title: Fragments inside LinearLayout - Android
body: <p>I'm new with fragments and I try to use these.
  My xml from activity is:</p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/container"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".Loguin"
  tools:ignore="MergeRootFrame"&gt;
  
      &lt;Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Fragment Test"
      android:id="@+id/btn_FragmentTest"
      android:layout_gravity="center_horizontal"
      android:layout_marginTop="20dp"
      android:layout_marginBottom="0dp" /&gt;
  
      &lt;LinearLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="horizontal"
      android:id="@+id/frgContainer"
      android:layout_marginTop="20dp"&gt;
  
      &lt;fragment
          android:id="@+id/frgLoguin"
          android:layout_marginTop="20dp"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:name="habitatprojects.hubbuildings.Loguin$PlaceholderFragment"
          tools:layout="@layout/fragment_loguin" /&gt;
  
      &lt;/LinearLayout&gt;
  
  
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>And I want to change the fragment inside of LinearLayout, my class of mainActivity is:</p>
  
  <pre><code>public class Loguin extends Activity {
  
  private int num = 0;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_loguin);
      if (savedInstanceState == null) {
          getFragmentManager().beginTransaction()
                  .add(R.id.container, new PlaceholderFragment())
                  .commit();
      }
  
      Button btnBoton1 = (Button)findViewById(R.id.btn_FragmentTest);
  
      btnBoton1.setOnClickListener(new View.OnClickListener() {
          public void onClick(View arg0)
          {
              FragmentManager fragmentManager = getFragmentManager();
              FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
  
              if(num==0)
              {
                  fragmentTransaction.replace(R.id.frgContainer, new PlaceholderFragment())
                          .commit();
  
                  num++;
              }
              else{
                  if(num==1)
                  {
                      fragmentTransaction.replace(R.id.frgContainer, new PlaceholderFragment2())
                              .commit();
  
                      num++;
                  }
                  else{
                      fragmentTransaction.replace(R.id.frgContainer, new PlaceholderFragment3())
                              .commit();
  
                      num = 0;
                  }
              }
          }
      });
   }
  </code></pre>
  
  <p>And my PlaceHolderFunctions are:</p>
  
  <pre><code>public static class PlaceholderFragment extends Fragment {
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
                               Bundle savedInstanceState) {
          return inflater.inflate(R.layout.fragment_loguin, container, false);
      }
  }
  
  public static class PlaceholderFragment2 extends Fragment {
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
                               Bundle savedInstanceState) {
          return  inflater.inflate(R.layout.fragment_blank, container, false);
      }
  }
  
  public static class PlaceholderFragment3 extends Fragment {
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
                               Bundle savedInstanceState) {
          return inflater.inflate(R.layout.fragment_blank2, container, false);
      }
  }
  </code></pre>
  
  <p>Why doesn't work when I press the button? What do I doing bad? Srry for my english and thanks in advance!</p>
  
  <p>PD: If you need more code or info advise me, thanks!</p>
  
  <p>PD1: When I debug with my device the log cat just say me:</p>
  
  <blockquote>
    <p>11-18 11:33:30.775    6065-6065/habitatprojects.hubbuildings
    I/ViewRootImpl﹕ ViewRoot's Touch Event : Touch Down 11-18 11:33:30.835
    6065-6065/habitatprojects.hubbuildings I/ViewRootImpl﹕ ViewRoot's
    Touch Event : Touch UP</p>
  </blockquote>