How To Get The Total Internal Storage Size Including System Usage In Android (Kotlin)?
Introduction
When developing a file manager app in Kotlin, it's essential to provide users with accurate information about the available storage space on their device. However, the StatFs class in Android only returns the free space, excluding the space occupied by the system. In this article, we'll explore how to retrieve the total internal storage size, including the space used by the system, using Kotlin.
Understanding the Problem
The StatFs class is a part of the Android API that provides information about the file system. However, it only returns the free space, which is not sufficient for our requirements. We need to find a way to get the total internal storage size, including the space occupied by the system.
Using the StatFs Class
As you mentioned, you've tried using the StatFs class:
val stat = StatFs("/mnt/sdcard")
val blockSize = stat.blockSizeLong
val totalBlocks = stat.totalBlocksLong
val availableBlocks = stat.availableBlocksLong
However, this will only give you the free space, excluding the space occupied by the system.
Using the Environment Class
The Environment class provides a way to get the root directory of the internal storage. We can use this to get the total size of the internal storage, including the space occupied by the system:
val rootDir = Environment.getExternalStorageDirectory()
val stat = StatFs(rootDir.path)
val blockSize = stat.blockSizeLong
val totalBlocks = stat.totalBlocksLong
val availableBlocks = stat.availableBlocksLong
val totalSize = blockSize * totalBlocks
val availableSize = blockSize * availableBlocks
However, this will still not give us the total size of the internal storage, including the space occupied by the system.
Using the Process Class
The Process class provides a way to get the total size of the internal storage, including the space occupied by the system:
val process = ProcessBuilder().command("df", "-k", "/mnt/sdcard").start()
val output = process.inputStream.bufferedReader().readText()
val lines = output.split("\n")
val totalSize = lines[1].split(" ").last().toLong()
However, this will only work on devices that have the df command available.
Using the StorageManager Class
The StorageManager class provides a way to get the total size of the internal storage, including the space occupied by the system:
val storageManager = getSystemService(Context.STORAGE_SERVICE) as StorageManager
val storageInfo = storageManager.getStorageInfo("/mnt/sdcard")
val totalSize = storageInfo.totalBytes
val availableSize = storageInfo.availableBytes
This is the most reliable way to get the total size of the internal storage, including the space occupied by the system.
Conclusion
In this article, we've explored how to retrieve the total internal storage size, including the space occupied by the system, using Kotlin. We've discussed the limitations of the StatFs class and explored alternative methods using the Environment, Process, and StorageManager classes. The StorageManager class is the most reliable way to get the total size of the internal storage, including the space occupied by the system.
Code Example
Here's a complete code example that demonstrates how to use the StorageManager class to get the total size of the internal storage, including the space occupied by the system:
import android.content.Context
import android.os.storage.StorageManager
class StorageUtil(private val context: Context)
fun getTotalSize()
}
class MainActivity : AppCompatActivity()
override fun onCreate(savedInstanceState
}
This code example demonstrates how to use the StorageUtil class to get the total size of the internal storage, including the space occupied by the system. The getTotalSize() method uses the StorageManager class to get the total size of the internal storage, and returns the result as a Long value.
Introduction
In our previous article, we explored how to retrieve the total internal storage size, including the space occupied by the system, using Kotlin. However, we received many questions from readers who were still unsure about how to implement this feature in their own apps. In this article, we'll answer some of the most frequently asked questions about getting the total internal storage size in Android.
Q: What is the best way to get the total internal storage size in Android?
A: The best way to get the total internal storage size in Android is to use the StorageManager class. This class provides a way to get the total size of the internal storage, including the space occupied by the system.
Q: Why can't I use the StatFs class to get the total internal storage size?
A: The StatFs class only returns the free space, excluding the space occupied by the system. This is not sufficient for our requirements, as we need to get the total size of the internal storage, including the space occupied by the system.
Q: How do I use the StorageManager class to get the total internal storage size?
A: To use the StorageManager class, you need to get an instance of the StorageManager class using the getSystemService() method. Then, you can use the getStorageInfo() method to get the total size of the internal storage, including the space occupied by the system.
Q: What is the difference between the getStorageInfo() method and the getTotalSize() method?
A: The getStorageInfo() method returns a StorageInfo object, which contains information about the storage, including the total size and available size. The getTotalSize() method returns only the total size of the internal storage, including the space occupied by the system.
Q: Can I use the StorageManager class to get the total size of the external storage?
A: Yes, you can use the StorageManager class to get the total size of the external storage. However, you need to use the getStorageInfo() method with the path of the external storage, such as /mnt/sdcard.
Q: How do I handle the case where the storage is not available?
A: You can use a try-catch block to handle the case where the storage is not available. If the getStorageInfo() method returns a null value, you can throw an exception or return a default value.
Q: Can I use the StorageManager class to get the total size of the storage in bytes?
A: Yes, you can use the getStorageInfo() method to get the total size of the storage in bytes. The totalBytes field of the StorageInfo object returns the total size of the storage in bytes.
Q: How do I use the StorageManager class in a fragment or activity?
A: To use the StorageManager class in a fragment or activity, you need to get an instance of the StorageManager class using the getSystemService() method. Then, you can use the getStorageInfo() method to get the total size of the internal storage, including the space occupied by the system.
Q: Can I use the StorageManager class to get the total size of the storage in a background thread?
A: Yes, you can use the StorageManager class to get the total size of the storage in a background thread. However, you need to make sure that the getStorageInfo() method is called on the main thread.
Q: How do I handle the case where the storage is not available in a background thread?
A: You can use a try-catch block to handle the case where the storage is not available in a background thread. If the getStorageInfo() method returns a null value, you can throw an exception or return a default value.
Conclusion
In this article, we've answered some of the most frequently asked questions about getting the total internal storage size in Android. We've discussed the best way to get the total internal storage size, how to use the StorageManager class, and how to handle the case where the storage is not available. We hope that this article has been helpful in answering your questions and providing you with the information you need to implement this feature in your own apps.