Added Media Server browsing.

AndroidManifest.xml

@@ -4,6 +4,11 @@
     android:versionCode="1"
     android:versionName="1.0" >
     
+	<uses-permission android:name="android.permission.INTERNET"/>
+	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
+	<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE"/>
+	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
+
     <uses-sdk
         android:minSdkVersion="8"
         android:targetSdkVersion="17" />
@@ -27,6 +32,8 @@
             
         </activity>
         
+  		<service android:name="org.teleal.cling.android.AndroidUpnpServiceImpl"/>
+        
     </application>    
 
 </manifest>

src/com/github/nutomic/controldlna/FileArrayAdapter.java

@@ -0,0 +1,30 @@
+package com.github.nutomic.controldlna;
+
+import org.teleal.cling.support.model.DIDLObject;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+
+public class FileArrayAdapter extends ArrayAdapter<DIDLObject> {
+	
+	public FileArrayAdapter(Context context) {
+		super(context, android.R.layout.simple_list_item_1);
+	}
+	
+	@Override
+	public View getView(int position, View convertView, ViewGroup parent) {
+		if (convertView == null) {
+	        LayoutInflater inflater = (LayoutInflater) getContext()
+	                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+	        convertView = inflater.inflate(android.R.layout.simple_list_item_1, parent, false);
+		}
+        TextView tv = (TextView) convertView.findViewById(android.R.id.text1);
+        tv.setText(getItem(position).getTitle());
+        return convertView;
+	}
+	
+}

src/com/github/nutomic/controldlna/MainActivity.java

@@ -27,12 +27,14 @@ public class MainActivity extends SherlockFragmentActivity implements
 	 * intensive, it may be best to switch to a
 	 * {@link android.support.v4.app.FragmentStatePagerAdapter}.
 	 */
-	SectionsPagerAdapter mSectionsPagerAdapter;
+	private SectionsPagerAdapter mSectionsPagerAdapter;
 
 	/**
 	 * The {@link ViewPager} that will host the section contents.
 	 */
-	ViewPager mViewPager;
+	private ViewPager mViewPager;
+	
+	private ServerFragment mServerFragment = new ServerFragment();
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
@@ -105,14 +107,18 @@ public class MainActivity extends SherlockFragmentActivity implements
 
 		@Override
 		public Fragment getItem(int position) {
-			// getItem is called to instantiate the fragment for the given page.
-			// Return a DummySectionFragment (defined as a static inner class
-			// below) with the page number as its lone argument.
-			Fragment fragment = new DummySectionFragment();
-			Bundle args = new Bundle();
-			args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
-			fragment.setArguments(args);
-			return fragment;
+			switch (position) {
+			case 0:
+				Fragment fragment = new DummySectionFragment();
+				Bundle args = new Bundle();
+				args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
+				fragment.setArguments(args);
+				return fragment;
+			case 1:
+				return mServerFragment;
+			default:
+				return null;
+			}
 		}
 
 		@Override
@@ -161,4 +167,14 @@ public class MainActivity extends SherlockFragmentActivity implements
 		}
 	}
 	
+	/**
+	 * Forwards to ServerFragment if it is active.
+	 */
+	@Override
+	public void onBackPressed() {
+		if ((getSupportActionBar().getSelectedTab().getPosition() == 1) && 
+				!mServerFragment.onBackPressed())
+			super.onBackPressed();
+	}
+
 }

src/com/github/nutomic/controldlna/ServerArrayAdapter.java

@@ -0,0 +1,30 @@
+package com.github.nutomic.controldlna;
+
+import org.teleal.cling.model.meta.Device;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+
+public class ServerArrayAdapter extends ArrayAdapter<Device<?, ?, ?>> {
+
+	public ServerArrayAdapter(Context context) {
+		super(context, android.R.layout.simple_list_item_1);
+	}
+	
+	@Override
+	public View getView(int position, View convertView, ViewGroup parent) {
+		if (convertView == null) {
+	        LayoutInflater inflater = (LayoutInflater) getContext()
+	                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+	        convertView = inflater.inflate(android.R.layout.simple_list_item_1, parent, false);
+		}
+        TextView tv = (TextView) convertView.findViewById(android.R.id.text1);
+        tv.setText(getItem(position).getDisplayString());
+        return convertView;
+	}
+
+}

