Kivy App on Android keyboard/TextInput doesn't work properly: backspace has no effect and input doubles randomly

[olek5andr]

Python == 3.9.1 kivy == 2.1.0.dev0 KivyMD == 0.104.2.dev0

Here are the requirements from buildozer.spec: requirements = python3,kivy==master,https://github.com/kivymd/KivyMD/archive/master.zip,sdl2_ttf==2.0.15,requests,urllib3,chardet,idna,android,plyer,jnius,pillow

The keyboard doesn't work properly with TextInput fields. Backspace doesn't work at all, and the already inputed text just doubles at random, e.g. by typing 'qwerty123' you would get 'qwerty123qwerty123'. (And you can't delete it, because backspace doesn't work).

The bug is very similar to what is described here, although the proposed solution doesn't work in my case.

IMPORTANT:

In buildozer.spec I'm specifying 'p4a.branch == develop'. Because with the default 'p4a.branch == master' the app crashes on Android when you just focus on a TextInput. This bug does not appear when using kivy == 2.0.0. BUT using kivy == 2.0.0 is not an option because it lags extensively on Android.

Thanks in advance!

[RobertFlatt]

I have seen the kivy==master p4a.branch = master combination give the object has no attribute 'changeKeyboard' crash for a TextInput().

But I do not see the text echo/ no backspace issue with a small example.

    def build(self):
        g = BoxLayout()
        g.add_widget(Label(text = '0'))
        g.add_widget(TextInput())
        return g

Please post a VERY small runnable example that does not include KivyMD widgets.

[olek5andr]

I have seen the kivy==master p4a.branch = master combination give the object has no attribute 'changeKeyboard' crash for a TextInput().

But I do not see the text echo/ no backspace issue with a small example.

    def build(self):
        g = BoxLayout()
        g.add_widget(Label(text = '0'))
        g.add_widget(TextInput())
        return g

Please post a VERY small runnable example that does not include KivyMD widgets.

Hi, thanks for replying!

So, I basically stripped EVERYTHING away except for a Screen, a Boxlayout and a TextInput. Then I compiled it with buildozer and the issue of random echoing and backspace not responding still persists (Try typing a longer word, like 8 or 10 chars). Before echoing happens, backspace key works, but after - not anymore.

main.py:

           from kivy.app import App
           from kivy.core.window import Window

           Window.softinput_mode = 'below_target'

           class MainApp(App):

               def build(self):
                   return

            if __name__ == '__main__':
                MainApp().run()

main.kv:

BoxLayout:

    Screen:

        text: "Login"

        on_enter: password.text = ""

        BoxLayout:
            height: "600dp"

            BoxLayout:
                size_hint: 0.7, 0.1
                pos_hint: {'center_x': 0.5}

                TextInput:
                    id: password

            BoxLayout:
                size_hint: 1, 0.4

buildozer.spec:

[app]

# (str) Title of your application
title = Some Title

# (str) Package name
package.name = someapp

# (str) Package domain (needed for android/ios packaging)
package.domain = someapp.com

# (str) Source code where the main.py live
source.dir = .

# (list) Source files to include (let empty to include all the files)
source.include_exts = py,png,jpg,kv,atlas,po,mo,pot,json

# (list) List of inclusions using pattern matching
#source.include_patterns = assets/*,images/*.png

# (list) Source files to exclude (let empty to not exclude anything)
#source.exclude_exts = spec

# (list) List of directory to exclude (let empty to not exclude anything)
#source.exclude_dirs = tests, bin, venv

# (list) List of exclusions using pattern matching
#source.exclude_patterns = license,images/*/*.jpg

# (str) Application versioning (method 1)
version = 0.2

# (str) Application versioning (method 2)
# version.regex = __version__ = ['"](.*)['"]
# version.filename = %(source.dir)s/main.py

# (list) Application requirements
# comma separated e.g. requirements = sqlite3,kivy
requirements = python3,kivy==master,https://github.com/kivymd/KivyMD/archive/master.zip,sdl2_ttf==2.0.15,requests,urllib3,chardet,idna,android,plyer,jnius,pillow

