Android obtient la taille libre de la mémoire interne/externe

Question

Je veux obtenir la taille de la mémoire libre sur le stockage interne/externe de mon appareil de manière programmatique. J'utilise ce morceau de code :

StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
long bytesAvailable = (long)stat.getBlockSize() *(long)stat.getBlockCount();
long megAvailable = bytesAvailable / 1048576;
Log.e("","Available MB : "+megAvailable);

File path = Environment.getDataDirectory();
StatFs stat2 = new StatFs(path.getPath());
long blockSize = stat2.getBlockSize();
long availableBlocks = stat2.getAvailableBlocks();
String format =  Formatter.formatFileSize(this, availableBlocks * blockSize);
Log.e("","Format : "+format);

et le résultat que j'obtiens est :

11-15 10:27:18.844: E/(25822): Available MB : 7572
11-15 10:27:18.844: E/(25822): Format : 869MB

Le problème est que je veux récupérer la mémoire libre de la SdCard qui est 1,96GB en ce moment. Comment puis-je corriger ce code pour obtenir la taille gratuite ?

Answer 1

@RequiresApi(api = Build.VERSION_CODES.O)
private void showStorageVolumes() {
    StorageStatsManager storageStatsManager = (StorageStatsManager) getSystemService(Context.STORAGE_STATS_SERVICE);
    StorageManager storageManager = (StorageManager) getSystemService(Context.STORAGE_SERVICE);
    if (storageManager == null || storageStatsManager == null) {
        return;
    }
    List<StorageVolume> storageVolumes = storageManager.getStorageVolumes();
    for (StorageVolume storageVolume : storageVolumes) {
        final String uuidStr = storageVolume.getUuid();
        final UUID uuid = uuidStr == null ? StorageManager.UUID_DEFAULT : UUID.fromString(uuidStr);
        try {
            Log.d("AppLog", "storage:" + uuid + " : " + storageVolume.getDescription(this) + " : " + storageVolume.getState());
            Log.d("AppLog", "getFreeBytes:" + Formatter.formatShortFileSize(this, storageStatsManager.getFreeBytes(uuid)));
            Log.d("AppLog", "getTotalBytes:" + Formatter.formatShortFileSize(this, storageStatsManager.getTotalBytes(uuid)));
        } catch (Exception e) {
            // IGNORED
        }
    }
}

La classe StorageStatsManager a été introduite dans les versions Android O et supérieures. Elle permet de connaître le nombre d'octets libres et le nombre total d'octets dans le stockage externe ou interne. Pour plus de détails avec le code source, vous pouvez lire mon article suivant. Vous pouvez utiliser la réflexion pour les versions inférieures à Android O.

https://medium.com/cashify-engineering/how-to-get-storage-stats-in-Android-o-api-26-4b92eca6805b

Answer 2

Après avoir vérifié différentes solutions, j'ai écrit le code moi-même. Voici le code complet pour la recherche.

• Mémoire externe totale
• Mémoire externe libre
• Mémoire externe utilisée
• Mémoire interne TotaL
• Mémoire interne utilisée
• Mémoire interne libre

''''

object DeviceMemoryUtil {
private const val error: String = "Something went wrog"
private const val noExternalMemoryDetected = "No external Storage detected"
private var totalExternalMemory: Long = 0
private var freeExternalMemory: Long = 0
private var totalInternalStorage: Long = 0
private var freeInternalStorage: Long = 0

/**
 * Checks weather external memory is available or not
 */
private fun externalMemoryAvailable(): Boolean {
    return Environment.getExternalStorageState() ==
            Environment.MEDIA_MOUNTED
}

/**
 *Gives total external memory
 * @return String Size of external memory
 * @return Boolean True if memory size is returned
 */
fun getTotalExternalMemorySize(): Pair<String?, Boolean> {
    val dirs: Array<File> = ContextCompat.getExternalFilesDirs(CanonApplication.getCanonAppInstance(), null)
    return if (externalMemoryAvailable()) {
        if (dirs.size > 1) {
            val stat = StatFs(dirs[1].path)
            val blockSize = stat.blockSizeLong
            val totalBlocks = stat.blockCountLong
            var totalExternalSize = totalBlocks * blockSize
            totalExternalMemory = totalExternalSize
            Pair(formatSize(totalExternalSize), true)
        } else {
            Pair(error, false)
        }
    } else {
        Pair(noExternalMemoryDetected, false)
    }
}

