Util.java revision c1dd72054122befb49aa1ca11ffa589b00186f80
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 193f3c857e3f34650c15d764810335024654b0fcc3Owen Linimport android.app.Activity; 203f3c857e3f34650c15d764810335024654b0fcc3Owen Linimport android.app.AlertDialog; 213f3c857e3f34650c15d764810335024654b0fcc3Owen Linimport android.content.DialogInterface; 22101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport android.graphics.Bitmap; 23101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport android.graphics.BitmapFactory; 24101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport android.graphics.Matrix; 25c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Liimport android.hardware.Camera; 26101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport android.util.Log; 27ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Changimport android.view.Surface; 28601ce56b034f111b2875e7636776f2f359f6a156Owen Linimport android.view.View; 292c6c6174e2363fccb4e4f29b76290e99234fe140Owen Linimport android.view.animation.Animation; 302c6c6174e2363fccb4e4f29b76290e99234fe140Owen Linimport android.view.animation.TranslateAnimation; 31101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 323f3c857e3f34650c15d764810335024654b0fcc3Owen Linimport com.android.camera.gallery.IImage; 33e480f77352d670b2892a9b7b7cd503838b71ca9fRomain Guyimport com.android.camera.R; 343f3c857e3f34650c15d764810335024654b0fcc3Owen Lin 35101d528d59f447847d5c6b7578642132c2b76f4fOwen Linimport java.io.Closeable; 36101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 37101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin/** 38101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin * Collection of utility functions used in this package. 39101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin */ 40101d528d59f447847d5c6b7578642132c2b76f4fOwen Linpublic class Util { 4134fe2a9d33a5b4ce49862ce4558a36c62ba6d540Chih-Chung Chang private static final String TAG = "Util"; 422c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin public static final int DIRECTION_LEFT = 0; 432c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin public static final int DIRECTION_RIGHT = 1; 442c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin public static final int DIRECTION_UP = 2; 452c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin public static final int DIRECTION_DOWN = 3; 46101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 4735688439f40f00a1376dcfab6e6495989d82e433Wei-Ta Chen public static final String REVIEW_ACTION = "com.cooliris.media.action.REVIEW"; 4835688439f40f00a1376dcfab6e6495989d82e433Wei-Ta Chen 49101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin private Util() { 50101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 51101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 52101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin // Rotates the bitmap by the specified degree. 53101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin // If a new bitmap is created, the original bitmap is recycled. 54101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin public static Bitmap rotate(Bitmap b, int degrees) { 55101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin if (degrees != 0 && b != null) { 56101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin Matrix m = new Matrix(); 57101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin m.setRotate(degrees, 58101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin (float) b.getWidth() / 2, (float) b.getHeight() / 2); 59101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin try { 60101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin Bitmap b2 = Bitmap.createBitmap( 61101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin b, 0, 0, b.getWidth(), b.getHeight(), m, true); 62101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin if (b != b2) { 63101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin b.recycle(); 64101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin b = b2; 65101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 66101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } catch (OutOfMemoryError ex) { 67101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin // We have no memory to rotate. Return the original bitmap. 68101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 69101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 70101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin return b; 71101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 72101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 73101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin /* 74ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * Compute the sample size as a function of minSideLength 75ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * and maxNumOfPixels. 763c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * minSideLength is used to specify that minimal width or height of a 773c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * bitmap. 783c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * maxNumOfPixels is used to specify the maximal size in pixels that is 793c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * tolerable in terms of memory usage. 80ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * 81ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * The function returns a sample size based on the constraints. 82ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * Both size and minSideLength can be passed in as IImage.UNCONSTRAINED, 83ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * which indicates no care of the corresponding constraint. 84ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * The functions prefers returning a sample size that 85ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang * generates a smaller bitmap, unless minSideLength = IImage.UNCONSTRAINED. 863c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * 873c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * Also, the function rounds up the sample size to a power of 2 or multiple 883c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * of 8 because BitmapFactory only honors sample size this way. 893c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * For example, BitmapFactory downsamples an image by 2 even though the 903c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen * request is 3. So we round up the sample size to avoid OOM. 91101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin */ 92ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang public static int computeSampleSize(BitmapFactory.Options options, 93ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang int minSideLength, int maxNumOfPixels) { 943c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen int initialSize = computeInitialSampleSize(options, minSideLength, 953c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen maxNumOfPixels); 963c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen 973c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen int roundedSize; 98522e836abc90bcb2d4e7a4ac37e269154d06c715Chih-Chung Chang if (initialSize <= 8) { 993c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen roundedSize = 1; 1003c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen while (roundedSize < initialSize) { 1013c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen roundedSize <<= 1; 1023c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen } 1033c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen } else { 1043c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen roundedSize = (initialSize + 7) / 8 * 8; 1053c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen } 1063c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen 1073c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen return roundedSize; 1083c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen } 1093c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen 1103c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen private static int computeInitialSampleSize(BitmapFactory.Options options, 1113c21008c953cf6177f7771c176fa81d336e74ed8Wei-Ta Chen int minSideLength, int maxNumOfPixels) { 112ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang double w = options.outWidth; 113ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang double h = options.outHeight; 114ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang 115ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang int lowerBound = (maxNumOfPixels == IImage.UNCONSTRAINED) ? 