Xamarin形式的自定义键盘 [英] Custom Keyboard in Xamarin forms
问题描述
我已经阅读了论坛和StackOverflow上的许多帖子以及制作自定义键盘的其他地方，但是还没有找到一种适用于我的Xamarin表单跨平台项目的方法.它是通过程序生成的.
I've read the many posts on the forum and on StackOverflow and other places on making custom keyboards, but have not found an approach that will work for my Xamarin forms cross-platform project. It is programmatically generated.
例如，我构建了推荐在多个地方使用的键盘:
For example, I built this keyboard that was recommended in several places:
我尝试将其集成到我的Xamarin表单应用程序中，但无法做到这一点
I try to integrate this into my Xamarin forms app but not able to do this
https://github.com/Vaikesh/CustomKeyboard/blob/master/CustomKeyboard/Activity1.cs
它可以独立运行
我要在我的应用程序中使用Hebrew language keyboard
I want Hebrew language keyboard in my application Like this
我将不胜感激.
谢谢.
推荐答案
Xamarin表单中的自定义键盘
Custom Keyboard in Xamarin forms
您可以创建一个PageRenderer并使用本机.axml布局文件来创建自定义的Keyboard.
You could create a PageRenderer and use native .axml layout file to create the custom Keyboard.
例如，我的KeyboardPageRenderer:
[assembly: ExportRenderer(typeof(MyKeyboardPage), typeof(KeyboardPageRenderer))]
...
public class KeyboardPageRenderer : PageRenderer
{
public CustomKeyboardView mKeyboardView;
public EditText mTargetView;
public Android.InputMethodServices.Keyboard mKeyboard;
Activity activity;
global::Android.Views.View view;
protected override void OnElementChanged(ElementChangedEventArgs<Page> e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
{
return;
}
try
{
SetupUserInterface();
SetupEventHandlers();
this.AddView(view);
}
catch (System.Exception ex)
{
System.Diagnostics.Debug.WriteLine(@" ERROR: ", ex.Message);
}
}
void SetupUserInterface()
{
activity = this.Context as Activity;
view = activity.LayoutInflater.Inflate(Resource.Layout.activity_keyboard, this, false);
mKeyboard = new Android.InputMethodServices.Keyboard(Context, Resource.Xml.keyboard);
mTargetView = view.FindViewById<EditText>(Resource.Id.target);
mKeyboardView = view.FindViewById<CustomKeyboardView>(Resource.Id.keyboard_view);
mKeyboardView.Keyboard = mKeyboard;
}
void SetupEventHandlers()
{
mTargetView.Touch += (sender, e) =>
{
ShowKeyboardWithAnimation();
e.Handled = false;
mTargetView.ShowSoftInputOnFocus = false;
};
mKeyboardView.Key += async (sender, e) =>
{
long eventTime = JavaSystem.CurrentTimeMillis();
KeyEvent ev = new KeyEvent(eventTime, eventTime, KeyEventActions.Down, e.PrimaryCode, 0, 0, 0, 0, KeyEventFlags.SoftKeyboard | KeyEventFlags.KeepTouchMode);
DispatchKeyEvent(ev);
await Task.Delay(1);
mTargetView.RequestFocus();
};
}
public void ShowKeyboardWithAnimation()
{
if (mKeyboardView.Visibility == ViewStates.Gone)
{
mKeyboardView.Visibility = ViewStates.Visible;
Android.Views.Animations.Animation animation = AnimationUtils.LoadAnimation(
Context,
Resource.Animation.slide_in_bottom
);
mKeyboardView.ShowWithAnimation(animation);
}
}
protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
base.OnLayout(changed, l, t, r, b);
var msw = MeasureSpec.MakeMeasureSpec(r - l, MeasureSpecMode.Exactly);
var msh = MeasureSpec.MakeMeasureSpec(b - t, MeasureSpecMode.Exactly);
view.Measure(msw, msh);
view.Layout(0, 0, r - l, b - t);
}
}
效果:
.
我写了一个有关如何实现此功能的简单演示，您可以在 GitHub存储库.
I wrote up a simple demo about how to implement this feature, you can see it in this GitHub Repository.
我不知道希伯来语，如果您需要实现所发布图片的效果，则需要在keyboard.xml文件中自定义布局.
I don't know Hebrew, if you need to achieve the effect like the picture you have post, you need custom the layout in keyboard.xml file.
