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using System;
using System.Collections.Generic;
using Android.App;
using Android.Content;
using Android.Webkit;
using Object = Java.Lang.Object;
namespace Xamarin.Forms.Platform.Android
{
public class FormsWebChromeClient : WebChromeClient
{
IStartActivityForResult _context;
List<int> _requestCodes;
public override bool OnShowFileChooser(global::Android.Webkit.WebView webView, IValueCallback filePathCallback, FileChooserParams fileChooserParams)
{
base.OnShowFileChooser(webView, filePathCallback, fileChooserParams);
return ChooseFile(filePathCallback, fileChooserParams.CreateIntent(), fileChooserParams.Title);
}
public void UnregisterCallbacks()
{
if (_requestCodes == null || _requestCodes.Count == 0 || _context == null)
return;
foreach (int requestCode in _requestCodes)
_context.UnregisterActivityResultCallback(requestCode);
_requestCodes = null;
}
protected bool ChooseFile(IValueCallback filePathCallback, Intent intent, string title)
{
Action<Result, Intent> callback = (resultCode, intentData) =>
{
if (filePathCallback == null)
return;
Object result = ParseResult(resultCode, intentData);
filePathCallback.OnReceiveValue(result);
};
_requestCodes = _requestCodes ?? new List<int>();
int newRequestCode = _context.RegisterActivityResultCallback(callback);
_requestCodes.Add(newRequestCode);
_context.StartActivityForResult(Intent.CreateChooser(intent, title), newRequestCode);
return true;
}
protected override void Dispose(bool disposing)
{
if (disposing)
UnregisterCallbacks();
base.Dispose(disposing);
}
protected virtual Object ParseResult(Result resultCode, Intent data)
{
return FileChooserParams.ParseResult((int)resultCode, data);
}
internal void SetContext(IStartActivityForResult startActivityForResult)
{
if (startActivityForResult == null)
throw new ArgumentNullException(nameof(startActivityForResult));
_context = startActivityForResult;
}
}
}
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