[and] Back navigation in browser.

android/src/com/example/travelguide/ArticleInfoDetailActivity.java

@@ -18,6 +18,8 @@ import android.view.MenuItem;
 public class ArticleInfoDetailActivity extends FragmentActivity
 {
 
+  private ArticleInfoDetailFragment mArticleInfoDetailFragment;
+
   @Override
   protected void onCreate(Bundle savedInstanceState)
   {
@@ -44,9 +46,12 @@ public class ArticleInfoDetailActivity extends FragmentActivity
       arguments.putSerializable(ArticleInfoDetailFragment.ARTICLE_INFO,
           getIntent().getSerializableExtra(ArticleInfoDetailFragment.ARTICLE_INFO));
 
-      ArticleInfoDetailFragment fragment = new ArticleInfoDetailFragment();
-      fragment.setArguments(arguments);
-      getSupportFragmentManager().beginTransaction().add(R.id.articleinfo_detail_container, fragment).commit();
+      mArticleInfoDetailFragment = new ArticleInfoDetailFragment();
+      mArticleInfoDetailFragment.setArguments(arguments);
+      getSupportFragmentManager()
+        .beginTransaction()
+        .add(R.id.articleinfo_detail_container, mArticleInfoDetailFragment)
+        .commit();
     }
   }
 
@@ -68,4 +73,13 @@ public class ArticleInfoDetailActivity extends FragmentActivity
     }
     return super.onOptionsItemSelected(item);
   }
+
+  @Override
+  public void onBackPressed()
+  {
+    if (mArticleInfoDetailFragment.canGoBack())
+      mArticleInfoDetailFragment.goBack();
+    else
+      super.onBackPressed();
+  }
 }

android/src/com/example/travelguide/ArticleInfoDetailFragment.java

@@ -134,4 +134,14 @@ public class ArticleInfoDetailFragment extends Fragment implements OnClickListen
     mIconClickedListener = listener;
   }
 
+  public boolean canGoBack()
+  {
+    return mWebView.canGoBack();
+  }
+
+  public void goBack()
+  {
+    mWebView.goBack();
+  }
+
 }

android/src/com/example/travelguide/ArticleInfoListActivity.java

@@ -106,4 +106,13 @@ public class ArticleInfoListActivity extends FragmentActivity implements Article
   {
     mArtInfoDetailFragment.setArticleInfo(info);
   }
+
+  @Override
+  public void onBackPressed()
+  {
+    if (mTwoPane && mArtInfoDetailFragment.canGoBack())
+      mArtInfoDetailFragment.goBack();
+    else
+      super.onBackPressed();
+  }
 }