1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.camera.util; 18 19 import android.app.Activity; 20 import android.app.AlertDialog; 21 import android.app.admin.DevicePolicyManager; 22 import android.content.ActivityNotFoundException; 23 import android.content.ComponentName; 24 import android.content.ContentResolver; 25 import android.content.Context; 26 import android.content.DialogInterface; 27 import android.content.Intent; 28 import android.graphics.Bitmap; 29 import android.graphics.BitmapFactory; 30 import android.graphics.Matrix; 31 import android.graphics.Point; 32 import android.graphics.Rect; 33 import android.graphics.RectF; 34 import android.hardware.Camera; 35 import android.hardware.Camera.CameraInfo; 36 import android.hardware.Camera.Parameters; 37 import android.hardware.Camera.Size; 38 import android.location.Location; 39 import android.net.Uri; 40 import android.os.Handler; 41 import android.os.ParcelFileDescriptor; 42 import android.telephony.TelephonyManager; 43 import android.util.DisplayMetrics; 44 import android.util.Log; 45 import android.util.TypedValue; 46 import android.view.Display; 47 import android.view.OrientationEventListener; 48 import android.view.Surface; 49 import android.view.View; 50 import android.view.WindowManager; 51 import android.view.animation.AlphaAnimation; 52 import android.view.animation.Animation; 53 import android.widget.Toast; 54 55 import com.android.camera.CameraActivity; 56 import com.android.camera.CameraDisabledException; 57 import com.android.camera.CameraHolder; 58 import com.android.camera.CameraManager; 59 import com.android.camera.util.IntentHelper; 60 import com.android.camera2.R; 61 62 import java.io.Closeable; 63 import java.io.IOException; 64 import java.lang.reflect.Method; 65 import java.text.SimpleDateFormat; 66 import java.util.Date; 67 import java.util.List; 68 import java.util.Locale; 69 import java.util.StringTokenizer; 70 71 /** 72 * Collection of utility functions used in this package. 73 */ 74 public class CameraUtil { 75 private static final String TAG = "Util"; 76 77 // For calculate the best fps range for still image capture. 78 private final static int MAX_PREVIEW_FPS_TIMES_1000 = 400000; 79 private final static int PREFERRED_PREVIEW_FPS_TIMES_1000 = 30000; 80 81 // For creating crop intents. 82 public static final String KEY_RETURN_DATA = "return-data"; 83 public static final String KEY_SHOW_WHEN_LOCKED = "showWhenLocked"; 84 85 // Orientation hysteresis amount used in rounding, in degrees 86 public static final int ORIENTATION_HYSTERESIS = 5; 87 88 public static final String REVIEW_ACTION = "com.android.camera.action.REVIEW"; 89 // See android.hardware.Camera.ACTION_NEW_PICTURE. 90 public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; 91 // See android.hardware.Camera.ACTION_NEW_VIDEO. 92 public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; 93 94 // Broadcast Action: The camera application has become active in picture-taking mode. 95 public static final String ACTION_CAMERA_STARTED = "com.android.camera.action.CAMERA_STARTED"; 96 // Broadcast Action: The camera application is no longer in active picture-taking mode. 97 public static final String ACTION_CAMERA_STOPPED = "com.android.camera.action.CAMERA_STOPPED"; 98 // When the camera application is active in picture-taking mode, it listens for this intent, 99 // which upon receipt will trigger the shutter to capture a new picture, as if the user had 100 // pressed the shutter button. 101 public static final String ACTION_CAMERA_SHUTTER_CLICK = 102 "com.android.camera.action.SHUTTER_CLICK"; 103 104 // Fields from android.hardware.Camera.Parameters 105 public static final String FOCUS_MODE_CONTINUOUS_PICTURE = "continuous-picture"; 106 public static final String RECORDING_HINT = "recording-hint"; 107 private static final String AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 108 private static final String AUTO_WHITE_BALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 109 private static final String VIDEO_SNAPSHOT_SUPPORTED = "video-snapshot-supported"; 110 public static final String SCENE_MODE_HDR = "hdr"; 111 public static final String TRUE = "true"; 112 