# (str) Custom source folders for requirements
# Sets custom source for any requirements with recipes
# requirements.source.kivy = ../../kivy

# (str) Presplash of the application
#presplash.filename = %(source.dir)s/data/presplash.png
presplash.filename = %(source.dir)s/co_presplash2.png

# (str) Icon of the application
icon.filename = %(source.dir)s/co_logo2.png

# (str) Supported orientation (one of landscape, sensorLandscape, portrait or all)
orientation = portrait

# (list) List of service to declare
#services = NAME:ENTRYPOINT_TO_PY,NAME2:ENTRYPOINT2_TO_PY
services = Taskreminder:./task_remind_service.py

#
# OSX Specific
#

#
# author = © Copyright Info

# change the major version of python used by the app
osx.python_version = 3

# Kivy version to use
osx.kivy_version = 1.9.1

#
# Android specific
#

# (bool) Indicate if the application should be fullscreen or not
fullscreen = 0

# (string) Presplash background color (for android toolchain)
# Supported formats are: #RRGGBB #AARRGGBB or one of the following names:
# red, blue, green, black, white, gray, cyan, magenta, yellow, lightgray,
# darkgray, grey, lightgrey, darkgrey, aqua, fuchsia, lime, maroon, navy,
# olive, purple, silver, teal.
#android.presplash_color = #FFFFFF

# (string) Presplash animation using Lottie format.
# see https://lottiefiles.com/ for examples and https://airbnb.design/lottie/
# for general documentation.
# Lottie files can be created using various tools, like Adobe After Effect or Synfig.
#android.presplash_lottie = "path/to/lottie/file.json"

# (list) Permissions
android.permissions = INTERNET,CALL_PHONE

# (list) features (adds uses-feature -tags to manifest)
#android.features = android.hardware.usb.host

# (int) Target Android API, should be as high as possible.
#android.api = 27
android.api = 29

# (int) Minimum API your APK will support.
#android.minapi = 21

# (int) Android SDK version to use
#android.sdk = 20

# (str) Android NDK version to use
#android.ndk = 19b

# (int) Android NDK API to use. This is the minimum API your app will support, it should usually match android.minapi.
#android.ndk_api = 21

# (bool) Use --private data storage (True) or --dir public storage (False)
#android.private_storage = True

# (str) Android NDK directory (if empty, it will be automatically downloaded.)
#android.ndk_path =

# (str) Android SDK directory (if empty, it will be automatically downloaded.)
#android.sdk_path =

# (str) ANT directory (if empty, it will be automatically downloaded.)
#android.ant_path =

# (bool) If True, then skip trying to update the Android sdk
# This can be useful to avoid excess Internet downloads or save time
# when an update is due and you just want to test/build your package
# android.skip_update = False

# (bool) If True, then automatically accept SDK license
# agreements. This is intended for automation only. If set to False,
# the default, you will be shown the license when first running
# buildozer.
android.accept_sdk_license = True

# (str) Android entry point, default is ok for Kivy-based app
#android.entrypoint = org.renpy.android.PythonActivity

# (str) Android app theme, default is ok for Kivy-based app
# android.apptheme = "@android:style/Theme.NoTitleBar"

# (list) Pattern to whitelist for the whole project
#android.whitelist =

# (str) Path to a custom whitelist file
#android.whitelist_src =

# (str) Path to a custom blacklist file
#android.blacklist_src =

# (list) List of Java .jar files to add to the libs so that pyjnius can access
# their classes. Don't add jars that you do not need, since extra jars can slow
# down the build process. Allows wildcards matching, for example:
# OUYA-ODK/libs/*.jar
#android.add_jars = foo.jar,bar.jar,path/to/more/*.jar

# (list) List of Java files to add to the android project (can be java or a
# directory containing the files)
#android.add_src =

