I recently had the opportunity to try out Samsung’s Dex mode.，Encountering a headache。I usually use Shuangpin when typing Chinese.，Samsung keyboard does not support double pin.。Only third-party keyboard Google keyboard can be installed。But on Dex，Although the Google keyboard has been automatically added in the settings，But in actual use, only Samsung’s own keyboard can be used。
The solution is also very simple，Just delete the Samsung keyboard。I haven't tried this with multiple third-party keyboards installed，In my own case，After deleting Samsung keyboard，Since I only have google keyboard，Google Keyboard will automatically become the default keyboard。
1、Turn off automatic blocking， Settings － Security and privacy － Auto Blocker － off
This is a security feature recently added by Samsung，Turn it off temporarily to enable usb debug mode。You can come back later and turn this security option back on。
2、Turn on device Debug mode
Not repeat them here，Click the mobile phone version number several times and follow the prompts.。After turning it on, turn on usb debug in developer options.
3、Prepare developer environment
you need a computer，Either Windows or macOS will work，But you need to install the adb package，This way you can connect to your mobile phone to operate
Use the command adb devices Make sure you can see your device and have authorization，And then use the adb shell Connect mobile phone。
4、Remove Samsung Keyboard
Package id for Samsung keyboard is with.samsung.android.honeyboard
After entering the mobile phone shell，You can use the command pm list packages | grep board To confirm that there is an app with the same package name as above
Use the command pm uninstall -k --user 0 with.samsung.android.honeyboard to uninstall the app for the current user，You'll see Success words。
5、Restore Samsung Keyboard
Ok，Deleting the Samsung keyboard comes at a cost：System settings in progress，The Accessibility option is completely unavailable，If you don't use this function，You can ignore it or use goodlock to hide this button.。The other thing is if your lock screen password is a complex password that needs to be entered using the keyboard.，Then there is no system built-in keyboard，You may not be able to enter after restarting，Because third-party keyboards need to be unlocked before they can start。
It’s also easy to restore a Samsung keyboard，Just search and download from Samsung Mall directly.。Or repeat the above operation，Use the command in step 4 pm install-existing with.samsung.android.honeyboard put it back。-- Because when we delete, we actually delete it for the current user.，This app is a system application，It is impossible to completely uninstall，So its bag is still there，Just install it。
References
https://www.xda-developers.com/uninstall-carrier-oem-bloatware-without-root-access/
Original article written by LogStudio：R0uter's Blog » Samsung DEX uses third-party input methods
Reproduced Please keep the source and description link：https://www.logcg.com/archives/3840.html
Hong Kong version of Samsung input method supports Shuangpin，Other foreign versions are not supported，But the package is the same，It would be great if I could hack it
Galaxy Tab S4 uses the above method to freeze the Samsung keyboard and then enters the dex soft restart infinite loop.，Fortunately, adb was still available for a period of time.，Please try with caution，Let’s use termux to call the shiziku api command to change the input method.，A little troublesome but it works，WeChat input method is pretty good recently，Promote it to my friends
You are so tossing，I also use double spelling，FlyPY