Rss feed application reworked

vogella · vogella · commit 78ed8c545966 · 2014-02-26T08:43:29.000+01:00
diff --git a/com.example.android.rssfeed/res/drawable-ldpi/ic_launcher.png b/com.example.android.rssfeed/res/drawable-ldpi/ic_launcher.png
diff --git a/com.example.android.rssfeed/res/drawable-mdpi/ic_launcher.png b/com.example.android.rssfeed/res/drawable-mdpi/ic_launcher.png
diff --git a/com.example.android.rssfeed/res/drawable-xhdpi/rssfeeds.png b/com.example.android.rssfeed/res/drawable-xhdpi/rssfeeds.png
diff --git a/com.example.android.rssfeed/res/drawable/rssfeeds.png b/com.example.android.rssfeed/res/drawable/rssfeeds.png
diff --git a/com.example.android.rssfeed/res/layout-port/activity_rssfeed.xml b/com.example.android.rssfeed/res/layout-port/activity_rssfeed.xml
@@ -8,7 +8,6 @@
         android:id="@+id/listFragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_marginTop="?android:attr/actionBarSize"
         class="com.example.android.rssfeed.MyListFragment" ></fragment>
 
 </LinearLayout> 
diff --git a/com.example.android.rssfeed/res/layout/activity_rssfeed.xml b/com.example.android.rssfeed/res/layout/activity_rssfeed.xml
@@ -9,7 +9,6 @@
         android:layout_width="0dp"
         android:layout_weight="1"
         android:layout_height="match_parent"
-        android:layout_marginTop="?android:attr/actionBarSize"
         class="com.example.android.rssfeed.MyListFragment" ></fragment>
     <fragment
         android:id="@+id/detailFragment"
diff --git a/com.example.android.rssfeed/res/layout/listview_rowlayout.xml b/com.example.android.rssfeed/res/layout/listview_rowlayout.xml
@@ -0,0 +1,39 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="?android:attr/listPreferredItemHeight"
+    android:padding="6dip" >
+
+    <ImageView
+        android:id="@+id/icon"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:layout_marginRight="6dip"
+        android:src="@drawable/rssfeeds" />
+
+    <LinearLayout
+        android:layout_width="0dip"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:orientation="vertical" >
+
+        <TextView
+            android:id="@+id/rsstitle"
+            android:layout_width="match_parent"
+            android:layout_height="0dip"
+            android:layout_weight="1"
+            android:ellipsize="marquee"
+            android:gravity="left"
+            android:singleLine="true"
+            android:text="RSS Title" />
+
+        <TextView
+            android:id="@+id/rssurl"
+            android:layout_width="match_parent"
+            android:layout_height="0dip"
+            android:layout_weight="1"
+            android:ellipsize="marquee"
+            android:singleLine="true"
+            android:text="RSS URL " />
+    </LinearLayout>
+
+</LinearLayout>
diff --git a/com.example.android.rssfeed/src/com/example/android/rssfeed/HeadlessFragment.java b/com.example.android.rssfeed/src/com/example/android/rssfeed/HeadlessFragment.java
@@ -0,0 +1,14 @@
+package com.example.android.rssfeed;
+
+import android.app.Fragment;
+import android.os.Bundle;
+
+public class HeadlessFragment extends Fragment {
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setRetainInstance(true);
+	}
+
+}
diff --git a/com.example.android.rssfeed/src/com/example/android/rssfeed/MyListFragment.java b/com.example.android.rssfeed/src/com/example/android/rssfeed/MyListFragment.java
@@ -29,8 +29,7 @@ public void onReceive(Context context, Intent intent) {
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		List<RssItem> list = RssApplication.list;
-		MyAdapter adapter = new MyAdapter(getActivity(),
-				android.R.layout.simple_list_item_1, list);
+		RssItemListAdapter adapter = new RssItemListAdapter(getActivity(), list);
 		setListAdapter(adapter);
 		// setRetainInstance(true);
 		
@@ -42,7 +41,6 @@ public void onResume() {
 		getActivity().registerReceiver(receiver,
 				new IntentFilter(RssDownloadService.NOTIFICATION));
 	}
-	
 
 	@Override
 	public void onStop() {
diff --git a/com.example.android.rssfeed/src/com/example/android/rssfeed/RssApplication.java b/com.example.android.rssfeed/src/com/example/android/rssfeed/RssApplication.java
@@ -9,4 +9,15 @@
 
 public class RssApplication extends Application {
 	public static List<RssItem> list = new ArrayList<RssItem>();
+	
+	@Override
+	public void onLowMemory() {
+		super.onLowMemory();
+	}
+	@Override
+	public void onTrimMemory(int level) {
+		// TODO Auto-generated method stub
+		super.onTrimMemory(level);
+	}
+	
 }
diff --git a/com.example.android.rssfeed/src/com/example/android/rssfeed/RssItemListAdapter.java b/com.example.android.rssfeed/src/com/example/android/rssfeed/RssItemListAdapter.java
@@ -11,25 +11,27 @@
 
 import com.example.android.rssfeedlibrary.RssItem;
 
