Xamarin forms: How to create folder and a file in device internal storage?

Question

I am trying to create a directory and pdf file in the internal memory of the device

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

You can use dependenceService to create a folder and a file in device internal storage.

First, create an interface in your PCL.

   public interface IMyFile  
       {  
           void CreateFileDirectory();  
       }  

Invoke this dependenceService in button click event or other method.

   private void Button_Clicked(object sender, EventArgs e)  
           {  
               DependencyService.Get<IMyFile>().CreateFileDirectory();  
           }  

Then achieve it in Android folder.

   using Android.App;  
   using Android.Content;  
   using Android.OS;  
   using Android.Runtime;  
   using Android.Util;  
   using Android.Views;  
   using Android.Widget;  
   using JanpanLabel.Droid;  
   using Java.IO;  
   using System;  
   using System.Collections.Generic;  
   using System.Linq;  
   using System.Text;  
   using Xamarin.Forms;  
     
   [assembly: Dependency(typeof(MyFileService))]  
   namespace JanpanLabel.Droid  
   {  
       class MyFileService : IMyFile  
       {  
           public void CreateFileDirectory()  
           {  
               //  throw new NotImplementedException();  
              // var backingFile = Path.Combine(, "count.txt");  
               File file = new File(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal).ToString(), "/Myfolder/ount.pdf");  
               if (!file.Exists())  
               {  
                   if (!file.Mkdirs())  
                   {  
                       Log.Warn("TravellerLog :: ", "Problem creating Myfolder and pdf file");  
                       //ret = false;  
                   }  
               }  
           }  
       }  
   }  

We cannot check the folder and a file directly in VS, but we can use android studio's device file explorer, open the data/data/com.company.packagename/. this folder and file is created like following screenshot.

Best Regards,

Leon Lu

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