src/com/github/nutomic/controldlna/ServerFragment.java

@@ -0,0 +1,275 @@
+package com.github.nutomic.controldlna;
+
+import java.util.Stack;
+
+import org.teleal.cling.android.AndroidUpnpService;
+import org.teleal.cling.android.AndroidUpnpServiceImpl;
+import org.teleal.cling.model.action.ActionInvocation;
+import org.teleal.cling.model.message.UpnpResponse;
+import org.teleal.cling.model.meta.Device;
+import org.teleal.cling.model.meta.LocalDevice;
+import org.teleal.cling.model.meta.RemoteDevice;
+import org.teleal.cling.model.meta.Service;
+import org.teleal.cling.model.types.ServiceType;
+import org.teleal.cling.registry.Registry;
+import org.teleal.cling.registry.RegistryListener;
+import org.teleal.cling.support.contentdirectory.callback.Browse;
+import org.teleal.cling.support.model.BrowseFlag;
+import org.teleal.cling.support.model.DIDLContent;
+import org.teleal.cling.support.model.container.Container;
+import org.teleal.cling.support.model.item.Item;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.support.v4.app.ListFragment;
+import android.util.Log;
+import android.view.View;
+import android.widget.ListView;
+
+public class ServerFragment extends ListFragment {
+	
+	private String TAG = "ServerFragment";
+	
+	/**
+	 * ListView adapter for showing a list of DLNA media servers.
+	 */
+	private ServerArrayAdapter serverAdapter;
+	
+	/**
+	 * Reference to the media server of which folders are currently shown. 
+	 * Null if media servers are shown.
+	 */
+	private Device<?, ?, ?> currentServer;
+	
+	/**
+	 * ListView adapter for showing a list of files/folders.
+	 */
+	private FileArrayAdapter fileAdapter;
+
+	/**
+	 * Holds path to current directory on top, paths for higher directories 
+	 * behind that.
+	 */
+	private Stack<String> currentPath = new Stack<String>();
+	
+	/**
+	 * Cling UPNP service. 
+	 */
+    private AndroidUpnpService upnpService;
+
+    /**
+     * Connection Cling to UPNP service.
+     */
+    private ServiceConnection serviceConnection= new ServiceConnection() {
+
+        public void onServiceConnected(ComponentName className, IBinder service) {
+            upnpService = (AndroidUpnpService) service;
+            Log.i(TAG, "Starting device search");
+            upnpService.getRegistry().addListener(registryListener);
+            upnpService.getControlPoint().search();
+        }
+
+        public void onServiceDisconnected(ComponentName className) {
+            upnpService = null;
+        }
+    };
+
+    /**
+     * Receives updates when devices are added or removed.
+     */
+    private RegistryListener registryListener = new RegistryListener() {
+		
+		@Override
+		public void remoteDeviceUpdated(Registry registry, RemoteDevice device) {
+			if (device == currentServer)
+				getFiles();
+		}
+		
+		@Override
+		public void remoteDeviceRemoved(Registry registry, RemoteDevice device) {
+			remove(device);	
+		}
+		
+		@Override
+		public void remoteDeviceDiscoveryStarted(Registry registry, 
+				RemoteDevice device) {
+		}
+		
+		@Override
+		public void remoteDeviceDiscoveryFailed(Registry registry, 
+				RemoteDevice device, Exception exception) {
+			Log.w(TAG, "Device discovery failed");
+		}
+		
+		@Override
+		public void remoteDeviceAdded(Registry registry, RemoteDevice device) {
+			add(device);
+		}
+		
+		@Override
+		public void localDeviceRemoved(Registry registry, LocalDevice device) {
+			remove(device);	
+		}
+		
+		@Override
+		public void localDeviceAdded(Registry registry, LocalDevice device) {
+			add(device);
+		}
+		
+		@Override
+		public void beforeShutdown(Registry registry) {			
+		}
+		
+		@Override
+		public void afterShutdown() {
+		}
+		
+		/**
+		 * Add a device to the ListView.
+		 */
+		private void add(final Device<?, ?, ?> device) {
+			getActivity().runOnUiThread(new Runnable() {