-public class MyAdapter extends ArrayAdapter<RssItem> {
+public class RssItemListAdapter extends ArrayAdapter<RssItem> {
 
 	private Context context;
 	private List<RssItem> items;
 
-	public MyAdapter(Context context, int textViewResourceId,
-			List<RssItem> items) {
-		super(context, textViewResourceId, items);
+	public RssItemListAdapter(Context context, List<RssItem> items) {
+		super(context, android.R.layout.simple_list_item_1, items);
 		this.context = context;
 		this.items = items;
 	}
 
 	@Override
 	public View getView(int position, View convertView, ViewGroup parent) {
+		// not performance optimized
 		LayoutInflater inflater = (LayoutInflater) context
 				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-		View view = inflater.inflate(android.R.layout.simple_list_item_1, null);
-		TextView textView = (TextView) view.findViewById(android.R.id.text1);
-		textView.setText(items.get(position).getTitle());
+		View view = inflater.inflate(R.layout.listview_rowlayout, null);
+		TextView rssTitelView = (TextView) view.findViewById(R.id.rsstitle);
+		rssTitelView.setText(items.get(position).getTitle());
+		TextView rssUrlView = (TextView) view.findViewById(R.id.rssurl);
+		rssUrlView.setText(items.get(position).getLink());
 		return view;
 	}
 }
diff --git a/com.example.android.rssfeed/src/com/example/android/rssfeed/RssfeedActivity.java b/com.example.android.rssfeed/src/com/example/android/rssfeed/RssfeedActivity.java
@@ -1,6 +1,8 @@
 package com.example.android.rssfeed;
 
 import android.app.Activity;
+import android.app.FragmentManager;
+import android.app.FragmentTransaction;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
@@ -11,10 +13,21 @@
 public class RssfeedActivity extends Activity implements
 		MyListFragment.OnItemSelectedListener {
 
+	private static final String HEADLESS = "HEADLESS";
+	
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_rssfeed);
+		FragmentManager manager = getFragmentManager();
+		HeadlessFragment headlessFragment = (HeadlessFragment) manager.findFragmentByTag(HEADLESS);
+		
+		if (headlessFragment==null) {
+			FragmentTransaction transaction = manager.beginTransaction();
+			transaction.add(new HeadlessFragment(), HEADLESS);
+			transaction.commit();
+		}
+		
 	}
 	
 	@Override
diff --git a/com.example.android.rssfeed/src/com/example/android/rssfeed/asynctask/MyListFragment.java b/com.example.android.rssfeed/src/com/example/android/rssfeed/asynctask/MyListFragment.java
@@ -1,5 +1,6 @@
 package com.example.android.rssfeed.asynctask;
 
+import java.util.ArrayList;
 import java.util.List;
 
 import android.app.Activity;
@@ -10,23 +11,21 @@
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
 
-import com.example.android.rssfeed.MyAdapter;
-import com.example.android.rssfeed.RssApplication;
 import com.example.android.rssfeedlibrary.RssFeedProvider;
 import com.example.android.rssfeedlibrary.RssItem;
 
 public class MyListFragment extends ListFragment {
 	private OnItemSelectedListener listener;
 	ParseTask parseTask;
+	private List<RssItem> list = new ArrayList<RssItem>();;
 
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
-		List<RssItem> list = RssApplication.list;
-		MyAdapter adapter = new MyAdapter(getActivity(),
-				android.R.layout.simple_list_item_1, list);
+		ArrayAdapter adapter = new ArrayAdapter<RssItem>(getActivity(),
+				android.R.layout.simple_list_item_1, android.R.id.text1, list);
 		setListAdapter(adapter);
-		// setRetainInstance(true);
+		setRetainInstance(true);
 	}
 
 	// @Override
@@ -54,8 +53,8 @@ public void setFragment(MyListFragment fragment) {
 
 		@Override
 		protected List<RssItem> doInBackground(String... params) {
-			List<RssItem> list = RssFeedProvider.parse(params[0]);
-			return list;
+			List<RssItem> result = RssFeedProvider.parse(params[0]);
+			return result;
 		}
 
 		@Override
@@ -73,6 +72,7 @@ public void updateListContent() {
 	}
 
 	public void setListContent(List<RssItem> result) {
+		list = result;
 		ArrayAdapter listAdapter = (ArrayAdapter) getListAdapter();
 		listAdapter.clear();
 		listAdapter.addAll(result);
