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