public static final String FALSE = "false"; 113 114 // Fields for the show-on-maps-functionality 115 private static final String MAPS_PACKAGE_NAME = "com.google.android.apps.maps"; 116 private static final String MAPS_CLASS_NAME = "com.google.android.maps.MapsActivity"; 117 118 /** Has to be in sync with the receiving MovieActivity. */ 119 public static final String KEY_TREAT_UP_AS_BACK = "treat-up-as-back"; 120 121 public static boolean isSupported(String value, List<String> supported) { 122 return supported == null ? false : supported.indexOf(value) >= 0; 123 } 124 125 public static boolean isAutoExposureLockSupported(Parameters params) { 126 return TRUE.equals(params.get(AUTO_EXPOSURE_LOCK_SUPPORTED)); 127 } 128 129 public static boolean isAutoWhiteBalanceLockSupported(Parameters params) { 130 return TRUE.equals(params.get(AUTO_WHITE_BALANCE_LOCK_SUPPORTED)); 131 } 132 133 public static boolean isVideoSnapshotSupported(Parameters params) { 134 return TRUE.equals(params.get(VIDEO_SNAPSHOT_SUPPORTED)); 135 } 136 137 public static boolean isCameraHdrSupported(Parameters params) { 138 List<String> supported = params.getSupportedSceneModes(); 139 return (supported != null) && supported.contains(SCENE_MODE_HDR); 140 } 141 142 public static boolean isMeteringAreaSupported(Parameters params) { 143 return params.getMaxNumMeteringAreas() > 0; 144 } 145 146 public static boolean isFocusAreaSupported(Parameters params) { 147 return (params.getMaxNumFocusAreas() > 0 148 && isSupported(Parameters.FOCUS_MODE_AUTO, 149 params.getSupportedFocusModes())); 150 } 151 152 // Private intent extras. Test only. 153 private static final String EXTRAS_CAMERA_FACING = 154 "android.intent.extras.CAMERA_FACING"; 155 156 private static float sPixelDensity = 1; 157 private static ImageFileNamer sImageFileNamer; 158 159 private CameraUtil() { 160 } 161 162 public static void initialize(Context context) { 163 DisplayMetrics metrics = new DisplayMetrics(); 164 WindowManager wm = (WindowManager) 165 context.getSystemService(Context.WINDOW_SERVICE); 166 wm.getDefaultDisplay().getMetrics(metrics); 167 sPixelDensity = metrics.density; 168 sImageFileNamer = new ImageFileNamer( 169 context.getString(R.string.image_file_name_format)); 170 } 171 172 public static int dpToPixel(int dp) { 173 return Math.round(sPixelDensity * dp); 174 } 175 176 // Rotates the bitmap by the specified degree. 177 // If a new bitmap is created, the original bitmap is recycled. 178 public static Bitmap rotate(Bitmap b, int degrees) { 179 return rotateAndMirror(b, degrees, false); 180 } 181 182 // Rotates and/or mirrors the bitmap. If a new bitmap is created, the 183 // original bitmap is recycled. 184 public static Bitmap rotateAndMirror(Bitmap b, int degrees, boolean mirror) { 185 if ((degrees != 0 || mirror) && b != null) { 186 Matrix m = new Matrix(); 187 // Mirror first. 188 // horizontal flip + rotation = -rotation + horizontal flip 189 if (mirror) { 190 m.postScale(-1, 1); 191 degrees = (degrees + 360) % 360; 192 if (degrees == 0 || degrees == 180) { 193 m.postTranslate(b.getWidth(), 0); 194 } else if (degrees == 90 || degrees == 270) { 195 m.postTranslate(b.getHeight(), 0); 196 } else { 197 throw new IllegalArgumentException("Invalid degrees=" + degrees); 198 } 199 } 200 if (degrees != 0) { 201 // clockwise 202 m.postRotate(degrees, 203 (float) b.getWidth() / 2, (float) b.getHeight() / 2); 204 } 205 206 try { 207 Bitmap b2 = Bitmap.createBitmap( 208 b, 0, 0, b.getWidth(), b.getHeight(), m, true); 209 if (b != b2) { 210 b.recycle(); 211 b = b2; 212 } 213 } catch (OutOfMemoryError ex) { 214 // We have no memory to rotate. Return the original bitmap. 215 } 216 } 217 return b; 218 } 219 220 /* 221 * Compute the sample size as a function of minSideLength 222 * and maxNumOfPixels. 223 * minSideLength is used to specify that minimal width or height of a 224 * bitmap. 225 * maxNumOfPixels is used to specify the maximal size in pixels that is 226 * tolerable in terms of memory usage. 227 * 228 * The function returns a sample size based on the constraints. 229 * Both size and minSideLength can be passed in as -1 230 * which indicates no care of the corresponding constraint. 