TabHost not loading properly?

Question

I am having a problem with my TabHost activity not loading correctly due to an error. Here's my code, xml, and error logs:

public class TabScreen extends TabActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_tab_screen);

    TabHost t = getTabHost();
    TabHost tabHost = (TabHost)findViewById(android.R.id.tabhost);


    //For New Photos
    TabSpec newSpec = tabHost.newTabSpec("NewPhoto");
    newSpec.setIndicator("NewPhoto", getResources().getDrawable(R.drawable.ic_tab_newphoto));
    Intent phNewIntent = new Intent(this, NewPhoto.class);
    newSpec.setContent(phNewIntent);
    //For List of Taken Photos
    TabSpec listSpec = tabHost.newTabSpec("PhotoList");
    listSpec.setIndicator("PhotoList", getResources().getDrawable(R.drawable.ic_tab_photolist));
    Intent phListIntent = new Intent(this, PhotoList.class);
    listSpec.setContent(phListIntent);
    //For Map
    TabSpec mapSpec = tabHost.newTabSpec("PhotoMap");
    mapSpec.setIndicator("PhotoMap", getResources().getDrawable(R.drawable.ic_tab_photomap));
    Intent phMapIntent = new Intent(this, PhotoMap.class);
    mapSpec.setContent(phMapIntent);

    tabHost.addTab(newSpec);
    tabHost.addTab(listSpec);
    tabHost.addTab(mapSpec);
}


}

And my XML:

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/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">

    <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"/>

</LinearLayout>

and finally, my error messages:(There was a long list, but the main one I believe to be the problem is what I'm pasting)

12-02 16:00:06.250: E/AndroidRuntime(3757): FATAL EXCEPTION: main
12-02 16:00:06.250: E/AndroidRuntime(3757): java.lang.RuntimeException: Unable to start         activity ComponentInfo{edu.wcu.snipsnaps/edu.wcu.snipsnaps.TabScreen}:     java.lang.RuntimeException: Unable to start activity     ComponentInfo{edu.wcu.snipsnaps/edu.wcu.snipsnaps.NewPhoto}: java.lang.RuntimeException:     Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'

There are multiple entries on this website about this problem, but after looking at every one, none of the solutions worked. My xml has the proper @android:id/tabhost, and I deleted my R.java file and cleaned the entire project numerous times. If this helps, when I was doing some debugging, the place where the application fell apart was at the tabHost.addTab(newSpec); . Anyone know what's going on?

EDIT: Full error log:

12-02 17:02:43.296: E/AndroidRuntime(8121): java.lang.RuntimeException: Unable to start activity ComponentInfo{edu.wcu.snipsnaps/edu.wcu.snipsnaps.TabScreen}:     java.lang.RuntimeException: Your content must have a TabHost whose id attribute is     'android.R.id.tabhost'
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.os.Looper.loop(Looper.java:130)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.app.ActivityThread.main(ActivityThread.java:3687)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at java.lang.reflect.Method.invokeNative(Native Method)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at java.lang.reflect.Method.invoke(Method.java:507)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at dalvik.system.NativeStart.main(Native Method)
12-02 17:02:43.296: E/AndroidRuntime(8121): Caused by: java.lang.RuntimeException: Your content must have a TabHost whose id attribute is 'android.R.id.tabhost'
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.app.TabActivity.onContentChanged(TabActivity.java:105)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:212)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.app.Activity.setContentView(Activity.java:1657)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at edu.wcu.snipsnaps.TabScreen.onCreate(TabScreen.java:16)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-02 17:02:43.296: E/AndroidRuntime(8121):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
12-02 17:02:43.296: E/AndroidRuntime(8121):     ... 11 more

Answer 1

I figured it out - -

I wasn't properly extending TabActivity in all of my classes to be displayed in the tab.

Thanks for the help!!

Answer 2

Try this in code

TabHost tabHost = (TabHost)findViewById(R.id.tabhost);

Instead of :

TabHost tabHost = (TabHost)findViewById(android.R.id.tabhost);

In XML:

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

Instead of

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

Also May be you need to change all ids in views from android:id="@android:id...." to like android:id="@+id/....." , @android is reserved for androids default elements

Link for help http://www.androidhive.info/2011/08/android-tab-layout-tutorial/