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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.subphonic.util;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.util.Log;
import github.daneren2005.subphonic.R;
/**
* @author Sindre Mehus
*/
public abstract class ModalBackgroundTask<T> extends BackgroundTask<T> {
private static final String TAG = ModalBackgroundTask.class.getSimpleName();
private final AlertDialog progressDialog;
private Thread thread;
private final boolean finishActivityOnCancel;
private boolean cancelled;
public ModalBackgroundTask(Activity activity, boolean finishActivityOnCancel) {
super(activity);
this.finishActivityOnCancel = finishActivityOnCancel;
progressDialog = createProgressDialog();
}
public ModalBackgroundTask(Activity activity) {
this(activity, true);
}
private AlertDialog createProgressDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setIcon(android.R.drawable.ic_dialog_info);
builder.setTitle(R.string.background_task_wait);
builder.setMessage(R.string.background_task_loading);
builder.setCancelable(true);
builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialogInterface) {
cancel();
}
});
builder.setPositiveButton(R.string.common_cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
cancel();
}
});
return builder.create();
}
public void execute() {
cancelled = false;
progressDialog.show();
thread = new Thread() {
@Override
public void run() {
try {
final T result = doInBackground();
if (cancelled) {
progressDialog.dismiss();
return;
}
getHandler().post(new Runnable() {
@Override
public void run() {
progressDialog.dismiss();
done(result);
}
});
} catch (final Throwable t) {
if (cancelled) {
return;
}
getHandler().post(new Runnable() {
@Override
public void run() {
progressDialog.dismiss();
error(t);
}
});
}
}
};
thread.start();
}
protected void cancel() {
cancelled = true;
if (thread != null) {
thread.interrupt();
}
if (finishActivityOnCancel) {
getActivity().finish();
}
}
protected boolean isCancelled() {
return cancelled;
}
protected void error(Throwable error) {
Log.w(TAG, "Got exception: " + error, error);
new ErrorDialog(getActivity(), getErrorMessage(error), finishActivityOnCancel);
}
@Override
public void updateProgress(final String message) {
getHandler().post(new Runnable() {
@Override
public void run() {
progressDialog.setMessage(message);
}
});
}
}
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