+				
+				@Override
+				public void run() {
+					if (device.getType().getType().equals("MediaServer"))
+						serverAdapter.add(device);	
+				}
+			});			
+		}
+		
+		/**
+		 * Remove a device from the ListView.
+		 */
+		private void remove(final Device<?, ?, ?> device) {
+			getActivity().runOnUiThread(new Runnable() {
+				
+				@Override
+				public void run() {
+					serverAdapter.remove(device);	
+				}
+			});			
+		}
+	};
+    
+	/**
+	 * Initializes ListView adapters, launches Cling UPNP service.
+	 */
+    @Override
+    public void onActivityCreated(Bundle savedInstanceState) {
+    	super.onActivityCreated(savedInstanceState);
+    	serverAdapter = new ServerArrayAdapter(getActivity());
+    	fileAdapter = new FileArrayAdapter(getActivity());
+    	
+        setListAdapter(serverAdapter);  
+
+        getActivity().getApplicationContext().bindService(
+            new Intent(getActivity(), AndroidUpnpServiceImpl.class),
+            serviceConnection,
+            Context.BIND_AUTO_CREATE
+        );     
+    }
+
+    /**
+     * Closes Cling UPNP service.
+     */
+    @Override
+	public void onDestroy() {
+        super.onDestroy();
+        if (upnpService != null)
+            upnpService.getRegistry().removeListener(registryListener);
+        getActivity().getApplicationContext().unbindService(serviceConnection);
+    }
+    
+    /**
+     * Enters directory browsing mode or enters a deeper level directory.
+     */
+    @Override
+    public void onListItemClick(ListView l, View v, int position, long id) {
+    	if (getListAdapter() == serverAdapter) {
+    		setListAdapter(fileAdapter);
+    		currentServer = serverAdapter.getItem(position);
+    		// Root directory.
+    		getFiles("0");
+    	}
+    	else if (getListAdapter() == fileAdapter) {
+    		if (fileAdapter.getItem(position) instanceof Container) {
+    			getFiles(((Container) fileAdapter.getItem(position)).getId());    			
+    		}
+    	}
+    }
+    
+    /**
+     * Opens a new directory and displays it.
+     */
+    private void getFiles(String directory) {
+		currentPath.push(directory);    	
+    	getFiles();
+    }
+    
+    /**
+     * Displays the current directory on the ListView.
+     */
+    private void getFiles() {
+    	Service<?, ?> service = currentServer.findService(
+    			new ServiceType("schemas-upnp-org", "ContentDirectory"));
+		upnpService.getControlPoint().execute(new Browse(service, 
+				currentPath.peek(), BrowseFlag.DIRECT_CHILDREN) {
+		
+					@SuppressWarnings("rawtypes")
+					@Override
+					public void received(ActionInvocation actionInvocation, 
+							final DIDLContent didl) {
+						getActivity().runOnUiThread(new Runnable() {
+							
+							@Override
+							public void run() {
+								fileAdapter.clear();
+								for (Container c : didl.getContainers()) 
+									fileAdapter.add(c);
+								for (Item i : didl.getItems())
+									fileAdapter.add(i);
+							}
+						});	
+					}
+		
+					@Override
+					public void updateStatus(Status status) {
+					}
+		
+					@SuppressWarnings("rawtypes")
+					@Override
+					public void failure(ActionInvocation actionInvocation, 
+							UpnpResponse operation,	String defaultMessage) {
+						Log.w(TAG, "Failed to load directory contents: " + 
+							defaultMessage);
+					}
+					
+				});    	
+    }
+	
+    /**
+     * Handles back button press to traverse directories (while in directory 
+     * browsing mode).
+     * 
+     * @return True if button press was handled.
+     */
+	public boolean onBackPressed() {
+    	if (getListAdapter() == serverAdapter)
+    		return false;
+		currentPath.pop();
+		if (currentPath.empty()) {
+    		setListAdapter(serverAdapter);
+    		currentServer = null;
+		}
+		else {
+			getFiles();
+		}
+		return true;		
+	}
+
+}