line.contains("fuse") && !line
                    .contains("storage"))
                    || line.contains("secure")
                    || line.contains("asec")
                    || line.contains("firmware")
                    || line.contains("shell")
                    || line.contains("obb")
                    || line.contains("legacy") || line.contains("data")) {
                continue;
            }
            String[] parts = line.split(" ");
            int length = parts.length;
            if (mountPathIndex >= length) {
                continue;
            }
            String mountPath = parts[mountPathIndex];
            if (!mountPath.contains("/") || mountPath.contains("data")
                    || mountPath.contains("Data")) {
                continue;
            }
            File mountRoot = new File(mountPath);
            if (!mountRoot.exists() || !mountRoot.isDirectory()
                    || !mountRoot.canWrite()) {
                continue;
            }
            boolean equalsToPrimarySD = mountPath.equals(extFile
                    .getAbsolutePath());
            if (equalsToPrimarySD) {
                continue;
            }
            paths.add(mountPath);
        }
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return paths;
}