Bluetooth | android 蓝牙开发 android 打开、搜索、配对、连接、通信发送文字、传输默认文件

by huanglinqing123 Java Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | Bluetooth Summary

Bluetooth is a Java library. Bluetooth has no bugs, it has no vulnerabilities, it has build file available and it has low support. You can download it from GitHub.

Android 蓝牙开发 Android 打开、搜索、配对、连接、通信发送文字、传输默认文件.

Support

Quality

Security

License

Reuse

Support

Bluetooth has a low active ecosystem.

It has 32 star(s) with 16 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. On average issues are closed in 331 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Bluetooth is current.

Quality

Bluetooth has 0 bugs and 0 code smells.

Security

Bluetooth has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

Bluetooth code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

Bluetooth does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

Bluetooth releases are not available. You will need to build from source code and install.

Build file is available. You can build the component from source.

Bluetooth saves you 679 person hours of effort in developing the same functionality from scratch.

It has 1573 lines of code, 134 functions and 25 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed Bluetooth and discovered the below as its top functions. This is intended to give you an instant insight into Bluetooth implemented functionality, and help decide if they suit your requirements.

Initializes the state of the bridge
Initialize the titlebar
Connect to bluetooth device
Creates the activity
Region List View
Start scan
Start bluetooth server
Initialize thread pool executor
Click BLT
Required by Android adapter
Check if BluetoothAdapter is enabled
Initialize view
Initialize the view
Sets the status bar to show when the app is created
Receive a message from bluetooth socket
Handle view clicked
Layout layout
Removes an action from the action bar
Adds a list of actions
Callback method for receiving Bluetooth devices
Bind bluetooth device
Get bond list
Set custom title view
Register blt event receiver
Calculate the layout
Receive message event

Get all kandi verified functions for this library.

Bluetooth Key Features

No Key Features are available at this moment for Bluetooth.

Bluetooth Examples and Code Snippets

No Code Snippets are available at this moment for Bluetooth.

Community Discussions

Trending Discussions on Bluetooth

Send data using over bluetooth using different protocols

RXKOTLIN/RXJAVA: Communication between the socket using Observables

Difficult To Connect Thermal Printer via Web Bluetooth

Sending Beacon Signals from a Web Browser

Angular install doesn't recognize node

How do I check is my app ios has Bluetooth permission in Xamarin.ios?

Perform a bluetooth scan with BluetoothAdapter in Xamarin.android

FirebaseFirestore.getInstance() and app has stoped

Only run code when connected to wifi Batch

Filtering by categories react and bootstrap

QUESTION

Send data using over bluetooth using different protocols

Asked 2021-Jun-14 at 18:48

I have an app that communicates with a bluetooth device, and I'm trying to replace that app with some code.

I tried using C# InTheHand nuget, Microsoft's Bluetooth LE Explorer, python's sockets and others to send data and see what happens.

But there's something I still don't understand - in each way using different libraries I saw in wireshark a different protocol: ATT, RFCOMM, L2CAP...

When I sniffed my bluetooth traffic from my phone using the app mentioned before, I saw mostly HCI_CMD protocol traffic.

How can I choose the protocol I want to send? Is there a simple package for that? something to read?

Do I need to build the packet myself? including headers and such?

Thank you!

Update: Using Microsoft's Bluetooth LE Explorer I was able to send a packet that lit up my lamp, starting with 02010e10000c00040012(data)
Using bleak I was able to send a packet starting with 02010e10000c00040052(data)
the difference makes the lamp not ligh up and I'm not sure if I can change it via bleak as it's not part of the data I send

...

ANSWER

Answered 2021-Jun-14 at 18:48

I think what you are showing is that bleak does a write without response while MS BLE Explorer does a write_with_response.

Looking at the Bleak documentation for write_gatt_char that seems to be consistent as response is False by default

write_gatt_char Parameters:

char_specifier (BleakGATTCharacteristic, int, str or UUID). The characteristic to write to, specified by either integer handle, UUID or directly by the BleakGATTCharacteristic object representing it.

data (bytes or bytearray) – The data to send.

response (bool) – If write-with-response operation should be done. Defaults to False.

I would expect the following to have the desired effect:

Source https://stackoverflow.com/questions/67961476

QUESTION

RXKOTLIN/RXJAVA: Communication between the socket using Observables

Asked 2021-Jun-14 at 18:21

I am a newbie to RXKotlin/RXJava. I am developing the background service in Android.

