Made fragments work properly.

As this was my first experience with fragments, I didn't respect
their lifecycle properly. I think this has solved the issue I was
having, where recreating the app list fragments after it was destroid
by Android caused them to stuff up.

src/org/fdroid/fdroid/FDroid.java

@@ -29,6 +29,7 @@ import android.app.*;
 import android.os.Build;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
+import android.support.v4.view.PagerAdapter;
 import android.support.v4.view.ViewPager;
 import android.view.*;
 import android.widget.*;
@@ -92,6 +93,7 @@ public class FDroid extends FragmentActivity implements OnItemClickListener,
 
     // Used by pre 3.0 devices which don't have an ActionBar...
     private TabHost tabHost;
+    private AppListFragmentPageAdapter viewPageAdapter;
 
     // The following getters
     // (availableAdapter/installedAdapter/canUpdateAdapter/categoriesAdapter)
@@ -149,8 +151,8 @@ public class FDroid extends FragmentActivity implements OnItemClickListener,
 
     @Override
     protected void onStart() {
-        super.onStart();
         populateLists();
+        super.onStart();
     }
 
     @Override
@@ -281,7 +283,8 @@ public class FDroid extends FragmentActivity implements OnItemClickListener,
 
     private void createViews() {
         viewPager = (ViewPager)findViewById(R.id.main_pager);
-        viewPager.setAdapter(new AppListFragmentPageAdapter(this));
+        viewPageAdapter = new AppListFragmentPageAdapter(this);
+        viewPager.setAdapter(viewPageAdapter);
         viewPager.setOnPageChangeListener( new ViewPager.SimpleOnPageChangeListener() {
             public void onPageSelected(int position) {
                 selectTab(position);
@@ -593,12 +596,14 @@ public class FDroid extends FragmentActivity implements OnItemClickListener,
     public void onItemClick(AdapterView<?> arg0, View arg1, final int arg2,
             long arg3) {
 
-        Fragment fragment = ((AppListFragmentPageAdapter)viewPager.getAdapter()).getItem(viewPager.getCurrentItem());
+        int currentItem = viewPager.getCurrentItem();
+        Fragment fragment = viewPageAdapter.getItem(currentItem);
 
         // The fragment.getView() returns a wrapper object which has the
         // actual view we're interested in inside:
         //   http://stackoverflow.com/a/13684505
-        AppListView view  = ((AppListView)((ViewGroup)fragment.getView()).getChildAt(0));
+        ViewGroup group = (ViewGroup)fragment.getView();
+        AppListView view  = (AppListView)group.getChildAt(0);
         final DB.App app = (DB.App)view.getAppList().   getAdapter().getItem(arg2);
 
         Intent intent = new Intent(this, AppDetails.class);

src/org/fdroid/fdroid/views/AppListFragmentPageAdapter.java

@@ -1,13 +1,18 @@
 package org.fdroid.fdroid.views;
 
 import android.os.Bundle;
+import android.os.Parcelable;
 import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentPagerAdapter;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import org.fdroid.fdroid.FDroid;
 import org.fdroid.fdroid.R;
+import org.fdroid.fdroid.views.fragments.AvailableAppsFragment;
+import org.fdroid.fdroid.views.fragments.CanUpdateAppsFragment;
+import org.fdroid.fdroid.views.fragments.InstalledAppsFragment;
 
 /**
  * Used by the FDroid activity in conjunction with its ViewPager to support
@@ -19,28 +24,11 @@ public class AppListFragmentPageAdapter extends FragmentPagerAdapter {
     private Fragment[] fragments = new Fragment[3];
 
     public AppListFragmentPageAdapter(FDroid parent) {
-
         super(parent.getSupportFragmentManager());
         this.parent  = parent;
-        final AppListViewFactory viewFactory = new AppListViewFactory(parent);
-
-        fragments[0] = new Fragment() {
-            public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
-                return viewFactory.createAvailableView();
-            }
-        };
-
-        fragments[1] = new Fragment() {
-            public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
-                return viewFactory.createInstalledView();
-            }
-        };
-
-        fragments[2] = new Fragment() {
-            public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
-                return viewFactory.createCanUpdateView();
-            }
-        };
+        fragments[0] = new AvailableAppsFragment();
+        fragments[1] = new InstalledAppsFragment();
+        fragments[2] = new CanUpdateAppsFragment();
     }
 
     @Override

src/org/fdroid/fdroid/views/AppListView.java

@@ -1,6 +1,7 @@
 package org.fdroid.fdroid.views;
 
 import android.content.Context;
+import android.util.AttributeSet;
 import android.widget.LinearLayout;
 import android.widget.ListView;
 
@@ -22,6 +23,14 @@ public class AppListView extends LinearLayout {
         super(context);
     }
 
+    public AppListView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public AppListView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
     public void setAppList(ListView appList) {
         this.appList = appList;
     }

src/org/fdroid/fdroid/views/fragments/AppListFragment.java

@@ -0,0 +1,14 @@
+package org.fdroid.fdroid.views.fragments;
+
+import android.support.v4.app.Fragment;
+import org.fdroid.fdroid.FDroid;
+import org.fdroid.fdroid.views.AppListViewFactory;
+
+public class AppListFragment extends Fragment {
+
+    protected AppListViewFactory getViewFactory() {
+        FDroid parent = (FDroid)getActivity();
+        return new AppListViewFactory(parent);
+    }
+
+}

src/org/fdroid/fdroid/views/fragments/AvailableAppsFragment.java

@@ -0,0 +1,14 @@
+package org.fdroid.fdroid.views.fragments;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+public class AvailableAppsFragment extends AppListFragment {
+
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        return getViewFactory().createAvailableView();
+    }
+
+}

src/org/fdroid/fdroid/views/fragments/CanUpdateAppsFragment.java

@@ -0,0 +1,14 @@
+package org.fdroid.fdroid.views.fragments;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+public class CanUpdateAppsFragment extends AppListFragment {
+
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        return getViewFactory().createCanUpdateView();
+    }
+
+}

src/org/fdroid/fdroid/views/fragments/InstalledAppsFragment.java

@@ -0,0 +1,14 @@
+package org.fdroid.fdroid.views.fragments;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+public class InstalledAppsFragment extends AppListFragment {
+
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        return getViewFactory().createInstalledView();
+    }
+
+}