1. F

    Android Question Unsupported option: --v4-signing-enabled, B4A 11.8

    Hi everyone, I'm trying to rebuild my old app, but this error message shows: Unsupported option: --v4-signing-enabled. See --help for supported options. I downloaded the files from, but the problem is not fixed, I tried to build a project on Android Studio using...
  2. ahmadkhazali

    Android Question problem load bitmap with byte() tcp

    hi i send image with c# server to b4a tcp client and after get error load bitmap error. this code very good work for udp just error in tcp from b4a i think problem for tcp b4a img = Image.FromFile(@"C:\Users\at\Pictures\download.jpeg"); ms = new MemoryStream()...
  3. Mikhail ivan

    Spanish Problema con el diseñador de IDE B4A /// Problem with the IDE designer B4A

    Buenas tardes mi nombres el Mikhail y tengo el sigiente problema desde un par de dias: mi problema surge al momento de diseñar la pantalla en el activity con botones, label etc. mil B4A lo instale desde la pagina oficial y segui todos los pasos correctamente. Pero desde ayer, es la primera vez...
  4. M

    iOS Question iSpeechRecognition unreliable - not working well

    Hi everyone, i'm building an app that has to recognize single words and validate them in a certain period of time (ex. 1min). Like a game counting correct words. I tried to use speech recognition example at beginning, adding only the part to get the single word (and not the full sentence that...
  5. Alessandro Zuppa

    Italian Problemi con Panel

    Salve a tutti, questo è il mio primo thread, spero quindi di porre correttamente il problema che riscontro. Nella creazione/composizione di un'Activity quando aggiungo più di x Panel il layout non si comporta più in modo corretto. Vi allego qui due immagini e un esempio di codice. Se qualcuno...
  6. Pablo Torres

    iOS Question Problem with MKWebView

    Hi everybody, I need a hand with a problem I am stucked with I have a funny issue with MKWebView: I am trying to use a PCI plattform (mercado pago) to process payments on an app I'm developing on iOS, everithing works fine but when I enter the data of the card It gets stuck trying to process the...
  7. B

    Android Question OkHTTPUtlis2 Connection problem on Android 10

    Hello, I post data to my server with OkHttpUtils2 and it works. But my server not have SSL and that is why my program does not work in Android 10. I do not know what to do to connect to the server in Android 10 without SSL.
  8. J

    Android Question [Solved] Problem update app in the same package

    Hi , I create application in b4a version 5.5, which has the signature key used by the debugger (it doesn´'t have a private key), I install the apk on several devices, now I update application using b4a version 9.5, however when reinstalling it, the error "App not install" is displayed , both...
  9. james_sgp

    Android Question MQTT lost connection, with good Wifi Signal

    Looking for advice, I`ve been trying an app using MQTT over wifi. I have a strong wifi signal all the way out at 600+m (clear line of sight), but I`m losing connection to the MQTT Broker at about 150m? I`m sending about 10KB on data at a time, and the Broker is responding back with about 2KB of...
  10. james_sgp

    UDP over MQTT Loosing Packets?

    Looking for advice, I`ve been trying an app using MQTT over wifi. I have a strong wifi signal at 600+m, but I`m losing connection to the MQTT Broker at about 150m? I`m sending about 10KB on data at a time, and the Broker is responding back with about 2KB of data. I`m unable to reconnect...
  11. MarkusR

    B4J Question [solved] problem client server solution with ssl

    so i made a server in b4j with jServer (see #3) it get a request and it send a list with userdefined type as bytes as response. that works fine if me test this from browser. now i try to make a b4j app that make this get request vis https:// + username & password but i get a error here :(...
  12. M

    Android Question Strange problem, help.

    Hello guys I got a project I'm working right now, and I'm using a set of customlistview, which results are a another set, a define number of times. Each of these elements contains -Image -Transparent buttom/ white frame when the focus is on the element. -Link -Title The focus was created with...
  13. MarkusR

    Android Question [solved] different font width at different devices^^

    i have a sub that make a texture but the text width looks different if me compare a tablet with a phone. why? my goal is to have the same texture at all devices. currently one device looks good and at the other the text is cut. is there a way to use a static font in asset folder or something...
  14. MarkusR

    B4J Question [solved] problem with array data in json

    maybe is someone more firm in json parsing i have this json and need iterate this array(list) "List_Packages" and the data there "Pos_A_mm" and below "X","Y","Z" my attempt Dim J As JSONParser J.Initialize(JSON) Dim Map1 As Map Map1 = J.NextObject Dim...
  15. M

    B4J Question Mouse pointer problem

    Hello, I made a full screen application in B4J (Raspberry Pi 3 model B with Raspbian) and when I move the mouse to the corner of the screen and I go back, the cursor changes to a black square. Does anyone know how to fix this problem? Thanks in advance.