我正在尝试使用Kivy和buildozer制作一个简单的android应用程序，在那里我对WhatsApp导出的聊天作出反应。目前，我仅尝试将来自应用程序的最后三则消息打印到屏幕上。问题是无法正确读取表情符号。例如，我聊天时最后三则消息是：

14-11-19 09:17-MyName：这是一个测试消息

14-11-19 09:17-MyName：带有表情符号?

14-11-19 09:17-我的名字：??

?表情符号应该是U + 0001F602

sup表情符号应为U + 0001F44C U + 0001F3FB

我在android上的输出：

如果我将聊天导出为.txt，然后在桌面上使用同一程序，则输出正确：

这是我的代码：

intent_filters.xml

<intent-filter>
    <action android:name="android.intent.action.SEND_MULTIPLE" />
    <category android:name="android.intent.category.DEFAULT" />
    <data android:mimeType="multipart/*" />
    <data android:mimeType="text/*" />
    <data android:mimeType="text/plain" />
</intent-filter>

Main.kv

<AuxScreen>:
    BoxLayout:
        Label:
            text: "Nothing here"

<MainScreen>
    loadinglabel : loadinglabel

    BoxLayout:
        Label:
            id : loadinglabel
            text: "loading..."
            text_size: self.width,None
            halign: 'center'

Main.py

from kivy.app import App
from kivy.lang import Builder
from kivy.properties import ObjectProperty
from kivy.utils import platform
from kivy.clock import Clock
from kivy.uix.screenmanager import Screenmanager,Screen

if platform == "android":
    from jnius import autoclass

APP_NAME = "Test"
Builder.load_file("main.kv")
testfile = "mytest.txt" # for debugging on desktop

class RootWidget(Screenmanager):
    def __init__(self,**kwargs):
        super().__init__(**kwargs)
        self.parent_app = App.get_running_app()
        if not (self.parent_app.intent or self.parent_app.chatdata):
            self.add_widget(AuxScreen(name = "aux"))
        else:
            self.add_widget(MainScreen(name="main"))

class AuxScreen(Screen):
    pass

class MainScreen(Screen):
    loadinglabel = ObjectProperty(None)

    def on_enter(self):
        Clock.schedule_once(lambda x: self.start_processing(),1)    

    def start_processing(self):
        if not self.manager.parent_app.chatdata:
            self.manager.parent_app.get_chatdata()
        self.loadinglabel.text = "".join(str(x.encode('unicode-escape')) + "\n" for x in self.manager.parent_app.chatdata[-4:])

class MyApp(App):
    title = APP_NAME

    def __init__(self,intent,**kwargs):
        super().__init__(**kwargs)
        self.intent = intent
        self.chatdata = None

        # For debugging on linux desktop
        if platform == "linux": 
            filename = testfile # Put here the name of your testfile
            f = open(filename,"r")
            self.chatdata = "".join(l for l in f.readlines()).split('\n')
            f.close() 

    def build(self):
        return RootWidget() 

    def get_chatdata(self):
        InputStreamReader = autoclass('java.io.InputStreamReader')
        BufferedReader = autoclass('java.io.BufferedReader')
        StringBuilder = autoclass('java.lang.StringBuilder')
        Pythonactivity = autoclass('org.renpy.android.Pythonactivity')

        activity = Pythonactivity.mactivity
        uri = self.intent.getclipData().getItemAt(0).geturi()
        inputstream = activity.getcontentResolver().openInputStream(uri)
        reader = InputStreamReader(inputstream,"UTF-8")
        recv_stream = BufferedReader(reader)
        data = StringBuilder()
        while True:
            line = recv_stream.readLine()
            if line:
                data.append(line)
                data.append('\n')
            else:
                nextchar = recv_stream.read()
                if nextchar == -1:
                    break
                data.append(chr(nextchar))
        self.chatdata = data.toString().split('\n')
        inputstream.close()

def get_android_intent():
    if platform == "android":
        Pythonactivity = autoclass('org.renpy.android.Pythonactivity')

        activity = Pythonactivity.mactivity
        intent = activity.getIntent()
        intent_action = intent.getaction()
        if intent and "SEND_MULTIPLE" in intent_action:
            return intent
    return False

if __name__ == "__main__":
    intent = get_android_intent()
    MyApp(intent).run()

buildozer.spec文件需要

android.manifest.intent_filters = intent_filters.xml

问题出在get_android_intent或get_chatdata函数中。我现在对Java几乎一无所知，因此欢迎对这些功能进行任何评论。

如果无法解决，我也很高兴对此行为做出解释。