Android Question Sending JSON data to B4J server.

DonManfred said:

B4J? Shouldn´t the thread created in the B4J Forum then?

Posting the json is the same in B4A/B4J... There are a lot of examples in the forum. Just search for them.
What you need is to know how to get it in B4J.

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Eme Fibonacci said:

After researching on forum I made a code work.

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Eme Fibonacci said:

After researching on forum I made a code work.

However, I would like something better. More "professional". More safe.

Do you have an example that sends JSON code and gets in BJ4?

Thank you.

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OliverA said:

What code and what did you get to work? Are you already sending/receiving JSON or would you like to send/receive JSON? If you're staying in the B4x environment, then why not serialize? Not everything has to be JSON.

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OliverA said:

You convert the image to a byte array, send it, then convert byte array back to an image. How to do it? Look at the example's @Erel gives for B4XSerializator (source for B4A, B4J and B4i are given). Link: https://www.b4x.com/android/forum/threads/b4x-network-asyncstreams-b4xserializator.72149/.

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Eme Fibonacci said:

I can't put an image in serialized object. Right?

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LucaMs said:

JSON is just text; you should convert the image to a string (base64)

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JsonList.Initialize
    JsonZeileMap.Initialize
    JsonZeileMap.put("Action", "Insert")
    JsonZeileMap.put("uname", "xxxx")
    JsonZeileMap.put("upw", SHA256Hash("pw"))
    JsonZeileMap.put("umail", "kk@kk.de")
    JsonZeileMap.put("myimage", SomeBase64String)
     
    JsonList.add(JsonZeileMap)
 
    Dim JSONGenerator As JSONGenerator
    JSONGenerator.Initialize2(JsonList)
 
    Dim JSONstring As String
    JSONstring = JSONGenerator.ToString
    Log(JSONstring)

    Dim LoginJob As HttpJob
    LoginJob.Initialize("InsertNew", Me)
    LoginJob.PostString(Servername & "/login/loginpre.php", JSONstring)

$json = file_get_contents("php://input");

    $jsall = array();
    $jsone = array();

    $jsall=json_decode($json, true); //get the LIST

    $jsone=$jsall[0]; //first MAP of the LIST

    //get contents of the map (looks like map.get("umail")
    $umail=mysqli_real_escape_string($con,$jsone["umail"]);
    $upw=mysqli_real_escape_string($con,$jsone["upw"]);
    $uname=mysqli_real_escape_string($con,$jsone["uname"]);