231 * The functions prefers returning a sample size that 232 * generates a smaller bitmap, unless minSideLength = -1. 233 * 234 * Also, the function rounds up the sample size to a power of 2 or multiple 235 * of 8 because BitmapFactory only honors sample size this way. 236 * For example, BitmapFactory downsamples an image by 2 even though the 237 * request is 3. So we round up the sample size to avoid OOM. 238 */ 239 public static int computeSampleSize(BitmapFactory.Options options, 240 int minSideLength, int maxNumOfPixels) { 241 int initialSize = computeInitialSampleSize(options, minSideLength, 242 maxNumOfPixels); 243 244 int roundedSize; 245 if (initialSize <= 8) { 246 roundedSize = 1; 247 while (roundedSize < initialSize) { 248 roundedSize <<= 1; 249 } 250 } else { 251 roundedSize = (initialSize + 7) / 8 * 8; 252 } 253 254 return roundedSize; 255 } 256 257 private static int computeInitialSampleSize(BitmapFactory.Options options, 258 int minSideLength, int maxNumOfPixels) { 259 double w = options.outWidth; 260 double h = options.outHeight; 261 262 int lowerBound = (maxNumOfPixels < 0) ? 1 : 263 (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels)); 264 int upperBound = (minSideLength < 0) ? 128 : 265 (int) Math.min(Math.floor(w / minSideLength), 266 Math.floor(h / minSideLength)); 267 268 if (upperBound < lowerBound) { 269 // return the larger one when there is no overlapping zone. 270 return lowerBound; 271 } 272 273 if (maxNumOfPixels < 0 && minSideLength < 0) { 274 return 1; 275 } else if (minSideLength < 0) { 276 return lowerBound; 277 } else { 278 return upperBound; 279 } 280 } 281 282 public static Bitmap makeBitmap(byte[] jpegData, int maxNumOfPixels) { 283 try { 284 BitmapFactory.Options options = new BitmapFactory.Options(); 285 options.inJustDecodeBounds = true; 286 BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, 287 options); 288 if (options.mCancel || options.outWidth == -1 289 || options.outHeight == -1) { 290 return null; 291 } 292 options.inSampleSize = computeSampleSize( 293 options, -1, maxNumOfPixels); 294 options.inJustDecodeBounds = false; 295 296 options.inDither = false; 297 options.inPreferredConfig = Bitmap.Config.ARGB_8888; 298 return BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, 299 options); 300 } catch (OutOfMemoryError ex) { 301 Log.e(TAG, "Got oom exception ", ex); 302 return null; 303 } 304 } 305 306 public static void closeSilently(Closeable c) { 307 if (c == null) return; 308 try { 309 c.close(); 310 } catch (Throwable t) { 311 // do nothing 312 } 313 } 314 315 public static void Assert(boolean cond) { 316 if (!cond) { 317 throw new AssertionError(); 318 } 319 } 320 321 private static void throwIfCameraDisabled(Activity activity) throws CameraDisabledException { 322 // Check if device policy has disabled the camera. 323 DevicePolicyManager dpm = (DevicePolicyManager) activity.getSystemService( 324 Context.DEVICE_POLICY_SERVICE); 325 if (dpm.getCameraDisabled(null)) { 326 throw new CameraDisabledException(); 327 } 328 } 329 330 public static CameraManager.CameraProxy openCamera( 331 Activity activity, final int cameraId, 332 Handler handler, final CameraManager.CameraOpenErrorCallback cb) { 333 try { 334 throwIfCameraDisabled(activity); 335 return CameraHolder.instance().open(handler, cameraId, cb); 336 } catch (CameraDisabledException ex) { 337 handler.post(new Runnable() { 338 @Override 339 public void run() { 340 cb.onCameraDisabled(cameraId); 341 } 342 }); 343 } 344 return null; 345 } 346 347 public static void showErrorAndFinish(final Activity activity, int msgId) { 348 DialogInterface.OnClickListener buttonListener = 349 new DialogInterface.OnClickListener() { 350 @Override 351 public void onClick(DialogInterface dialog, int which) { 352 activity.finish(); 353 } 354 }; 355 TypedValue out = new TypedValue(); 356 activity.getTheme().resolveAttribute(android.R.attr.alertDialogIcon, out, true); 357 new AlertDialog.Builder(activity) 358 .setCancelable(false) 359 .setTitle(R.string.camera_error_title) 360 .setMessage(msgId) 361 .setNeutralButton(R.string.dialog_ok, buttonListener) 362 .setIcon(out.resourceId) 363 .show(); 364 } 365 366 public static <T> T checkNotNull(T