Environment.getExternalStorageDirectory()=内部目录

时间:2016-11-05 07:38:12

标签: android

如何在Android API Level 11中获取SD卡目录?这段代码

Environment.getExternalStorageDirectory();

返回手机记忆库目录(内部目录)。我仅为外部存储添加了AndroidManifest.xml的权限:

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

在某些手机上,此代码可以正常工作(例如,ZTE Blade HN和Phillips),e.t。具体回归SD卡路径。但联想返回内部路径。每部手机都有正式恢复。

2 个答案:

答案 0 :(得分:0)

public static HashSet<String> getExternalMounts() {
    final HashSet<String> out = new HashSet<String>();
    String reg = "(?i).*vold.*(vfat|ntfs|exfat|fat32|ext3|ext4).*rw.*";
    String s = "";
    try {
        final Process process = new ProcessBuilder().command("mount")
                .redirectErrorStream(true).start();
        process.waitFor();
        final InputStream is = process.getInputStream();
        final byte[] buffer = new byte[1024];
        while (is.read(buffer) != -1) {
            s = s + new String(buffer);
        }
        is.close();
    } catch (final Exception e) {
        e.printStackTrace();
    }

    // parse output
    final String[] lines = s.split("\n");
    for (String line : lines) {
        if (!line.toLowerCase(Locale.US).contains("asec")) {
            if (line.matches(reg)) {
                String[] parts = line.split(" ");
                for (String part : parts) {
                    if (part.startsWith("/"))
                        if (!part.toLowerCase(Locale.US).contains("vold"))
                            out.add(part);
                }
            }
        }
    }
    return out;
}

原始方法经过测试并使用我的手机

答案 1 :(得分:0)

在某些设备中,外部SD卡默认名称显示为extSdCard,而其他设备则显示为sdcard1。这段代码片段有助于找出确切的路径,并有助于您重温外部设备的路径,就像手机连接笔记本电脑一样。

private String[] getPaths()
{
  String[] paths = new String[4];

if(new File("/storage/extSdCard/").exists()) 
  paths[0]="/storage/extSdCard/";
if(new File("/storage/sdcard1/").exists()) 
  paths[1]="/storage/sdcard1/";
if(new File("/storage/usbcard1/").exists())  
  paths[2]="/storage/usbcard1/"; 
if(new File("/storage/sdcard0/").exists()) 
  paths[3]="/storage/sdcard0/";

 return paths;
}