如何在Android中获取sdcard(Secondary)存储路径?

问题描述

我正在开发文件管理器应用程序.我想向用户显示内部存储和sdcard存储(如果存在).对于内部存储，我使用Environment.getExternalStorageDirectory().getPath().如何获取SD存储空间?

I'm developing a File Manager app. I want show to the user the internal storage and the sdcard storage if it exists. For internal storage I use Environment.getExternalStorageDirectory().getPath(). How can I get the SD storage?

推荐答案

不确定该解决方案是否适合文件管理器，但是经过多年尝试获取正确的代码后，这是我最近的解决方案:

not sure this solution fits a File Manager but after many years trying to get the right code, this is my most recent one:

/**
 * Returns all available SD-Cards in the system (include emulated)
 *
 * Warning: Hack! Based on Android source code of version 4.3 (API 18)
 * Because there is no standard way to get it.
 *
 * @return paths to all available SD-Cards in the system (include emulated)
 */
public static String[] getStorageDirectories(Context pContext)
{
    // Final set of paths
    final Set<String> rv = new HashSet<>();

    //Get primary & secondary external device storage (internal storage & micro SDCARD slot...)
    File[]  listExternalDirs = ContextCompat.getExternalFilesDirs(pContext, null);
    for(int i=0;i<listExternalDirs.length;i++){
        if(listExternalDirs[i] != null) {
            String path = listExternalDirs[i].getAbsolutePath();
            int indexMountRoot = path.indexOf("/Android/data/");
            if(indexMountRoot >= 0 && indexMountRoot <= path.length()){
                //Get the root path for the external directory
                rv.add(path.substring(0, indexMountRoot));
            }
        }
    }
    return rv.toArray(new String[rv.size()]);
}

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