public override void OnBackPressed()
{
Fragment currentFragment = SupportFragmentManager.FindFragmentByTag(CurrentContentFragmentTag);
if (currentFragment is WebViewFragment)
{
WebViewFragment webFragment = (WebViewFragment)currentFragment;
if (webFragment.OnBackPressed())
{
return;
}
}
base.OnBackPressed();
}
public void UpdateContent(Uri uri)
{
Fragment fragment;
string tag;
FragmentManager fm = SupportFragmentManager;
FragmentTransaction tr = fm.BeginTransaction();
if (CurrentContentFragmentTag != null)
{
Fragment currentFragment = fm.FindFragmentByTag(CurrentContentFragmentTag);
if (currentFragment != null)
{
tr.Hide(currentFragment);
}
}
if (AboutFragment.ABOUT_URI.Equals(uri))
{
tag = AboutFragment.TAG;
Fragment foundFragment = fm.FindFragmentByTag(tag);
if (foundFragment != null)
{
fragment = foundFragment;
}
else
{
fragment = new AboutFragment();
}
}
else if (SandboxFragment.SETTINGS_URI.Equals(uri))
{
tag = SandboxFragment.TAG;
SandboxFragment foundFragment = (SandboxFragment)fm.FindFragmentByTag(tag);
if (foundFragment != null)
{
foundFragment.onSettingsChangedListener = mSettingsChangedListener;
fragment = foundFragment;
}
else
{
SandboxFragment settingsFragment = new SandboxFragment();
settingsFragment.onSettingsChangedListener = mSettingsChangedListener;
fragment = settingsFragment;
}
}
else if (uri != null)
{
tag = WebViewFragment.TAG;
WebViewFragment webViewFragment;
Fragment foundFragment = fm.FindFragmentByTag(tag);
if (foundFragment != null)
{
fragment = foundFragment;
webViewFragment = (WebViewFragment)fragment;
}
else
{
webViewFragment = new WebViewFragment();
fragment = webViewFragment;
}
webViewFragment.Url = uri.ToString();
}
else
{
return;
}
if (fragment.IsAdded)
{
tr.Show(fragment);
}
else
{
tr.Add(Resource.Id.content, fragment, tag);
}
tr.Commit();
CurrentUri = uri;
CurrentContentFragmentTag = tag;
}