Added FileObserver

src/de/danoeh/antennapod/activity/DirectoryChooserActivity.java

@@ -7,6 +7,7 @@ import java.util.Collections;
 
 import android.os.Bundle;
 import android.os.Environment;
+import android.os.FileObserver;
 import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -16,11 +17,13 @@ import android.widget.ArrayAdapter;
 import android.widget.Button;
 import android.widget.ImageButton;
 import android.widget.ListView;
+import android.widget.SlidingDrawer;
 import android.widget.TextView;
 
 import com.actionbarsherlock.app.SherlockActivity;
 import com.actionbarsherlock.view.Menu;
 import com.actionbarsherlock.view.MenuInflater;
+import com.actionbarsherlock.view.MenuItem;
 
 import de.danoeh.antennapod.AppConfig;
 import de.danoeh.antennapod.PodcastApp;
@@ -41,10 +44,13 @@ public class DirectoryChooserActivity extends SherlockActivity {
 	private File selectedDir;
 	private File[] filesInDir;
 
+	private FileObserver fileObserver;
+
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
 		setTheme(PodcastApp.getThemeResourceId());
 		super.onCreate(savedInstanceState);
+		getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
 		setContentView(R.layout.directory_chooser);
 		butConfirm = (Button) findViewById(R.id.butConfirm);
@@ -102,6 +108,22 @@ public class DirectoryChooserActivity extends SherlockActivity {
 		changeDirectory(Environment.getExternalStorageDirectory());
 	}
 
+	@Override
+	protected void onPause() {
+		super.onPause();
+		if (fileObserver != null) {
+			fileObserver.stopWatching();
+		}
+	}
+
+	@Override
+	protected void onResume() {
+		super.onResume();
+		if (fileObserver != null) {
+			fileObserver.startWatching();
+		}
+	}
+
 	private void changeDirectory(File dir) {
 		if (dir != null && dir.isDirectory()) {
 			File[] contents = dir.listFiles();
@@ -126,10 +148,14 @@ public class DirectoryChooserActivity extends SherlockActivity {
 				selectedDir = dir;
 				txtvSelectedFolder.setText(dir.getAbsolutePath());
 				listDirectoriesAdapter.notifyDataSetChanged();
+				fileObserver = createFileObserver(dir.getAbsolutePath());
+				fileObserver.startWatching();
 				if (AppConfig.DEBUG)
 					Log.d(TAG, "Changed directory to " + dir.getAbsolutePath());
 			} else {
-				if (AppConfig.DEBUG) Log.d(TAG, "Could not change folder: contents of dir were null");
+				if (AppConfig.DEBUG)
+					Log.d(TAG,
+							"Could not change folder: contents of dir were null");
 			}
 		} else {
 			if (dir == null) {
@@ -142,10 +168,54 @@ public class DirectoryChooserActivity extends SherlockActivity {
 		}
 	}
 
+	private void refreshDirectory() {
+		if (selectedDir != null) {
+			changeDirectory(selectedDir);
+		}
+	}
+
+	private FileObserver createFileObserver(String path) {
+		return new FileObserver(path, FileObserver.CREATE | FileObserver.DELETE
+				| FileObserver.MOVED_FROM | FileObserver.MOVED_TO) {
+
+			@Override
+			public void onEvent(int event, String path) {
+				if (AppConfig.DEBUG)
+					Log.d(TAG, "FileObserver received event " + event);
+				runOnUiThread(new Runnable() {
+
+					@Override
+					public void run() {
+						refreshDirectory();
+					}
+				});
+			}
+		};
+	}
+
 	@Override
 	public boolean onCreateOptionsMenu(Menu menu) {
 		MenuInflater inflater = new MenuInflater(this);
 		inflater.inflate(R.menu.directory_chooser, menu);
 		return true;
 	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+		case android.R.id.home:
+			finish();
+			return true;
+		case R.id.new_folder_item:
+			openNewFolderDialog();
+			return true;
+		default:
+			return false;
+		}
+	}
+
+	private void openNewFolderDialog() {
+		
+	}
+
 }