Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'

Question

I have a problem:

Java Code

public class VisualizzaListaActivity extends TabActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    TabHost tabHost = getTabHost();  // The activity TabHost
    TabHost.TabSpec spec;  // Reusable TabSpec for each tab
    Intent intent;  // Reusable Intent for each tab

    // Create an Intent to launch an Activity for the tab (to be reused)
    intent = new Intent().setClass(this, DaAcquistareActivity.class);

    // Initialize a TabSpec for each tab and add it to the TabHost
    spec = tabHost.newTabSpec("daAcquistare").setIndicator("Da Acquistare").setContent(intent);
    tabHost.addTab(spec);

    // Do the same for the other tabs
    intent = new Intent().setClass(this, AcquistatiActivity.class);
    spec = tabHost.newTabSpec("acquistati").setIndicator("Acquistati").setContent(intent);
    tabHost.addTab(spec);

    tabHost.setCurrentTab(0);
}

}

XML code

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"   <-------------- It's tabhost -.-"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<LinearLayout
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:padding="5dp">
    <TabWidget
       android:id="@android:id/tabs"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content" />
    <FrameLayout
       android:id="@android:id/tabcontent"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       android:padding="5dp" />
</LinearLayout>
</TabHost>

And LogCat

12-16 15:26:22.519: E/AndroidRuntime(8262): java.lang.RuntimeException: Unable to start activity ComponentInfo{android.smile.matteo.spesaPRO/android.smile.matteo.spesaPRO.VisualizzaListaActivity}: java.lang.RuntimeException: Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'             
12-16 15:26:22.519: E/AndroidRuntime(8262): Caused by: java.lang.RuntimeException: Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'
12-16 15:26:22.519: E/AndroidRuntime(8262):         at android.smile.matteo.spesaPRO.VisualizzaListaActivity.onCreate(VisualizzaListaActivity.java:13)

Problem

Someone can tell me why it's says

Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'

when the android:id = @android:id/tabhost?

Obtuse

Have you tried rebuilding the whole project? Sometimes eclipse is a bit buggy in those situations – Mae

try deleting your R file and rebuilding. – Matrimony

I tried to clean the project, restart it, and delete R but nothing. I have tried to use this code in another application and it's started but in this dont run – Obtuse

Do you have multiple layout folders? If so, check that every xml layout file have the attribute. – Sonja

@LadaRaider Your comment solved my problem! My project uses a library, both had main.xml in layout, and so I got the missing tabhost error. Deleted the main.xml I didn't need and the problem is fixed, thanks :) – Cither

Answer 1

Try cleaning your build from the Project > Clean... menu if you are using Eclipse. Sounds simple but often fixes this problem.

Janicejanicki

Is your xml file named main.xml? – Janicejanicki

Change setContentView(R.layout.main); to setContentView(R.layout.visualizzaliste); but I guess you got that! – Janicejanicki

i'm a very big idiot !!! Thanks very much !!! i have concentrated my a attention on the xml file and i don't have see this... Thank you very much yet – Obtuse

Answer 2

I believe the message means this:

     <TabHost android:id="@+id/tabhost"

should be changed to:

     <TabHost android:id="@android:id/tabhost"

Breadboard

I had to use: android:id="@android:id/tabhost" without the * – Wristwatch

Answer 3

Only thing you need to change is android:id attribute in layout xml , It should be " android:id="@android:id/tabhost" "

Teakettle

Answer 4

I had the same problem. Actually I extended TabActivity for DaAcquistareActivity class. This was the reason. I solved the problem by extending DaAcquistareActivity with Activity and not with TabActivity.

Wallywalnut

Answer 5

Solution. If you're switching to a new Activity check it extends, perhaps on reflex copied from the primary, and there is a TabActivity, but we need Activity or other activity.

Beene