| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.gallery3d.filtershow.tools; |
| |
| import android.graphics.Bitmap; |
| import android.os.AsyncTask; |
| |
| /** |
| * Asynchronous task filtering or doign I/O with bitmaps. |
| */ |
| public class BitmapTask <T> extends AsyncTask<T, Void, Bitmap> { |
| |
| private Callbacks<T> mCallbacks; |
| private static final String LOGTAG = "BitmapTask"; |
| |
| public BitmapTask(Callbacks<T> callbacks) { |
| mCallbacks = callbacks; |
| } |
| |
| @Override |
| protected Bitmap doInBackground(T... params) { |
| if (params == null || mCallbacks == null) { |
| return null; |
| } |
| return mCallbacks.onExecute(params[0]); |
| } |
| |
| @Override |
| protected void onPostExecute(Bitmap result) { |
| if (mCallbacks == null) { |
| return; |
| } |
| mCallbacks.onComplete(result); |
| } |
| |
| @Override |
| protected void onCancelled() { |
| if (mCallbacks == null) { |
| return; |
| } |
| mCallbacks.onCancel(); |
| } |
| |
| /** |
| * Callbacks for the asynchronous task. |
| */ |
| public interface Callbacks<P> { |
| void onComplete(Bitmap result); |
| |
| void onCancel(); |
| |
| Bitmap onExecute(P param); |
| } |
| } |