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/*
This file is part of Subsonic.
Subsonic is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Subsonic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
Copyright 2009 (C) Sindre Mehus
*/
package github.daneren2005.dsub.util;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.xmlpull.v1.XmlPullParserException;
import android.app.Activity;
import android.os.Handler;
import android.util.Log;
import github.daneren2005.dsub.R;
import github.daneren2005.dsub.view.ErrorDialog;
/**
* @author Sindre Mehus
*/
public abstract class BackgroundTask<T> implements ProgressListener {
private static final String TAG = BackgroundTask.class.getSimpleName();
private final Activity activity;
private final Handler handler;
public BackgroundTask(Activity activity) {
this.activity = activity;
handler = new Handler();
}
protected Activity getActivity() {
return activity;
}
protected Handler getHandler() {
return handler;
}
public abstract void execute();
protected abstract T doInBackground() throws Throwable;
protected abstract void done(T result);
protected void error(Throwable error) {
Log.w(TAG, "Got exception: " + error, error);
new ErrorDialog(activity, getErrorMessage(error), true);
}
protected String getErrorMessage(Throwable error) {
if (error instanceof IOException && !Util.isNetworkConnected(activity)) {
return activity.getResources().getString(R.string.background_task_no_network);
}
if (error instanceof FileNotFoundException) {
return activity.getResources().getString(R.string.background_task_not_found);
}
if (error instanceof IOException) {
return activity.getResources().getString(R.string.background_task_network_error);
}
if (error instanceof XmlPullParserException) {
return activity.getResources().getString(R.string.background_task_parse_error);
}
String message = error.getMessage();
if (message != null) {
return message;
}
return error.getClass().getSimpleName();
}
@Override
public abstract void updateProgress(final String message);
@Override
public void updateProgress(int messageId) {
updateProgress(activity.getResources().getString(messageId));
}
}
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