有没有一种方法可以使用Kivy和Python在文本输入字段中显示数字键盘（最好是带气泡的）？代码的新问题

Question

我有一个应用程序，你可以输入数字（很多），而且键盘也很难输入字母，我希望它只是数字（0-9）和一个点。使用Kivy的.kv文件和Python有什么方法可以做到这一点吗？我在.kv文件中尝试了input_type: 'number'，但无法使其工作。谢谢

编辑： 我也试过用泡泡，运气不好。不过，如果可能的话，最好有一个泡泡数字垫

编辑2: 我在这个问题上提出了另一个悬赏，因为当我把VKeyboard放在一个物理设备上（连同一个弹出窗口）时，它会断开。具体来说，VKeyboard不会显示（在转到另一个TextInput字段后也会崩溃），并且我的弹出窗口不能正确缩放。我的日志如下所示

10-21 08:30:23.944 11210 11233 I python  : [INFO   ] [Logger      ] Record log in /data/user/0/org.test.bfcalc5/files/app/.kivy/logs/kivy_20-10-21_3.txt
10-21 08:30:23.944 11210 11233 I python  : [INFO   ] [Kivy        ] v1.11.1
10-21 08:30:23.945 11210 11233 I python  : [INFO   ] [Kivy        ] Installed at "/data/user/0/org.test.bfcalc5/files/app/_python_bundle/site-packages/kivy/__init__.pyc"
10-21 08:30:23.946 11210 11233 I python  : [INFO   ] [Python      ] v3.8.1 (default, Oct 18 2020, 14:08:48) 
10-21 08:30:23.946 11210 11233 I python  : [Clang 8.0.2 (https://android.googlesource.com/toolchain/clang 40173bab62ec7462
10-21 08:30:23.946 11210 11233 I python  : [INFO   ] [Python      ] Interpreter at ""
10-21 08:30:25.540 11210 11233 I python  : [INFO   ] [Factory     ] 184 symbols loaded
10-21 08:30:26.210 11210 11233 I python  : [INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_gif (img_pil, img_ffpyplayer ignored)
10-21 08:30:26.289 11210 11233 I python  : [INFO   ] [Text        ] Provider: sdl2
10-21 08:30:26.387 11210 11233 I python  : [INFO   ] [Window      ] Provider: sdl2
10-21 08:30:26.437 11210 11233 I python  : [INFO   ] [GL          ] Using the "OpenGL ES 2" graphics system
10-21 08:30:26.439 11210 11233 I python  : [INFO   ] [GL          ] Backend used <sdl2>
10-21 08:30:26.440 11210 11233 I python  : [INFO   ] [GL          ] OpenGL version <b'OpenGL ES 3.2 build 1.10@5187610'>
10-21 08:30:26.440 11210 11233 I python  : [INFO   ] [GL          ] OpenGL vendor <b'Imagination Technologies'>
10-21 08:30:26.441 11210 11233 I python  : [INFO   ] [GL          ] OpenGL renderer <b'PowerVR Rogue GE8322'>
10-21 08:30:26.442 11210 11233 I python  : [INFO   ] [GL          ] OpenGL parsed version: 3, 2
10-21 08:30:26.442 11210 11233 I python  : [INFO   ] [GL          ] Texture max size <4096>
10-21 08:30:26.443 11210 11233 I python  : [INFO   ] [GL          ] Texture max units <16>
10-21 08:30:26.482 11210 11233 I python  : [INFO   ] [Window      ] auto add sdl2 input provider
10-21 08:30:26.484 11210 11233 I python  : [INFO   ] [Window      ] virtual keyboard allowed, single mode, docked
10-21 08:30:26.756 11210 11233 I python  : [INFO   ] [GL          ] NPOT texture support is available
10-21 08:30:26.818 11210 11233 I python  : [WARNING] [Base        ] Unknown <android> provider
10-21 08:30:26.819 11210 11233 I python  : [INFO   ] [Base        ] Start application main loop
10-21 08:30:26.938 11210 11233 I python  : [WARNING] [GL          ] Unpack subimage support is not available
10-21 08:30:33.249 11210 11233 I python  : [INFO   ] [Base        ] Leaving application in progress...
10-21 08:30:33.250 11210 11233 I python  :  Traceback (most recent call last):
10-21 08:30:33.250 11210 11233 I python  :    File "/home/ubuntu/BFCalcApp/.buildozer/android/app/main.py", line 88, in <module>
10-21 08:30:33.251 11210 11233 I python  :    File "/home/ubuntu/BFCalcApp/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/bfcalc5/kivy/app.py", line 855, in run
10-21 08:30:33.253 11210 11233 I python  :    File "/home/ubuntu/BFCalcApp/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/bfcalc5/kivy/base.py", line 504, in runTouchApp
10-21 08:30:33.255 11210 11233 I python  :    File "/home/ubuntu/BFCalcApp/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/bfcalc5/kivy/core/window/window_sdl2.py", line 747, in mainloop
10-21 08:30:33.257 11210 11233 I python  :    File "/home/ubuntu/BFCalcApp/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/bfcalc5/kivy/core/window/window_sdl2.py", line 479, in _mainloop
10-21 08:30:33.258 11210 11233 I python  :    File "/home/ubuntu/BFCalcApp/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/bfcalc5/kivy/base.py", line 339, in idle
10-21 08:30:33.259 11210 11233 I python  :    File "/home/ubuntu/BFCalcApp/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/bfcalc5/kivy/clock.py", line 591, in tick
10-21 08:30:33.260 11210 11233 I python  :    File "kivy/_clock.pyx", line 384, in kivy._clock.CyClockBase._process_events
10-21 08:30:33.261 11210 11233 I python  :    File "kivy/_clock.pyx", line 414, in kivy._clock.CyClockBase._process_events
10-21 08:30:33.261 11210 11233 I python  :    File "kivy/_clock.pyx", line 412, in kivy._clock.CyClockBase._process_events
10-21 08:30:33.262 11210 11233 I python  :    File "kivy/_clock.pyx", line 154, in kivy._clock.ClockEvent.tick
10-21 08:30:33.263 11210 11233 I python  :    File "kivy/_clock.pyx", line 86, in kivy._clock.ClockEvent.get_callback
10-21 08:30:33.264 11210 11233 I python  :    File "/home/ubuntu/BFCalcApp/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/bfcalc5/kivy/weakmethod.py", line 56, in is_dead
10-21 08:30:33.265 11210 11233 I python  :  ReferenceError: weakly-referenced object no longer exists
10-21 08:30:33.266 11210 11233 I python  : Python for android ended.