我已经使用条目渲染完成了iOS部分，所以只尝试对android部分做
I am done iOS portion using entry render so only try to do for android portion
我编写了EntryRenderer来实现此功能，效果类似于此，希望这可以帮助您.
I write a EntryRenderer to implement this feature, effect like this, hope this can help you.
public class MyEntry2Renderer : ViewRenderer<MyEntry, TextInputLayout>,
ITextWatcher,
TextView.IOnEditorActionListener
{
private bool _hasFocus;
public CustomKeyboardView mKeyboardView;
public Android.InputMethodServices.Keyboard mKeyboard;
ViewGroup activityRootView;
protected EditText EditText => Control.EditText;
public bool OnEditorAction(TextView v, ImeAction actionId, KeyEvent e)
{
if ((actionId == ImeAction.Done) || ((actionId == ImeAction.ImeNull) && (e.KeyCode == Keycode.Enter)))
{
Control.ClearFocus();
//HideKeyboard();
((IEntryController)Element).SendCompleted();
}
return true;
}
public virtual void AfterTextChanged(IEditable s)
{
}
public virtual void BeforeTextChanged(ICharSequence s, int start, int count, int after)
{
}
public virtual void OnTextChanged(ICharSequence s, int start, int before, int count)
{
if (string.IsNullOrWhiteSpace(Element.Text) && (s.Length() == 0)) return;
((IElementController)Element).SetValueFromRenderer(Entry.TextProperty, s.ToString());
}
protected override TextInputLayout CreateNativeControl()
{
var textInputLayout = new TextInputLayout(Context);
var editText = new EditText(Context);
#region Add the custom Keyboard in your Page
var activity = Forms.Context as Activity;
var rootView = activity.Window.DecorView.FindViewById(Android.Resource.Id.Content);
activity.Window.SetSoftInputMode(SoftInput.StateAlwaysHidden);
activityRootView = ((ViewGroup)rootView).GetChildAt(0) as ViewGroup;
mKeyboardView = new CustomKeyboardView(Forms.Context, null);
Android.Widget.RelativeLayout.LayoutParams layoutParams =
new Android.Widget.RelativeLayout.LayoutParams(LayoutParams.MatchParent, LayoutParams.WrapContent); // or wrap_content
layoutParams.AddRule(LayoutRules.AlignParentBottom);
activityRootView.AddView(mKeyboardView, layoutParams);
#endregion
//First open the current page, hide the Keyboard
mKeyboardView.Visibility = ViewStates.Gone;
//Use the custom Keyboard
mKeyboard = new Android.InputMethodServices.Keyboard(Context, Resource.Xml.keyboard2);
mKeyboardView.Keyboard = mKeyboard;
mKeyboardView.Key += async (sender, e) =>
{
long eventTime = JavaSystem.CurrentTimeMillis();
KeyEvent ev = new KeyEvent(eventTime, eventTime, KeyEventActions.Down, e.PrimaryCode, 0, 0, 0, 0, KeyEventFlags.SoftKeyboard | KeyEventFlags.KeepTouchMode);
DispatchKeyEvent(ev);
await Task.Delay(1);
};
textInputLayout.AddView(editText);
return textInputLayout;
}
protected override void OnElementChanged(ElementChangedEventArgs<MyEntry> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
if (Control != null)
EditText.FocusChange -= ControlOnFocusChange;
if (e.NewElement != null)
{
var ctrl = CreateNativeControl();
SetNativeControl(ctrl);
EditText.ShowSoftInputOnFocus = false;
EditText.FocusChange += ControlOnFocusChange;
}
}
private void ControlOnFocusChange(object sender, FocusChangeEventArgs args)
{
_hasFocus = args.HasFocus;
if (_hasFocus)
{
EditText.Post(() =>
{
EditText.RequestFocus();
ShowKeyboardWithAnimation();
});
}
else
{
//Hide the Keyboard
mKeyboardView.Visibility = ViewStates.Gone;
}
}
public void ShowKeyboardWithAnimation()
{
if (mKeyboardView.Visibility == ViewStates.Gone)
{
mKeyboardView.Visibility = ViewStates.Visible;
Android.Views.Animations.Animation animation = AnimationUtils.LoadAnimation(
Context,
Resource.Animation.slide_in_bottom
);
mKeyboardView.ShowWithAnimation(animation);
}
}
}
这篇关于Xamarin形式的自定义键盘的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
