Java Question onGenericMotionEvent on a Google Glass Wrapper Library (GDK.JAR)

Alberto Iglesias

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Dears Users, can you help me with this event onGenericMotionEvent on my new Google Glass Library....

The HelloWorldActivity.java develop in ADT and work 100%, it´s intercept all types of touch in Google Glass Touchpad.

The FirstLib.java is a wrapper of gdk.jar and I´m compiling with SIMPLE LIBRARY COMPILER and compile OK and works OK in B4A but the touchs is not intercepting, what I have to do wrong? The code is basicly the same.

I think the onGenericMotionEvent is not called, but where tu put them?

Please, only left this to this library works!
 

Attachments

  • HelloWorldActivity.zip
    1.4 KB · Views: 279
  • FirstLib.zip
    1.4 KB · Views: 282

Erel

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You can handle the onGenericMotionEvent by following these steps:
1. Add the following class to your library:
B4X:
package anywheresoftware.b4a.objects;

import android.app.Activity;
import android.view.MotionEvent;
import anywheresoftware.b4a.BA;

public class ActivityEx extends Activity {

   @Override
   public boolean onGenericMotionEvent(MotionEvent event) {
     try {
       BA ba = (BA) this.getClass().getField("processBA").get(null);
       ba.raiseEvent(null, "activity_ongenericmotionevent", event);
       return true;
     } catch (Exception e) {
       throw new RuntimeException(e);
     }
   }
   @Override
   public void onUserInteraction() {
     super.onUserInteraction();
     try {
       BA ba = (BA) this.getClass().getField("processBA").get(null);
       ba.raiseEvent2(null,true,  "activity_onuserinteraction", false);
     } catch (Exception e) {
       throw new RuntimeException(e);
     }
   }
}

Add the following line to your activity:
B4X:
#Extends: anywheresoftware.b4a.objects.ActivityEx

And handle the events in your code:
B4X:
Sub Activity_OnUserInteraction
   Log("OnUserInteraction")
End Sub

Sub Activity_OnGenericMotionEvent(event As Object)
   Log(event)
End Sub

The OnUserInteraction is just an example. You can remove it.
 

Alberto Iglesias

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I added this class in my library, but when compile with Simple Compile Library, got this error:

Starting step: Compiling Java code.
javac 1.7.0_21
H:\Android\Library\GoogleGlassLibrary\GlassLib\src\anywharesoftware\b4a\sample\FirstLib.java:38: error: class ActivityEx is public, should be declared in a file named ActivityEx.java
public class ActivityEx extends Activity {
^
1 error

Error.
 

Erel

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DreamService:

B4X:
package anywheresoftware.b4a.objects;

import java.lang.ref.WeakReference;

import android.content.Context;
import android.content.Intent;
import android.service.dreams.DreamService;
import android.view.ViewGroup;
import android.view.View.MeasureSpec;
import android.view.ViewGroup.LayoutParams;
import anywheresoftware.b4a.BA;
import anywheresoftware.b4a.BALayout;
import anywheresoftware.b4a.BA.Events;
import anywheresoftware.b4a.BA.Hide;
import anywheresoftware.b4a.BA.ShortName;
import anywheresoftware.b4a.BA.Version;
import anywheresoftware.b4a.keywords.Common;
import anywheresoftware.b4a.objects.drawable.CanvasWrapper;

@Hide
public class DreamServiceWrapper extends DreamService{
   public static DreamServiceWrapper instance;
   public PanelWrapper panel;
   public CanvasWrapper canvas = new CanvasWrapper();
   public ViewGroup main;
   public Daydream dd;
   @Override
   public void onCreate() {
     super.onCreate();
     try {
       Intent i = new Intent(this, Class.forName(getPackageName() + ".dreamservice"));
       startService(i);
       instance = this;
       float deviceScale = getApplicationContext().getResources().getDisplayMetrics().density;
    BALayout.setDeviceScale(deviceScale);
     } catch (ClassNotFoundException e) {
       throw new RuntimeException("DreamService not found.");
     }
   }

