Develop Reference

Titanium Hyperloop access to android.os.SystemProperties

I have been trying a ( i hope) simple bit of Android hyperloop code directly within a titanium project (using SDK 7.0.1.GA and hyperloop 3).
var sysProp = require('android.os.SystemProperties');
var serialNumber = sysProp.get("sys.serialnumber", "none");
But when the app is run it reports
Requested module not found:android.os.SystemProperties
I think this maybe due to the fact that when compiling the app (using the cli) it reports
hyperloop:generateSources: Skipping Hyperloop wrapper generation, no usage found ...
I have similar code in a jar and if I use this then it does work, so I am wondering why the hyperloop generation is not being triggered, as I assume that is the issue.
Sorry should have explained better.
This is the jar source that I use, the extraction of the serial number was just an example (I need access to other info manufacturer specific data as well), I wanted to see if I could replicate the JAR functionality using just hyperloop rather that including the JAR file. Guess if it's not broke don't fix it, but was curious to see if it could be done.

So with the feedback from #miga and a bit of trial and error, I have come up with a solution that works really well and will do the method reflection that is required. My new Hyperloop function is
function getData(data){
var result = false;
var Class = require("java.lang.Class");
var String = require("java.lang.String");
var c = Class.forName("android.os.SystemProperties");
var get = c.getMethod("get", String.class, String.class);
result = get.invoke(c, data, "Error");
return result;
}
Where data is a string of the system property I want.
I am using it to extract and match a serial number from a Samsung device that is a System Property call "ril.serialnumber" or "sys.serialnumber". Now I can use the above function to do what I was using the JAR file for. Just thought I'd share in case anyone else needed something similar.

It is because android.os.SystemProperties is not class you can import. Check the android documentation at https://developer.android.com/reference/android/os/package-summary.html
You could use
var build = require('android.os.Build');
console.log(build.SERIAL);
to access the serial number.

Streaming mp3 in Xamarin Android MediaManager not working

I'm using this nu-get package to stream mp3 url in a Xamarin Android project:
https://github.com/martijn00/XamarinMediaManager
I followed the instructions in the link up there... and it shows the music playing in the notification bar but it is not working (no sound and it's not even starting the song).
Code snippet:
clickButton.Click += (sender, args) =>
{
ClickButtonEvent();
};
private static async void ClickButtonEvent()
{
await CrossMediaManager.Current.Play("http://www.montemagno.com/sample.mp3");
}
I built the sample included in the link, and I got the same result from their sample. Also deployed on real device too, same result!
Image:
Am I missing something ?
Or is the library broken ?

I ran into this using Android Emulator on Hyper-v. It turns out that the network is set to internal. So the http://www.montemagno.com/sample.mp3 could not be found. My workaround:
Hyper-v -> Virtual Switch Manager, add an external network.
Hyper-v -> Virtual Machines->Settings, add new hardware->Network adapter and set to external network.
"Visual Studio Emulator for Android" desktop app, launch phone vm,
in Visual Studio, deploy and run app.
Sound should work from external source now.

Permissions maybe? In the project site it states that for Android:
You must request AccessWifiState, Internet, MediaContentControl and
WakeLock permissions

By default example use ExoPlayerAudioService.
There are issue with url escape in ExoPlayerAudioService.GetSource method
private IMediaSource GetSource(string url)
{
string escapedUrl = Uri.EscapeDataString(url);
var uri = Android.Net.Uri.Parse(escapedUrl);
var factory = URLUtil.IsHttpUrl(escapedUrl) || URLUtil.IsHttpsUrl(escapedUrl) ? GetHttpFactory() : new FileDataSourceFactory();
var extractorFactory = new DefaultExtractorsFactory();
return new ExtractorMediaSource(uri
, factory
, extractorFactory, null, this);
}
string escapedUrl = Uri.EscapeDataString(url);
I.E. http://example.com/path_to_audio.mp3 will be escaped to "http%3A%2F%2Fexample.com%2Fpath_to_audio.mp3" as result HTTP error.
To fix just skip url escape.

i want to create android app to control arduino car with bluetooth

my project has 2 steps:
Establish a connection between my phone and the arduino board
Use accelerometer sensor to move the car
The motion part i can handle it, but i can't find a way to use bluetooth. I just can't figure how to work with this Api.
What should i do to connect to the arduino and start sending signals to it?

Check this link out, its a Guide on Connecting Android Device with Arduino and Bluetooth
I'll just paste the Steps here, in case the link expires someday.
At the top of your source code, include these libs.
#include "SoftwareSerial.h"
#include "Bluetooth.h"
To start using it, at the top of your source declare a public variable to access it:
Bluetooth *blue = new Bluetooth(2, 3);
With Bluetooth(RX_Pin, TX_Pin)
The default pin is 1234, name is “PNGFramework” and baudrate is 9600
Now, on your Setup(), add the follow line:
void setup(){
Serial.begin(9600);
blue->setupBluetooth();
}
Send a message when we receive some data from Serial.
void loop(){
String msg = blue->Read();
if(msg.length() > 1){
Serial.print("Received: ");
Serial.println(msg);
}
if(Serial.available()){
blue->Send("Example message#");
}
}
In Android
First, create a bluetooth object, use the following code, make sure to use the same RobotName that you used in the Arduino project. (default is “PNGFramework”).
BluetoothArduino mBlue = BluetoothArduino.getInstance("PNGFramework");
To connect with the Arduino, add the command bellow:
mBlue.Connect();
Now, to read a message, run the command:
String msg = mBlue.getLastMessage();

