android - ImageButton in Linear Layout not clicked. Setting Listener from service -

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this different other post of nature because in service cannot name onclicklistener through xml have programatically.

i have imagebutton in xml file (it @ bottom):

     <?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical">  <horizontalscrollview> ... </horizontalscrollview>  <view     android:layout_width="match_parent"     android:layout_height="3dp"     android:background="@color/light_grey" />   <framelayout> ... </framelayout>  <view     android:layout_width="match_parent"     android:layout_height="3dp"     android:background="@color/light_grey" />  <linearlayout     android:layout_width="match_parent"     android:layout_height="50dp"     android:orientation="horizontal"     android:weightsum="3">      <imagebutton         android:id="@+id/deletebutton"         android:layout_width="0dp"         android:contentdescription="delete button"         android:focusable="false"         android:layout_height="50dp"         android:clickable="true"         android:background="@drawable/simplerect"         android:src="@drawable/deletebtn24dp"         android:layout_weight="1"/>  </linearlayout>

i set onclicklistener in service this:

imagebutton deletebtn = (imagebutton) mainkeyboard.findviewbyid(r.id.deletebutton);     deletebtn.setonclicklistener(new android.view.view.onclicklistener() {          public void onclick(view view1) {             log.i("debug_tag","button being clicked");             getcurrentinputconnection().setcomposingtext("",1);             getcurrentinputconnection().deletesurroundingtext(10000,10000);         }      });

however onclicklistener not being called. i'm not sure do, since way can set listener because doing service , not activity

it turned out needed add following attribute linear layout contained button:

 android:descendantfocusability="blocksdescendants"

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