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. captain hawak

    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. Xela

    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.