   @Override
   public void onAttachedToWindow () {
     super.onAttachedToWindow();
     main = new MyBALayout(this);
     setContentView(main);
     panel = new PanelWrapper();
   }
   private class MyBALayout extends BALayout {
      public MyBALayout(Context context) {
       super(context);
     }

     @Override
      protected void onSizeChanged (int w, int h, int oldw, int oldh) {
         super.onSizeChanged(w, h, oldw, oldh);
         main.removeAllViews();
         BALayout layout = new BALayout(DreamServiceWrapper.this);
         main.addView(layout, new BALayout.LayoutParams(0, 0, w, h));
         panel.setObject(layout);
         if (dd != null)
           dd.ba.raiseEventFromUI(null, dd.eventName + "_sizechanged");
      }
   }
   @Override
   public void onDreamingStarted () {
     dd.ba.raiseEvent(null, dd.eventName + "_dreamstarted");
   }
   @Override
   public void onDreamingStopped() {
     dd.ba.raiseEvent(null, dd.eventName + "_dreamstopped");
   }
   @Override
  public void onDetachedFromWindow() {
     Common.Log("onDetachedFromWindow");
  }
   /**
    * Daydream is a new "screen saver" feature introduced in Android 4.2.
    *See the Daydream tutorial for more information.
    */
   @Events(values={"DreamStarted", "SizeChanged", "DreamStopped"})
   @ShortName("Daydream")
   @Version(1.0f)
   public static class Daydream {
     @Hide
     public BA ba;
     @Hide
     public String eventName;
     /**
      * Initializes the object and sets the subs that will handle the events.
      */
     public void Initialize(BA ba, String EventName) {
       instance.dd = this;
       this.ba = ba;
       this.eventName = EventName.toLowerCase(BA.cul);
     }
     /**
      * Manually finishes the dream.
      */
     public void Finish() {
       if (instance != null)
         instance.finish();
     }
     /**
      * Returns the main panel.
      */
     public PanelWrapper getPanel() {
       return instance.panel;
     }
     /**
      * A placeholder for Canvas.
      */
     public CanvasWrapper getCanvas() {
       return instance.canvas;
     }
     /**
      * Gets or sets whether user interacts will be handled instead of finishing the dream.
      */
     public void setInteractive(boolean v) {
       instance.setInteractive(v);
     }
     public boolean getInteractive() {
       return instance.isInteractive();
     }
     /**
      * Gets or sets whether the system bar appears.
      */
     public boolean getFullScreen() {
       return instance.isFullscreen();
     }
     public void setFullScreen(boolean v) {
       instance.setFullscreen(v);
     }
     /**
      * Gets or sets whether the screen should stay bright.
      */
     public void setScreenBright(boolean v) {
       instance.setScreenBright(v);
     }
     public boolean getScreenBright() {
       return instance.isScreenBright();
     }
   }

}
 

g7jjf

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Create a new file named ActivityEx.java and add it to your project. It should be under: anywheresoftware\b4a\objects.
I am also trying to compile this code using the Simple Library Compiler but get the following compile error :
Starting step: Compiling Java code.
javac 1.6.0_45
C:\Users\jon\Documents\B4ALibs\moga\src\anywheresoftware\b4a\objects\ActivityEx.java:9: method does not override or implement a method from a supertype
@override
^
1 error

Error.
Sorry, but I don't know how to correct this error. I am trying to write a library to interface to the moga controller and this code looks like it could do the job.
 

g7jjf

Member
Licensed User
Longtime User
Which version of Android.jar are you referencing? Try to reference the latest one.
I am using your Simple Library Compiler V 1.01. How do I reference Android.jar ?

I just copied your code in post #2 above to a file called C:\Users\jon\Documents\B4ALibs\moga\src\anywheresoftware\b4a\objects\ActivityEx.java. Ran your SLC, specified the project folder as C:\Users\jon\Documents\B4ALibs\moga, clicked compile and got the error mentioned above.
 
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