object) { 367 if (object == null) throw new NullPointerException(); 368 return object; 369 } 370 371 public static boolean equals(Object a, Object b) { 372 return (a == b) || (a == null ? false : a.equals(b)); 373 } 374 375 public static int nextPowerOf2(int n) { 376 n -= 1; 377 n |= n >>> 16; 378 n |= n >>> 8; 379 n |= n >>> 4; 380 n |= n >>> 2; 381 n |= n >>> 1; 382 return n + 1; 383 } 384 385 public static float distance(float x, float y, float sx, float sy) { 386 float dx = x - sx; 387 float dy = y - sy; 388 return (float) Math.sqrt(dx * dx + dy * dy); 389 } 390 391 public static int clamp(int x, int min, int max) { 392 if (x > max) return max; 393 if (x < min) return min; 394 return x; 395 } 396 397 public static float clamp(float x, float min, float max) { 398 if (x > max) return max; 399 if (x < min) return min; 400 return x; 401 } 402 403 public static int getDisplayRotation(Activity activity) { 404 int rotation = activity.getWindowManager().getDefaultDisplay() 405 .getRotation(); 406 switch (rotation) { 407 case Surface.ROTATION_0: return 0; 408 case Surface.ROTATION_90: return 90; 409 case Surface.ROTATION_180: return 180; 410 case Surface.ROTATION_270: return 270; 411 } 412 return 0; 413 } 414 415 /** 416 * Calculate the default orientation of the device based on the width and 417 * height of the display when rotation = 0 (i.e. natural width and height) 418 * @param activity the activity context 419 * @return whether the default orientation of the device is portrait 420 */ 421 public static boolean isDefaultToPortrait(Activity activity) { 422 Display currentDisplay = activity.getWindowManager().getDefaultDisplay(); 423 Point displaySize = new Point(); 424 currentDisplay.getSize(displaySize); 425 int orientation = currentDisplay.getRotation(); 426 int naturalWidth, naturalHeight; 427 if (orientation == Surface.ROTATION_0 || orientation == Surface.ROTATION_180) { 428 naturalWidth = displaySize.x; 429 naturalHeight = displaySize.y; 430 } else { 431 naturalWidth = displaySize.y; 432 naturalHeight = displaySize.x; 433 } 434 return naturalWidth < naturalHeight; 435 } 436 437 public static int getDisplayOrientation(int degrees, int cameraId) { 438 // See android.hardware.Camera.setDisplayOrientation for 439 // documentation. 440 Camera.CameraInfo info = new Camera.CameraInfo(); 441 Camera.getCameraInfo(cameraId, info); 442 int result; 443 if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 444 result = (info.orientation + degrees) % 360; 445 result = (360 - result) % 360; // compensate the mirror 446 } else { // back-facing 447 result = (info.orientation - degrees + 360) % 360; 448 } 449 return result; 450 } 451 452 public static int getCameraOrientation(int cameraId) { 453 Camera.CameraInfo info = new Camera.CameraInfo(); 454 Camera.getCameraInfo(cameraId, info); 455 return info.orientation; 456 } 457 458 public static int roundOrientation(int orientation, int orientationHistory) { 459 boolean changeOrientation = false; 460 if (orientationHistory == OrientationEventListener.ORIENTATION_UNKNOWN) { 461 changeOrientation = true; 462 } else { 463 int dist = Math.abs(orientation - orientationHistory); 464 dist = Math.min( dist, 360 - dist ); 465 changeOrientation = ( dist >= 45 + ORIENTATION_HYSTERESIS ); 466 } 467 if (changeOrientation) { 468 return ((orientation + 45) / 90 * 90) % 360; 469 } 470 return orientationHistory; 471 } 472 473 private static Point getDefaultDisplaySize(Activity activity, Point size) { 474 activity.getWindowManager().getDefaultDisplay().getSize(size); 475 return size; 476 } 477 478 public static Size getOptimalPreviewSize(Activity currentActivity, 479 List<Size> sizes, double targetRatio) { 480 481 Point[] points = new Point[sizes.size()]; 482 483 int index = 0; 484 for (Size s : sizes) { 485 points[index++] = new Point(s.width, s.height); 486 } 487 488 int optimalPickIndex = getOptimalPreviewSize(currentActivity, points, targetRatio); 489 return (optimalPickIndex == -1) ? null : sizes.get(optimalPickIndex); 490 } 491 492 public static int getOptimalPreviewSize(Activity currentActivity, 493 Point[] sizes, double targetRatio) { 494 // Use a very small tolerance because we want an exact match. 