Camera.java revision 301c088512a06ec5154da2d27761537b6607f986
1/* 2 * Copyright (C) 2007 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 17package com.android.camera; 18 19import android.app.Activity; 20import android.content.ActivityNotFoundException; 21import android.content.BroadcastReceiver; 22import android.content.ContentResolver; 23import android.content.Context; 24import android.content.Intent; 25import android.content.IntentFilter; 26import android.content.SharedPreferences; 27import android.content.SharedPreferences.OnSharedPreferenceChangeListener; 28import android.content.res.Resources; 29import android.graphics.Bitmap; 30import android.graphics.BitmapFactory; 31import android.hardware.Camera.Parameters; 32import android.hardware.Camera.PictureCallback; 33import android.hardware.Camera.Size; 34import android.location.Location; 35import android.location.LocationManager; 36import android.location.LocationProvider; 37import android.media.AudioManager; 38import android.media.ToneGenerator; 39import android.net.Uri; 40import android.os.Build; 41import android.os.Bundle; 42import android.os.Debug; 43import android.os.Environment; 44import android.os.Handler; 45import android.os.Message; 46import android.os.SystemClock; 47import android.preference.PreferenceManager; 48import android.provider.MediaStore; 49import android.text.format.DateFormat; 50import android.util.AttributeSet; 51import android.util.Log; 52import android.view.GestureDetector; 53import android.view.KeyEvent; 54import android.view.LayoutInflater; 55import android.view.Menu; 56import android.view.MenuItem; 57import android.view.MotionEvent; 58import android.view.OrientationEventListener; 59import android.view.SurfaceHolder; 60import android.view.SurfaceView; 61import android.view.View; 62import android.view.ViewGroup; 63import android.view.Window; 64import android.view.WindowManager; 65import android.view.MenuItem.OnMenuItemClickListener; 66import android.widget.ImageView; 67import android.widget.ZoomButtonsController; 68 69import com.android.camera.gallery.IImage; 70import com.android.camera.gallery.IImageList; 71 72import java.io.File; 73import java.io.FileNotFoundException; 74import java.io.FileOutputStream; 75import java.io.IOException; 76import java.io.OutputStream; 77import java.util.ArrayList; 78import java.util.Collections; 79import java.util.List; 80 81/** 82 * Activity of the Camera which used to see preview and take pictures. 83 */ 84public class Camera extends Activity implements View.OnClickListener, 85 ShutterButton.OnShutterButtonListener, SurfaceHolder.Callback, 86 Switcher.OnSwitchListener, OnScreenSettings.OnVisibilityChangedListener, 87 OnSharedPreferenceChangeListener { 88 89 private static final String TAG = "camera"; 90 91 private static final int CROP_MSG = 1; 92 private static final int FIRST_TIME_INIT = 2; 93 private static final int RESTART_PREVIEW = 3; 94 private static final int CLEAR_SCREEN_DELAY = 4; 95 96 private static final String GPS_MODE_ON = "on"; 97 private static final String GPS_MODE_OFF = "off"; 98 99 private static final int SCREEN_DELAY = 2 * 60 * 1000; 100 private static final int FOCUS_BEEP_VOLUME = 100; 101 102 private static final String SCENE_MODE_ON = "on"; 103 private static final String SCENE_MODE_OFF = "off"; 104 105 private double mZoomValue; // The current zoom value. 106 private double mZoomStep; 107 private double mZoomMax; 108 public static final double ZOOM_STEP_MIN = 0.25; 109 public static final String ZOOM_STOP = "stop"; 110 public static final String ZOOM_IMMEDIATE = "zoom-immediate"; 111 public static final String ZOOM_CONTINUOUS = "zoom-continuous"; 112 public static final double ZOOM_MIN = 1.0; 113 public static final String ZOOM_SPEED = "99"; 114 115 private Parameters mParameters; 116 117 // The non-standard parameter strings to communicate with camera driver. 118 // This will be removed in the future. 119 public static final String PARM_ZOOM_STATE = "mot-zoom-state"; 120 public static final String PARM_ZOOM_STEP = "mot-zoom-step"; 121 public static final String PARM_ZOOM_TO_LEVEL = "mot-zoom-to-level"; 122 public static final String PARM_ZOOM_SPEED = "mot-zoom-speed"; 123 public static final String PARM_ZOOM_MAX = "mot-max-picture-continuous-zoom"; 124 125 private OrientationEventListener mOrientationListener; 126 private int mLastOrientation = OrientationEventListener.ORIENTATION_UNKNOWN; 127 private SharedPreferences mPreferences; 128 129 private static final int IDLE = 1; 130 private static final int SNAPSHOT_IN_PROGRESS = 2; 131 132 private static final boolean SWITCH_CAMERA = true; 133 private static final boolean SWITCH_VIDEO = false; 134 135 private int mStatus = IDLE; 136 private static final String sTempCropFilename = "crop-temp"; 137 138 private android.hardware.Camera mCameraDevice; 139 private SurfaceView mSurfaceView; 140 private SurfaceHolder mSurfaceHolder = null; 141 private ShutterButton mShutterButton; 142 private FocusRectangle mFocusRectangle; 143 private IconIndicator mGpsIndicator; 144 private IconIndicator mFlashIndicator; 145 private IconIndicator mFocusIndicator; 146 private IconIndicator mWhitebalanceIndicator; 147 private IconIndicator mSceneModeIndicator; 148 private ToneGenerator mFocusToneGenerator; 149 private ZoomButtonsController mZoomButtons; 150 private GestureDetector mGestureDetector; 151 private Switcher mSwitcher; 152 private boolean mStartPreviewFail = false; 153 154 // mPostCaptureAlert, mLastPictureButton, mThumbController 155 // are non-null only if isImageCaptureIntent() is true. 156 private ImageView mLastPictureButton; 157 private ThumbnailController mThumbController; 158 159 // mCropValue and mSaveUri are used only if isImageCaptureIntent() is true. 160 private String mCropValue; 161 private Uri mSaveUri; 162 163 private ImageCapture mImageCapture = null; 164 165 private boolean mPreviewing; 166 private boolean mPausing; 167 private boolean mFirstTimeInitialized; 168 private boolean mIsImageCaptureIntent; 169 private boolean mRecordLocation; 170 171 private static final int FOCUS_NOT_STARTED = 0; 172 private static final int FOCUSING = 1; 173 private static final int FOCUSING_SNAP_ON_FINISH = 2; 174 private static final int FOCUS_SUCCESS = 3; 175 private static final int FOCUS_FAIL = 4; 176 private int mFocusState = FOCUS_NOT_STARTED; 177 178 private ContentResolver mContentResolver; 179 private boolean mDidRegister = false; 180 181 private final ArrayList<MenuItem> mGalleryItems = new ArrayList<MenuItem>(); 182 183 private LocationManager mLocationManager = null; 184 185 // Use OneShotPreviewCallback to measure the time between 186 // JpegPictureCallback and preview. 187 private final OneShotPreviewCallback mOneShotPreviewCallback = 188 new OneShotPreviewCallback(); 189 private final ShutterCallback mShutterCallback = new ShutterCallback(); 190 private final RawPictureCallback mRawPictureCallback = 191 new RawPictureCallback(); 192 private final AutoFocusCallback mAutoFocusCallback = 193 new AutoFocusCallback(); 194 private final ZoomCallback mZoomCallback = new ZoomCallback(); 195 // Use the ErrorCallback to capture the crash count 196 // on the mediaserver 197 private final ErrorCallback mErrorCallback = new ErrorCallback(); 198 199 private long mFocusStartTime; 200 private long mFocusCallbackTime; 201 private long mCaptureStartTime; 202 private long mShutterCallbackTime; 203 private long mRawPictureCallbackTime; 204 private long mJpegPictureCallbackTime; 205 private int mPicturesRemaining; 206 207 // These latency time are for the CameraLatency test. 208 public long mAutoFocusTime; 209 public long mShutterLag; 210 public long mShutterAndRawPictureCallbackTime; 211 public long mJpegPictureCallbackTimeLag; 212 public long mRawPictureAndJpegPictureCallbackTime; 213 214 // Add the media server tag 215 public static boolean mMediaServerDied = false; 216 // Focus mode. Options are pref_camera_focusmode_entryvalues. 217 private String mFocusMode; 218 219 private final Handler mHandler = new MainHandler(); 220 private OnScreenSettings mSettings; 221 222 /** 223 * This Handler is used to post message back onto the main thread of the 224 * application 225 */ 226 private class MainHandler extends Handler { 227 @Override 228 public void handleMessage(Message msg) { 229 switch (msg.what) { 230 case RESTART_PREVIEW: { 231 restartPreview(); 232 break; 233 } 234 235 case CLEAR_SCREEN_DELAY: { 236 getWindow().clearFlags( 237 WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 238 break; 239 } 240 241 case FIRST_TIME_INIT: { 242 initializeFirstTime(); 243 break; 244 } 245 } 246 } 247 } 248 249 // Snapshots can only be taken after this is called. It should be called 250 // once only. We could have done these things in onCreate() but we want to 251 // make preview screen appear as soon as possible. 252 private void initializeFirstTime() { 253 if (mFirstTimeInitialized) return; 254 255 // Create orientation listenter. This should be done first because it 256 // takes some time to get first orientation. 257 mOrientationListener = 258 new OrientationEventListener(Camera.this) { 259 @Override 260 public void onOrientationChanged(int orientation) { 261 // We keep the last known orientation. So if the user 262 // first orient the camera then point the camera to 263 // floor/sky, we still have the correct orientation. 