# (list) Android AAR archives to add
#android.add_aars =

# (list) Gradle dependencies to add
#android.gradle_dependencies =

# (list) add java compile options
# this can for example be necessary when importing certain java libraries using the 'android.gradle_dependencies' option
# see https://developer.android.com/studio/write/java8-support for further information
# android.add_compile_options = "sourceCompatibility = 1.8", "targetCompatibility = 1.8"

# (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies}
# please enclose in double quotes 
# e.g. android.gradle_repositories = "maven { url 'https://kotlin.bintray.com/ktor' }"
#android.add_gradle_repositories =

# (list) packaging options to add 
# see https://google.github.io/android-gradle-dsl/current/com.android.build.gradle.internal.dsl.PackagingOptions.html
# can be necessary to solve conflicts in gradle_dependencies
# please enclose in double quotes 
# e.g. android.add_packaging_options = "exclude 'META-INF/common.kotlin_module'", "exclude 'META-INF/*.kotlin_module'"
#android.add_packaging_options =

# (list) Java classes to add as activities to the manifest.
#android.add_activities = com.example.ExampleActivity

# (str) OUYA Console category. Should be one of GAME or APP
# If you leave this blank, OUYA support will not be enabled
#android.ouya.category = GAME

# (str) Filename of OUYA Console icon. It must be a 732x412 png image.
#android.ouya.icon.filename = %(source.dir)s/data/ouya_icon.png

# (str) XML file to include as an intent filters in <activity> tag
#android.manifest.intent_filters =

# (str) launchMode to set for the main activity
#android.manifest.launch_mode = standard

# (list) Android additional libraries to copy into libs/armeabi
#android.add_libs_armeabi = libs/android/*.so
#android.add_libs_armeabi_v7a = libs/android-v7/*.so
#android.add_libs_arm64_v8a = libs/android-v8/*.so
#android.add_libs_x86 = libs/android-x86/*.so
#android.add_libs_mips = libs/android-mips/*.so

# (bool) Indicate whether the screen should stay on
# Don't forget to add the WAKE_LOCK permission if you set this to True
#android.wakelock = False

# (list) Android application meta-data to set (key=value format)
#android.meta_data =

# (list) Android library project to add (will be added in the
# project.properties automatically.)
#android.library_references =

# (list) Android shared libraries which will be added to AndroidManifest.xml using <uses-library> tag
#android.uses_library =

# (str) Android logcat filters to use
android.logcat_filters = *:S python:D

# (str) Android additional adb arguments
#android.adb_args = -H host.docker.internal

# (bool) Copy library instead of making a libpymodules.so
#android.copy_libs = 1

# (str) The Android arch to build for, choices: armeabi-v7a, arm64-v8a, x86, x86_64
android.arch = arm64-v8a

# (int) overrides automatic versionCode computation (used in build.gradle)
# this is not the same as app version and should only be edited if you know what you're doing
# android.numeric_version = 1

# (bool) enables Android auto backup feature (Android API >=23)
android.allow_backup = True

# (str) XML file for custom backup rules (see official auto backup documentation)
# android.backup_rules =

# (str) If you need to insert variables into your AndroidManifest.xml file,
# you can do so with the manifestPlaceholders property.
# This property takes a map of key-value pairs. (via a string)
# Usage example : android.manifest_placeholders = [myCustomUrl:\"org.kivy.customurl\"]
# android.manifest_placeholders = [:]

#
# Python for android (p4a) specific
#

# (str) python-for-android fork to use, defaults to upstream (kivy)
#p4a.fork = kivy

# (str) python-for-android branch to use, defaults to master
# p4a.branch = master
p4a.branch = develop

# (str) python-for-android git clone directory (if empty, it will be automatically cloned from github)
#p4a.source_dir =

# (str) The directory in which python-for-android should look for your own build recipes (if any)
#p4a.local_recipes =

# (str) Filename to the hook for p4a
#p4a.hook =

# (str) Bootstrap to use for android builds
p4a.bootstrap = sdl2

# (int) port number to specify an explicit --port= p4a argument (eg for bootstrap flask)
#p4a.port =

# Control passing the --use-setup-py vs --ignore-setup-py to p4a
# "in the future" --use-setup-py is going to be the default behaviour in p4a, right now it is not
# Setting this to false will pass --ignore-setup-py, true will pass --use-setup-py
# NOTE: this is general setuptools integration, having pyproject.toml is enough, no need to generate
# setup.py if you're using Poetry, but you need to add "toml" to source.include_exts.
#p4a.setup_py = false

