Util.java revision db0757dc9c627e7c5206104664028e386ade7d03
1819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott/* 2819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * Copyright (C) 2009 The Android Open Source Project 3819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * 4819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * Licensed under the Apache License, Version 2.0 (the "License"); 5819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * you may not use this file except in compliance with the License. 6819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * You may obtain a copy of the License at 7819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * 8819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * http://www.apache.org/licenses/LICENSE-2.0 9819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * 10819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * Unless required by applicable law or agreed to in writing, software 11819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * distributed under the License is distributed on an "AS IS" BASIS, 12819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * See the License for the specific language governing permissions and 14819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * limitations under the License. 15819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott */ 16819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 17819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottpackage com.android.camera; 18819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 1973b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerottimport android.app.Activity; 20819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.app.AlertDialog; 21819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.content.Context; 22819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.content.DialogInterface; 23819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.graphics.Bitmap; 24819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.graphics.BitmapFactory; 25819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.graphics.Matrix; 26819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.hardware.Camera; 27819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.hardware.Camera.Parameters; 28819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.hardware.Camera.Size; 2975895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerottimport android.telephony.TelephonyManager; 3069c182afb0e6d82a341a28b4317aa703af768906Gary Maiimport android.util.Log; 3169c182afb0e6d82a341a28b4317aa703af768906Gary Maiimport android.view.Display; 32819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.view.Surface; 33819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.view.View; 34819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.view.animation.Animation; 35819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport android.view.animation.TranslateAnimation; 36819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 37819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport java.io.Closeable; 38819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport java.lang.reflect.Method; 39819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport java.util.List; 40819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerottimport java.util.StringTokenizer; 41819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 42819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott/** 43819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * Collection of utility functions used in this package. 4473b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott */ 4573b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerottpublic class Util { 46819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott private static final String TAG = "Util"; 47819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static final int DIRECTION_LEFT = 0; 48819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static final int DIRECTION_RIGHT = 1; 49819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static final int DIRECTION_UP = 2; 50819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static final int DIRECTION_DOWN = 3; 51819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 52819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static final String REVIEW_ACTION = "com.android.camera.action.REVIEW"; 53819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 54819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott // Private intent extras. Test only. 55819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static final String EXTRAS_CAMERA_FACING = 56819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott "android.intent.extras.CAMERA_FACING"; 57819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 5875895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott private Util() { 59819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 60819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 61819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott // Rotates the bitmap by the specified degree. 62819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott // If a new bitmap is created, the original bitmap is recycled. 63819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static Bitmap rotate(Bitmap b, int degrees) { 64819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott return rotateAndMirror(b, degrees, false); 65819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 66819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 67819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott // Rotates and/or mirrors the bitmap. If a new bitmap is created, the 68819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott // original bitmap is recycled. 