我是Android的初学者。如何找到内部SD卡的路径,然后找到它们的已用空间和可用空间。请回复您的评论和答案对我很有价值。
我是Android的初学者。如何找到内部SD卡的路径,然后找到它们的已用空间和可用空间。请回复您的评论和答案对我很有价值。
Environment
上的各种方法返回(例如getExternalStorageDirectory()
)。这将是设备制造商指定用于此目的的任何存储。总是可以从android.os
中使用System.getenv(ENV_EXTERNAL_STORAGE)
:
源代码中的其他示例:
public static File getExternalStorageDirectory() {
throwIfUserRequired();
return sCurrentUser.getExternalDirs()[0];
}
/** {@hide} */
public static File getLegacyExternalStorageDirectory() {
return new File(System.getenv(ENV_EXTERNAL_STORAGE));
}
/** {@hide} */
public static File getLegacyExternalStorageObbDirectory() {
return buildPath(getLegacyExternalStorageDirectory(), DIR_ANDROID, DIR_OBB);
}
Environment.java
private static final String ENV_EXTERNAL_STORAGE = "EXTERNAL_STORAGE";
private static final String ENV_ANDROID_ROOT = "ANDROID_ROOT";
private static final String ENV_ANDROID_DATA = "ANDROID_DATA";
private static final String ENV_ANDROID_EXPAND = "ANDROID_EXPAND";
private static final String ENV_ANDROID_STORAGE = "ANDROID_STORAGE";
private static final String ENV_DOWNLOAD_CACHE = "DOWNLOAD_CACHE";
private static final String ENV_OEM_ROOT = "OEM_ROOT";
private static final String ENV_ODM_ROOT = "ODM_ROOT";
private static final String ENV_VENDOR_ROOT = "VENDOR_ROOT";
/** {@hide} */
public static final String DIR_ANDROID = "Android";
private static final String DIR_DATA = "data";
private static final String DIR_MEDIA = "media";
private static final String DIR_OBB = "obb";
private static final String DIR_FILES = "files";
private static final String DIR_CACHE = "cache";
/** {@hide} */
@Deprecated
public static final String DIRECTORY_ANDROID = DIR_ANDROID;
private static final File DIR_ANDROID_ROOT = getDirectory(ENV_ANDROID_ROOT, "/system");
private static final File DIR_ANDROID_DATA = getDirectory(ENV_ANDROID_DATA, "/data");
private static final File DIR_ANDROID_EXPAND = getDirectory(ENV_ANDROID_EXPAND, "/mnt/expand");
private static final File DIR_ANDROID_STORAGE = getDirectory(ENV_ANDROID_STORAGE, "/storage");
private static final File DIR_DOWNLOAD_CACHE = getDirectory(ENV_DOWNLOAD_CACHE, "/cache");
private static final File DIR_OEM_ROOT = getDirectory(ENV_OEM_ROOT, "/oem");
private static final File DIR_ODM_ROOT = getDirectory(ENV_ODM_ROOT, "/odm");
private static final File DIR_VENDOR_ROOT = getDirectory(ENV_VENDOR_ROOT, "/vendor");
源代码
File dir = new File(Environment.getExternalStorageDirectory().getParent());
File[] f = dir.listFiles();
for(File file:f)
{
if(file.getName().equals("sdacard0"))//check name of sdcard from file manager.
{
if(file.isDirectory())
{
f = file.listFiles();
}
}
}