title: Displaying progress bar for a webview in fragment view
body: <p>I am trying to display a progress bar before the webpage appears or loads.I have declared the progressbar in onCreateView method of PlanetFragment which extends fragment I have removed the hearder of the webpage. But the progressbar doesn't appear whatsoever code I write. Please help</p>
  
  <p>This is my MainActivity</p>
  
  <pre><code>public class MainActivity extends Activity {
  
  private DrawerLayout mDrawerLayout;
  private ListView mDrawerList;
  private ActionBarDrawerToggle mDrawerToggle;
  
  private CharSequence mDrawerTitle;
  private CharSequence mTitle;
  private String[] mPlanetTitles;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
  
      mTitle = mDrawerTitle = getTitle();
      mPlanetTitles = getResources().getStringArray(R.array.planets_array);
      mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
      mDrawerList = (ListView) findViewById(R.id.left_drawer);
  
      // set a custom shadow that overlays the main content when the drawer
      // opens
      mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
              GravityCompat.START);
      // set up the drawer's list view with items and click listener
      mDrawerList.setAdapter(new ArrayAdapter&lt;String&gt;(this,
              R.layout.drawer_list_item, mPlanetTitles));
      mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
  
      // enable ActionBar app icon to behave as action to toggle nav drawer
      getActionBar().setDisplayHomeAsUpEnabled(true);
      getActionBar().setHomeButtonEnabled(true);
  
      // ActionBarDrawerToggle ties together the the proper interactions
      // between the sliding drawer and the action bar app icon
      mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
      mDrawerLayout, /* DrawerLayout object */
      R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
      R.string.drawer_open, /* "open drawer" description for accessibility */
      R.string.drawer_close /* "close drawer" description for accessibility */
      ) {
          public void onDrawerClosed(View view) {
              getActionBar().setTitle(mTitle);
              invalidateOptionsMenu(); // creates call to
                                          // onPrepareOptionsMenu()
          }
  
          public void onDrawerOpened(View drawerView) {
              getActionBar().setTitle(mDrawerTitle);
              invalidateOptionsMenu(); // creates call to
                                          // onPrepareOptionsMenu()
          }
      };
      mDrawerLayout.setDrawerListener(mDrawerToggle);
  
      if (savedInstanceState == null) {
          selectItem(0);
      }
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.main, menu);
      return super.onCreateOptionsMenu(menu);
  }
  
  /* Called whenever we call invalidateOptionsMenu() */
  @Override
  public boolean onPrepareOptionsMenu(Menu menu) {
      // If the nav drawer is open, hide action items related to the content
      // view
      boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
      menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
      return super.onPrepareOptionsMenu(menu);
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
      // The action bar home/up action should open or close the drawer.
      // ActionBarDrawerToggle will take care of this.
      if (mDrawerToggle.onOptionsItemSelected(item)) {
          return true;
      }
      // Handle action buttons
      switch (item.getItemId()) {
      case R.id.action_websearch:
          // create intent to perform web search for this planet
          Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
          intent.putExtra(SearchManager.QUERY, getActionBar().getTitle());
          // catch event that there's no activity to handle intent
          if (intent.resolveActivity(getPackageManager()) != null) {
              startActivity(intent);
          } else {
              Toast.makeText(this, R.string.app_not_available,
                      Toast.LENGTH_LONG).show();
          }
          return true;
      default:
          return super.onOptionsItemSelected(item);
      }
  }
  
  /* The click listner for ListView in the navigation drawer */
  private class DrawerItemClickListener implements
          ListView.OnItemClickListener {
      @Override
      public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position,
              long id) {
          selectItem(position);
      }
  }
  
  private void selectItem(int position) {
      // update the main content by replacing fragments
      Fragment fragment = new PlanetFragment();
      Bundle args = new Bundle();
      args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
      fragment.setArguments(args);
  
      FragmentManager fragmentManager = getFragmentManager();
      fragmentManager.beginTransaction()
              .replace(R.id.content_frame, fragment).commit();
  
      // update selected item and title, then close the drawer
      mDrawerList.setItemChecked(position, true);
      setTitle(mPlanetTitles[position]);
      mDrawerLayout.closeDrawer(mDrawerList);
  }
  
  @Override
  public void setTitle(CharSequence title) {
      mTitle = title;
      getActionBar().setTitle(mTitle);
  }
  
  /**
   * When using the ActionBarDrawerToggle, you must call it during
   * onPostCreate() and onConfigurationChanged()...
   */
  
  @Override
  protected void onPostCreate(Bundle savedInstanceState) {
      super.onPostCreate(savedInstanceState);
      // Sync the toggle state after onRestoreInstanceState has occurred.
      mDrawerToggle.syncState();
  }
  
  @Override
  public void onConfigurationChanged(Configuration newConfig) {
      super.onConfigurationChanged(newConfig);
      // Pass any configuration change to the drawer toggls
      mDrawerToggle.onConfigurationChanged(newConfig);
  }
  
  /**
   * Fragment that appears in the "content_frame", shows a planet
   */
  public static class PlanetFragment extends Fragment {
      public static final String ARG_PLANET_NUMBER = "planet_number";
  
      public PlanetFragment() {
          // Empty constructor required for fragment subclasses
      }
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
              Bundle savedInstanceState) {
          View rootView = inflater.inflate(R.layout.fragment_planet,
                  container, false);
          int i = getArguments().getInt(ARG_PLANET_NUMBER);
          String planet = getResources()
                  .getStringArray(R.array.planets_array)[i];
  
          int imageId = getResources().getIdentifier(
                  planet.toLowerCase(Locale.getDefault()), "drawable",
                  getActivity().getPackageName());
  
          final WebView webview = ((WebView) rootView
                  .findViewById(R.id.image));
  
          final ProgressBar progressbar = ((ProgressBar) rootView
                  .findViewById(R.id.progressbar));
  
  
  
  
  
          webview.getSettings().setJavaScriptEnabled(true);
          final PlanetFragment activity = this;
  
  
          webview.setWebViewClient(new WebViewClient() {
              @Override
              public void onPageFinished(WebView view, String url) {
  
                  webview.loadUrl("javascript:document.getElementsByClassName('header')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('icon-anon')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('search')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('wh_ad')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('cse_x')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('wh_search')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('wh_ad')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('wh_ad')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('footer_random_button')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('mw-mf-page-left')[0].style.display=\"none\";");
                  webview.loadUrl("javascript:document.getElementsByClassName('mw-mf-viewport')[0].style.display=\"none\";");
  
                  webview.getSettings().setJavaScriptEnabled(false);
  
              }
          });
  
          webview.loadUrl(planet);
          getActivity().setTitle(planet);
          return rootView;
      }
  }
  </code></pre>
  
  <p>}</p>
  
  <p>This is my xml layout: </p>
  
  <pre><code>&lt;RelativeLayout 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"
  tools:context=".MainActivity" &gt;
  
  &lt;ProgressBar
      android:id="@+id/progressbar"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginRight="5dp" /&gt;
  
  &lt;WebView
      android:id="@+id/image"
      android:layout_width="wrap_content"
      android:layout_height="match_parent" /&gt;
  </code></pre>
  
  <p></p>