69819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static Bitmap rotateAndMirror(Bitmap b, int degrees, boolean mirror) { 70819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott if ((degrees != 0 || mirror) && b != null) { 71819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott Matrix m = new Matrix(); 72819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott m.setRotate(degrees, 73819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott (float) b.getWidth() / 2, (float) b.getHeight() / 2); 74819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott if (mirror) { 75819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott m.postScale(-1, 1); 76819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott degrees = (degrees + 360) % 360; 777217e6986c333aebb885b0a07a0a9344ef7a814cMarcus Hagerott if (degrees == 0 || degrees == 180) { 787217e6986c333aebb885b0a07a0a9344ef7a814cMarcus Hagerott m.postTranslate((float) b.getWidth(), 0); 79819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } else if (degrees == 90 || degrees == 270) { 80819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott m.postTranslate((float) b.getHeight(), 0); 81819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } else { 82819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott throw new IllegalArgumentException("Invalid degrees=" + degrees); 83819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 84819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 85819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 86819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott try { 87819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott Bitmap b2 = Bitmap.createBitmap( 88819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott b, 0, 0, b.getWidth(), b.getHeight(), m, true); 89819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott if (b != b2) { 90819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott b.recycle(); 91819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott b = b2; 92819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 93819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } catch (OutOfMemoryError ex) { 94819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott // We have no memory to rotate. Return the original bitmap. 95819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 96819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 97819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott return b; 98819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 99819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 10075895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott /* 101e7a71cbbe8929a9d8a7ca0a3b5668646d49a611aMarcus Hagerott * Compute the sample size as a function of minSideLength 102a181ca6021333cbb96ff9a6abeec9e64ea19c7f9Marcus Hagerott * and maxNumOfPixels. 103a181ca6021333cbb96ff9a6abeec9e64ea19c7f9Marcus Hagerott * minSideLength is used to specify that minimal width or height of a 104a181ca6021333cbb96ff9a6abeec9e64ea19c7f9Marcus Hagerott * bitmap. 10575895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott * maxNumOfPixels is used to specify the maximal size in pixels that is 106e7a71cbbe8929a9d8a7ca0a3b5668646d49a611aMarcus Hagerott * tolerable in terms of memory usage. 107e7a71cbbe8929a9d8a7ca0a3b5668646d49a611aMarcus Hagerott * 108e7a71cbbe8929a9d8a7ca0a3b5668646d49a611aMarcus Hagerott * The function returns a sample size based on the constraints. 109e7a71cbbe8929a9d8a7ca0a3b5668646d49a611aMarcus Hagerott * Both size and minSideLength can be passed in as -1 110e7a71cbbe8929a9d8a7ca0a3b5668646d49a611aMarcus Hagerott * which indicates no care of the corresponding constraint. 111819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * The functions prefers returning a sample size that 11275895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott * generates a smaller bitmap, unless minSideLength = -1. 113819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * 114819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott * Also, the function rounds up the sample size to a power of 2 or multiple 11573b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott * of 8 because BitmapFactory only honors sample size this way. 11673b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott * For example, BitmapFactory downsamples an image by 2 even though the 11773b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott * request is 3. So we round up the sample size to avoid OOM. 11873b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott */ 11973b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott public static int computeSampleSize(BitmapFactory.Options options, 12073b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott int minSideLength, int maxNumOfPixels) { 12173b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott int initialSize = computeInitialSampleSize(options, minSideLength, 12273b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott maxNumOfPixels); 12373b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott 12473b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott int roundedSize; 12573b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott if (initialSize <= 8) { 12673b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott roundedSize = 1; 127819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott while (roundedSize < initialSize) { 128819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott roundedSize <<= 1; 129819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 130e7a71cbbe8929a9d8a7ca0a3b5668646d49a611aMarcus Hagerott } else { 131819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott roundedSize = (initialSize + 7) / 8 * 8; 13275895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott } 133819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 134c2093f312f71e730e1cc4daaa305782fda394215Marcus Hagerott return roundedSize; 135819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 136819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 137819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott private static int computeInitialSampleSize(BitmapFactory.Options options, 138819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott int minSideLength, int maxNumOfPixels) { 139819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott double w = options.outWidth; 140819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott double h = options.outHeight; 141819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 142819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott int lowerBound = (maxNumOfPixels < 0) ? 1 : 143819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels)); 144819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott int upperBound = (minSideLength < 0) ? 