1 files changed, 96 insertions, 0 deletions
diff --git a/subsonic-android/src/net/sourceforge/subsonic/androidapp/util/BackgroundTask.java b/subsonic-android/src/net/sourceforge/subsonic/androidapp/util/BackgroundTask.java
new file mode 100644
index 00000000..1db2fdc1
--- /dev/null
+++ b/subsonic-android/src/net/sourceforge/subsonic/androidapp/util/BackgroundTask.java
@@ -0,0 +1,96 @@
+/*
+ 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 net.sourceforge.subsonic.androidapp.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 net.sourceforge.subsonic.androidapp.R;
+
+/**
+ * @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));
+    }
+}
+\ No newline at end of file