#
# iOS specific
#

# (str) Path to a custom kivy-ios folder
#ios.kivy_ios_dir = ../kivy-ios
# Alternately, specify the URL and branch of a git checkout:
ios.kivy_ios_url = https://github.com/kivy/kivy-ios
ios.kivy_ios_branch = master

# Another platform dependency: ios-deploy
# Uncomment to use a custom checkout
#ios.ios_deploy_dir = ../ios_deploy
# Or specify URL and branch
ios.ios_deploy_url = https://github.com/phonegap/ios-deploy
ios.ios_deploy_branch = 1.10.0

# (bool) Whether or not to sign the code
ios.codesign.allowed = false

# (str) Name of the certificate to use for signing the debug version
# Get a list of available identities: buildozer ios list_identities
#ios.codesign.debug = "iPhone Developer: <lastname> <firstname> (<hexstring>)"

# (str) Name of the certificate to use for signing the release version
#ios.codesign.release = %(ios.codesign.debug)s

[buildozer]

# (int) Log level (0 = error only, 1 = info, 2 = debug (with command output))
log_level = 2

# (int) Display warning if buildozer is run as root (0 = False, 1 = True)
warn_on_root = 1

# (str) Path to build artifact storage, absolute or relative to spec file
# build_dir = ./.buildozer

# (str) Path to build output (i.e. .apk, .ipa) storage
# bin_dir = ./bin

#    -----------------------------------------------------------------------------
#    List as sections
#
#    You can define all the "list" as [section:key].
#    Each line will be considered as a option to the list.
#    Let's take [app] / source.exclude_patterns.
#    Instead of doing:
#
#[app]
#source.exclude_patterns = license,data/audio/*.wav,data/images/original/*
#
#    This can be translated into:
#
#[app:source.exclude_patterns]
#license
#data/audio/*.wav
#data/images/original/*
#

#    -----------------------------------------------------------------------------
#    Profiles
#
#    You can extend section / key with a profile
#    For example, you want to deploy a demo version of your application without
#    HD content. You could first change the title to add "(demo)" in the name
#    and extend the excluded directories to remove the HD content.
#
#[app@demo]
#title = My Application (demo)
#
#[app:source.exclude_patterns@demo]
#images/hd/*
#
#    Then, invoke the command line with the "demo" profile:
#
#buildozer --profile demo android debug

[RobertFlatt]

I tried the example code above with the default buildozer.spec [ modified with kivy==master p4a.branch = develop ] (the posted .spec is unusable, small runnable means .spec too ).

Could not replicate, I tried typing rows of keys and the back button. Not going to spend any more time on this.

[olek5andr]

I tried the example code above with the default buildozer.spec [ modified with kivy==master p4a.branch = develop ] (the posted .spec is unusable, small runnable means .spec too ).

Could not replicate, I tried typing rows of keys and the back button. Not going to spend any more time on this.

Hi, sorry, my bad with the unusable .spec. The above example with the default buildozer.spec [ modified with kivy==master p4a.branch = develop ] on an Android 9 device does produce the bug.

See the video below

https://user-images.githubusercontent.com/22771286/120919230-249a1e80-c6c1-11eb-99bb-ff5849acf8e9.mp4

[ljnath]

Just to add to this, the [ENTER] key is not working either.

[tshirtman]

yes, there are multiple issues with keyboard input because of suggestions being enabled in master, i started a PR, but there are still some issues with it and i didn’t find a reliable solution enough to confidently go forward yet, https://github.com/kivy/kivy/pull/7485 i think i have some more local changes to push (will look later), but if someone has time to experiment with the possible solutions, feel free to.