In my service, I have

Bluetooth socket
TCP Socket

Whenever the data is available on the Bluetooth socket, read and write to the TCP socket. And whenever data is received in the TCP socket, write to the Bluetooth socket.

Can someone help me:

how to achieve this using Observables?
how to exchange the socket id information?
how to exchange the data? Thanks

...

ANSWER

Answered 2021-Jun-14 at 08:16

Please try using RxSubjects (https://blog.mindorks.com/understanding-rxjava-subject-publish-replay-behavior-and-async-subject-224d663d452f)

Let me take PublishSubject as an example here.

Source https://stackoverflow.com/questions/67960660

QUESTION

Difficult To Connect Thermal Printer via Web Bluetooth

Asked 2021-Jun-14 at 10:38

Right now I am developing web which has ability to connect thermal printer. I am using angular framework, and I successfully connect the thermal printer with USB using library ng-thermal-printer. But I want to my web also being able to connect thermal printer via web bluetooth which is BLE (Bluetooth Low Energy). As far as I know, BLE has specification in term of GATT and has services and characteristics in it.

The progress I did so far, I can connect and send a value to the thermal printer device in a Service and a Characteristic, let's say Service with UUID AS and Characteristics with UUID AC, using my android phone with the help of application named nRF Connect. Targeting Service AS and send hexadecimal value at charateristic AC make me successfully print something on the thermal paper.

But there is a problem. After knowing the right service and characteristic. I implemented it in my project. But, my chrome browser console showed error:

Origin is not allowed to access any service... and it told me to add optionalServices when requestiDevice()
After I added Service AS in property optionalServices, the console showed error DOMException: Connection failed for unknown reason. The errors showed both in chrome PC and chrome android.

NB:

I have enabled Experimental Web Platform features on chrome
I have enabled Use the new permissions backend for Web Bluetooth on chrome
I have enabled Allow invalid certificates for resources loaded from localhost. on chrome
I have enabled Enable new USB backend on chrome
I have used https.

Additional question. is bluetooth connection that application nRF Connect used different from BLE? if so, why it displays services and characteristics?

...

ANSWER

Answered 2021-Jun-14 at 07:34

I'd recommend you try sending those hex values directly from the about:bluetooth-internals page and see if you can reproduce the connection error from there as well. See https://web.dev/bluetooth/#tips

If so, check out https://www.chromium.org/developers/how-tos/file-web-bluetooth-bugs to learn how to properly file a chromium bug so that the team can fix the underlying issue.

If not, could you share your JS code so that we can help you diagnose what could be going wrong in your code?

Source https://stackoverflow.com/questions/67947790

QUESTION

Sending Beacon Signals from a Web Browser

Asked 2021-Jun-14 at 06:31

I'd like to send a beacon signal from my mobile web browser. Is there a way to broadcast BLE in a browser? I checked the non-standard Bluetooth API, but there was no such function.

Thank you for reading it.

...

ANSWER

Answered 2021-Jun-14 at 06:31

Unfortunately there doesn't seem to be support for this yet. There's an open request for this feature as can be seen here:-

More information about web bluetooth support is found here:-

Source https://stackoverflow.com/questions/67964730

QUESTION

Angular install doesn't recognize node

Asked 2021-Jun-12 at 16:10

I have been trying to install Angular but everytime this part:

@angular/cli@12.0.3 postinstall C:\Users\Marco\AppData\Roaming\npm\node_modules@angular\cli

node ./bin/postinstall/script.js

Seems to throw an error. I'm not sure if I need this to work or not so I'll leave the last couple lines of the log here.

...

ANSWER

Answered 2021-Jun-12 at 16:10

I fixed it by going to the actual file location of script.js and running the node command with that path. Like this:

node AppData/Roaming/npm/node_modules/@angular/cli/bin/postinstall/script.js

Actually that only helped a little bit. The problem was I was trying to install Angular using ConEmu GitBash and I should've been using cmd.

Source https://stackoverflow.com/questions/67913160

QUESTION

How do I check is my app ios has Bluetooth permission in Xamarin.ios?

