1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.gallery3d.photoeditor; 18 19 import android.content.Context; 20 import android.graphics.Bitmap; 21 import android.net.Uri; 22 import android.os.AsyncTask; 23 import android.view.Gravity; 24 import android.widget.Toast; 25 26 import com.android.gallery3d.R; 27 28 /** 29 * Asynchronous task for loading source photo screennail. 30 */ 31 public class LoadScreennailTask extends AsyncTask<Uri, Void, Bitmap> { 32 33 /** 34 * Callback for the completed asynchronous task. 35 */ 36 public interface Callback { 37 onComplete(Bitmap result)38 void onComplete(Bitmap result); 39 } 40 41 private static final int SCREENNAIL_WIDTH = 1280; 42 private static final int SCREENNAIL_HEIGHT = 960; 43 44 private final Context context; 45 private final Callback callback; 46 LoadScreennailTask(Context context, Callback callback)47 public LoadScreennailTask(Context context, Callback callback) { 48 this.context = context; 49 this.callback = callback; 50 } 51 52 /** 53 * The task should be executed with one given source photo uri. 54 */ 55 @Override doInBackground(Uri... params)56 protected Bitmap doInBackground(Uri... params) { 57 if (params[0] == null) { 58 return null; 59 } 60 return new BitmapUtils(context).getBitmap(params[0], SCREENNAIL_WIDTH, SCREENNAIL_HEIGHT); 61 } 62 63 @Override onPostExecute(Bitmap result)64 protected void onPostExecute(Bitmap result) { 65 if (result == null) { 66 Toast toast = Toast.makeText(context, R.string.loading_failure, Toast.LENGTH_SHORT); 67 toast.setGravity(Gravity.CENTER, 0, 0); 68 toast.show(); 69 } 70 callback.onComplete(result); 71 } 72 } 73