static void AssertStorageVolume(StorageVolume storageVolume, StorageVolumeOptions options)
{
AssertContainer(storageVolume, options);
Assert.AreEqual(storageVolume.StorageUsed, options.StorageUsed);
Assert.AreEqual(storageVolume.StorageTotal, options.StorageTotal);
Assert.AreEqual(storageVolume.StorageFree, options.StorageFree);
Assert.AreEqual(storageVolume.StorageMedium, options.StorageMedium);
}
/// <summary>
/// liefert die akt. Daten des Volumes (API level 24 / Nougat / 7.0)
/// </summary>
/// <param name="volumeno">Nummer des gewünschten Volumes (wenn nicht vorhanden, wird nur die Volumeanzahl geliefert)</param>
/// <returns></returns>
public VolumeData GetVolumeData(int volumeno)
{
VolumeData data = new VolumeData {
VolumeNo = volumeno
};
if (volumeno >= 0)
{
StorageManager sm = GetStorageManager();
if (sm != null)
{
if (global::Android.OS.Build.VERSION.SdkInt >= global::Android.OS.BuildVersionCodes.N) // "Nougat", 7.0
{
data.Volumes = sm.StorageVolumes.Count;
if (0 <= volumeno && volumeno < data.Volumes)
{
StorageVolume sv = sm.StorageVolumes[volumeno];
data.IsPrimary = sv.IsPrimary;
data.IsRemovable = sv.IsRemovable;
data.IsEmulated = sv.IsEmulated;
data.Path = Path4StorageVolume(sv);
data.State = GetVolumeState(sv.State);
data.Description = sv.GetDescription(global::Android.App.Application.Context);
data.Name = data.IsPrimary ? ROOT_ID_PRIMARY_EMULATED : sv.Uuid;
try {
StatFs statfs = new StatFs(data.Path);
data.AvailableBytes = statfs.AvailableBytes;
data.TotalBytes = statfs.TotalBytes;
} catch {
data.TotalBytes = data.AvailableBytes = 0;
}
}
}
}
}
else // Daten des internal Storage holen
{
data.IsPrimary = false;
data.IsRemovable = false;
data.IsEmulated = false;
data.Path = System.Environment.GetFolderPath(System.Environment.SpecialFolder.UserProfile); // == Xamarin.Essentials.FileSystem.AppDataDirectory;
data.Path = data.Path.Substring(0, data.Path.LastIndexOf(Path.DirectorySeparatorChar));
data.State = VolumeState.MEDIA_MOUNTED;
data.Description = "intern";
data.Name = "intern";
try {
StatFs statfs = new StatFs(global::Android.OS.Environment.RootDirectory.CanonicalPath);
data.AvailableBytes = statfs.AvailableBytes;
data.TotalBytes = statfs.TotalBytes;
} catch {
data.TotalBytes = data.AvailableBytes = 0;
}
}
return(data);
}
public void StorageVolumeInstantiation()
{
var options = new StorageVolumeOptions();
SetStorageVolumeOptions(options);
var storage_volume = new StorageVolume("-1", "-1", options);
AssertStorageVolume(storage_volume, options);
AssertStorageVolume(storage_volume, storage_volume.GetOptions());
}
/// <summary>
/// Hilfsfunktion für <see cref="global::Android.OS.Storage.StorageVolume"/>: die Methode getPath() ist z.Z. noch nicht umgesetzt und wird per JNI realisiert (API level 24 / Nougat / 7.0)
/// </summary>
/// <param name="sv"></param>
/// <returns></returns>
string Path4StorageVolume(StorageVolume sv)
{
string path = "";
try {
// http://journals.ecs.soton.ac.uk/java/tutorial/native1.1/implementing/method.html
IntPtr methodID = JNIEnv.GetMethodID(sv.Class.Handle, "getPath", "()Ljava/lang/String;");
IntPtr lref = JNIEnv.CallObjectMethod(sv.Handle, methodID);
using (var value = new Java.Lang.Object(lref, JniHandleOwnership.TransferLocalRef)) {
path = value.ToString();
}
} catch {
path = "";
}
return(path);
}
