your content must have a listview whose id attribute is 'android.r.id.list' -

your content must have a listview whose id attribute is 'android.r.id.list' -

this question has reply here:

your content must have listview id attribute 'android.r.id.list' 9 answers

i have searched forum similar issue , far can tell doing way other solutions suggest, still error "your content must have listview id attribute android.r.id.list"

my mainactivity.java looks like:

public class mainactivity extends listactivity { @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); if (savedinstancestate == null) { getfragmentmanager().begintransaction() .add(r.id.container, new placeholderfragment()).commit(); } setlistadapter(new arrayadapter<string>(this, android.r.layout.simple_list_item_1, new arraylist<string>())); }

my activity_main.xml:

<framelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="dk.beatpro.mibfinder.mainactivity" tools:ignore="mergerootframe" />

and fragment_mail.xml:

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingbottom="@dimen/activity_vertical_margin" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" tools:context="dk.beatpro.mibfinder.mainactivity$placeholderfragment" > <button android:id="@+id/button_findmib" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/button_findmib" /> <listview android:id="@android:id/list" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/button_findmib" /> </relativelayout>

but next runtime error:

06-24 09:00:07.726: e/androidruntime(10542): fatal exception: main 06-24 09:00:07.726: e/androidruntime(10542): process: dk.beatpro.mibfinder, pid: 10542 06-24 09:00:07.726: e/androidruntime(10542): java.lang.runtimeexception: unable start activity componentinfo{dk.beatpro.mibfinder/dk.beatpro.mibfinder.mainactivity}: java.lang.runtimeexception: content must have listview id attribute 'android.r.id.list'

even though have android:id="@android:id/list" <listview\> element.

can tell me i'm missing here?

your listview id = "@android:id/list" must part of activity, not fragment. in code list view part of fragment. can utilize mutual activity instead of listactivity , listfragment (as parent of placeholderfragment class). or can move list fragment activity.

android listview android-listview runtime-error