Util.java revision 1efb18228a45952d699af280482e1c51a4582690
1101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin/* 2101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * Copyright (C) 2009 The Android Open Source Project 3101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * 4101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * Licensed under the Apache License, Version 2.0 (the "License"); 5101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * you may not use this file except in compliance with the License. 6101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * You may obtain a copy of the License at 7101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * 8101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * http://www.apache.org/licenses/LICENSE-2.0 9101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * 10101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * Unless required by applicable law or agreed to in writing, software 11101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * distributed under the License is distributed on an "AS IS" BASIS, 12101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * See the License for the specific language governing permissions and 14101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * limitations under the License. 15101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin */ 16101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 17937fc48b37fafe3ffc8f4b52bd9a171bbb4d3a37Owen Linpackage com.android.camera; 18101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 191efb18228a45952d699af280482e1c51a4582690Owen Linimport com.android.camera.gallery.IImage; 201efb18228a45952d699af280482e1c51a4582690Owen Lin 213f3c857e3f34650c15d764810335024654b0fcc3Owen Linimport android.app.Activity; 223f3c857e3f34650c15d764810335024654b0fcc3Owen Linimport android.app.AlertDialog; 233f3c857e3f34650c15d764810335024654b0fcc3Owen Linimport android.content.DialogInterface; 24101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport android.graphics.Bitmap; 25101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport android.graphics.BitmapFactory; 26101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport android.graphics.Matrix; 276227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatraimport android.hardware.Camera.Size; 28101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport android.util.Log; 296227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatraimport android.view.Display; 30ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Changimport android.view.Surface; 31601ce56b034f111b2875e7636776f2f359f6a156Owen Linimport android.view.View; 322c6c6174e2363fccb4e4f29b76290e99234fe140Owen Linimport android.view.animation.Animation; 332c6c6174e2363fccb4e4f29b76290e99234fe140Owen Linimport android.view.animation.TranslateAnimation; 34101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 35101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport java.io.Closeable; 361efb18228a45952d699af280482e1c51a4582690Owen Linimport java.util.List; 37101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 38101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin/** 39101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * Collection of utility functions used in this package. 40101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin */ 41101d528d59f447847d5c6b7578642132c2b76f4fOwen Linpublic class Util { 4234fe2a9d33a5b4ce49862ce4558a36c62ba6d540Chih-Chung Chang private static final String TAG = "Util"; 432c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin public static final int DIRECTION_LEFT = 0; 442c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin public static final int DIRECTION_RIGHT = 1; 452c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin public static final int DIRECTION_UP = 2; 462c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin public static final int DIRECTION_DOWN = 3; 47101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 481efb18228a45952d699af280482e1c51a4582690Owen Lin public static final String REVIEW_ACTION = "com.android.camera.action.REVIEW"; 4935688439f40f00a1376dcfab6e6495989d82e433Wei-Ta Chen 50101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin private Util() { 51101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 52101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 53101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin // Rotates the bitmap by the specified degree. 54101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin // If a new bitmap is created, the original bitmap is recycled. 55101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin public static Bitmap rotate(Bitmap b, int degrees) { 56101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin if (degrees != 0 && b != null) { 57101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin Matrix m = new Matrix(); 58101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin m.setRotate(degrees, 59101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin (float) b.getWidth() / 2, (float) b.getHeight() / 2); 60101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin try { 61101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin Bitmap b2 = Bitmap.createBitmap( 62101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin b, 0, 0, b.getWidth(), b.getHeight(), m, true); 63101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin if (b != b2) { 64101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin b.recycle(); 65101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin b = b2; 66101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 67101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } catch (OutOfMemoryError ex) { 68101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin // We have no memory to rotate. Return the original bitmap. 69101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 70101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 71101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin return b; 72101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 73101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 74101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin /* 75ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * Compute the sample size as a function of minSideLength 76ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * and maxNumOfPixels. 773c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * minSideLength is used to specify that minimal width or height of a 783c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * bitmap. 793c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * maxNumOfPixels is used to specify the maximal size in pixels that is 803c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * tolerable in terms of memory usage. 81ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * 82ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * The function returns a sample size based on the constraints. 83ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * Both size and minSideLength can be passed in as IImage.UNCONSTRAINED, 84ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * which indicates no care of the corresponding constraint. 85ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * The functions prefers returning a sample size that 86ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * generates a smaller bitmap, unless minSideLength = IImage.UNCONSTRAINED. 