问题
Link :I worked on based on this Link
I added this line to find the size (both Internal and External) size,
return availableExternalMemorySize/(1024*1024);
I tested in my Tablet. I am getting both Internal and External SD card size as,
In Internal Storage:
- Total Memory --1007
- Available Memory --683
In External Storage:
- Total Memory -- 1763
- Available Memory -- 1554
But in Tablet, I saw settings. An External Storage size has 8GB. But it is showing me 1.7 GB around when I tested via programmatically.
What is the procedure to find an External storage size?
回答1:
To get the external SD card's available "free" space to show a number which agrees with the Menu->Settings->SD card and phone storage's number, use the following code:
StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
double sdAvailSize = (double)stat.getAvailableBlocks()
* (double)stat.getBlockSize();
//One binary gigabyte equals 1,073,741,824 bytes.
double gigaAvailable = sdAvailSize / 1073741824;
Here is how you get internal storage sizes:
StatFs statFs = new StatFs(Environment.getRootDirectory().getAbsolutePath());
long blockSize = statFs.getBlockSize();
long totalSize = statFs.getBlockCount()*blockSize;
long availableSize = statFs.getAvailableBlocks()*blockSize;
long freeSize = statFs.getFreeBlocks()*blockSize;
Here is how you get external storage sizes (SD card size):
StatFs statFs = new StatFs(Environment.getExternalStorageDirectory().getAbsolutePath());
long blockSize = statFs.getBlockSize();
long totalSize = statFs.getBlockCount()*blockSize;
long availableSize = statFs.getAvailableBlocks()*blockSize;
long freeSize = statFs.getFreeBlocks()*blockSize;
Short note
Free blocks:
The total number of blocks that are free on the file system, including reserved blocks (that are not available to normal applications).
Available blocks:
The number of blocks that are free on the file system and available to applications.
Here is how to detect whether SD card is mounted:
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state))
{
// We can read and write the media
}
else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state))
{
// We can only read the media
}
else
{
// No external media
}
Relevant documentation: http://developer.android.com/reference/android/os/StatFs.html
回答2:
You can use getTotalSpace (), getFreeSpace () or getUsableSpace () https://developer.android.com/reference/java/io/File.html
import java.io.File;
import android.util.Log;
....
File f = getMyFile();
Log.d("MyApp", f.getTotalSpace()+"");
....
回答3:
Use the
following code
it may
help
public void getInternalmemorySize() {
StatFs stat_fs = new StatFs(Environment.getExternalStorageDirectory().getPath());
double avail_sd_space = (double) stat_fs.getAvailableBlocksLong() * (double) stat_fs.getBlockSizeLong();
double GB_Available = (avail_sd_space / 1073741824);
double GBTotal = ((double) stat_fs.getBlockCountLong() * (double) stat_fs.getBlockSizeLong()) / 1073741824;
SDCardCheck();
Log.e("Memory", "Available MB Internal: " + GB_Available + "---" + GBTotal);
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
static String getExternalSdCardSize() {
File storage = new File("/storage");
String external_storage_path = "";
String size = "";
if (storage.exists()) {
File[] files = storage.listFiles();
for (File file : files) {
if (file.exists()) {
try {
if (Environment.isExternalStorageRemovable(file)) {
// storage is removable
external_storage_path = file.getAbsolutePath();
break;
}
} catch (Exception e) {
e.printStackTrace();
Log.e("TAG", e.toString());
}
}
}
}
if (!external_storage_path.isEmpty()) {
File external_storage = new File(external_storage_path);
if (external_storage.exists()) {
size = totalSize(external_storage);
}
}
return size;
}
private static String totalSize(File file) {
StatFs stat = new StatFs(file.getPath());
long blockSize, totalBlocks;
long avaiblockSize, availableBlocks;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
blockSize = stat.getBlockSizeLong();
totalBlocks = stat.getBlockCountLong();
avaiblockSize = stat.getAvailableBlocksLong();
availableBlocks = stat.getBlockSizeLong();
} else {
blockSize = stat.getBlockSize();
totalBlocks = stat.getBlockCount();
avaiblockSize = stat.getAvailableBlocks();
availableBlocks = stat.getBlockSize();
}
Log.e("Memory", "Memory--external--" + (double) (blockSize * totalBlocks) / 1073741824 + "---" + (double) (avaiblockSize * availableBlocks) / 1073741824);
return formatSize(totalBlocks * blockSize);
}
private static String formatSize(long size) {
String suffix = null;
if (size >= 1024) {
suffix = "KB";
size /= 1024;
if (size >= 1024) {
suffix = "MB";
size /= 1024;
}
}
size = size / 1024;
StringBuilder resultBuilder = new StringBuilder(Long.toString(size));
int commaOffset = resultBuilder.length() - 3;
while (commaOffset > 0) {
resultBuilder.insert(commaOffset, ',');
commaOffset -= 3;
}
if (suffix != null)
resultBuilder.append(suffix);
return resultBuilder.toString();
}
Ther is
some calculation
behalf of
these Methods.
StructStatVfs[
f_bavail=81523,
f_bfree=81523,
f_blocks=242304,
f_bsize=32768,
f_favail=0,
f_ffree=0,
f_files=0,
f_flag=1038,
f_frsize=32768,
f_fsid=0,
f_namemax=1530
]
StructStatVfs[
f_bavail=1633375,
f_bfree=1641567,
f_blocks=3134770,
f_bsize=4096,
f_favail=767939,
f_ffree=767939,
f_files=804672,
f_flag=1038,
f_frsize=4096,
f_fsid=0,
f_namemax=255
]
Internal-
3134770*4096/1024*1024*1024=11.957.10 1633375*4096/1024*1024*1024=6.23
External-
81523*32768/1024*1024*1024=2.487 242304*32768/1024*1024*1024=7.39
回答4:
In order to account for the deprecation and cross-availability, I've made these methods.
public static long sdCardFree_bytes() {
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long free_memory = 0; //return value is in bytes
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
free_memory = stat.getAvailableBlocksLong() * stat.getBlockSizeLong();
} else {
free_memory = stat.getAvailableBlocks() * stat.getBlockSize();
}
return free_memory;
}
public static long sdCardUsed_bytes() {
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long free_memory = 0;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
free_memory = (stat.getBlockCountLong() - stat.getAvailableBlocksLong()) * stat.getBlockSizeLong(); //return value is in bytes
} else {
free_memory = (stat.getBlockCount() - stat.getAvailableBlocks()) * stat.getBlockSize(); //return value is in bytes
}
return free_memory;
}
public static long sdCardTotal_bytes() {
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long free_memory = 0;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
free_memory = stat.getBlockCountLong() * stat.getBlockSizeLong(); //return value is in bytes
} else {
free_memory = stat.getBlockCount() * stat.getBlockSize(); //return value is in bytes
}
return free_memory;
}
来源：https://stackoverflow.com/questions/16834964/how-to-get-an-external-storage-sd-card-size-with-mounted-sd-card