C++ Builder WSDL client for Android

I'm having a confusing problem. I'm trying to make a Web cleint that uses WSDL.
I'm using C++ RAD Studio 10 Seattle, but the same problem occured in RAD Studio XE8(older version).
1.I create a Multi-Device Application, add one Edit component and one Button.
2.I create a WSDL Importer by changing the location of the WSDL file to : "http://www.w3schools.com/webservices/tempconvert.asmx?WSDL" and leave all other setting to default.
3.On ButtonClick event of the button I write two lines of code :
_di_TempConvertSoap Converter = GetTempConvertSoap(true,
"http://www.w3schools.com/webservices/tempconvert.asmx?WSDL");
Edit1->Text = Converter->CelsiusToFahrenheit("32");
So after these three steps I have one unit, which is the main Unit with the Form and with the button event. And one file "tempconvert.cpp" that the WSDL Importer has generated. It quite actually just translates the WSDL code to a C++ one and defines the method to communicate with the server. In my case I have two methods : FahrenheitToCelsius() and CelsiusToFahrenheit(), in the example I use CelsiusToFahrenheit().
I compile it to 32-bit Windows platform, run it and when I click the button, the result "89.6" appears in the text of the Edit component. So this is working as expected.
But when I change the target platform to "Android" and use my mobile phone "Samsung GT-I8262" with Android 4.1.2 and run the project, it just stops and exits. I debugged the problem and it stops at the first command in "tempconvert.cpp" in RegTypes() method.
// ************************************************************************
//
// This routine registers the interfaces and types exposed by the WebService.
// ************************************************************************ //
static void RegTypes()
{
/* TempConvertSoap */
InvRegistry()->RegisterInterface(__delphirtti(TempConvertSoap), L"http://www.w3schools.com/webservices/", L"utf-8");
InvRegistry()->RegisterDefaultSOAPAction(__delphirtti(TempConvertSoap), L"http://www.w3schools.com/webservices/%operationName%");
InvRegistry()->RegisterInvokeOptions(__delphirtti(TempConvertSoap), ioDocument);
/* TempConvertSoap.FahrenheitToCelsius */
InvRegistry()->RegisterMethodInfo(__delphirtti(TempConvertSoap), "FahrenheitToCelsius", "",
"[ReturnName='FahrenheitToCelsiusResult']", IS_OPTN);
/* TempConvertSoap.CelsiusToFahrenheit */
InvRegistry()->RegisterMethodInfo(__delphirtti(TempConvertSoap), "CelsiusToFahrenheit", "",
"[ReturnName='CelsiusToFahrenheitResult']", IS_OPTN);
/* TempConvertHttpPost */
InvRegistry()->RegisterInterface(__delphirtti(TempConvertHttpPost), L"http://www.w3schools.com/webservices/", L"utf-8");
InvRegistry()->RegisterDefaultSOAPAction(__delphirtti(TempConvertHttpPost), L"");
}
#pragma startup RegTypes 32
Does someone have any idea why this might be happening? I tried on two other Samsung phones and it didn't work. The error that shuts the program down is "Segmentation fault(11)", and more precisely it stops at the following line of code in "System.pas" file :
u_strFromUTF8(PUChar(Dest), MaxDestChars, DestLen, MarshaledAString(Source), SourceBytes, ErrorConv);
Here is some info that I've found about the function:
u_strFromUTF8 - function that converts a UTF-8 string to UTF-16.
UCHAR is a Byte(in Delphi), so PUCHAR is a pointer to Byte.
I cannot se what could possibly go wrong with this function which apparently only converts a string.
So my question is why does the project work on Windows 32 bit version, but on Android it throws Segmentation fault(11)?
I hope I could find a solution for this problem. I will keep looking.
Thank you,
Zdravko Donev :)
UPDATE:
I disassembled the line:
InvRegistry()->RegisterInterface(__delphirtti(TempConvertSoap), L"http://www.w3schools.com/webservices/", L"utf-16");
to get :
TInvokableClassRegistry *Class = InvRegistry();
TTypeInfo *Info = __delphirtti(TempConvertSoap);
UnicodeString Namespace = "http://www.w3schools.com/webservices/";
UnicodeString WSDLEncoding = "utf-8";
Class->RegisterInterface(Info, Namespace, WSDLEncoding);
And I saw that the problem occurs when calling InvRegistry() function, but I still haven't found the problem as I cannot reach the source code of the function.

I found a solution.
I deleted the line
#pragma startup RegTypes 32
and called the method RegTypes() on my own when I create the form and it worked.

Android Jwebsocket custom protocol

I am opening a connection setting up a custom protocol like this:
WebSocketSubProtocol d = new WebSocketSubProtocol("MyCustomProto",WebSocketEncoding.TEXT);
mJWC.addSubProtocol(d);
mJWC.open(mURL);
But... Server side, I receive tis in the protocol string
"org.jwebsocket.json MyCustomProto"
How can I remove from the string the "org.jwebsocket.json" ?
I don't wanna do it server side...
Thanks!

I will answer to my own question.
By calling the "addSubProtocol" doesn't seem to be the right solution for couple of reasons:
if you call those 3 lines of code multiple time (if the first time the connection failed for example..) well the the protocol string would be something like
"org.jwebsocket.json MyCustomProto MyCustomProto"
It just keep adding the protocol..
So I found a turn around. Now I don't use that "addSubProtocol" but instead I defined the protocol directly when I create the socket
mJWC = new BaseTokenClient("client||"+code+"||"+name,WebSocketEncoding.TEXT);
Voila.. Now no more "org.jwebsocket.json" anymore