编辑3: 多亏了法迪·阿布的突袭，我才能够找出弹出的问题。现在，我正在寻找增加键盘的大小，因为它在手机上非常小。我找到了this个帖子，但没有从中找到任何帮助

Answer 1

你能发一段代码吗？如果您查看文档，正如您所说，您可以使用属性输入类型：“number”来执行此操作，但可能您的实例化中缺少了某些内容，或者类似的内容，您可以向我们展示一段代码吗？以下内容来自文档：

The kind of input keyboard to request.
input_type is an OptionsProperty and defaults to ‘text’. Can be one of ‘text’, ‘number’, ‘url’, ‘mail’, ‘datetime’, ‘tel’ or ‘address’.

Answer 2

我使用以下示例完成了此操作：

https://github.com/kivy/kivy/tree/master/examples/keyboard

您的.kv文件应该是这样的：

TextInput:
    input_type: 'number'
    on_focus: root.text_focused()

您应该有一个方法来调用Python文件中带有数字布局的键盘

from kivy.uix.vkeyboard import VKeyboard 

def text_focused(self):
    VKeyboard.layout = 'numeric.json'
    player = VKeyboard()

从上面的链接获取布局，并将其与脚本保存在同一文件夹中

输出应该如下所示：

更新

在发布这篇文章之后，我找到了一个更好的解决方案here

但是，它缺少我添加的一些功能：

1. 添加删除按钮
2. 在泡泡键盘外轻触一下，泡泡键盘就会消失
3. 删除一些不必要的代码位
4. 允许使用光标位置删除

您需要从here下载arial-unicode-ms.ttf字体，并将字体与main.py脚本放在同一文件夹中，以便能够在键盘上显示删除符号

main.py

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.bubble import Bubble, BubbleButton
from kivy.lang import Builder
from kivy.core.window import Window


class CustomBubbleButton(BubbleButton):
    
    def add_text(self):
        app= App.get_running_app()
        index=app.root.text_input.cursor[0]-1
        if self.text!="⌫":
            app.root.text_input.text= app.root.text_input.text[:index+1]+self.text + app.root.text_input.text[index+1:]
            app.root.text_input.cursor=(index+2,0)
        else:
            app.root.text_input.text=app.root.text_input.text[:index] + app.root.text_input.text[index+1:]
            app.root.text_input.cursor=(index,0)
    pass


class NumericKeyboard(Bubble):
    
    def on_touch_up(self, touch):
        app= App.get_running_app()
        if  not self.collide_point(*touch.pos) and not app.root.text_input.collide_point(*touch.pos):
            app.root.remove_widget(app.root.bubb)
            app.root.text_input.focus=False
            delattr(app.root, 'bubb')     
                   
    def __init__(self, **kwargs):
        super(NumericKeyboard, self).__init__(**kwargs)
        self.create_bubble_button()

    def create_bubble_button(self):
        numeric_keypad = ['7', '8', '9', '4', '5', '6', '1', '2', '3', '.', '0', '⌫']
        for x in numeric_keypad:
            bubb_btn = CustomBubbleButton(text=str(x),font_name='arial-unicode-ms.ttf')
            self.layout.add_widget(bubb_btn)


class BubbleShowcase(FloatLayout):
    
    def show_bubble(self, *l):
        if not hasattr(self, 'bubb'):
            self.bubb = NumericKeyboard()
            self.bubb.arrow_pos = "bottom_mid"
            self.add_widget(self.bubb)

Builder.load_file("test.kv")

class TestBubbleApp(App):
    title = "Numeric Key Pad - Using Bubble"

    def build(self):
        return BubbleShowcase()

if __name__ == '__main__':
    Window.show_cursor = True
    TestBubbleApp().run()

测试.kv

<CustomBubbleButton>:
    on_release: root.add_text()
        
<NumericKeyboard>:
    layout: layout
    size_hint: (None, None)
    size: (160, 120)
    pos_hint: {'center_x': .5, 'y': .6}

    GridLayout:
        id: layout
        cols: 3

<BubbleShowcase>:
    text_input: text_input
    canvas:
        Color:
            rgba: 0, 1, 1, 1
        Rectangle:
            size: self.width, self.height
    TextInput:
        id: text_input
        keyboard_mode: 'managed'
        pos_hint: {'center_x': .5, 'y': .54}
        size_hint: (0.2, 0.06)
        cursor_blink: True
        font_size: 20
        multiline: False
        on_focus: root.show_bubble()

输出