128 : 145819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott (int) Math.min(Math.floor(w / minSideLength), 146819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott Math.floor(h / minSideLength)); 147819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 148819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott if (upperBound < lowerBound) { 149819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott // return the larger one when there is no overlapping zone. 1507217e6986c333aebb885b0a07a0a9344ef7a814cMarcus Hagerott return lowerBound; 1517217e6986c333aebb885b0a07a0a9344ef7a814cMarcus Hagerott } 1527217e6986c333aebb885b0a07a0a9344ef7a814cMarcus Hagerott 153819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott if (maxNumOfPixels < 0 && minSideLength < 0) { 15475895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott return 1; 15575895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott } else if (minSideLength < 0) { 156819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott return lowerBound; 15775895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott } else { 158819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott return upperBound; 159819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 160819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 161819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 162819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static Bitmap makeBitmap(byte[] jpegData, int maxNumOfPixels) { 163819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott try { 164819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott BitmapFactory.Options options = new BitmapFactory.Options(); 165819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott options.inJustDecodeBounds = true; 166819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, 167819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott options); 168819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott if (options.mCancel || options.outWidth == -1 16973b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott || options.outHeight == -1) { 170819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott return null; 171819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 172819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott options.inSampleSize = computeSampleSize( 173819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott options, -1, maxNumOfPixels); 174819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott options.inJustDecodeBounds = false; 17573b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott 17673b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott options.inDither = false; 17773b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott options.inPreferredConfig = Bitmap.Config.ARGB_8888; 178c2093f312f71e730e1cc4daaa305782fda394215Marcus Hagerott return BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, 17973b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott options); 18073b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott } catch (OutOfMemoryError ex) { 18173b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott Log.e(TAG, "Got oom exception ", ex); 18273b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott return null; 18373b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott } 18473b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott } 18573b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott 18673b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott public static void closeSilently(Closeable c) { 18773b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott if (c == null) return; 18873b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott try { 18973b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott c.close(); 19073b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott } catch (Throwable t) { 191d3869c7ab4ff85fc9e3a511ea6644be395698321Marcus Hagerott // do nothing 192d3869c7ab4ff85fc9e3a511ea6644be395698321Marcus Hagerott } 193d3869c7ab4ff85fc9e3a511ea6644be395698321Marcus Hagerott } 19473b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott 19573b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott public static void Assert(boolean cond) { 19673b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott if (!cond) { 19773b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott throw new AssertionError(); 19873b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott } 19973b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott } 20073b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott 20173b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott public static void showFatalErrorAndFinish( 20273b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott final Activity activity, String title, String message) { 20373b283f03cd2697ad0098711d62cd0956037952fMarcus Hagerott DialogInterface.OnClickListener buttonListener = 204819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott new DialogInterface.OnClickListener() { 205819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public void onClick(DialogInterface dialog, int which) { 206819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott activity.finish(); 207819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott } 2084b11232fdf9e11e73b2ffa41b40f3e153ec3912bMarcus Hagerott }; 2094b11232fdf9e11e73b2ffa41b40f3e153ec3912bMarcus Hagerott new AlertDialog.Builder(activity) 2104b11232fdf9e11e73b2ffa41b40f3e153ec3912bMarcus Hagerott .setCancelable(false) 211819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott .setIconAttribute(android.R.attr.alertDialogIcon) 212819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott .setTitle(title) 213819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott .setMessage(message) 21475895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott .setNeutralButton(R.string.details_ok, buttonListener) 21575895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott .show(); 21675895e73379aa26a3d4135c772af4ecb8a79b4c9Marcus Hagerott } 217819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott 218819214d472fdadf3d69cb4580e238506194ed30eMarcus Hagerott public static Animation slideOut(View view, int to) { 219 view.setVisibility(View.INVISIBLE); 220 Animation anim; 221 switch (to) { 222 case DIRECTION_LEFT: 223 anim = new TranslateAnimation(0, -view.getWidth(), 0, 0); 224 break; 225 case DIRECTION_RIGHT: 226 anim = new TranslateAnimation(0, view.getWidth(), 0, 0); 227 break; 228 case DIRECTION_UP: 229 anim = new TranslateAnimation(0, 0, 0, -view.getHeight()); 230 break; 231 case DIRECTION_DOWN: 232 anim = new TranslateAnimation(0, 0, 0, view.getHeight()); 233 break; 234 default: 235 throw new IllegalArgumentException(Integer.toString(to)); 236 } 237 anim.setDuration(500); 238 view.startAnimation(anim); 239 return anim; 240 } 241 242 public static Animation slideIn(View view, int from) { 243 view.setVisibility(View.VISIBLE); 244 Animation anim; 245 switch (from) { 246 case DIRECTION_LEFT: 247 anim = new TranslateAnimation(-view.getWidth(), 0, 0, 0); 248 break; 249 case DIRECTION_RIGHT: 250 anim = new TranslateAnimation(view.getWidth(), 0, 0, 0); 251 break; 252 case DIRECTION_UP: 253 anim = new TranslateAnimation(0, 0, -view.getHeight(), 0); 254 break; 255 case DIRECTION_DOWN: 256 anim = new TranslateAnimation(0, 0, view.getHeight(), 0); 257 break; 258 default: 259 throw new IllegalArgumentException(Integer.toString(from)); 260 } 261 anim.setDuration(500); 262 view.startAnimation(anim); 263 return anim; 264 } 265 266 public static <T> T checkNotNull(T object) { 267 if (object == null) throw new NullPointerException(); 268 return object; 269 } 270 271 public static boolean equals(Object a, Object b) { 272 return (a == b) || (a == null ? false : a.equals(b)); 273 } 274 275 public static boolean isPowerOf2(int n) { 276 return (n & -n) == n; 277 } 278 279 public static int nextPowerOf2(int n) { 280 n -= 1; 281 n |= n >>> 16; 282 n |= n >>> 8; 283 n |= n >>> 4; 284 n |= n >>> 2; 285 n |= n >>> 1; 286 return n + 1; 287 } 288 289 public static float distance(float x, float y, float sx, float sy) { 290 float dx = x - sx; 291 float dy = y - sy; 292 return (float) Math.sqrt(dx * dx + dy * dy); 293 } 294 295 public static int clamp(int x, int min, int max) { 296 if (x > max) return max; 297 if (x < min) return min; 298 return x; 299 } 300 301 public static int getDisplayRotation(Activity activity) { 302 int rotation = activity.getWindowManager().getDefaultDisplay() 303 .getRotation(); 304 switch (rotation) { 305 case Surface.ROTATION_0: return 0; 306 case Surface.ROTATION_90: return 90; 307 case Surface.ROTATION_180: return 180; 308 case Surface.ROTATION_270: return 270; 309 } 310 return 0; 311 } 312 313 public static void setCameraDisplayOrientation(Activity activity, 314 int cameraId, Camera camera) { 315 // See android.hardware.Camera.setCameraDisplayOrientation for 316 // documentation. 317 Camera.CameraInfo info = new Camera.CameraInfo(); 318 Camera.getCameraInfo(cameraId, info); 319 int degrees = getDisplayRotation(activity); 320 int result; 321 if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 322 result = (info.orientation + degrees) % 360; 323 result = (360 - result) % 360; // compensate the mirror 324 } else { // back-facing 325 result = (info.orientation - degrees + 360) % 360; 326 } 327 camera.setDisplayOrientation(result); 328 } 329 330 public static Size getOptimalPreviewSize(Activity currentActivity, 331 List<Size> sizes, double targetRatio) { 332 // Use a very small tolerance because we want an exact match. 333 final double ASPECT_TOLERANCE = 0.001; 334 if (sizes == null) return null; 335 336 Size optimalSize = null; 337 double minDiff = Double.MAX_VALUE; 338 339 // Because of bugs of overlay and layout, we sometimes will try to 340 // layout the viewfinder in the portrait orientation and thus get the 341 // wrong size of mSurfaceView. When we change the preview size, the 342 // new overlay will be created before the old one closed, which causes 343 // an exception. For now, just get the screen size 344 345 Display display = currentActivity.getWindowManager().getDefaultDisplay(); 346 int targetHeight = Math.min(display.getHeight(), display.getWidth()); 347 348 if (targetHeight <= 0) { 349 // We don't know the size of SurfaceView, use screen height 350 targetHeight = display.getHeight(); 351 } 352 353 // Try to find an size match aspect ratio and size 354 for (Size size : sizes) { 355 double ratio = (double) size.width / size.height; 356 if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue; 357 if (Math.abs(size.height - targetHeight) < minDiff) { 358 optimalSize = size; 359 minDiff = Math.abs(size.height - targetHeight); 360 } 361 } 362 363 // Cannot find the one match the aspect ratio. This should not happen. 364 // Ignore the requirement. 365 if (optimalSize == null) { 366 Log.w(TAG, "No preview size match the aspect ratio"); 367 minDiff = Double.MAX_VALUE; 368 for (Size size : sizes) { 369 if (Math.abs(size.height - targetHeight) < minDiff) { 370 optimalSize = size; 371 minDiff = Math.abs(size.height - targetHeight); 372 } 373 } 374 } 375 return optimalSize; 376 } 377 378 public static void dumpParameters(Parameters parameters) { 379 String flattened = parameters.flatten(); 380 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 381 Log.d(TAG, "Dump all camera parameters:"); 382 while (tokenizer.hasMoreElements()) { 383 Log.d(TAG, tokenizer.nextToken()); 384 } 385 } 386 387 /** 388 * Returns whether the device is voice-capable (meaning, it can do MMS). 389 */ 390 public static boolean isMmsCapable(Context context) { 391 TelephonyManager telephonyManager = (TelephonyManager) 392 context.getSystemService(Context.TELEPHONY_SERVICE); 393 if (telephonyManager == null) { 394 return false; 395 } 396 397 try { 398 Class partypes[] = new Class[0]; 399 Method sIsVoiceCapable = TelephonyManager.class.getMethod( 400 "isVoiceCapable", partypes); 401 402 Object arglist[] = new Object[0]; 403 Object retobj = sIsVoiceCapable.invoke(telephonyManager, arglist); 404 return (Boolean) retobj; 405 } catch (java.lang.reflect.InvocationTargetException ite) { 406 // Failure, must be another device. 407 // Assume that it is voice capable. 408 } catch (java.lang.IllegalAccessException iae) { 409 // Failure, must be an other device. 410 // Assume that it is voice capable. 411 } catch (NoSuchMethodException nsme) { 412 } 413 return true; 414 } 415 416 // This is for test only. Allow the camera to launch the specific camera. 417 public static int getCameraFacingIntentExtras(Activity currentActivity) { 418 int cameraId = -1; 419 420 int intentCameraId = 421 currentActivity.getIntent().getIntExtra(Util.EXTRAS_CAMERA_FACING, -1); 422 423 if (isFrontCameraIntent(intentCameraId)) { 424 // Check if the front camera exist 425 int frontCameraId = CameraHolder.instance().getFrontCameraId(); 426 if (frontCameraId != -1) { 427 cameraId = frontCameraId; 428 } 429 } else if (isBackCameraIntent(intentCameraId)) { 430 // Check if the back camera exist 431 int backCameraId = CameraHolder.instance().getBackCameraId(); 432 if (backCameraId != -1) { 433 cameraId = backCameraId; 434 } 435 } 436 return cameraId; 437 } 438 439 private static boolean isFrontCameraIntent(int intentCameraId) { 440 return (intentCameraId == android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT); 441 } 442 443 private static boolean isBackCameraIntent(int intentCameraId) { 444 return (intentCameraId == android.hardware.Camera.CameraInfo.CAMERA_FACING_BACK); 445 } 446 447} 448