19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2011 Google Inc. 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed to The Android Open Source Project. 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage com.android.ex.photo.loaders; 193f7e35c2c7d3d7f08f50c1d93cd16b1f49354cccAmith Yamasani 201719a39a4c0ff3afbf9c9e5f03f20ba50f490902Ken Shirriffimport android.content.AsyncTaskLoader; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.ContentResolver; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Bitmap; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.net.Uri; 25c64edde69d18498fb2954f71a546357b07ab996aEvan Millarimport android.util.DisplayMetrics; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27f37447bad3773b62176baa837908daf6edb44273Amith Yamasaniimport com.android.ex.photo.fragments.PhotoViewFragment; 28e9b06d754af03faf27012fbed1e7559ec1ba7c79Wink Savilleimport com.android.ex.photo.util.ImageUtils; 29627bba736d022c39696b7c582a6af5592d2b8c33Dianne Hackborn 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 311d442e0d990b581357f33f5463c7c5cb49b551e8Dianne Hackborn * Loader for the bitmap of a photo. 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class PhotoBitmapLoader extends AsyncTaskLoader<Bitmap> { 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private String mPhotoUri; 353718aaabe6259dcf86a3666ff92d16e4be5da555Amith Yamasani 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Bitmap mBitmap; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public PhotoBitmapLoader(Context context, String photoUri) { 393718aaabe6259dcf86a3666ff92d16e4be5da555Amith Yamasani super(context); 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPhotoUri = photoUri; 411d442e0d990b581357f33f5463c7c5cb49b551e8Dianne Hackborn } 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setPhotoUri(String photoUri) { 44c64edde69d18498fb2954f71a546357b07ab996aEvan Millar mPhotoUri = photoUri; 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Bitmap loadInBackground() { 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Context context = getContext(); 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (context != null && mPhotoUri != null) { 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ContentResolver resolver = context.getContentResolver(); 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Bitmap bitmap = ImageUtils.createLocalBitmap(resolver, Uri.parse(mPhotoUri), 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project PhotoViewFragment.sPhotoSize); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bitmap != null) { 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bitmap.setDensity(DisplayMetrics.DENSITY_MEDIUM); 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bitmap; 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 60cfc893d27a59bddbc5d0da0038e8313f6c379f86Amith Yamasani 61e43530ab571e901f94361078c7c1f970a0bd27f2Amith Yamasani return null; 629e0f5d9a63ba88c2bf69df0557f8c9696db370c4Dianne Hackborn } 639e0f5d9a63ba88c2bf69df0557f8c9696db370c4Dianne Hackborn 649e0f5d9a63ba88c2bf69df0557f8c9696db370c4Dianne Hackborn /** 659e0f5d9a63ba88c2bf69df0557f8c9696db370c4Dianne Hackborn * Called when there is new data to deliver to the client. The 669e0f5d9a63ba88c2bf69df0557f8c9696db370c4Dianne Hackborn * super class will take care of delivering it; the implementation 679e0f5d9a63ba88c2bf69df0557f8c9696db370c4Dianne Hackborn * here just adds a little more logic. 689e0f5d9a63ba88c2bf69df0557f8c9696db370c4Dianne Hackborn */ 69e43530ab571e901f94361078c7c1f970a0bd27f2Amith Yamasani @Override 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void deliverResult(Bitmap bitmap) { 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isReset()) { 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // An async query came in while the loader is stopped. We 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // don't need the result. 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bitmap != null) { 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onReleaseResources(bitmap); 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Bitmap oldBitmap = mBitmap; 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBitmap = bitmap; 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isStarted()) { 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If the Loader is currently started, we can immediately 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // deliver its results. 84c64edde69d18498fb2954f71a546357b07ab996aEvan Millar super.deliverResult(bitmap); 85c64edde69d18498fb2954f71a546357b07ab996aEvan Millar } 86c64edde69d18498fb2954f71a546357b07ab996aEvan Millar 87c64edde69d18498fb2954f71a546357b07ab996aEvan Millar // At this point we can release the resources associated with 88c64edde69d18498fb2954f71a546357b07ab996aEvan Millar // 'oldBitmap' if needed; now that the new result is delivered we 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // know that it is no longer in use. 