wislon / xamarin-android-use-removable-sd-card

Xamarin.Android: Access Your External, REMOVABLE SD Card

Xamarin.Android: Use your removable SD card (KitKat+ too!)

Demonstrates how to how to access the 'external', REMOVABLE SD card plugged into your Android device.

The code example is done in C#, but exactly the same principles apply in Java, so it should be extremely easy for an Android Java dev to understand exactly what's going on.

Background

There's been a lot of questions on StackOverflow (and other places) about how to access the 'External Storage' on an Android device. Most people seem to want to know how to read from (and write to) the SD card the've plugged into the SD card slot in their device.

This sample project shows you how to do just that.

For more details, there's two blog posts about this that I've put together;

• http://blog.wislon.io/posts/2014/09/28/xamarin-and-android-how-to-use-your-external-removable-sd-card - how to figure out where it is, and access it pre-KitKat
• http://blog.wislon.io/posts/2014/11/20/xamarin-and-android-kitkat-and-your-external-sd-card - how to get access to it in KitKat and above, with some notes about backward compatibility.

Everything in here is released as OSS under the MIT license, so feel free to use it any way you like.

xamarin-android-use-removable-sd-card's Issues

error if no external sdcard on android 5.1

in the public class ExternalSdStorageHelper on a lenovo tab yoga 3LT with no sdcard installed,

externalFilesDirs return 2 lines

• the first : {Java.IO.File}
• the second is null

string externalSdPath = externalFilesDirs.Length > 1 ? externalFilesDirs[1].AbsolutePath : string.Empty; // we only want the external drive, otherwise nothing!

return an error

*You can replace this line with *

                string externalSdPath;
                if (externalFilesDirs.Length > 1)
                {
                    if (externalFilesDirs[1] != null)
                    {
                        // we only want the external drive, otherwise nothing!
                        externalSdPath = externalFilesDirs[1].AbsolutePath;
                    }
                    else
                    {
                        externalSdPath = string.Empty;
                    }
                }
                else
                {
                    externalSdPath = string.Empty;
                }