title: Get id of TextView in Fragment from FragmentActivity in ViewPager
body: <p>I'm working with <code>ViewPager</code> with 3 <code>Fragments</code> and I want to change text of <code>TextView</code> in third page.</p>
  
  <p>In that page I have a <code>Button</code>that when its pressed, go to SD images to select one. When done, returns to page and want to update <code>TextView</code> with path of that image. The problem is that when I try to access that <code>TextView</code>from <code>FragmentActivity</code>it is null.</p>
  
  <p><strong>Here is my code</strong></p>
  
  <p><strong>SherlockFragmentActivity:</strong></p>
  
  <pre><code>public class TabsFacturasActivity extends SherlockFragmentActivity {
  
      protected MyApplication myApplication;
      private static final int FILE_SELECT_CODE = 0;
  
      private MyAdapter mAdapter;
      private ViewPager mPager;
      private PageIndicator mIndicator;
      private TextView textViewImg;
  
      private int lecturas = 0;
      private SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy"); 
      private boolean adjunto = false;
      private String filePath;
      private boolean esLecturaAT = false;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.fragment_pager);
  
          // Get the application instance
          myApplication = (MyApplication)getApplication();
  
          //Need to get that view
          textViewImg = (TextView) findViewById(R.id.textViewUrlImgLectura);
  
          //Creamos la lista
          LinkedList&lt;String&gt; direcciones = new LinkedList&lt;String&gt;();
          ArrayList&lt;TuplaCupsWS&gt; dirs = myApplication.getUsuarioActual().getCups();
          for(int dir = 0; dir &lt; myApplication.getUsuarioActual().getCups().size(); dir++) {
              direcciones.add(new String(dirs.get(dir).getDireccion()));
          }
  
          int tab = getIntent().getIntExtra("tab", 0);
  
          mAdapter = new MyAdapter(getSupportFragmentManager());
  
          mPager = (ViewPager)findViewById(R.id.pager);
          mPager.setAdapter(mAdapter);
          mPager.setCurrentItem(tab);
  
          mIndicator = (TitlePageIndicator)findViewById(R.id.indicator);
          mIndicator.setViewPager(mPager);
  
          getSupportActionBar().setDisplayShowTitleEnabled(false);
          getSupportActionBar().setIcon(R.drawable.logo_factorenergia_peque);
  
          /** Create an array adapter to populate dropdownlist */
          ArrayAdapter&lt;String&gt; adapter = new ArrayAdapter&lt;String&gt;(
                  getBaseContext(), android.R.layout.simple_spinner_dropdown_item, direcciones);
  
          /** Enabling dropdown list navigation for the action bar */
          getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
  
          /** Defining Navigation listener */
          OnNavigationListener navigationListener = new OnNavigationListener() {
  
              @Override
              public boolean onNavigationItemSelected(int itemPosition, long itemId) {
                  return false;
              }
          };
  
          /** Setting dropdown items and item navigation listener for the actionbar */
          getSupportActionBar().setListNavigationCallbacks(adapter, 
                  (com.actionbarsherlock.app.ActionBar.OnNavigationListener) 
                  navigationListener);
      }
  
      @Override
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
          switch (requestCode) {
              case FILE_SELECT_CODE:
              if (resultCode == RESULT_OK) {
                  adjunto = true;
                  // Get the Uri of the selected file 
                  Uri uri = data.getData();
                  // Get the path
                  String path = "";
                  try {
                      path = MyUtility.getPath(this, uri);
                  } catch (URISyntaxException e) {
                      myApplication.throwException(this);
                      e.printStackTrace();
                  }
                  String imgName = path.split("/")[path.split("/").length-1];
                  textViewImg.setText(imgName); //Here textViewImg is null
                  filePath = path;
              }
              break;
          }
          super.onActivityResult(requestCode, resultCode, data);
      }
  
      //Method executed when Button is pressed
      public void examinar(View view) {
          mostrarFileChooser();       
      }
  
      private void mostrarFileChooser() {     
          Intent intent = new Intent(Intent.ACTION_PICK);
          intent.setType("image/*");
  
          try {
              startActivityForResult(intent, FILE_SELECT_CODE);
          } catch (android.content.ActivityNotFoundException ex) {
          }
      }
  
      private static class MyAdapter extends FragmentPagerAdapter {
  
          private String[] titles = { "VER FACTURAS", "VER CONSUMO", "INTRODUCIR LECTURA" };
  
          public MyAdapter(FragmentManager fragmentManager) {
              super(fragmentManager);
          }
  
          @Override
          public CharSequence getPageTitle(int position) {
              return titles[position];
          }
  
          @Override
          public Fragment getItem(int position) {
              switch (position) {
              case 0: // Fragment # 0
                  return new FacturasActivity();
              case 1: // Fragment # 1
                  return new ConsumoActivity();
              case 2:// Fragment # 2
                  return new LecturaActivity();
              }
              //return new MyFragment();
              return null;
          }
  
          @Override
          public int getCount() {
              return titles.length;
          }
      }
  
  }
  </code></pre>
  
  <p><strong>fragment_pager.xml</strong></p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:orientation="vertical"
      tools:context=".TabsFacturasActivity" &gt;
  
      &lt;com.viewpagerindicator.TitlePageIndicator
          android:id="@+id/indicator"
          android:padding="10dip"
          android:layout_height="wrap_content"
          android:layout_width="fill_parent" /&gt;
  
      &lt;android.support.v4.view.ViewPager
          android:id="@+id/pager"
          android:layout_width="fill_parent"
          android:layout_height="0dp"
          android:layout_weight="1"
          android:background="#1184A4E8" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>