Question

I keep getting this error on emulator:

I copied this from a tutorial and still won’t work. When I run my app it says – Unfortunately, lastRide has stopped. Any Ideas?

No errors are given in the console though.

main.xml

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

   <LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TabWidget
        android:id="@android:id/tabs"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <LinearLayout
        android:id="@+id/fr"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <CheckBox android:text="rawted" />

        <CheckBox android:text="rawted" />

        <CheckBox android:text="rawted" />

         <CheckBox android:text="rawted" />
          </LinearLayout>

         </LinearLayout>

       </TabHost>

lastRideActivity.java

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    TabHost mTabHost = getTabHost();
    mTabHost.addTab(mTabHost.newTabSpec("tab_test1").setIndicator("TAB 1")
            .setContent(R.id.fr));

}

Answer 1

You need to move setContentView so that it occurs before you call for the tabhost.

When you use getTabHostthe framework is trying to find the widget in the active view, but can’t because no view has been set yet.