495 final double ASPECT_TOLERANCE = 0.01; 496 if (sizes == null) return -1; 497 498 int optimalSizeIndex = -1; 499 double minDiff = Double.MAX_VALUE; 500 501 // Because of bugs of overlay and layout, we sometimes will try to 502 // layout the viewfinder in the portrait orientation and thus get the 503 // wrong size of preview surface. When we change the preview size, the 504 // new overlay will be created before the old one closed, which causes 505 // an exception. For now, just get the screen size. 506 Point point = getDefaultDisplaySize(currentActivity, new Point()); 507 int targetHeight = Math.min(point.x, point.y); 508 // Try to find an size match aspect ratio and size 509 for (int i = 0; i < sizes.length; i++) { 510 Point size = sizes[i]; 511 double ratio = (double) size.x / size.y; 512 if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue; 513 if (Math.abs(size.y - targetHeight) < minDiff) { 514 optimalSizeIndex = i; 515 minDiff = Math.abs(size.y - targetHeight); 516 } 517 } 518 // Cannot find the one match the aspect ratio. This should not happen. 519 // Ignore the requirement. 520 if (optimalSizeIndex == -1) { 521 Log.w(TAG, "No preview size match the aspect ratio"); 522 minDiff = Double.MAX_VALUE; 523 for (int i = 0; i < sizes.length; i++) { 524 Point size = sizes[i]; 525 if (Math.abs(size.y - targetHeight) < minDiff) { 526 optimalSizeIndex = i; 527 minDiff = Math.abs(size.y - targetHeight); 528 } 529 } 530 } 531 return optimalSizeIndex; 532 } 533 534 // Returns the largest picture size which matches the given aspect ratio. 535 public static Size getOptimalVideoSnapshotPictureSize( 536 List<Size> sizes, double targetRatio) { 537 // Use a very small tolerance because we want an exact match. 538 final double ASPECT_TOLERANCE = 0.001; 539 if (sizes == null) return null; 540 541 Size optimalSize = null; 542 543 // Try to find a size matches aspect ratio and has the largest width 544 for (Size size : sizes) { 545 double ratio = (double) size.width / size.height; 546 if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue; 547 if (optimalSize == null || size.width > optimalSize.width) { 548 optimalSize = size; 549 } 550 } 551 552 // Cannot find one that matches the aspect ratio. This should not happen. 553 // Ignore the requirement. 554 if (optimalSize == null) { 555 Log.w(TAG, "No picture size match the aspect ratio"); 556 for (Size size : sizes) { 557 if (optimalSize == null || size.width > optimalSize.width) { 558 optimalSize = size; 559 } 560 } 561 } 562 return optimalSize; 563 } 564 565 public static void dumpParameters(Parameters parameters) { 566 String flattened = parameters.flatten(); 567 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 568 Log.d(TAG, "Dump all camera parameters:"); 569 while (tokenizer.hasMoreElements()) { 570 Log.d(TAG, tokenizer.nextToken()); 571 } 572 } 573 574 /** 575 * Returns whether the device is voice-capable (meaning, it can do MMS). 576 */ 577 public static boolean isMmsCapable(Context context) { 578 TelephonyManager telephonyManager = (TelephonyManager) 579 context.getSystemService(Context.TELEPHONY_SERVICE); 580 if (telephonyManager == null) { 581 return false; 582 } 583 584 try { 585 Class<?> partypes[] = new Class[0]; 586 Method sIsVoiceCapable = TelephonyManager.class.getMethod( 587 "isVoiceCapable", partypes); 588 589 Object arglist[] = new Object[0]; 590 Object retobj = sIsVoiceCapable.invoke(telephonyManager, arglist); 591 return (Boolean) retobj; 592 } catch (java.lang.reflect.InvocationTargetException ite) { 593 // Failure, must be another device. 594 // Assume that it is voice capable. 595 } catch (IllegalAccessException iae) { 596 // Failure, must be an other device. 597 // Assume that it is voice capable. 598 } catch (NoSuchMethodException nsme) { 599 } 600 return true; 601 } 602 603 // This is for test only. Allow the camera to launch the specific camera. 