ImageRequest.java revision d56b88ae161057e848e7410d1b9ce5b0b8c427fc
1d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru/* 2d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * Copyright (C) 2011 The Android Open Source Project 3d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * 4d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * Licensed under the Apache License, Version 2.0 (the "License"); 5d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * you may not use this file except in compliance with the License. 6d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * You may obtain a copy of the License at 7d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * 8d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * http://www.apache.org/licenses/LICENSE-2.0 9d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * 10d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * Unless required by applicable law or agreed to in writing, software 11d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * distributed under the License is distributed on an "AS IS" BASIS, 12d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * See the License for the specific language governing permissions and 14d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * limitations under the License. 15d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru */ 16d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 17d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Querupackage com.android.volley.toolbox; 18d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 19d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queruimport com.android.volley.DefaultRetryPolicy; 20d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queruimport com.android.volley.NetworkResponse; 21d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queruimport com.android.volley.ParseError; 22d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queruimport com.android.volley.Request; 23d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queruimport com.android.volley.Response; 24d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queruimport com.android.volley.VolleyLog; 25d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 26d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queruimport android.graphics.Bitmap; 27d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queruimport android.graphics.Bitmap.Config; 28d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queruimport android.graphics.BitmapFactory; 29d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 30d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru/** 31d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * A canned request for getting an image at a given URL and calling 32d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * back with a decoded Bitmap. 33d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru */ 34d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Querupublic class ImageRequest extends Request<Bitmap> { 35d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru /** Socket timeout in milliseconds for image requests */ 36d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private static final int IMAGE_TIMEOUT_MS = 1000; 37d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 38d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru /** Default number of retries for image requests */ 39d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private static final int IMAGE_MAX_RETRIES = 2; 40d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 41d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru /** Default backoff multiplier for image requests */ 42d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private static final float IMAGE_BACKOFF_MULT = 2f; 43d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 44d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private final Response.Listener<Bitmap> mListener; 45d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private final Config mDecodeConfig; 46d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private final int mMaxWidth; 47d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private final int mMaxHeight; 48d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 49d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru /** Decoding lock so that we don't decode more than one image at a time (to avoid OOM's) */ 50d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private static final Object sDecodeLock = new Object(); 51d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 52d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru /** 53d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * Creates a new image request, decoding to a maximum specified width and 54d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * height. If both width and height are zero, the image will be decoded to 55d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * its natural size. If one of the two is nonzero, that dimension will be 56d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * clamped and the other one will be set to preserve the image's aspect 57d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * ratio. If both width and height are nonzero, the image will be decoded to 58d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * be fit in the rectangle of dimensions width x height while keeping its 59d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * aspect ratio. 60d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * 61d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param url URL of the image 62d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param listener Listener to receive the decoded bitmap 63d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param maxWidth Maximum width to decode this bitmap to, or zero for none 64d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param maxHeight Maximum height to decode this bitmap to, or zero for 65d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * none 66d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param decodeConfig Format to decode the bitmap to 67d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param errorListener Error listener, or null to ignore errors 68d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru */ 69d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru public ImageRequest(String url, Response.Listener<Bitmap> listener, int maxWidth, int maxHeight, 70d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru Config decodeConfig, Response.ErrorListener errorListener) { 71d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru super(url, errorListener); 72d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru setRetryPolicy( 73d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru new DefaultRetryPolicy(IMAGE_TIMEOUT_MS, IMAGE_MAX_RETRIES, IMAGE_BACKOFF_MULT)); 74d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru mListener = listener; 75d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru mDecodeConfig = decodeConfig; 76d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru mMaxWidth = maxWidth; 77d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru mMaxHeight = maxHeight; 78d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 79d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 80d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru @Override 81d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru public Priority getPriority() { 82d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return Priority.LOW; 83d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 84d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 85d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru /** 86d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * Scales one side of a rectangle to fit aspect ratio. 87d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * 88d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param maxPrimary Maximum size of the primary dimension (i.e. width for 89d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * max width), or zero to maintain aspect ratio with secondary 90d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * dimension 91d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param maxSecondary Maximum size of the secondary dimension, or zero to 92d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * maintain aspect ratio with primary dimension 93d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param actualPrimary Actual size of the primary dimension 94d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param actualSecondary Actual size of the secondary dimension 95d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru */ 96d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private static int getResizedDimension(int maxPrimary, int maxSecondary, int actualPrimary, 97d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru int actualSecondary) { 98d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // If no dominant value at all, just return the actual. 99d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru if (maxPrimary == 0 && maxSecondary == 0) { 100d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return actualPrimary; 101d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 102d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 103d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // If primary is unspecified, scale primary to match secondary's scaling ratio. 