1 : 116ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels)); 117ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang int upperBound = (minSideLength == IImage.UNCONSTRAINED) ? 128 : 118ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang (int) Math.min(Math.floor(w / minSideLength), 119ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang Math.floor(h / minSideLength)); 120ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang 121f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen if (upperBound < lowerBound) { 122f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen // return the larger one when there is no overlapping zone. 123f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen return lowerBound; 124f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen } 125f2c7e983fafaf7639a6ad090a93d1892015777edWei-Ta Chen 126ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang if ((maxNumOfPixels == IImage.UNCONSTRAINED) && 127ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang (minSideLength == IImage.UNCONSTRAINED)) { 128ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang return 1; 129ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang } else if (minSideLength == IImage.UNCONSTRAINED) { 130ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang return lowerBound; 131ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang } else { 132ce033a5871a0b678521411f9a3acaee2ab279178Chih-Chung Chang return upperBound; 133101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 134101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 135101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 136bbc2f2f15a865cf0330cd78a6ea67177c5863b3bOwen Lin public static <T> int indexOf(T [] array, T s) { 137101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin for (int i = 0; i < array.length; i++) { 138101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin if (array[i].equals(s)) { 139101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin return i; 140101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 141101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 142101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin return -1; 143101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 144101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 145724e9b3db93677b753c1267a716e30e6cf5ff3b6Chih-Chung Chang public static void closeSilently(Closeable c) { 146101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin if (c == null) return; 147101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin try { 148101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin c.close(); 149101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } catch (Throwable t) { 150101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin // do nothing 151101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 152101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin } 153101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin 154cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang public static Bitmap makeBitmap(byte[] jpegData, int maxNumOfPixels) { 155cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang try { 156cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang BitmapFactory.Options options = new BitmapFactory.Options(); 157cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inJustDecodeBounds = true; 158cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, 159cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options); 160cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang if (options.mCancel || options.outWidth == -1 161cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang || options.outHeight == -1) { 162cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang return null; 163cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang } 164cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inSampleSize = computeSampleSize( 165cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options, IImage.UNCONSTRAINED, maxNumOfPixels); 166cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inJustDecodeBounds = false; 167cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang 168cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inDither = false; 169cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options.inPreferredConfig = Bitmap.Config.ARGB_8888; 170cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang return BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, 171cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang options); 172cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang } catch (OutOfMemoryError ex) { 173cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang Log.e(TAG, "Got oom exception ", ex); 174cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang return null; 175cd972b0cd67d7a45084d9757ebd49b8f22989eddChih-Chung Chang } 176c1c20e9ce386c1f660059acaede591d2d718995aChih-Chung Chang } 177c1c20e9ce386c1f660059acaede591d2d718995aChih-Chung Chang 178341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang public static void Assert(boolean cond) { 179341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang if (!cond) { 180341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang throw new AssertionError(); 181341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang } 182341ad98e59d92769e1cc8ba68fa86c72dce0543bChih-Chung Chang } 183059daa36dc6e83ca24a16d9b99925e71010bccebOwen Lin 1843f3c857e3f34650c15d764810335024654b0fcc3Owen Lin public static void showFatalErrorAndFinish( 1853f3c857e3f34650c15d764810335024654b0fcc3Owen Lin final Activity activity, String title, String message) { 1863f3c857e3f34650c15d764810335024654b0fcc3Owen Lin DialogInterface.OnClickListener buttonListener = 1873f3c857e3f34650c15d764810335024654b0fcc3Owen Lin new DialogInterface.OnClickListener() { 1883f3c857e3f34650c15d764810335024654b0fcc3Owen Lin public void onClick(DialogInterface dialog, int which) { 1893f3c857e3f34650c15d764810335024654b0fcc3Owen Lin activity.finish(); 1903f3c857e3f34650c15d764810335024654b0fcc3Owen Lin } 1913f3c857e3f34650c15d764810335024654b0fcc3Owen Lin }; 1923f3c857e3f34650c15d764810335024654b0fcc3Owen Lin new AlertDialog.Builder(activity) 1933f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setCancelable(false) 1943f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setIcon(android.R.drawable.ic_dialog_alert) 1953f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setTitle(title) 1963f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setMessage(message) 1973f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .setNeutralButton(R.string.details_ok, buttonListener) 1983f3c857e3f34650c15d764810335024654b0fcc3Owen Lin .show(); 1993f3c857e3f34650c15d764810335024654b0fcc3Owen Lin } 2002c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin 201c1f2e3021bf7b12f2a33561e09bd0ab32530382eOwen Lin public static Animation slideOut(View view, int to) { 2022c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin view.setVisibility(View.INVISIBLE); 2032c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin Animation anim; 2042c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin switch (to) { 2052c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_LEFT: 2062c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, -view.getWidth(), 0, 0); 2072c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2082c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_RIGHT: 2092c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, view.getWidth(), 0, 0); 2102c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2112c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_UP: 