Java Question Newbie Creating Library With Events

I am trying to create a library with events but i dont get to raise the event. I can not imagine what i am doing wrong.

The java code is the following one.

package anywheresoftware.b4a.sample;
import anywheresoftware.b4a.BA;
import anywheresoftware.b4a.BA.ShortName;
import anywheresoftware.b4a.BA.Events;

@ShortName("FirstLib")
@Events(values={"OnMultiplyElapsed (result As Int)"})
public class FirstLib {

private String _eventName;

public void Initialize(String eventName) {
this._eventName = eventName;
}

/**
* Multiplies x 2
* @param x
* @return
*/
public int multiply(BA ba, int x) {

int result;
result = x * 2;
ba.raiseEvent(this, _eventName + "_OnMultiplyElapsed", new Object[]{result});
return x * 2;
}
}



And the b4Android code is the following one.

Sub Activity_Create(FirstTime As Boolean)
f.Initialize("FirstLibIMP")
Log(f.multiply (5))
End Sub

Sub FirstLibIMP_OnMultiplyElapsed (result As Int)

End Sub


The event is never launched !!!!!

in ba.raiseEvent(this, _eventName + "_OnMultiplyElapsed", new Object[]{result}); 'OnMultiplyElapsed' must be lowercase so the line should look as:

Also ensure that your _eventName property is properly lower cased:


BA.cul means to convert the String to lower case based on the device's current locale, not essential but i see it's always used in the official B4A libraries so i use it in my own libraries too.
I guess it makes the code more compatible with various foreign languages.

Martin.

BA.cul means to convert the String to lower case based on the device's current locale

Click to expand...

Small correction. BA.cul = Locale.US. The purpose of using it is to avoid issues with device locale issues.

See this link for one example: Dotted and dotless I - Wikipedia, the free encyclopedia

Problem still persist.

I have made the changes that you recommended but the event is not launched.

This is copy of the log

>>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
CheckJNI is ON
--- registering native functions ---
Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=b4a.example/.main }
Start proc b4a.example for activity b4a.example/.main: pid=310 uid=10047 gids={3003, 3002, 1015}
Shutting down VM
adbd disconnected
NOTE: attach of thread 'Binder Thread #3' failed
generated scanline__00000077:03545404_00000004_00000000 [ 47 ipp] (67 ins) at [0x375ee0:0x375fec] in 417662 ns
generated scanline__00000077:03515104_00000000_00000000 [ 33 ipp] (47 ins) at [0x3c43c0:0x3c447c] in 358315 ns
Displayed activity b4a.example/.main: 1857 ms (total 1857 ms)
** Activity (main) Create, isFirst = true **
ignoring event: firstlibimp__onmultiplyelapsed
10
** Activity (main) Resume **
Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@44f7c5f0

The problem is that the activity is considered to be paused until Activity_Create is finished.

Move your code to Activity_Resume.

Thank you Erel. All is working !!!!

This is amazing IDE. I can make application so quick without learning Android. Thanks for the quick support. The community is going to make this program to be a MUST for developing apps.