604 public static int getCameraFacingIntentExtras(Activity currentActivity) { 605 int cameraId = -1; 606 607 int intentCameraId = 608 currentActivity.getIntent().getIntExtra(CameraUtil.EXTRAS_CAMERA_FACING, -1); 609 610 if (isFrontCameraIntent(intentCameraId)) { 611 // Check if the front camera exist 612 int frontCameraId = CameraHolder.instance().getFrontCameraId(); 613 if (frontCameraId != -1) { 614 cameraId = frontCameraId; 615 } 616 } else if (isBackCameraIntent(intentCameraId)) { 617 // Check if the back camera exist 618 int backCameraId = CameraHolder.instance().getBackCameraId(); 619 if (backCameraId != -1) { 620 cameraId = backCameraId; 621 } 622 } 623 return cameraId; 624 } 625 626 private static boolean isFrontCameraIntent(int intentCameraId) { 627 return (intentCameraId == android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT); 628 } 629 630 private static boolean isBackCameraIntent(int intentCameraId) { 631 return (intentCameraId == android.hardware.Camera.CameraInfo.CAMERA_FACING_BACK); 632 } 633 634 private static int sLocation[] = new int[2]; 635 636 // This method is not thread-safe. 637 public static boolean pointInView(float x, float y, View v) { 638 v.getLocationInWindow(sLocation); 639 return x >= sLocation[0] && x < (sLocation[0] + v.getWidth()) 640 && y >= sLocation[1] && y < (sLocation[1] + v.getHeight()); 641 } 642 643 public static int[] getRelativeLocation(View reference, View view) { 644 reference.getLocationInWindow(sLocation); 645 int referenceX = sLocation[0]; 646 int referenceY = sLocation[1]; 647 view.getLocationInWindow(sLocation); 648 sLocation[0] -= referenceX; 649 sLocation[1] -= referenceY; 650 return sLocation; 651 } 652 653 public static boolean isUriValid(Uri uri, ContentResolver resolver) { 654 if (uri == null) return false; 655 656 try { 657 ParcelFileDescriptor pfd = resolver.openFileDescriptor(uri, "r"); 658 if (pfd == null) { 659 Log.e(TAG, "Fail to open URI. URI=" + uri); 660 return false; 661 } 662 pfd.close(); 663 } catch (IOException ex) { 664 return false; 665 } 666 return true; 667 } 668 669 public static void dumpRect(RectF rect, String msg) { 670 Log.v(TAG, msg + "=(" + rect.left + "," + rect.top 671 + "," + rect.right + "," + rect.bottom + ")"); 672 } 673 674 public static void rectFToRect(RectF rectF, Rect rect) { 675 rect.left = Math.round(rectF.left); 676 rect.top = Math.round(rectF.top); 677 rect.right = Math.round(rectF.right); 678 rect.bottom = Math.round(rectF.bottom); 679 } 680 681 public static void prepareMatrix(Matrix matrix, boolean mirror, int displayOrientation, 682 int viewWidth, int viewHeight) { 683 // Need mirror for front camera. 684 matrix.setScale(mirror ? -1 : 1, 1); 685 // This is the value for android.hardware.Camera.setDisplayOrientation. 686 matrix.postRotate(displayOrientation); 687 // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). 688 // UI coordinates range from (0, 0) to (width, height). 689 matrix.postScale(viewWidth / 2000f, viewHeight / 2000f); 690 matrix.postTranslate(viewWidth / 2f, viewHeight / 2f); 691 } 692 693 public static String createJpegName(long dateTaken) { 694 synchronized (sImageFileNamer) { 695 return sImageFileNamer.generateName(dateTaken); 696 } 697 } 698 699 public static void broadcastNewPicture(Context context, Uri uri) { 700 context.sendBroadcast(new Intent(ACTION_NEW_PICTURE, uri)); 701 // Keep compatibility 702 context.sendBroadcast(new Intent("com.android.camera.NEW_PICTURE", uri)); 703 } 704 705 public static void fadeIn(View view, float startAlpha, float endAlpha, long duration) { 706 if (view.getVisibility() == View.VISIBLE) return; 707 708 view.setVisibility(View.VISIBLE); 709 Animation animation = new AlphaAnimation(startAlpha, endAlpha); 710 animation.setDuration(duration); 711 view.startAnimation(animation); 712 } 713 714 public static void fadeIn(View view) { 715 fadeIn(view, 0F, 1F, 400); 716 717 // We disabled the button in fadeOut(), so enable it here. 718 view.setEnabled(true); 719 } 720 721 public static void fadeOut(View view) { 722 if (view.getVisibility() != View.VISIBLE) return; 723 724 // Since the button is still clickable before fade-out animation 725 // ends, we disable the button first to block click. 726 view.setEnabled(false); 727 Animation animation = new AlphaAnimation(1F, 0F); 728 animation.setDuration(400); 729 view.startAnimation(animation); 730 view.setVisibility(View.GONE); 731 } 732 733 public static int getJpegRotation(int cameraId, int orientation) { 734 // See android.hardware.Camera.Parameters.setRotation for 735 // documentation. 