Asked 2021-Jun-12 at 04:29

I need to check if my Xamarin.Forms app has bluetooth permission and if not I would like to request it. I have been able to implement this as a Dependency service for Android but I do not know how to do it for iOS. I have seen some articles mentioning some differences between how this works on ios 13 vs earlier versions, but they have not been very clear.

I tried checking and testing on an iPhone 6s running ios 12.2 with this code:

...

ANSWER

Answered 2021-Jun-12 at 04:29

Apple introduced bluetooth permission from iOS 13.

Hence, you do not required to request or check Bluetooth permission for iOS 12 and below.

To enable Bluetooth, two keys have to be added in the plist file. Privacy — Bluetooth Peripheral Usage Description and Privacy — Bluetooth Always Usage Description. Give the description of why you want to use Bluetooth in your app.

Xamarin.Forms shared PCL code Dependency service interface

Source https://stackoverflow.com/questions/67611149

QUESTION

Perform a bluetooth scan with BluetoothAdapter in Xamarin.android

Asked 2021-Jun-10 at 06:47

I am implementing an APP with Xamarin.

I want to perform a Bluetooth scan. And get the device found.

Here is my code.

How could I implement this to start a scan and collect the result once"Button_Scan()" is triggered?

Thank you.

...

ANSWER

Answered 2021-Jun-10 at 06:47

You have defined a BluetoothReceiver to receive the result ,you just add the device information into a deviceList.

Source https://stackoverflow.com/questions/67896631

QUESTION

FirebaseFirestore.getInstance() and app has stoped

Asked 2021-Jun-09 at 03:39

I run my Android app (based on Java), and it works. Next, I add to my app code:

FirebaseFirestore fdb = FirebaseFirestore.getInstance();

This code I got from the official Android site https://firebase.google.com/docs/firestore/quickstart

App runs, but next the running device shows the message "app has stopped".

I use a device simulator available in Android Studio.

It is my first Android app, and I can't understand what is going.

----Trace------ 2021-06-08 20:57:30.186 7155-7155/? D/AndroidRuntime: >>>>>> START com.android.internal.os.RuntimeInit uid 2000 <<<<<< 2021-06-08 20:57:30.188 7155-7155/? D/AndroidRuntime: CheckJNI is ON 2021-06-08 20:57:30.210 7155-7155/? W/art: Unexpected CPU variant for X86 using defaults: x86 2021-06-08 20:57:30.214 7155-7155/? D/ICU: No timezone override file found: /data/misc/zoneinfo/current/icu/icu_tzdata.dat 2021-06-08 20:57:30.229 7155-7155/? E/memtrack: Couldn't load memtrack module (No such file or directory) 2021-06-08 20:57:30.229 7155-7155/? E/android.os.Debug: failed to load memtrack module: -2 2021-06-08 20:57:30.230 7155-7155/? I/Radio-JNI: register_android_hardware_Radio DONE 2021-06-08 20:57:30.239 7155-7155/? D/AndroidRuntime: Calling main entry com.android.commands.am.Am

...

ANSWER

Answered 2021-Jun-09 at 03:39

At the end of your log, just before the initial crash. there is a warning:

Default FirebaseApp failed to initialize because no default options were found. This usually means that com.google.gms:google-services was not applied to your gradle project.

simply adding com.google.gms:google-services should fix any issues you have, if you have issues, ensure your Gradle cache is cleared or run without the build cache --no-build-cache

Source https://stackoverflow.com/questions/67889792

QUESTION

Only run code when connected to wifi Batch

Asked 2021-Jun-07 at 05:58

I need to run a batch file only if it's connected to Wifi and specifically not Bluetooth LAN

I have this code but it returns this and still runs the code while an internet connection isn't present

...

ANSWER

Answered 2021-Jun-07 at 05:58

You don't need a for loop:

Source https://stackoverflow.com/questions/66717986

QUESTION

Filtering by categories react and bootstrap

Asked 2021-Jun-06 at 19:28

i am building an ecommerce website and i'm trying to add category button on the home page so that when you click a specific category, only those items will show. I am using redux to bring all the items to the home screen.

...

ANSWER

Answered 2021-Jun-06 at 19:28

You can create a state variable that will have the selected category name. Before you render products filter the products which have the category as selected category.

Source https://stackoverflow.com/questions/67862657

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install Bluetooth

You can download it from GitHub.
You can use Bluetooth like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the Bluetooth component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

Find more information at: