android - How to reference the inflated view elements? -
i need on this. i'm inflating view. view card view spinner in it.
the view inflated on button click this:
itinerarydetailll = (linearlayout) findviewbyid(r.id.itinerarydetaillinearlayout); view childview = getlayoutinflater().inflate(r.layout.cardview, null); itinerarydetailll.addview(childview); now problem whenever click spinner in first inflated card view works fine on clicking on spinner in second inflated view gives me following error:
09-11 10:54:44.976 31698-31698/com.application.marketvisit e/inputeventreceiver: exception dispatching input event. 09-11 10:54:44.976 31698-31698/com.application.marketvisit e/messagequeue-jni: exception in messagequeue callback: handlereceivecallback 09-11 10:54:44.986 31698-31698/com.application.marketvisit e/messagequeue-jni: java.lang.nullpointerexception: attempt invoke virtual method 'void android.widget.filter.filter(java.lang.charsequence, android.widget.filter$filterlistener)' on null object reference @ android.widget.autocompletetextview.performfiltering(autocompletetextview.java:861) @ com.weiwangcn.betterspinner.library.material.materialbetterspinner.onfocuschanged(materialbetterspinner.java:49) @ android.view.view.handlefocusgaininternal(view.java:4962) @ android.view.view.requestfocusnosearch(view.java:7678) @ android.view.view.requestfocus(view.java:7657) @ android.view.view.requestfocus(view.java:7624) @ android.view.view.requestfocus(view.java:7603) @ com.weiwangcn.betterspinner.library.material.materialbetterspinner.ontouchevent(materialbetterspinner.java:74) @ android.view.view.dispatchtouchevent(view.java:8471) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ com.android.internal.policy.impl.phonewindow$decorview.superdispatchtouchevent(phonewindow.java:2369) @ com.android.internal.policy.impl.phonewindow.superdispatchtouchevent(phonewindow.java:1719) @ android.app.activity.dispatchtouchevent(activity.java:2742) @ android.support.v7.view.windowcallbackwrapper.dispatchtouchevent(windowcallbackwrapper.java:69) @ android.support.v7.view.windowcallbackwrapper.dispatchtouchevent(windowcallbackwrapper.java:69) @ com.android.internal.policy.impl.phonewindow$decorview.dispatchtouchevent(phonewindow.java:2330) @ android.view.view.dispatchpointerevent(view.java:8666) @ android.view.viewrootimpl$viewpostimeinputstage.processpointerevent(viewrootimpl.java:4123) @ android.view.viewrootimpl$viewpostimeinputstage.onprocess(viewrootimpl.java:3989) @ android.view.viewrootimpl$inputstage.deliver(viewrootimpl.java:3544) @ android.view.viewrootimpl$inputstage.ondelivertonext(viewrootimpl.java:3597) @ android.view.viewrootimpl$inputstage.forward(viewrootimpl.java:3563) @ android.view.viewrootimpl$asyncinputstage.forward(viewrootimpl.java:3680) @ android.view.viewrootimpl$inputstage.apply(viewrootimpl.java:3571) @ android.view.viewrootimpl$asyncinputstage.apply(viewrootimpl.java:3737) @ android.view.viewrootimpl$inputstage.deliver(viewrootimpl.java:3544) @ android.view.viewrootimpl$inputstage.ondelivertonext(viewrootimpl.java:3597) @ android.view.viewrootimpl$inputstage.forward(viewrootimpl. 09-11 10:54:44.988 31698-31698/com.application.marketvisit e/androidruntime: fatal exception: main process: com.application.marketvisit, pid: 31698 java.lang.nullpointerexception: attempt invoke virtual method 'void android.widget.filter.filter(java.lang.charsequence, android.widget.filter$filterlistener)' on null object reference @ android.widget.autocompletetextview.performfiltering(autocompletetextview.java:861) @ com.weiwangcn.betterspinner.library.material.materialbetterspinner.onfocuschanged(materialbetterspinner.java:49) @ android.view.view.handlefocusgaininternal(view.java:4962) @ android.view.view.requestfocusnosearch(view.java:7678) @ android.view.view.requestfocus(view.java:7657) @ android.view.view.requestfocus(view.java:7624) @ android.view.view.requestfocus(view.java:7603) @ com.weiwangcn.betterspinner.library.material.materialbetterspinner.ontouchevent(materialbetterspinner.java:74) @ android.view.view.dispatchtouchevent(view.java:8471) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ android.view.viewgroup.dispatchtransformedtouchevent(viewgroup.java:2405) @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:2106) @ com.android.internal.policy.impl.phonewindow$decorview.superdispatchtouchevent(phonewindow.java:2369) @ com.android.internal.policy.impl.phonewindow.superdispatchtouchevent(phonewindow.java:1719) @ android.app.activity.dispatchtouchevent(activity.java:2742) @ android.support.v7.view.windowcallbackwrapper.dispatchtouchevent(windowcallbackwrapper.java:69) @ android.support.v7.view.windowcallbackwrapper.dispatchtouchevent(windowcallbackwrapper.java:69) @ com.android.internal.policy.impl.phonewindow$decorview.dispatchtouchevent(phonewindow.java:2330) @ android.view.view.dispatchpointerevent(view.java:8666) @ android.view.viewrootimpl$viewpostimeinputstage.processpointerevent(viewrootimpl.java:4123) @ android.view.viewrootimpl$viewpostimeinputstage.onprocess(viewrootimpl.java:3989) @ android.view.viewrootimpl$inputstage.deliver(viewrootimpl.java:3544) @ android.view.viewrootimpl$inputstage.ondelivertonext(viewrootimpl.java:3597) @ android.view.viewrootimpl$inputstage.forward(viewrootimpl.java:3563) @ android.view.viewrootimpl$asyncinputstage.forward(viewrootimpl.java:3680) @ android.view.viewrootimpl$inputstage.apply(viewrootimpl.java:3571) @ android.view.viewrootimpl$asyncinputstage.apply(viewrootimpl.java:3737) @ android.view.viewrootimpl$inputstage.deliver(viewrootimpl.java:3544) @ android.view.viewrootimpl$inputstage.ondelivertonext(viewrootimpl.java this cardview.xml i'm inflating:
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v7.widget.cardview xmlns:card_view="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="400dp" card_view:cardelevation="5dp" card_view:cardusecompatpadding="true" card_view:layout_constrainttop_totopof="parent" android:layout_margintop="8dp" android:layout_marginleft="8dp" card_view:layout_constraintleft_torightof="parent" android:layout_marginstart="8dp"> <com.weiwangcn.betterspinner.library.material.materialbetterspinner android:id="@+id/zoneplanitineraryspinner" android:layout_width="240dp" android:layout_height="wrap_content" android:hint="select zone" app:met_floatinglabel="normal" android:layout_below="@id/deleteplanitinerary" android:layout_marginleft="20dp" /> </android.support.v7.widget.cardview> </linearlayout>
as possible, don't use multiple ids in 1 layout, android detects one, hence null object reference in stack trace.
according api guides:
an id need not unique throughout entire tree, should unique within part of tree searching (which may entire tree, it's best unique when possible).
https://developer.android.com/guide/topics/ui/declaring-layout.html#id
edit
since you're inflating new layouts same ids, try following:
view childview = getlayoutinflater().inflate(r.layout.cardview, null); materialbetterspinner spnr = childview.findviewbyid(r.id.zoneplanitineraryspinner); spnr.setonitemclicklistener(new adapterview.onitemclicklistener() { @override public void onitemclick(adapterview<?> parent, view view, int position, long id) { // new cardview layout spinner code goes here... } }); you should use newly inflated layout find views id.
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