736 int rotation = 0; 737 if (orientation != OrientationEventListener.ORIENTATION_UNKNOWN) { 738 CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId]; 739 if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 740 rotation = (info.orientation - orientation + 360) % 360; 741 } else { // back-facing camera 742 rotation = (info.orientation + orientation) % 360; 743 } 744 } 745 return rotation; 746 } 747 748 /** 749 * Down-samples a jpeg byte array. 750 * @param data a byte array of jpeg data 751 * @param downSampleFactor down-sample factor 752 * @return decoded and down-sampled bitmap 753 */ 754 public static Bitmap downSample(final byte[] data, int downSampleFactor) { 755 final BitmapFactory.Options opts = new BitmapFactory.Options(); 756 // Downsample the image 757 opts.inSampleSize = downSampleFactor; 758 return BitmapFactory.decodeByteArray(data, 0, data.length, opts); 759 } 760 761 public static void setGpsParameters(Parameters parameters, Location loc) { 762 // Clear previous GPS location from the parameters. 763 parameters.removeGpsData(); 764 765 // We always encode GpsTimeStamp 766 parameters.setGpsTimestamp(System.currentTimeMillis() / 1000); 767 768 // Set GPS location. 769 if (loc != null) { 770 double lat = loc.getLatitude(); 771 double lon = loc.getLongitude(); 772 boolean hasLatLon = (lat != 0.0d) || (lon != 0.0d); 773 774 if (hasLatLon) { 775 Log.d(TAG, "Set gps location"); 776 parameters.setGpsLatitude(lat); 777 parameters.setGpsLongitude(lon); 778 parameters.setGpsProcessingMethod(loc.getProvider().toUpperCase()); 779 if (loc.hasAltitude()) { 780 parameters.setGpsAltitude(loc.getAltitude()); 781 } else { 782 // for NETWORK_PROVIDER location provider, we may have 783 // no altitude information, but the driver needs it, so 784 // we fake one. 785 parameters.setGpsAltitude(0); 786 } 787 if (loc.getTime() != 0) { 788 // Location.getTime() is UTC in milliseconds. 789 // gps-timestamp is UTC in seconds. 790 long utcTimeSeconds = loc.getTime() / 1000; 791 parameters.setGpsTimestamp(utcTimeSeconds); 792 } 793 } else { 794 loc = null; 795 } 796 } 797 } 798 799 /** 800 * For still image capture, we need to get the right fps range such that the 801 * camera can slow down the framerate to allow for less-noisy/dark 802 * viewfinder output in dark conditions. 803 * 804 * @param params Camera's parameters. 805 * @return null if no appropiate fps range can't be found. Otherwise, return 806 * the right range. 807 */ 808 public static int[] getPhotoPreviewFpsRange(Parameters params) { 809 List<int[]> frameRates = params.getSupportedPreviewFpsRange(); 810 if (frameRates.size() == 0) { 811 Log.e(TAG, "No suppoted frame rates returned!"); 812 return null; 813 } 814 815 // Find the lowest min rate in supported ranges who can cover 30fps. 816 int lowestMinRate = MAX_PREVIEW_FPS_TIMES_1000; 817 for (int[] rate : frameRates) { 818 int minFps = rate[Parameters.PREVIEW_FPS_MIN_INDEX]; 819 int maxFps = rate[Parameters.PREVIEW_FPS_MAX_INDEX]; 820 if (maxFps >= PREFERRED_PREVIEW_FPS_TIMES_1000 && 821 minFps <= PREFERRED_PREVIEW_FPS_TIMES_1000 && 822 minFps < lowestMinRate) { 823 lowestMinRate = minFps; 824 } 825 } 826 827 // Find all the modes with the lowest min rate found above, the pick the 828 // one with highest max rate. 829 int resultIndex = -1; 830 int highestMaxRate = 0; 831 for (int i = 0; i < frameRates.size(); i++) { 832 int[] rate = frameRates.get(i); 833 int minFps = rate[Parameters.PREVIEW_FPS_MIN_INDEX]; 834 int maxFps = rate[Parameters.PREVIEW_FPS_MAX_INDEX]; 835 if (minFps == lowestMinRate && highestMaxRate < maxFps) { 836 highestMaxRate = maxFps; 837 resultIndex = i; 838 } 839 } 840 841 if (resultIndex >= 0) { 842 return frameRates.get(resultIndex); 843 } 844 Log.e(TAG, "Can't find an appropiate frame rate range!"); 845 return null; 846 } 847 848 public static int[] getMaxPreviewFpsRange(Parameters params) { 849 List<int[]> frameRates = params.getSupportedPreviewFpsRange(); 850 if (frameRates != null && frameRates.size() > 0) { 851 // The list is sorted. Return the last element. 