2122c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, 0, 0, -view.getHeight()); 2132c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2142c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_DOWN: 2152c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, 0, 0, view.getHeight()); 2162c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2172c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin default: 2182c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin throw new IllegalArgumentException(Integer.toString(to)); 2192c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin } 2202c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim.setDuration(500); 2212c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin view.startAnimation(anim); 222c1f2e3021bf7b12f2a33561e09bd0ab32530382eOwen Lin return anim; 2232c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin } 2242c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin 225c1f2e3021bf7b12f2a33561e09bd0ab32530382eOwen Lin public static Animation slideIn(View view, int from) { 2262c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin view.setVisibility(View.VISIBLE); 2272c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin Animation anim; 2282c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin switch (from) { 2292c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_LEFT: 2302c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(-view.getWidth(), 0, 0, 0); 2312c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2322c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_RIGHT: 2332c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(view.getWidth(), 0, 0, 0); 2342c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2352c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_UP: 2362c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, 0, -view.getHeight(), 0); 2372c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2382c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin case DIRECTION_DOWN: 2392c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim = new TranslateAnimation(0, 0, view.getHeight(), 0); 2402c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin break; 2412c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin default: 2422c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin throw new IllegalArgumentException(Integer.toString(from)); 2432c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin } 2442c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin anim.setDuration(500); 2452c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin view.startAnimation(anim); 246c1f2e3021bf7b12f2a33561e09bd0ab32530382eOwen Lin return anim; 2472c6c6174e2363fccb4e4f29b76290e99234fe140Owen Lin } 24873e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin 24973e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin public static <T> T checkNotNull(T object) { 25073e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin if (object == null) throw new NullPointerException(); 25173e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin return object; 25273e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin } 25373e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin 25473e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin public static boolean equals(Object a, Object b) { 25573e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin return (a == b) || (a == null ? false : a.equals(b)); 25673e782de608cbe2ddffd75c055009ff2e208f78bOwen Lin } 2574de149ceb47f2c251f646419907424bfb67d2b64Owen Lin 2584de149ceb47f2c251f646419907424bfb67d2b64Owen Lin public static boolean isPowerOf2(int n) { 2594de149ceb47f2c251f646419907424bfb67d2b64Owen Lin return (n & -n) == n; 2604de149ceb47f2c251f646419907424bfb67d2b64Owen Lin } 2614de149ceb47f2c251f646419907424bfb67d2b64Owen Lin 2624de149ceb47f2c251f646419907424bfb67d2b64Owen Lin public static int nextPowerOf2(int n) { 2634de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n -= 1; 2644de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 16; 2654de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 8; 2664de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 4; 2674de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 2; 2684de149ceb47f2c251f646419907424bfb67d2b64Owen Lin n |= n >>> 1; 2694de149ceb47f2c251f646419907424bfb67d2b64Owen Lin return n + 1; 2704de149ceb47f2c251f646419907424bfb67d2b64Owen Lin } 27133be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin 27233be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin public static float distance(float x, float y, float sx, float sy) { 27333be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin float dx = x - sx; 27433be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin float dy = y - sy; 27533be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin return (float) Math.sqrt(dx * dx + dy * dy); 27633be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin } 27733be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin 27833be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin public static int clamp(int x, int min, int max) { 27933be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin if (x > max) return max; 28033be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin if (x < min) return min; 28133be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin return x; 28233be45a1abaf6a8d611fb87b18945c84ab76c229Owen Lin } 283ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang 2844aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li public static int getDisplayRotation(Activity activity) { 285ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang int rotation = activity.getWindowManager().getDefaultDisplay() 286ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang .getRotation(); 287ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang switch (rotation) { 2884aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li case Surface.ROTATION_0: return 0; 2894aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li case Surface.ROTATION_90: return 90; 2904aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li case Surface.ROTATION_180: return 180; 2914aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li case Surface.ROTATION_270: return 270; 292ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang } 2934aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li return 0; 2944aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li } 295ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang 2964aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li public static void setCameraDisplayOrientation(Activity activity, 297c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li int cameraId, Camera camera) { 298c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li // See android.hardware.Camera.setCameraDisplayOrientation for 299c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li // documentation. 300c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li Camera.CameraInfo info = new Camera.CameraInfo(); 301c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li Camera.getCameraInfo(cameraId, info); 3024aaa2130af7241f128ee561cafd17a4fb560b92cWu-cheng Li int degrees = getDisplayRotation(activity); 303c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li int result; 304c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 305c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li result = (info.orientation + degrees) % 360; 306c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li result = (360 - result) % 360; // compensate the mirror 307c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li } else { // back-facing 308c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li result = (info.orientation - degrees + 360) % 360; 309c1dd72054122befb49aa1ca11ffa589b00186f80Wu-cheng Li } 310ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang camera.setDisplayOrientation(result); 311ac9d0a1ce538eb4bd50cba3b257737a05b9ac4e5Chih-Chung Chang } 312101d528d59f447847d5c6b7578642132c2b76f4fOwen Lin} 313