title: add multiple fragments programmatically
body: <p>short info about project:  </p>
  
  <ul>
  <li>minSDK = 8</li>
  <li>import android.support.v4</li>
  </ul>
  
  <p>Part of class code:</p>
  
  <pre><code>public class DetailsActivity extends FragmentActivity implements ToplineTrigger {
  
  static Context mContext;
  
  private static FragmentManager fm;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.details);
      if (mContext == null)
          mContext = Pleazzme.getAppContext();
  
      DetailsTitleFragment title = new DetailsTitleFragment();
      DocumentDescriptionWeb description = new DocumentDescriptionWeb();
      getSupportFragmentManager()
              .beginTransaction()
              .add(R.id.detailstitlefragment_wrap, title, "DetailsTitle")
              .add(R.id.documentdescriptionweb_wrap, description, "WebDescription")
              .commit();
  
      ((Topline) fm.findFragmentByTag("Topline")).setDetailsMode();
  };
  </code></pre>
  
  <p>Xml view:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/details_contentwrapper"
  android:layout_width="wrap_content"
  android:layout_height="match_parent"
  android:orientation="vertical" &gt;
  
  &lt;fragment
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      class="com.mtechnologia.pleazzme.Topline"
      android:tag="Topline" /&gt;
  
  &lt;FrameLayout
      android:id="@+id/detailstitlefragment_wrap"
      android:layout_width="match_parent"
      android:layout_height="wrap_content" &gt;
  &lt;/FrameLayout&gt;
  
  &lt;FrameLayout
      android:id="@+id/documentdescriptionweb_wrap"
      android:layout_width="match_parent"
      android:layout_height="wrap_content" &gt;
  &lt;/FrameLayout&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>classes declaration:  </p>
  
  <pre><code>public class DetailsTitleFragment extends ListFragment{...}
  
  public class DocumentDescriptionWeb extends Fragment {
  
  WebView mWebView = null;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
  }
  
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
          Bundle savedInstanceState) {
      return inflater.inflate(R.layout.simplewebview, container);
  }
  
  @Override
  public void onViewCreated(View view, Bundle savedInstanceState) {
      super.onViewCreated(view, savedInstanceState);
      mWebView = (WebView) view.findViewById(R.id.simplewebview);
      mWebView.getSettings().setJavaScriptEnabled(false);
      mWebView.getSettings().setSupportZoom(false);
  
      String data = "asdasdasd";
      mWebView.loadData(data, "text/html", "utf-8");
  }
  
  }  
  </code></pre>
  
  <p>after code runs i get error:</p>
  
  <pre><code>08-15 19:11:08.003: E/AndroidRuntime(24708): FATAL EXCEPTION: main
  08-15 19:11:08.003: E/AndroidRuntime(24708): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mtechnologia.pleazzme/com.mtechnologia.pleazzme.DetailsActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.os.Handler.dispatchMessage(Handler.java:99)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.os.Looper.loop(Looper.java:137)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.app.ActivityThread.main(ActivityThread.java:4511)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at java.lang.reflect.Method.invokeNative(Native Method)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at java.lang.reflect.Method.invoke(Method.java:511)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at dalvik.system.NativeStart.main(Native Method)
  08-15 19:11:08.003: E/AndroidRuntime(24708): Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.view.ViewGroup.addViewInner(ViewGroup.java:3342)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.view.ViewGroup.addView(ViewGroup.java:3213)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.view.ViewGroup.addView(ViewGroup.java:3170)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.view.ViewGroup.addView(ViewGroup.java:3150)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.support.v4.app.NoSaveStateFrameLayout.wrap(NoSaveStateFrameLayout.java:40)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:875)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1083)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:635)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1431)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:523)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1136)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.app.Activity.performStart(Activity.java:4480)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1940)
  08-15 19:11:08.003: E/AndroidRuntime(24708):    ... 11 more  
  </code></pre>
  
  <p>can someone tell me, what i doing wrong?<br>
  i know, that i can declare both fragments in XML, but i need add this fragments programmatically, to replace them when i need this.
  Thanks in advance for your help</p>