I'm having a problem using TabHost in a new intent like TabActivity, which I hope you can point me in the right direction. Funny it works fine when I try to view it in its original intent: setContentView (R.layout.main)
I get a "forced close" and inside logcat, I get the following error, although my Tabhost id = "@android: id / tabhost":
02-18 22: 23: 11.937: ERROR / AndroidRuntime (5944): caused by: java.lang.RuntimeException: your content must have TabHost, whose identifier attribute is "android.R.id.tabhost"
I declared the second intention in the Manifest.xml: XML file:
<activity android:name=".NextActivity" android:label="@string/app_name" >
As part of the first activity (MainActivity), I launch the second intention (NextActivity) with additional features:
Intent nextActivity = new Intent(MainActivity.this,NextActivity.class);
Bundle b_next=new Bundle();
b_next.putString("s_string", myString);
nextActivity.putExtras(b_next);
In my NextActivity.java file, I get additional functions and try to display the TabHost View:
public class NextActivity extends TabActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String myString;
Bundle b_initial;
b_initial = getIntent().getExtras();
myString = b_initial.getString("s_string");
setContentView(R.layout.main);
}
}
I get the same error using the TabHost example on the Android developer site (Hellow View):
Main.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">
<TextView
android:id="@+id/textview1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="this is a tab" />
<TextView
android:id="@+id/textview2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="this is another tab" />
<TextView
android:id="@+id/textview3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="this is a third tab" />
</FrameLayout>
</LinearLayout>
</TabHost>
Thanks in advance guys ...
UPDATE: This is what I really get from LogCat:
java.lang.NullPointerException
android.widget.TabHost.dispatchWindowFocusChanged(TabHost.java 285) android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java 640) android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java 640) android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java 640) android.view.ViewRoot.handleMessage(ViewRoot.java 1645) android.os.Handler.dispatchMessage(Handler.java 99) android.os.Looper.loop(Looper.java 123) android.app.ActivityThread.main(ActivityThread.java 3948) java.lang.reflect.Method.invokeNative( )
java.lang.reflect.Method.invoke(Method.java 521) at com.android.internal.os.ZygoteInit $MethodAndArgsCaller.run(ZygoteInit.java 782) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java 540) dalvik.system.NativeStart.main( )