852 return frameRates.get(frameRates.size() - 1); 853 } 854 return new int[0]; 855 } 856 857 private static class ImageFileNamer { 858 private final SimpleDateFormat mFormat; 859 860 // The date (in milliseconds) used to generate the last name. 861 private long mLastDate; 862 863 // Number of names generated for the same second. 864 private int mSameSecondCount; 865 866 public ImageFileNamer(String format) { 867 mFormat = new SimpleDateFormat(format); 868 } 869 870 public String generateName(long dateTaken) { 871 Date date = new Date(dateTaken); 872 String result = mFormat.format(date); 873 874 // If the last name was generated for the same second, 875 // we append _1, _2, etc to the name. 876 if (dateTaken / 1000 == mLastDate / 1000) { 877 mSameSecondCount++; 878 result += "_" + mSameSecondCount; 879 } else { 880 mLastDate = dateTaken; 881 mSameSecondCount = 0; 882 } 883 884 return result; 885 } 886 } 887 888 public static void playVideo(Activity activity, Uri uri, String title) { 889 try { 890 boolean isSecureCamera = ((CameraActivity)activity).isSecureCamera(); 891 if (!isSecureCamera) { 892 Intent intent = IntentHelper.getVideoPlayerIntent(activity, uri) 893 .putExtra(Intent.EXTRA_TITLE, title) 894 .putExtra(KEY_TREAT_UP_AS_BACK, true); 895 activity.startActivityForResult(intent, CameraActivity.REQ_CODE_DONT_SWITCH_TO_PREVIEW); 896 } else { 897 // In order not to send out any intent to be intercepted and 898 // show the lock screen immediately, we just let the secure 899 // camera activity finish. 900 activity.finish(); 901 } 902 } catch (ActivityNotFoundException e) { 903 Toast.makeText(activity, activity.getString(R.string.video_err), 904 Toast.LENGTH_SHORT).show(); 905 } 906 } 907 908 /** 909 * Starts GMM with the given location shown. If this fails, and GMM could 910 * not be found, we use a geo intent as a fallback. 911 * 912 * @param activity the activity to use for launching the Maps intent. 913 * @param latLong a 2-element array containing {latitude/longitude}. 914 */ 915 public static void showOnMap(Activity activity, double[] latLong) { 916 try { 917 // We don't use "geo:latitude,longitude" because it only centers 918 // the MapView to the specified location, but we need a marker 919 // for further operations (routing to/from). 920 // The q=(lat, lng) syntax is suggested by geo-team. 921 String uri = String.format(Locale.ENGLISH, "http://maps.google.com/maps?f=q&q=(%f,%f)", 922 latLong[0], latLong[1]); 923 ComponentName compName = new ComponentName(MAPS_PACKAGE_NAME, 924 MAPS_CLASS_NAME); 925 Intent mapsIntent = new Intent(Intent.ACTION_VIEW, 926 Uri.parse(uri)).setComponent(compName); 927 activity.startActivityForResult(mapsIntent, 928 CameraActivity.REQ_CODE_DONT_SWITCH_TO_PREVIEW); 929 } catch (ActivityNotFoundException e) { 930 // Use the "geo intent" if no GMM is installed 931 Log.e(TAG, "GMM activity not found!", e); 932 String url = String.format(Locale.ENGLISH, "geo:%f,%f", latLong[0], latLong[1]); 933 Intent mapsIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); 934 activity.startActivity(mapsIntent); 935 } 936 } 937 938 /** 939 * Dumps the stack trace. 940 * 941 * @param level How many levels of the stack are dumped. 0 means all. 942 * @return A {@link java.lang.String} of all the output with newline 943 * between each. 944 */ 945 public static String dumpStackTrace(int level) { 946 StackTraceElement[] elems = Thread.currentThread().getStackTrace(); 947 // Ignore the first 3 elements. 948 level = (level == 0 ? elems.length : Math.min(level + 3, elems.length)); 949 String ret = new String(); 950 for (int i = 3; i < level; i++) { 951 ret = ret + "\t" + elems[i].toString() + '\n'; 952 } 953 return ret; 954 } 955 956 /** 957 * Launches apps supporting action {@link Intent.ACTION_MAIN} of category 958 * {@link Intent.CATEGORY_APP_GALLERY}. Note that 959 * {@link Intent.CATEGORY_APP_GALLERY} is only available on API level 15+. 960 * 961 * @param ctx The {@link android.content.Context} to launch the app. 962 * @return {@code true} on success. 963 */ 964 public static boolean launchGallery(Context ctx) { 965 if (ApiHelper.HAS_APP_GALLERY) { 966 ctx.startActivity(IntentHelper.getGalleryIntent(ctx)); 967 return true; 968 } 969 return false; 970 } 971 } 972
