implemented import worker

res/values/strings.xml

@@ -131,5 +131,7 @@
     <string name="start_import_label">Start import</string>
     <string name="opml_import_label">OPML import</string>
     <string name="opml_directory_error">ERROR!</string>
+    <string name="reading_opml_label">Reading OPML file</string>
+    <string name="opml_reader_error">An error has occured while reading the opml document:</string>
 
 </resources>

src/de/danoeh/antennapod/asynctask/OpmlImportWorker.java

@@ -0,0 +1,103 @@
+package de.danoeh.antennapod.asynctask;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+
+import org.xmlpull.v1.XmlPullParserException;
+
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.opml.OpmlElement;
+import de.danoeh.antennapod.opml.OpmlReader;
+
+import android.app.AlertDialog;
+import android.app.ProgressDialog;
+import android.app.AlertDialog.Builder;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.os.AsyncTask;
+import android.util.Log;
+
+public class OpmlImportWorker extends
+		AsyncTask<Void, Void, ArrayList<OpmlElement>> {
+	private static final String TAG = "OpmlImportWorker";
+
+	private Context context;
+	private File file; // path to opml file
+	private Exception exception;
+
+	private ProgressDialog progDialog;
+
+	public OpmlImportWorker(Context context, File file) {
+		super();
+		this.context = context;
+		this.file = file;
+	}
+
+	@Override
+	protected ArrayList<OpmlElement> doInBackground(Void... params) {
+		if (AppConfig.DEBUG)
+			Log.d(TAG, "Starting background work");
+		FileReader reader = null;
+		// Create reader
+		try {
+			reader = new FileReader(file);
+			if (AppConfig.DEBUG) Log.d(TAG, "Parsing " + file.toString());
+		} catch (FileNotFoundException e) {
+			e.printStackTrace();
+			exception = e;
+			return null;
+		}
+		OpmlReader opmlReader = new OpmlReader();
+		try {
+			ArrayList<OpmlElement> result = opmlReader.readDocument(reader);
+			reader.close();
+			return result;
+		} catch (XmlPullParserException e) {
+			e.printStackTrace();
+			exception = e;
+			return null;
+		} catch (IOException e) {
+			e.printStackTrace();
+			exception = e;
+			return null;
+		}
+
+	}
+
+	@Override
+	protected void onPostExecute(ArrayList<OpmlElement> result) {
+		progDialog.dismiss();
+		if (exception != null) {
+			if (AppConfig.DEBUG)
+				Log.d(TAG,
+						"An error occured while trying to parse the opml document");
+			AlertDialog.Builder alert = new AlertDialog.Builder(context);
+			alert.setTitle(R.string.error_label);
+			alert.setMessage(context.getString(R.string.opml_reader_error)
+					+ exception.getMessage());
+			alert.setNeutralButton(android.R.string.ok, new OnClickListener() {
+
+				@Override
+				public void onClick(DialogInterface dialog, int which) {
+					dialog.dismiss();
+				}
+
+			});
+		}
+	}
+
+	@Override
+	protected void onPreExecute() {
+		progDialog = new ProgressDialog(context);
+		progDialog.setMessage(context.getString(R.string.reading_opml_label));
+		progDialog.setIndeterminate(true);
+		progDialog.setCancelable(false);
+		progDialog.show();
+	}
+
+}