entityMap|blocks|key|1gigg|text|您需要重新检查ring1的路径。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|avf0d|我使用下载文件夹中的文件作为参考。它起作用了。|86vda|+var+ring1+=+System.IO.Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath,+Android.OS.Environment.DirectoryDownloads,+"sample.mp3");|code-block|syntax|javascript|a0a07|如果你想使用铃声的默认Uri，你可以使用下面的代码。|4af0q|++RingtoneManager.GetDefaultUri(RingtoneType.Ringtone)|7081f^0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|O|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|P|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|Q|9|@]|A|@]|B|$H|I]]|$2|J|4|K|6|7|8|R|9|@]|A|@]|B|$]]|$2|L|4|M|6|G|8|S|9|@]|A|@]|B|$H|I]]|$2|N|4|-4|6|7|8|T|9|@]|A|@]|B|$]]]]

You need to recheck the path of ring1.
I use the file in download folder for reference. It works.
<pre><code> var ring1 = System.IO.Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath, Android.OS.Environment.DirectoryDownloads, &quot;sample.mp3&quot;);
</code></pre>
If you want to use the default Uri of Ringtone, you could use the code below instead.
<pre><code> RingtoneManager.GetDefaultUri(RingtoneType.Ringtone)
</code></pre>

entityMap|blocks|key|15ptj|text|问题是在写权限时，我使用下面的代码检查文件是否存在，请求权限，并更改铃声和工作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|a66h5|var+newuri3+=+Android.Net.Uri.Parse("file:///storage/emulated/0/Ringtones/"+%2B+item.ringtone);
+++++++++++++++++++++++
++++++++++++++++++++++++var+newuri+=+newuri3;
++++++++++++++++++++++++bool+b+=+false;
++++++++++++++++++++++++if+(null+!=+newuri)
++++++++++++++++++++++++{
++++++++++++++++++++++++++++try
++++++++++++++++++++++++++++{
++++++++++++++++++++++++++++++++var+inputStream+=+Android.App.Application.Context.ContentResolver.OpenInputStream(newuri);
++++++++++++++++++++++++++++++++inputStream.Close();
++++++++++++++++++++++++++++++++Console.WriteLine("file+exist");
++++++++++++++++++++++++++++++++b+=+true;
++++++++++++++++++++++++++++}
++++++++++++++++++++++++++++catch+(Exception+e)
++++++++++++++++++++++++++++{
++++++++++++++++++++++++++++++++Console.WriteLine("File+corresponding+to+the+uri+does+not+exist+"+%2B+newuri.ToString());
++++++++++++++++++++++++++++}
++++++++++++++++++++++++}

++++++++++++++++++++++++var+bi+=+Settings.System.CanWrite(Android.App.Application.Context);
++++++++++++++++++++++++if+(bi)
++++++++++++++++++++++++{
++++++++++++++++++++++++++++Console.WriteLine("it+haw+write+permision");
++++++++++++++++++++++++}
++++++++++++++++++++++++else
++++++++++++++++++++++++{
++++++++++++++++++++++++++++Console.WriteLine("doenst+have+permision");
++++++++++++++++++++++++++++
++++++++++++++++++++++++++++

++++++++++++++++++++++++++++Intent+intent+=+new+Intent(Settings.ActionManageWriteSettings);
++++++++++++++++++++++++++++intent.SetData(Android.Net.Uri.Parse($"package:{Android.App.Application.Context.PackageName}"));
++++++++++++++++++++++++++++intent.AddFlags(ActivityFlags.NewTask);
++++++++++++++++++++++++++++Android.App.Application.Context.StartActivity(intent);

++++++++++++++++++++++++}

++++++++++++++++++++++

++++++++++++++++++++++++RingtoneManager.SetActualDefaultRingtoneUri(Android.App.Application.Context,+RingtoneType.Ringtone,+newuri);|code-block|syntax|javascript|c07s7|其中，item.ringtone是文件名，例如music.mp3|773vc^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|K|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|L|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|M|9|@]|A|@]|B|$]]|$2|J|4|-4|6|7|8|N|9|@]|A|@]|B|$]]]]

the problem was in write permisions i use the code below to check if the file exist ask for permision and change the ringtone and work
<pre><code>var newuri3 = Android.Net.Uri.Parse(&quot;file:///storage/emulated/0/Ringtones/&quot; + item.ringtone);
 
 var newuri = newuri3;
 bool b = false;
 if (null != newuri)
 {
 try
 {
 var inputStream = Android.App.Application.Context.ContentResolver.OpenInputStream(newuri);
 inputStream.Close();
 Console.WriteLine(&quot;file exist&quot;);
 b = true;
 }
 catch (Exception e)
 {
 Console.WriteLine(&quot;File corresponding to the uri does not exist &quot; + newuri.ToString());
 }
 }

 var bi = Settings.System.CanWrite(Android.App.Application.Context);
 if (bi)
 {
 Console.WriteLine(&quot;it haw write permision&quot;);
 }
 else
 {
 Console.WriteLine(&quot;doenst have permision&quot;);
 
 

 Intent intent = new Intent(Settings.ActionManageWriteSettings);
 intent.SetData(Android.Net.Uri.Parse($&quot;package:{Android.App.Application.Context.PackageName}&quot;));
 intent.AddFlags(ActivityFlags.NewTask);
 Android.App.Application.Context.StartActivity(intent);

 }

 

 RingtoneManager.SetActualDefaultRingtoneUri(Android.App.Application.Context, RingtoneType.Ringtone, newuri);
</code></pre>
where item.ringtone is the file name for example music.mp3

need to change default ringtone with xamarin
i use android.net.parse with path string and return null, then i use the bellow code where i find online and again return null anybody can help?
<pre><code>var ring1 = (&quot;file:////storage/emulated/0/Ringtones/&quot; + item.ringtone);
 ContentValues values = new ContentValues();
 
 values.Put(MediaStore.IMediaColumns.Data, ring1);
 values.Put(MediaStore.Audio.Media.InterfaceConsts.IsRingtone, true);
 values.Put(MediaStore.IMediaColumns.MimeType, &quot;audio/mp3&quot;);
 
 
 
 var uri = MediaStore.Audio.Media.GetContentUriForPath(path: ring1);
 
 
 Android.Net.Uri newUri = this.ContentResolver.Insert(uri, values);
 
 RingtoneManager.SetActualDefaultRingtoneUri(Android.App.Application.Context,RingtoneType.Ringtone, newUri);
</code></pre>
&quot;uri&quot; and &quot;values&quot; in debugging have values but parameter newUri is null

need to change default ringtone with xamarin

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 需要用xamarin更改默认铃声我使用带有路径字符串的android.net.parse并返回null，然后我使用下面的代码，我在网上找到并再次返回null有人可以帮助吗？ var ring1 = ("file:////storage/emulated/0/Ringtones/" + item.ringtone); ...

问需要使用xamarin更改默认铃声
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