873c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * 883c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * Also, the function rounds up the sample size to a power of 2 or multiple 893c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * of 8 because BitmapFactory only honors sample size this way. 903c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * For example, BitmapFactory downsamples an image by 2 even though the 913c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * request is 3. So we round up the sample size to avoid OOM. 92101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin */ 93ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang public static int computeSampleSize(BitmapFactory.Options options, 94ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang int minSideLength, int maxNumOfPixels) { 953c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen int initialSize = computeInitialSampleSize(options, minSideLength, 963c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen maxNumOfPixels); 973c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen 983c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen int roundedSize; 99522e836abc90bcb2d4e7a4ac37e269154d06c715Chih-Chung Chang if (initialSize <= 8) { 1003c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen roundedSize = 1; 1013c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen while (roundedSize < initialSize) { 1023c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen roundedSize <<= 1; 1033c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen } 1043c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen } else { 1053c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen roundedSize = (initialSize + 7) / 8 * 8; 1063c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen } 1073c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen 1083c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen return roundedSize; 1093c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen } 1103c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen 1113c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen private static int computeInitialSampleSize(BitmapFactory.Options options, 1123c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen int minSideLength, int maxNumOfPixels) { 113ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang double w = options.outWidth; 114ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang double h = options.outHeight; 115ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang 116ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang int lowerBound = (maxNumOfPixels == IImage.UNCONSTRAINED) ? 1 : 117ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels)); 118ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang int upperBound = (minSideLength == IImage.UNCONSTRAINED) ? 128 : 119ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang (int) Math.min(Math.floor(w / minSideLength), 120ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang Math.floor(h / minSideLength)); 121ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang 122f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen if (upperBound < lowerBound) { 123f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen // return the larger one when there is no overlapping zone. 124f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen return lowerBound; 125f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen } 126f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen 127ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang if ((maxNumOfPixels == IImage.UNCONSTRAINED) && 128ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang (minSideLength == IImage.UNCONSTRAINED)) { 129ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang return 1; 130ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang } else if (minSideLength == IImage.UNCONSTRAINED) { 131ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang return lowerBound; 132ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang } else { 133ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang return upperBound; 134101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 135101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 136101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 137bbc2f2f15a865cf0330cd78a6ea67177c5863b3bOwen Lin public static <T> int indexOf(T [] array, T s) { 138101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin for (int i = 0; i < array.length; i++) { 139101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin if (array[i].equals(s)) { 140101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin return i; 141101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 142101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 143101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin return -1; 144101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 145101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 146724e9b3db93677b753c1267a716e30e6cf5ff3b6Chih-Chung Chang public static void closeSilently(Closeable c) { 147101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin if (c == null) return; 148101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin try { 149101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin c.close(); 150101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } catch (Throwable t) { 151101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin // do nothing 152101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 153101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 154101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 155cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang public static Bitmap makeBitmap(byte[] jpegData, int maxNumOfPixels) { 156cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang try { 157cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang BitmapFactory.Options options = new BitmapFactory.Options(); 158cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inJustDecodeBounds = true; 159cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, 160cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options); 161cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang if (options.mCancel || options.outWidth == -1 162cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang || options.outHeight == -1) { 163cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang return null; 164cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang } 165cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inSampleSize = computeSampleSize( 166cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options, IImage.UNCONSTRAINED, maxNumOfPixels); 167cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inJustDecodeBounds = false; 168cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang 169cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inDither = false; 170cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inPreferredConfig = Bitmap.Config.ARGB_8888; 171cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang return BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, 172cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options); 173cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang } catch (OutOfMemoryError ex) { 174cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang Log.e(TAG, "Got oom exception ", ex); 175cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang return null; 176cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang } 177c1c20e9ce386c1f660059acaede591d2d718995aChih-Chung Chang } 178c1c20e9ce386c1f660059acaede591d2d718995aChih-Chung Chang 179341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang public static void Assert(boolean cond) { 180341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang if (!cond) { 181341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang throw new AssertionError(); 182341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang } 183341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang } 184059daa36dc6e83ca24a16d9b99925e71010bccebOwen Lin 1853f3c857e3f34650c15d764810335024654b0fcc3Owen Lin public static void showFatalErrorAndFinish( 1863f3c857e3f34650c15d764810335024654b0fcc3Owen Lin final Activity activity, String title, String message) { 1873f3c857e3f34650c15d764810335024654b0fcc3Owen Lin DialogInterface.OnClickListener buttonListener = 1883f3c857e3f34650c15d764810335024654b0fcc3Owen Lin new DialogInterface.OnClickListener() { 1893f3c857e3f34650c15d764810335024654b0fcc3Owen Lin public void onClick(DialogInterface dialog, int which) { 1903f3c857e3f34650c15d764810335024654b0fcc3Owen Lin activity.finish(); 1913f3c857e3f34650c15d764810335024654b0fcc3Owen Lin } 1923f3c857e3f34650c15d764810335024654b0fcc3Owen Lin }; 1933f3c857e3f34650c15d764810335024654b0fcc3Owen Lin new AlertDialog.Builder(activity) 1943f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setCancelable(false) 1953f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setIcon(android.R.drawable.ic_dialog_alert) 1963f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setTitle(title) 1973f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setMessage(message) 1983f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setNeutralButton(R.string.details_ok, buttonListener) 1993f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .show(); 2003f3c857e3f34650c15d764810335024654b0fcc3Owen Lin } 2012c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin 202c1f2e3021bf7b12f2a33561e09bd0ab32530382eOwen Lin public static Animation slideOut(View view, int to) { 2032c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin view.setVisibility(View.INVISIBLE); 2042c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin Animation anim; 2052c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin switch (to) { 2062c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_LEFT: 2072c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, -view.getWidth(), 0, 0); 2082c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2092c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_RIGHT: 2102c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, view.getWidth(), 0, 0); 2112c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2122c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_UP: 2132c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, 0, 0, -view.getHeight()); 2142c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2152c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_DOWN: 2162c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, 0, 0, view.getHeight()); 2172c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2182c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin default: 2192c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin throw new IllegalArgumentException(Integer.toString(to)); 2202c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin } 2212c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim.setDuration(500); 2222c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin view.startAnimation(anim); 223c1f2e3021bf7b12f2a33561e09bd0ab32530382eOwen Lin return anim; 2242c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin } 2252c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin 226c1f2e3021bf7b12f2a33561e09bd0ab32530382eOwen Lin public static Animation slideIn(View view, int from) { 2272c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin view.setVisibility(View.VISIBLE); 2282c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin Animation anim; 2292c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin switch (from) { 2302c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_LEFT: 2312c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(-view.getWidth(), 0, 0, 0); 2322c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2332c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_RIGHT: 2342c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(view.getWidth(), 0, 0, 0); 2352c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2362c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_UP: 2372c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, 0, -view.getHeight(), 0); 2382c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2392c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_DOWN: 2402c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, 0, view.getHeight(), 0); 2412c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2422c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin default: 2432c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin throw new IllegalArgumentException(Integer.toString(from)); 2442c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin } 2452c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim.setDuration(500); 2462c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin view.startAnimation(anim); 247c1f2e3021bf7b12f2a33561e09bd0ab32530382eOwen Lin return anim; 2482c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin } 24973e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin 25073e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin public static <T> T checkNotNull(T object) { 25173e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin if (object == null) throw new NullPointerException(); 25273e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin return object; 25373e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin } 25473e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin 25573e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin public static boolean equals(Object a, Object b) { 25673e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin return (a == b) || (a == null ? false : a.equals(b)); 25773e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin } 2584de149ceb47f2c251f646419907424bfb67d2b64Owen Lin 2594de149ceb47f2c251f646419907424bfb67d2b64Owen Lin public static boolean isPowerOf2(int n) { 2604de149ceb47f2c251f646419907424bfb67d2b64Owen Lin return (n & -n) == n; 2614de149ceb47f2c251f646419907424bfb67d2b64Owen Lin } 2624de149ceb47f2c251f646419907424bfb67d2b64Owen Lin 2634de149ceb47f2c251f646419907424bfb67d2b64Owen Lin public static int nextPowerOf2(int n) { 2644de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n -= 1; 2654de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 16; 2664de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 8; 2674de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 4; 2684de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 2; 2694de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 1; 2704de149ceb47f2c251f646419907424bfb67d2b64Owen Lin return n + 1; 2714de149ceb47f2c251f646419907424bfb67d2b64Owen Lin } 