B4J Tutorial Consuming http streams

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Nov 22, 2019

• #2

Added an option to disconnect the connection.

 

jcesar

Active Member

Licensed User

Longtime User

• Dec 12, 2019

• #3

Hi

Can i use this code to stream audio from a online radio ?

 

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Dec 13, 2019

• #4

Worth trying. Test it with jAudioTrack: https://www.b4x.com/android/forum/threads/jaudiotrack.37973/#content

 

woniol

Active Member

Licensed User

Longtime User

• Jan 6, 2020

• #5

Hi,

Can we have an exmaple code ported to B4A.
With the original custom OutputStream does not work with B4A.

 

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Jan 7, 2020

• #6

Please post your B4A project and explain what "does not work" means.

 

LucaMs

Expert

Licensed User

Longtime User

• Jan 7, 2020

• #7

Can you choose a better webcam, please? ?

 

Last edited: Jan 7, 2020

woniol

Active Member

Licensed User

Longtime User

• Jan 7, 2020

• #8

Changed:

B4X:

Private const PackageName As String = "b4j.example" '<------ change as needed

to

B4X:

Private const PackageName As String = "b4a.example" '<------ change as needed

and it works like a charm

 

Hypnos

Active Member

Licensed User

Longtime User

• May 1, 2020

• #9

Can this example run on raspberry pi ? I tried but no image display...

 

Erel

B4X founder

Staff member

Licensed User

Longtime User

• May 3, 2020

• #10

The code itself should work. Test it on the PC first, it is possible that the mjpeg stream used in that example is no longer working.

 

Hypnos

Active Member

Licensed User

Longtime User

• May 3, 2020

• #11

Erel said:

The code itself should work. Test it on the PC first, it is possible that the mjpeg stream used in that example is no longer working.

Click to expand...

I think it may related to the java/jfx version on raspberry pi, I followed below post to change to another version and I can see the webcam image but this time I got some other issue (e.g. button not work, screen background changed to black... etc..) : (

Using JavaFX on Raspberry Pi 3 with Gluon

In this post, I am going to detail the steps to get a simple JavaFX application running on the Raspberry Pi 3 using Gluon. Hardware For this setup, I used the Raspberry Pi 3 with the official 7" touchscreen connected. Raspbian Installation First off, download Raspbian from...

www.wimdeblauwe.com

 

Johan Hormaza

Well-Known Member

Licensed User

Longtime User

• Mar 16, 2023

• #12

Erel said:

Note that this code can be easily ported to B4A.

Click to expand...

Erel said:

Note that this code can be easily ported to B4A.

Click to expand...

And for B4i?

 

GMan

Well-Known Member

Licensed User

Longtime User

• Mar 17, 2023

• #13

May be simple as this (don't know) ?

B4X:

Private const PackageName As String = "b4i.example" '<------ change as needed

 

Johan Hormaza

Well-Known Member

Licensed User

Longtime User

• Mar 17, 2023

• #14

GMan said:

May be simple as this (don't know) ?

B4X:

Private const PackageName As String = "b4i.example" '<------ change as needed

Click to expand...

It's not that easy

 

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Mar 19, 2023

• #15

This will not work with B4i. The underlying http methods are completely different. The low level solution does work with B4i: https://www.b4x.com/android/forum/threads/b4x-class-mjpeg-decoder.73702/#content

 

b4x-de

Active Member

Licensed User

Longtime User

• Jun 23, 2024

• #16

There was a discussion on this line:

B4X:

Private const PackageName As String = "b4i.example" '<------ change as needed

Instead of updating this line in every new project that uses a different package name, you could be more flexible with the following solution on B4J. It allows you to include the class in a library without worrying about the package name.

B4X:

' ...
Dim strFullClassName As String
Dim joMe As JavaObject

joMe = Me
strFullClassName = joMe.RunMethod("getFullQualifiedClassname", Null)
out.InitializeNewInstance($"${strFullClassName}$MyOutputStream"$, Array(Me))

' ...

#If Java

public String getFullQualifiedClassname() {

 return this.getClass().getName();

}

#End If