[Arctic4161]

Any update on this? I am having the same issue of double input of text when using space bar and backspace not working,

[Darkwolf7524]

Any update on this? I am having the same issue of double input of text when using space bar and backspace not working,

What version of Kivy are you using?

[Arctic4161]

I had it set to main and when I used develop it worked. Just forgot to update this thread

On Tue, Mar 15, 2022, 9:14 PM Daniel Garcia @.***> wrote:

Any update on this? I am having the same issue of double input of text when using space bar and backspace not working,

What version of Kivy are you using?

— Reply to this email directly, view it on GitHub https://github.com/kivy/python-for-android/issues/2461#issuecomment-1068660596, or unsubscribe https://github.com/notifications/unsubscribe-auth/APPHHV3BNT52MZW2BTSTL2LVAE7ZNANCNFSM453HIXGA . Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub.

You are receiving this because you commented.Message ID: @.***>

[Darkwolf7524]

I had it set to main and when I used develop it worked. Just forgot to update this thread … On Tue, Mar 15, 2022, 9:14 PM Daniel Garcia @.> wrote: Any update on this? I am having the same issue of double input of text when using space bar and backspace not working, What version of Kivy are you using? — Reply to this email directly, view it on GitHub <#2461 (comment)>, or unsubscribe https://github.com/notifications/unsubscribe-auth/APPHHV3BNT52MZW2BTSTL2LVAE7ZNANCNFSM453HIXGA . Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub. You are receiving this because you commented.Message ID: @.>

Right, that's great!

[ghost]

Is there any solution to this? I dont understand what is meant by setting it to main

[Arctic4161]

In the bulldozer.spec file you need to set p4a.branch = develop instead of p4a.branch = main.

[ghost]

I used a workaround with vkeyboard, but good to know, textinput works.

[ghost]

I tried it today, changing p4a.branch = develop in the buildozer. I get the following error:

Traceback (most recent call last): File "/usr/local/bin/buildozer", line 8, in sys.exit(main()) File "/usr/local/lib/python3.7/dist-packages/buildozer/scripts/client.py", line 13, in main Buildozer().run_command(sys.argv[1:]) File "/usr/local/lib/python3.7/dist-packages/buildozer/init.py", line 1020, in run_command self.target.run_commands(args) File "/usr/local/lib/python3.7/dist-packages/buildozer/target.py", line 93, in run_commands func(args) File "/usr/local/lib/python3.7/dist-packages/buildozer/target.py", line 103, in cmd_debug self.buildozer.prepare_for_build() File "/usr/local/lib/python3.7/dist-packages/buildozer/init.py", line 170, in prepare_for_build self.target.install_platform() File "/usr/local/lib/python3.7/dist-packages/buildozer/targets/android.py", line 702, in install_platform self._install_android_ndk() File "/usr/local/lib/python3.7/dist-packages/buildozer/targets/android.py", line 494, in _install_android_ndk cwd=self.buildozer.global_platform_dir) File "/usr/local/lib/python3.7/dist-packages/buildozer/init.py", line 654, in download urlretrieve(url, filename, report_hook) File "/usr/lib/python3.7/urllib/request.py", line 1850, in retrieve block = fp.read(bs) File "/usr/lib/python3.7/tempfile.py", line 620, in func_wrapper return func(*args, **kwargs) ValueError: read of closed file

[HyTurtle]

pip install -U https://github.com/kivy/buildozer/archive/master.zip

[ghost]

Thanks. It worked, but the problems with textinput are the same as always and as described before. Did I forget something?

[Aravind0007]

Hi everyone, I have some blockers similar to this issue in backspace functionality and keyboard suggestions. We already had discussion in google groups kivy user support. Please find the discussion link here : https://groups.google.com/g/kivy-users/c/yQIuLZPf-jg/m/Be6maQTOCwAJ?utm_medium=email&utm_source=footer . If it's a user code issue, Please guide me how to resolve this. Let me know if it's a kivy platform code issue and if you need anything else from my side :)