Android Question problem http on android 9

[aldomoscarda]

I have b4a, version 8.5
This code works perfectly until Android 8 or minor. But in 9 it does not work (not error message. It just comes out of the application.)

...
trabajo3.PostString("http://xxx.xxx.xxx.xxx:4580/listado_medico.php", Cadena)

any help, thank

 

[moster67]

Try to implement what is mentioned in this post:
https://www.b4x.com/android/forum/threads/android-jar-targetsdkversion-minsdkversion.87610/

- 28 - Non-ssl (non-https) communication is not permitted by default. It can be enabled in B4A v9+ by adding this line to the manifest editor:

CreateResourceFromFile(Macro, Core.NetworkClearText)

Edit: I noted that you are using B4A v.8.5. Try to add this to the manifest:

SetApplicationAttribute(android:usesCleartextTraffic, "true")

 

[aldomoscarda]

Thanks for your message.

Add this to the manifest and it does NOT work.

'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: http://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="9" android:targetSdkVersion="28"/>
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
SetApplicationAttribute(android:usesCleartextTraffic, "true")
'End of default text.

 

[Erel]

There must be an error message in the logs. Check the unfiltered logs. If you don't see it then switch to USB debug mode.

 

[aldomoscarda]

Thanks Erel! I will buy version 9.01 of B4A and see if the error continues and will notify you.

 

[KMatle]

Thanks Erel! I will buy version 9.01 of B4A and see if the error continues and will notify you.

You did not get the point. Http is insecure, Https is secure (encrypted). Android 9 does not allow insecure connections unless you change the setting. It's not an error.

 

[aldomoscarda]

Thank @KMatle

You did not get the point. Http is insecure, Https is secure (encrypted). Android 9 does not allow insecure connections unless you change the setting. It's not an error.

Now I have the B4A, v9.3. I manifested this but it DOES NOT WORK.

MANIFEST
'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: http://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="9" android:targetSdkVersion="28"/>
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
SetApplicationAttribute(android:usesCleartextTraffic, "true")
CreateResourceFromFile(Macro, Core.NetworkClearText)
AddPermission(android.permission.WRITE_EXTERNAL_STORAGE)
AddPermission(android.permission.READ_EXTERNAL_STORAGE)
AddPermission(android.permission.ACCESS_CHECKIN_PROPERTIES)
AddPermission(android.permission.ACCESS_COARSE_LOCATION)
AddPermission(android.permission.ACCESS_FINE_LOCATION)
AddPermission(android.permission.ACCESS_LOCATION_EXTRA_COMMANDS)
AddPermission(android.permission.ACCESS_MOCK_LOCATION)
AddPermission(android.permission.ACCESS_NETWORK_STATE)
AddPermission(android.permission.ACCESS_SURFACE_FLINGER)
AddPermission(android.permission.ACCESS_WIFI_STATE)
AddPermission(android.permission.ACCOUNT_MANAGER)
AddPermission(android.permission.ADD_VOICEMAIL)
AddPermission(android.permission.AUTHENTICATE_ACCOUNTS)
AddPermission(android.permission.BATTERY_STATS)
AddPermission(android.permission.BIND_ACCESSIBILITY_SERVICE)
AddPermission(android.permission.BIND_APPWIDGET)
AddPermission(android.permission.BIND_DEVICE_ADMIN)
AddPermission(android.permission.BIND_INPUT_METHOD)
AddPermission(android.permission.BIND_NFC_SERVICE)
AddPermission(android.permission.BIND_NOTIFICATION_LISTENER_SERVICE)
AddPermission(android.permission.BIND_PRINT_SERVICE)
AddPermission(android.permission.BIND_REMOTEVIEWS)
AddPermission(android.permission.BIND_TEXT_SERVICE)
AddPermission(android.permission.BIND_VPN_SERVICE)
AddPermission(android.permission.BRICK)
AddPermission(android.permission.CHANGE_CONFIGURATION)
AddPermission(android.permission.CHANGE_NETWORK_STATE)
AddPermission(android.permission.CLEAR_APP_CACHE)
AddPermission(android.permission.CLEAR_APP_USER_DATA)

 

[aldomoscarda]

I also try to change to this, but it DID NOT WORK.

