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Diffstat (limited to 'subsonic-android/src/github/daneren2005/subphonic/util/ModalBackgroundTask.java')
-rw-r--r-- | subsonic-android/src/github/daneren2005/subphonic/util/ModalBackgroundTask.java | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/subsonic-android/src/github/daneren2005/subphonic/util/ModalBackgroundTask.java b/subsonic-android/src/github/daneren2005/subphonic/util/ModalBackgroundTask.java new file mode 100644 index 00000000..4bd384db --- /dev/null +++ b/subsonic-android/src/github/daneren2005/subphonic/util/ModalBackgroundTask.java @@ -0,0 +1,139 @@ +/* + 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); + } + }); + } +} |