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (oldBitmap != null && oldBitmap != bitmap && !oldBitmap.isRecycled()) { 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onReleaseResources(oldBitmap); 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handles a request to start the Loader. 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onStartLoading() { 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mBitmap != null) { 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If we currently have a result available, deliver it 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // immediately. 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project deliverResult(mBitmap); 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (takeContentChanged() || mBitmap == null) { 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If the data has changed since the last time it was loaded 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // or is not currently available, start a load. 109c64edde69d18498fb2954f71a546357b07ab996aEvan Millar forceLoad(); 1103718aaabe6259dcf86a3666ff92d16e4be5da555Amith Yamasani } 111617f877c06c82584a38f41bb60d836e08c5e3bdaDianne Hackborn } 112c64edde69d18498fb2954f71a546357b07ab996aEvan Millar 113617f877c06c82584a38f41bb60d836e08c5e3bdaDianne Hackborn /** 114617f877c06c82584a38f41bb60d836e08c5e3bdaDianne Hackborn * Handles a request to stop the Loader. 115617f877c06c82584a38f41bb60d836e08c5e3bdaDianne Hackborn */ 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override protected void onStopLoading() { 117c64edde69d18498fb2954f71a546357b07ab996aEvan Millar // Attempt to cancel the current load task if possible. 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cancelLoad(); 119244fa5c05b2cc8c4c0754aeed4ee42c588ea89d1Amith Yamasani } 120244fa5c05b2cc8c4c0754aeed4ee42c588ea89d1Amith Yamasani 121244fa5c05b2cc8c4c0754aeed4ee42c588ea89d1Amith Yamasani /** 122244fa5c05b2cc8c4c0754aeed4ee42c588ea89d1Amith Yamasani * Handles a request to cancel a load. 123244fa5c05b2cc8c4c0754aeed4ee42c588ea89d1Amith Yamasani */ 124244fa5c05b2cc8c4c0754aeed4ee42c588ea89d1Amith Yamasani @Override 125627bba736d022c39696b7c582a6af5592d2b8c33Dianne Hackborn public void onCanceled(Bitmap bitmap) { 126c64edde69d18498fb2954f71a546357b07ab996aEvan Millar super.onCanceled(bitmap); 127c64edde69d18498fb2954f71a546357b07ab996aEvan Millar 128f37447bad3773b62176baa837908daf6edb44273Amith Yamasani // At this point we can release the resources associated with 'bitmap' 129f37447bad3773b62176baa837908daf6edb44273Amith Yamasani // if needed. 130f37447bad3773b62176baa837908daf6edb44273Amith Yamasani onReleaseResources(bitmap); 131627bba736d022c39696b7c582a6af5592d2b8c33Dianne Hackborn } 132c64edde69d18498fb2954f71a546357b07ab996aEvan Millar 133c64edde69d18498fb2954f71a546357b07ab996aEvan Millar /** 134627bba736d022c39696b7c582a6af5592d2b8c33Dianne Hackborn * Handles a request to completely reset the Loader. 135105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project */ 136c64edde69d18498fb2954f71a546357b07ab996aEvan Millar @Override 137617f877c06c82584a38f41bb60d836e08c5e3bdaDianne Hackborn protected void onReset() { 138d4c5f8919b0522bcaab41a5863c313fec52d3a79Eric Shienbrood super.onReset(); 139d4c5f8919b0522bcaab41a5863c313fec52d3a79Eric Shienbrood 140c64edde69d18498fb2954f71a546357b07ab996aEvan Millar // Ensure the loader is stopped 141105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project onStopLoading(); 142105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project 143c64edde69d18498fb2954f71a546357b07ab996aEvan Millar // At this point we can release the resources associated with 'bitmap' 1443f7e35c2c7d3d7f08f50c1d93cd16b1f49354cccAmith Yamasani // if needed. 1453f7e35c2c7d3d7f08f50c1d93cd16b1f49354cccAmith Yamasani if (mBitmap != null) { 1463f7e35c2c7d3d7f08f50c1d93cd16b1f49354cccAmith Yamasani onReleaseResources(mBitmap); 1473f7e35c2c7d3d7f08f50c1d93cd16b1f49354cccAmith Yamasani mBitmap = null; 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Helper function to take care of releasing resources associated 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * with an actively loaded data set. 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onReleaseResources(Bitmap bitmap) { 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bitmap != null && !bitmap.isRecycled()) { 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bitmap.recycle(); 1583718aaabe6259dcf86a3666ff92d16e4be5da555Amith Yamasani } 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1613718aaabe6259dcf86a3666ff92d16e4be5da555Amith Yamasani