Android Question get reference of a view added via service to the windowmanager

[intera]

Well, I do not really know how to explained but will try

So I have a service that under certain conditions put a panel on screen covering all the screen (later I will have to put a image on the panel but that will be another question...)for any aplication runnning (so it is a with the manifest
AddPermission(android.permission.SYSTEM_ALERT_WINDOW)...and so on)so it does not matter if my activity is runnning or not the panel will overlay the fullscreen ...(yes it can be annoying for the user but so far I do not care, it will be only a few secs until another condition is meeted)

I did it like this:

Dim r As Reflector
r.Target = r.GetContext
Dim cwm As Object = r.RunMethod2("getSystemService", "window", "java.lang.String")
Dim ScreenShot As Panel 

ScreenShot.Initialize("ScreenShot")
ScreenShot.Color=Colors.ARGB(33,0,255,0)
Dim layoutParameters As Object
Dim i As String = "java.lang.int"
layoutParameters = r.CreateObject2("android.view.WindowManager$LayoutParams", Array As Object(widthPixels, heightPixels, 0, 0, 2007,8+32+256+262144,-3), Array As String(i, i, i, i, i, i,i))
                    r.Target = cwm 
                    r.RunMethod4("addView", Array As Object(ScreenShot, layoutParameters),Array As String("android.view.View", "android.view.ViewGroup$LayoutParams"))

then in the same sub inside the service under other conditions the panel should be removed with this code

r.Target = cwm
           
            r.RunMethod4("removeView",Array As Object (ScreenShot),Array As String( "android.view.View")

but this give the error:


r.RunMethod4("removeView",Array As Object (ScreenShot),Array As String( "android.view.View"))
java.lang.IllegalArgumentException: View not attached to window manager


at android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:402)
at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:304)
at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:79)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at anywheresoftware.b4a.agraham.reflection.Reflection.runmethod(Reflection.java:216)
at anywheresoftware.b4a.agraham.reflection.Reflection.RunMethod4(Reflection.java:857)
at b4a.example.zephyrservice._gesture_ontouch(zephyrservice.java:329)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:153)
at flm.b4a.gesturedetector.GestureDetectorForB4A$1.onTouch(SourceFile:86)
at android.view.View.dispatchTouchEvent(View.java:7456)


at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2264)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1995)
at android.view.View.dispatchPointerEvent(View.java:7641)
at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3682)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3613)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4804)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4783)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4875)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:174)
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:4854)
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:4894)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
at android.view.Choreographer.doCallbacks(Choreographer.java:562)
at android.view.Choreographer.doFrame(Choreographer.java:530)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735),,,bla bla bla




BTW:all the dim (specially the panel one) are inside the same sub and out of any if/then


I think that the problem is that this function when start keep looking for the false condition continuesly so I guess every time a "dimmed" the panel I loose the reference.....But As I need/want a service for this cannot "dimmed" a Panel on ProcessGlobals(I know would be much easier to do it in an activity...but not interested on doing it like that)

Any sugestion the get the right view¿?¿
PS:I read somewhere in the forum that getViewById does not work..
Many thanks in advanced

 

[Erel]

Have you tried calling:

ScreenShot.RemoveView

 

[intera]

Have you tried calling:

ScreenShot.RemoveView

Thanks Erel!!!
But it does not work either (it is null...):



ScreenShot.RemoveView
java.lang.NullPointerException..bla bla bla

Maybe if Icould list all the view attached to the windowManager and get the right one by the Initialized name....

 

[Erel]

Can you post the full error message?

 

[intera]

your wish is my command

zephyrservice_gesture_ontouch (B4A line: 621)
ScreenShot.RemoveView 'esto da null
java.lang.NullPointerException


at b4a.example.zephyrservice._gesture_ontouch(zephyrservice.java:383)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:153)
at flm.b4a.gesturedetector.GestureDetectorForB4A$1.onTouch(SourceFile:86)
at android.view.View.dispatchTouchEvent(View.java:3881)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:903)
at android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2227)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1886)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)


at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)
java.lang.RuntimeException: java.lang.NullPointerException
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:195)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:153)
at flm.b4a.gesturedetector.GestureDetectorForB4A$1.onTouch(SourceFile:86)
at android.view.View.dispatchTouchEvent(View.java:3881)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:903)
at android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2227)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1886)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)

 

[Erel]

Are you removing the view inside the OnTouch event? It might be called multiple times. Use CallSubDelayed to call a sub that removes the view and make sure that it is only called once.

 

[intera]

Hi Erel
thanks for the reply finally what i did was detect the touch only after the "fling" with the amazing gestureLib, so this method only happens once, so far so good,now the problem come to try to do some animations...but I surrender
BTW this is the thread I create 4 the animation
http://www.b4x.com/android/forum/threads/updateviewlayout-on-windomanager-problem.31122/

Thanks again