MANIFEST
'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: http://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="9" android:targetSdkVersion="28"/>
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
SetApplicationAttribute(android:networkSecurityConfig, @xml/network_security_config)
CreateResource(xml, network_security_config.xml,
<network-security-config>
<base-config cleartextTrafficPermitted="true">
<trust-anchors>
<certificates src="system" />
</trust-anchors>
</base-config>
</network-security-config>
)
AddPermission(android.permission.WRITE_EXTERNAL_STORAGE)
AddPermission(android.permission.READ_EXTERNAL_STORAGE)
AddPermission(android.permission.ACCESS_CHECKIN_PROPERTIES)
AddPermission(android.permission.ACCESS_COARSE_LOCATION)
AddPermission(android.permission.ACCESS_FINE_LOCATION)
AddPermission(android.permission.ACCESS_LOCATION_EXTRA_COMMANDS)
AddPermission(android.permission.ACCESS_MOCK_LOCATION)
AddPermission(android.permission.ACCESS_NETWORK_STATE)
AddPermission(android.permission.ACCESS_SURFACE_FLINGER)
AddPermission(android.permission.ACCESS_WIFI_STATE)
AddPermission(android.permission.ACCOUNT_MANAGER)
AddPermission(android.permission.ADD_VOICEMAIL)
AddPermission(android.permission.AUTHENTICATE_ACCOUNTS)
AddPermission(android.permission.BATTERY_STATS)
AddPermission(android.permission.BIND_ACCESSIBILITY_SERVICE)
AddPermission(android.permission.BIND_APPWIDGET)
AddPermission(android.permission.BIND_DEVICE_ADMIN)
AddPermission(android.permission.BIND_INPUT_METHOD)
AddPermission(android.permission.BIND_NFC_SERVICE)
AddPermission(android.permission.BIND_NOTIFICATION_LISTENER_SERVICE)
AddPermission(android.permission.BIND_PRINT_SERVICE)
AddPermission(android.permission.BIND_REMOTEVIEWS)
AddPermission(android.permission.BIND_TEXT_SERVICE)
AddPermission(android.permission.BIND_VPN_SERVICE)
AddPermission(android.permission.BRICK)
AddPermission(android.permission.CHANGE_CONFIGURATION)
AddPermission(android.permission.CHANGE_NETWORK_STATE)
AddPermission(android.permission.CLEAR_APP_CACHE)
AddPermission(android.permission.CLEAR_APP_USER_DATA)

'End of default text.

 

[KMatle]

Can you post the unfiltered logs? (Just uncheck the box next to the logs). There must be a message as Erel mentioned.

Set targetSDK to <25 (if you don't want to publish your app to google play) and try again.

 

[aldomoscarda]

SOOOLVEED!! thank @KMatle

 

[KMatle]

Yes... but... It's VERY important to use RSA/AES (= https) so that the connection is ecrypted. OKHttpUtils does this automatically for you. Otherwise all of the traffic can be hacked/read easily. Take care of it when you publish such an app. Customers will NOT like it and you WILL get into problems.

 

[KMatle]

Another one: I can access your system via my browser just by typing the IP address from your post XAMPP ist good for test environments but it's not for production systems.

Note: Of course I will not do anything (but I could).

 

[aldomoscarda]

Thanks @KMatle! I'll keep it in mind.

 

[Semen Matusovskiy]

From November 1, 2019 Google Play requires targetSDKVersion at least 28.

Try to add <uses-library android:name="org.apache.http.legacy" android:required="false"/>
This line fixes troubles with Apache websites - see https://developer.android.com/about/versions/pie/android-9.0-changes-28