/**
 * Gives free external memory size
 * @return String Size of free external memory
 * @return Boolean True if memory size is returned
 */
fun getAvailableExternalMemorySize(): Pair<String?, Boolean> {
    val dirs: Array<File> = ContextCompat.getExternalFilesDirs(CanonApplication.getCanonAppInstance(), null)
    if (externalMemoryAvailable()) {
        return if (dirs.size > 1) {
            val stat = StatFs(dirs[1].path)
            val blockSize = stat.blockSizeLong
            val availableBlocks = stat.availableBlocksLong
            var freeExternalSize = blockSize * availableBlocks
            freeExternalMemory = freeExternalSize
            Pair(formatSize(freeExternalSize), true)
        } else {
            Pair(error, false)
        }
    } else {
        return Pair(noExternalMemoryDetected, false)
    }
}

/**
 * Gives used external memory size
 *  @return String Size of used external memory
 * @return Boolean True if memory size is returned
 */
fun getUsedExternalMemorySize(): Pair<String?, Boolean> {
    return if (externalMemoryAvailable()) {
        val totalExternalSize = getTotalExternalMemorySize()
        val freeExternalSize = getAvailableExternalMemorySize()
        if (totalExternalSize.second && freeExternalSize.second) {
            var usedExternalVolume = totalExternalMemory - freeExternalMemory
            Pair(formatSize(usedExternalVolume), true)
        } else {
            Pair(error, false)
        }
    } else {
        Pair(noExternalMemoryDetected, false)
    }
}

/**
 *Formats the long to size of memory in gb,mb etc.
 * @param size Size of memory
 */
fun formatSize(size: Long): String? {
    return android.text.format.Formatter.formatFileSize(CanonApplication.getCanonAppInstance(), size)
}

/**
 * Gives total internal memory size
 *  @return String Size of total internal memory
 * @return Boolean True if memory size is returned
 */
fun getTotalInternalStorage(): Pair<String?, Boolean> {
    if (showStorageVolumes()) {
        return Pair(formatSize(totalInternalStorage), true)
    } else {
        return Pair(error, false)
    }

}

/**
 * Gives free or available internal memory size
 *  @return String Size of free internal memory
 * @return Boolean True if memory size is returned
 */
fun getFreeInternalStorageVolume(): Pair<String?, Boolean> {
    return if (showStorageVolumes()) {
        Pair(formatSize(freeInternalStorage), true)
    } else {
        Pair(error, false)
    }
}

/**
 *For calculation of internal storage
 */
private fun showStorageVolumes(): Boolean {
    val storageManager = CanonApplication.canonApplicationInstance.applicationContext.getSystemService(Context.STORAGE_SERVICE) as StorageManager
    val storageStatsManager = CanonApplication.canonApplicationInstance.applicationContext.getSystemService(Context.STORAGE_STATS_SERVICE) as StorageStatsManager
    if (storageManager == null || storageStatsManager == null) {
        return false
    }
    val storageVolumes: List<StorageVolume> = storageManager.storageVolumes
    for (storageVolume in storageVolumes) {
        var uuidStr: String? = null
        storageVolume.uuid?.let {
            uuidStr = it
        }
        val uuid: UUID = if (uuidStr == null) StorageManager.UUID_DEFAULT else UUID.fromString(uuidStr)
        return try {
            freeInternalStorage = storageStatsManager.getFreeBytes(uuid)
            totalInternalStorage = storageStatsManager.getTotalBytes(uuid)
            true
        } catch (e: Exception) {
            // IGNORED
            false
        }
    }
    return false
}

fun getTotalInternalExternalMemory(): Pair<Long?, Boolean> {
    if (externalMemoryAvailable()) {
        if (getTotalExternalMemorySize().second) {
            if (getTotalInternalStorage().second) {
                return Pair(totalExternalMemory + totalInternalStorage, true)
            } else {
                return Pair(0, false)
            }
        }
        return Pair(0, false)
    } else {
        if (getTotalInternalStorage().second) {
            return Pair(totalInternalStorage, true)
        } else {
            return Pair(0, false)
        }
    }

}

fun getTotalFreeStorage(): Pair<Long,Boolean> {
    if (externalMemoryAvailable()){
        if(getFreeInternalStorageVolume().second){
            getFreeInternalStorageVolume()
            getAvailableExternalMemorySize()
                return Pair(freeExternalMemory + freeInternalStorage,true)
        }
        else{
            return Pair(0,false)
        }
    }
    else {
        if (getFreeInternalStorageVolume().second){
            getFreeInternalStorageVolume()
            return Pair(freeInternalStorage,true)
        }
      else{
            return Pair(0,false)
        }
    }

}}

Answer 3

Pour ce qui est de la mémoire externe, il existe un autre moyen :
File external = Environment.getExternalStorageDirectory(); free:external.getFreeSpace(); total:external.getTotalSpace();