gecko/mobile/android/base/GeckoAsyncTask.java
2012-07-17 17:54:54 -07:00

53 lines
1.8 KiB
Java

/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko;
// AsyncTask runs onPostExecute on the thread it is constructed on
// We construct these off of the main thread, and we want that to run
// on the main UI thread, so this is a convenience class to do that
public abstract class GeckoAsyncTask<Params, Progress, Result> {
public static final int PRIORITY_NORMAL = 0;
public static final int PRIORITY_HIGH = 1;
private int mPriority;
public GeckoAsyncTask() {
mPriority = PRIORITY_NORMAL;
}
private class BackgroundTaskRunnable implements Runnable {
private Params[] mParams;
public BackgroundTaskRunnable(Params... params) {
mParams = params;
}
public void run() {
final Result result = doInBackground(mParams);
GeckoApp.mAppContext.runOnUiThread(new Runnable() {
public void run() {
onPostExecute(result);
}
});
}
}
public void execute(final Params... params) {
if (mPriority == PRIORITY_HIGH)
GeckoAppShell.getHandler().postAtFrontOfQueue(new BackgroundTaskRunnable(params));
else
GeckoAppShell.getHandler().post(new BackgroundTaskRunnable(params));
}
public GeckoAsyncTask<Params, Progress, Result> setPriority(int priority) {
mPriority = priority;
return this;
}
protected abstract Result doInBackground(Params... params);
protected abstract void onPostExecute(Result result);
}