title: Null pointer exception in TabhostcontentFactory
body: <p><strong>I am not able to execute the given code in emulator and it crashes giving the error as shown in the log below.Here is my activity</strong></p>
  
  <pre><code>import android.app.TabActivity;
  import android.content.Context;
  import android.os.Bundle;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.widget.TabHost;
  import android.widget.TabHost.TabContentFactory;
  import android.widget.TabHost.TabSpec;
  import android.widget.TextView;
  
  @SuppressWarnings("deprecation")
  public class Second extends TabActivity {
      private TabHost mTabHost;
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.second);
              mTabHost = (TabHost) findViewById(android.R.id.tabhost);
              setupTab(new TextView(this), "SRK/T");
              setupTab(new TextView(this), "SRK II");
              setupTab(new TextView(this), "HOLLADAY");
              setupTab(new TextView(this), "BINKHORST");
          }
          private void setupTab(final View view, final String tag) {
              View tabview = createTabView(mTabHost.getContext(), tag);
                  TabSpec setContent = mTabHost.newTabSpec(tag).setIndicator(tabview).setContent(new TabContentFactory() {
  
                      public View createTabContent(String tag) {
                          // TODO Auto-generated method stub
                          return null;
                      }
                  });
              mTabHost.addTab(setContent);
          }
  
          private static View createTabView(final Context context, final String text) {
              View view = LayoutInflater.from(context).inflate(R.layout.tabs_bg, null);
              TextView tv = (TextView) view.findViewById(R.id.tabsText);
              tv.setText(text);
              return view;
          }
  
  }
  </code></pre>
  
  <hr>
  
  <p><strong>LOG FILE</strong></p>
  
  <pre><code>    01-30 16:53:07.266: E/AndroidRuntime(382): FATAL EXCEPTION: main
  01-30 16:53:07.266: E/AndroidRuntime(382): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.iolcalci/com.example.iolcalci.Second}: java.lang.NullPointerException
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.os.Handler.dispatchMessage(Handler.java:99)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.os.Looper.loop(Looper.java:123)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.app.ActivityThread.main(ActivityThread.java:3683)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at java.lang.reflect.Method.invokeNative(Native Method)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at java.lang.reflect.Method.invoke(Method.java:507)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at dalvik.system.NativeStart.main(Native Method)
  01-30 16:53:07.266: E/AndroidRuntime(382): Caused by: java.lang.NullPointerException
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.widget.TabHost$FactoryContentStrategy.getContentView(TabHost.java:625)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.widget.TabHost.setCurrentTab(TabHost.java:326)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.widget.TabHost.addTab(TabHost.java:216)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at com.example.iolcalci.Second.setupTab(Second.java:35)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at com.example.iolcalci.Second.onCreate(Second.java:21)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
  01-30 16:53:07.266: E/AndroidRuntime(382):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
  01-30 16:53:07.266: E/AndroidRuntime(382):  ... 11 more
  01-30 16:53:09.026: E/InputDispatcher(60): channel '40730f58 com.example.iolcalci/com.example.iolcalci.MainActivity (server)' ~ Consumer closed input channel or an error occurred.  events=0x8
  01-30 16:53:09.026: E/InputDispatcher(60): channel '40730f58 com.example.iolcalci/com.example.iolcalci.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
  </code></pre>
  
  <hr>
  
  <p><strong>I am not able to find the problem. Beginner here please help me</strong></p>