27233be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin 27333be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin public static float distance(float x, float y, float sx, float sy) { 27433be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin float dx = x - sx; 27533be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin float dy = y - sy; 27633be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin return (float) Math.sqrt(dx * dx + dy * dy); 27733be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin } 27833be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin 27933be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin public static int clamp(int x, int min, int max) { 28033be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin if (x > max) return max; 28133be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin if (x < min) return min; 28233be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin return x; 28333be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin } 284ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang 2854aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li public static int getDisplayRotation(Activity activity) { 286ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang int rotation = activity.getWindowManager().getDefaultDisplay() 287ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang .getRotation(); 288ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang switch (rotation) { 2894aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li case Surface.ROTATION_0: return 0; 2904aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li case Surface.ROTATION_90: return 90; 2914aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li case Surface.ROTATION_180: return 180; 2924aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li case Surface.ROTATION_270: return 270; 293ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang } 2944aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li return 0; 2954aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li } 296ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang 2974aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li public static void setCameraDisplayOrientation(Activity activity, 2984aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li int cameraId, android.hardware.Camera camera) { 2994aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li android.hardware.Camera.CameraInfo info = 3004aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li new android.hardware.Camera.CameraInfo(); 3014aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li android.hardware.Camera.getCameraInfo(cameraId, info); 3024aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li int degrees = getDisplayRotation(activity); 303c97d23826a28dd725951eccb62651244f9fb8228Wu-cheng Li int result = (info.orientation - degrees + 360) % 360; 304ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang camera.setDisplayOrientation(result); 305ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang } 3066227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra 3076227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra public static Size getOptimalPreviewSize(Activity currentActivity, 3086227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra List<Size> sizes, double targetRatio) { 3096227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra final double ASPECT_TOLERANCE = 0.05; 3106227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra if (sizes == null) return null; 3116227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra 3126227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra Size optimalSize = null; 3136227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra double minDiff = Double.MAX_VALUE; 3146227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra 3156227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra // Because of bugs of overlay and layout, we sometimes will try to 3166227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra // layout the viewfinder in the portrait orientation and thus get the 3176227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra // wrong size of mSurfaceView. When we change the preview size, the 3186227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra // new overlay will be created before the old one closed, which causes 3196227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra // an exception. For now, just get the screen size 3206227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra 3216227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra Display display = currentActivity.getWindowManager().getDefaultDisplay(); 3226227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra int targetHeight = Math.min(display.getHeight(), display.getWidth()); 3236227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra 3246227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra if (targetHeight <= 0) { 3256227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra // We don't know the size of SurfaceView, use screen height 3266227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra targetHeight = display.getHeight(); 3276227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra } 3286227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra 3296227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra // Try to find an size match aspect ratio and size 3306227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra for (Size size : sizes) { 3316227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra double ratio = (double) size.width / size.height; 3326227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue; 3336227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra if (Math.abs(size.height - targetHeight) < minDiff) { 3346227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra optimalSize = size; 3356227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra minDiff = Math.abs(size.height - targetHeight); 3366227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra } 3376227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra } 3386227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra 3396227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra // Cannot find the one match the aspect ratio, ignore the requirement 3406227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra if (optimalSize == null) { 3416227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra Log.v(TAG, "No preview size match the aspect ratio"); 3426227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra minDiff = Double.MAX_VALUE; 3436227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra for (Size size : sizes) { 3446227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra if (Math.abs(size.height - targetHeight) < minDiff) { 3456227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra optimalSize = size; 3466227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra minDiff = Math.abs(size.height - targetHeight); 3476227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra } 3486227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra } 3496227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra } 3506227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra return optimalSize; 3516227fa641518492a6b660c78463da18d9ec8fcd8Nipun Kwatra } 352101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin} 353