104d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru if (maxPrimary == 0) { 105d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru double ratio = (double) maxSecondary / (double) actualSecondary; 106d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return (int) (actualPrimary * ratio); 107d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 108d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 109d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru if (maxSecondary == 0) { 110d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return maxPrimary; 111d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 112d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 113d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru double ratio = (double) actualSecondary / (double) actualPrimary; 114d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru int resized = maxPrimary; 115d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru if (resized * ratio > maxSecondary) { 116d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru resized = (int) (maxSecondary / ratio); 117d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 118d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return resized; 119d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 120d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 121d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru @Override 122d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru protected Response<Bitmap> parseNetworkResponse(NetworkResponse response) { 123d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // Serialize all decode on a global lock to reduce concurrent heap usage. 124d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru synchronized (sDecodeLock) { 125d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru try { 126d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return doParse(response); 127d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } catch (OutOfMemoryError e) { 128d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru VolleyLog.e("Caught OOM for %d byte image, url=%s", response.data.length, getUrl()); 129d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return Response.error(new ParseError(e)); 130d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 131d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 132d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 133d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 134d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru /** 135d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * The real guts of parseNetworkResponse. Broken out for readability. 136d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru */ 137d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru private Response<Bitmap> doParse(NetworkResponse response) { 138d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru byte[] data = response.data; 139d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru BitmapFactory.Options decodeOptions = new BitmapFactory.Options(); 140d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru Bitmap bitmap = null; 141d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru if (mMaxWidth == 0 && mMaxHeight == 0) { 142d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru decodeOptions.inPreferredConfig = mDecodeConfig; 143d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru bitmap = BitmapFactory.decodeByteArray(data, 0, data.length, decodeOptions); 144d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } else { 145d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // If we have to resize this image, first get the natural bounds. 146d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru decodeOptions.inJustDecodeBounds = true; 147d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru BitmapFactory.decodeByteArray(data, 0, data.length, decodeOptions); 148d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru int actualWidth = decodeOptions.outWidth; 149d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru int actualHeight = decodeOptions.outHeight; 150d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 151d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // Then compute the dimensions we would ideally like to decode to. 152d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru int desiredWidth = getResizedDimension(mMaxWidth, mMaxHeight, 153d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru actualWidth, actualHeight); 154d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru int desiredHeight = getResizedDimension(mMaxHeight, mMaxWidth, 155d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru actualHeight, actualWidth); 156d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 157d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // Decode to the nearest power of two scaling factor. 158d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru decodeOptions.inJustDecodeBounds = false; 159d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // TODO(ficus): Do we need this or is it okay since API 8 doesn't support it? 160d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // decodeOptions.inPreferQualityOverSpeed = PREFER_QUALITY_OVER_SPEED; 161d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru decodeOptions.inSampleSize = 162d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru findBestSampleSize(actualWidth, actualHeight, desiredWidth, desiredHeight); 163d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru Bitmap tempBitmap = 164d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru BitmapFactory.decodeByteArray(data, 0, data.length, decodeOptions); 165d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 166d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // Then scale to the exact desired size, if necessary. 167d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru if (tempBitmap != null && (tempBitmap.getWidth() != desiredWidth || 168d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru tempBitmap.getHeight() != desiredHeight)) { 169d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru bitmap = Bitmap.createScaledBitmap(tempBitmap, 170d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru desiredWidth, desiredHeight, true); 171d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru tempBitmap.recycle(); 172d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } else { 173d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru bitmap = tempBitmap; 174d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 175d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 176d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 177d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru if (bitmap == null) { 178d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return Response.error(new ParseError()); 179d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } else { 180d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return Response.success(bitmap, HttpHeaderParser.parseCacheHeaders(response)); 181d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 182d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 183d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 184d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru @Override 185d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru protected void deliverResponse(Bitmap response) { 186d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru mListener.onResponse(response); 187d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 188d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 189d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru /** 190d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * Returns the largest power-of-two divisor for use in downscaling a bitmap 191d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * that will not result in the scaling past the desired dimensions. 192d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * 193d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param actualWidth Actual width of the bitmap 194d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param actualHeight Actual height of the bitmap 195d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param desiredWidth Desired width of the bitmap 196d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru * @param desiredHeight Desired height of the bitmap 197d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru */ 198d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru // Visible for testing. 199d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru static int findBestSampleSize( 200d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru int actualWidth, int actualHeight, int desiredWidth, int desiredHeight) { 201d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru double wr = (double) actualWidth / desiredWidth; 202d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru double hr = (double) actualHeight / desiredHeight; 203d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru double ratio = Math.min(wr, hr); 204d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru float n = 1.0f; 205d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru while ((n * 2) <= ratio) { 206d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru n *= 2; 207d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 208d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru 209d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru return (int) n; 210d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru } 211d56b88ae161057e848e7410d1b9ce5b0b8c427fcJean-Baptiste Queru} 212