Has anybody meet such a problem? when using the bluetooth chat sample , it
says could not connected! i have tested the sample with two android2.1 mobile phone!
anyone who meet such a problem can share the solution?
the code just go to the socket.accept then it block,could not go !
Do U add permissions to AndroidManifest.xml ?
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH" />
Related
I'm working on android app which do some pings on LAN, using C# System.Net.NetworkInformation.Ping class. What kind of android manifest permission do I need? For now I have only android.permission.INTERNET, but it seems not enought.
Many thanks for any help.
add these two permissions :
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
I am writing an app that needs to send SMS, if device support it, appart from Internet access and bluetooth communication. In the manifest I have these permissions:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.SEND_SMS" />
If I send the app to a 4.4.2 device using USB, everything works well. If I deploy that app on the google play, the same device can not see that app (meaning that it is not compliant with the device).
If I remove this line:
and deploy app on google play again, I can install it on the 4.4.2 device.
My question is:
Why does
<uses-permission android:name="android.permission.SEND_SMS" />
permission works when app is deployd by USB but prevents app from being installed if using google play?
Thanks a lot
Imo
android.telephony.gsm.SmsManager smsManager = android.telephony.gsm.SmsManager.getDefault();
smsManager.sendTextMessage(91xxxxxxxxxx, null, "message", null, null);
Use this code to send text messages which gives you various choices over send the message through all possible messengers.
This code works on every platform.
I'm building a Cordova app that needs to access WiFi on Android and disable the currently connected network in order to prevent automatic disconnection from the network i'm having it connect to (since there is no internet).
The problem is that when testing on Android Oreo 8.0+ I am getting this error in adb logcat and I can't figure out what I need to do to fix this:
E/WifiConfigManager: UID 10315 does not have permission to update configuration "Test SSID"WPA_PSK
E/WifiStateMachine: Failed to disable network
These are the perms listed in manifest:
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.OVERRIDE_WIFI_CONFIG" />
<uses-permission android:name="android.permission.INTERNET" />
The OVERRIDE_WIFI_CONFIG perm I found on this post, but that doesn't seem to help in my specific situation: Changing Android hotspot settings
I found this specific error located in this file:
https://android.googlesource.com/platform/frameworks/opt/net/wifi/+/master/service/java/com/android/server/wifi/WifiConfigManager.java#984
Which calls canModifyNetwork which I found here:
https://android.googlesource.com/platform/frameworks/opt/net/wifi/+/master/service/java/com/android/server/wifi/WifiConfigManager.java#651
Can anybody more experienced with Android help me to resolve this issue, and what needs to be done in order to allow my app to disable networks?
Does this mean that apps are not allowed to disable a network if it wasn't created by the app?? Please help I don't know where to go from here!
I did find this post as well, which references 6.0, but is this true that we're basically completely locked out of disabling networks we didn't create? Android 6.0 Cannot add WifiConfiguration if there is already another WifiConfiguration for that SSID
I am not able to answer your question per se, but I can answer this
Does this mean that apps are not allowed to disable a network if it
wasn't created by the app?
That's correct, as according the documentation of the method disableNetwork:
Disable a configured network. The specified network will not be a
candidate for associating. This may result in the asynchronous
delivery of state change events. Applications are not allowed to
disable networks created by other applications.
So if the user has already connected to this network using the Android system, in Oreo you won't be able to disable the network.
Though the method disableNetwork returns true or false in the case of success or failure
I am trying to get mobile blue-tooth mac id programmatically.i saw some link and i got this coce.
String macAddress = android.provider.Settings.Secure.getString(context.getContentResolver(), "bluetooth_address");
upto nougat this code is working fine.But i am getting null in OREO(8.0.0) and i gave permission in manifest file.
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
So is there a way to get the bluetooth mac address in OREO?
The blue-tooth mac address is only available to system apps in Android Oreo. Please check this answer for details. Moreover you can also read this article for more information.
This question already has an answer here:
How to programmatically turn off WiFi on Android device? [duplicate]
(1 answer)
Closed 9 years ago.
From browsing StackOverflow I understand how an app gets root privileges (the "su" command) but does the app need root access to do the following commands?
Turn Bluetooth On/Off
Turn WiFi On/Off
Turn Mobile Data On/Off
The reason I ask is that for a unit of my studies, I am wanting to create a basic AI using either text input or the google api for speech recognition. I would like it to be able to control phone functions to make a true "assistant in your pocket". Code samples will be useful but a simple text explanation will be more than sufficient.
I apologize if this has been asked before but searching didn't find my question.
Many Thanks in Advance,
James
You don't need root for those operations, you just need to have the permissions for those actions in the application manifest.
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />