Latest Contributions by AmelieBernier

I have an application that uses ActionBarSherlock and Tab navigation with the Android compatibility library. I have 4 fragments that are attached or detached with FragmentTransaction depending on the selected tab. One of the fragment should display a MapView, but I cannot seem to make it work.  Do you have examples of using a MapView within a fragment, or any tips for implementing this?  Here is my code. One of the things I tried is to simply retrieve the MapView from the XML Layout, but the app just crashes at startup. import com.actionbarsherlock.app.ActionBar; import com.actionbarsherlock.app.ActionBar.Tab; import com.actionbarsherlock.app.SherlockFragmentActivity; import android.os.Bundle;  import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; public class ActionBarTabsActivity extends SherlockFragmentActivity {     @Override public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);     ActionBar actionBar = getSupportActionBar();    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);         String label1 = getResources().getString(R.string.mapTabLabel);    Tab tab = actionBar.newTab();    tab.setText(label1);    TabListener<MapFragment> tl = new TabListener<MapFragment>(this,      label1, MapFragment.class);    tab.setTabListener(tl);      actionBar.addTab(tab);     String label2 = getResources().getString(R.string.listTabLabel);    tab = actionBar.newTab();    tab.setText(label2);    TabListener<ParkListFragment> tl2 = new TabListener<ParkListFragment>(this,      label2, ParkListFragment.class);    tab.setTabListener(tl2);    actionBar.addTab(tab);      String label3 = getResources().getString(R.string.filtersTabLabel);    tab = actionBar.newTab();    tab.setText(label3);    TabListener<FilterListFragment> tl3 = new TabListener<FilterListFragment>(this,      label3, FilterListFragment.class);    tab.setTabListener(tl3);    actionBar.addTab(tab);     String label4 = getResources().getString(R.string.aboutTabLabel);    tab = actionBar.newTab();    tab.setText(label4);    TabListener<AboutFragment> tl4 = new TabListener<AboutFragment>(this,      label4, AboutFragment.class);    tab.setTabListener(tl4);    actionBar.addTab(tab);     // Restore the current activated tab index   if (savedInstanceState != null)   {            actionBar.setSelectedNavigationItem(savedInstanceState.getInt("tab_index", 0));       }   }  private class TabListener<T extends Fragment> implements ActionBar.TabListener {      private Fragment mFragment;    private final SherlockFragmentActivity mActivity;    private final String mTag;    private final Class<T> mClass;    /**     * Constructor used each time a new tab is created.     *     * @param activity     *            The host Activity, used to instantiate the fragment     * @param tag     *            The identifier tag for the fragment     * @param clz     *            The fragment's Class, used to instantiate the fragment     */   public TabListener(SherlockFragmentActivity activity, String tag, Class<T> clz) {        mActivity = activity;     mTag = tag;     mClass = clz;    }    public void onTabSelected(Tab tab, FragmentTransaction ft) {        mFragment = mActivity.getSupportFragmentManager().findFragmentByTag(mTag);    // Check if the fragment is already initialized     if (mFragment == null) {      // If not, instantiate and add it to the activity      mFragment = Fragment.instantiate(mActivity, mClass.getName());      ft.add(android.R.id.content, mFragment, mTag);     } else {      // If it exists, simply attach it in order to show it      ft.attach(mFragment);     }    }    public void onTabUnselected(Tab tab, FragmentTransaction ft) {     if (mFragment != null) {      // Detach the fragment, because another one is being attached      ft.detach(mFragment);     }    }    public void onTabReselected(Tab tab, FragmentTransaction ft) {     // User selected the already selected tab. Usually do nothing.    }  } @Override protected void onSaveInstanceState(Bundle outState) {       super.onSaveInstanceState(outState);   // Save the current activated tab index   outState.putInt("tab_index", getSupportActionBar().getSelectedNavigationIndex());   } } import com.esri.android.map.MapView; import com.esri.android.map.ags.ArcGISTiledMapServiceLayer; import android.os.Bundle;  import android.support.v4.app.Fragment; import android.view.LayoutInflater;  import android.view.View;  import android.view.ViewGroup;  import android.widget.LinearLayout;  public class MapFragment extends Fragment {  MapView map; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container,    Bundle savedInstanceState) {      super.onCreate(savedInstanceState);     View layout = inflater.inflate(R.layout.map_test, container, false);         // Retrieve the map and initial extent from XML layout   map = (MapView) layout.findViewById(R.id.map_view);   // Add dynamic layer to MapView   map.addLayer(new ArcGISTiledMapServiceLayer(    "http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer"));     return (LinearLayout) layout;  }  } [HTML]<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/map_layout" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical">    <!-- MapView layout and initial extent --> <com.esri.android.map.MapView xmlns:android="http://schemas.android.com/apk/res/android"   android:id="@+id/map_view"   initExtent="490969 5452639 508730 5473334"    android:layout_width="fill_parent"   android:layout_height="fill_parent"> </com.esri.android.map.MapView> </LinearLayout> [/HTML] ... 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