264 if (orientation != ORIENTATION_UNKNOWN) { 265 mLastOrientation = orientation; 266 } 267 } 268 }; 269 mOrientationListener.enable(); 270 271 // Initialize location sevice. 272 mLocationManager = (LocationManager) 273 getSystemService(Context.LOCATION_SERVICE); 274 readPreference(); 275 if (mRecordLocation) startReceivingLocationUpdates(); 276 277 checkStorage(); 278 279 // Initialize last picture button. 280 mContentResolver = getContentResolver(); 281 if (!mIsImageCaptureIntent) { 282 findViewById(R.id.camera_switch).setOnClickListener(this); 283 mLastPictureButton = 284 (ImageView) findViewById(R.id.review_thumbnail); 285 mLastPictureButton.setOnClickListener(this); 286 mThumbController = new ThumbnailController( 287 getResources(), mLastPictureButton, mContentResolver); 288 mThumbController.loadData(ImageManager.getLastImageThumbPath()); 289 // Update last image thumbnail. 290 updateThumbnailButton(); 291 } 292 293 // Initialize shutter button. 294 mShutterButton = (ShutterButton) findViewById(R.id.shutter_button); 295 mShutterButton.setOnShutterButtonListener(this); 296 mShutterButton.setVisibility(View.VISIBLE); 297 298 mFocusRectangle = (FocusRectangle) findViewById(R.id.focus_rectangle); 299 updateFocusIndicator(); 300 301 // Initialize GPS indicator. 302 mGpsIndicator = (IconIndicator) findViewById(R.id.gps_icon); 303 304 ImageManager.ensureOSXCompatibleFolder(); 305 306 installIntentFilter(); 307 308 initializeFocusTone(); 309 310 initializeZoom(); 311 312 mFirstTimeInitialized = true; 313 } 314 315 private void updateThumbnailButton() { 316 // Update last image if URI is invalid and the storage is ready. 317 if (!mThumbController.isUriValid() && mPicturesRemaining >= 0) { 318 updateLastImage(); 319 } 320 mThumbController.updateDisplayIfNeeded(); 321 } 322 323 // If the activity is paused and resumed, this method will be called in 324 // onResume. 325 private void initializeSecondTime() { 326 // Start orientation listener as soon as possible because it takes 327 // some time to get first orientation. 328 mOrientationListener.enable(); 329 330 // Start location update if needed. 331 readPreference(); 332 if (mRecordLocation) startReceivingLocationUpdates(); 333 334 installIntentFilter(); 335 336 initializeFocusTone(); 337 338 checkStorage(); 339 340 if (mZoomButtons != null) { 341 mZoomValue = Double.parseDouble( 342 mParameters.get(PARM_ZOOM_TO_LEVEL)); 343 mCameraDevice.setZoomCallback(mZoomCallback); 344 } 345 346 if (!mIsImageCaptureIntent) { 347 updateThumbnailButton(); 348 } 349 } 350 351 private void initializeZoom() { 352 // Check if the phone has zoom capability. 353 String zoomState = mParameters.get(PARM_ZOOM_STATE); 354 if (zoomState == null) return; 355 356 mZoomValue = Double.parseDouble(mParameters.get(PARM_ZOOM_TO_LEVEL)); 357 mZoomMax = Double.parseDouble(mParameters.get(PARM_ZOOM_MAX)); 358 mZoomStep = Double.parseDouble(mParameters.get(PARM_ZOOM_STEP)); 359 mParameters.set(PARM_ZOOM_SPEED, ZOOM_SPEED); 360 mCameraDevice.setParameters(mParameters); 361 362 mGestureDetector = new GestureDetector(this, new ZoomGestureListener()); 363 mCameraDevice.setZoomCallback(mZoomCallback); 364 mZoomButtons = new ZoomButtonsController(mSurfaceView); 365 mZoomButtons.setAutoDismissed(true); 366 mZoomButtons.setZoomSpeed(100); 367 mZoomButtons.setOnZoomListener( 368 new ZoomButtonsController.OnZoomListener() { 369 public void onVisibilityChanged(boolean visible) { 370 if (visible) { 371 updateZoomButtonsEnabled(); 372 } 373 } 374 375 public void onZoom(boolean zoomIn) { 376 if (isZooming()) return; 377 378 if (zoomIn) { 379 if (mZoomValue < mZoomMax) { 380 zoomToLevel(ZOOM_CONTINUOUS, mZoomValue + mZoomStep); 381 } 382 } else { 383 if (mZoomValue > ZOOM_MIN) { 384 zoomToLevel(ZOOM_CONTINUOUS, mZoomValue - mZoomStep); 385 } 386 } 387 } 388 }); 389 } 390 391 public void onVisibilityChanged(boolean visible) { 392 // When the on-screen setting is not displayed, we show the gripper. 393 // When the on-screen setting is displayed, we hide the gripper. 394 int reverseVisibility = visible ? View.INVISIBLE : View.VISIBLE; 395 findViewById(R.id.btn_gripper).setVisibility(reverseVisibility); 396 findViewById(R.id.indicator_bar).setVisibility(reverseVisibility); 397 398 if (visible) { 399 mPreferences.registerOnSharedPreferenceChangeListener(this); 400 } else { 401 mPreferences.unregisterOnSharedPreferenceChangeListener(this); 402 } 403 } 404 405 private boolean isZooming() { 406 mParameters = mCameraDevice.getParameters(); 407 return "continuous".equals(mParameters.get(PARM_ZOOM_STATE)); 408 } 409 410 private void zoomToLevel(String type, double zoomValue) { 411 if (zoomValue > mZoomMax) zoomValue = mZoomMax; 412 if (zoomValue < ZOOM_MIN) zoomValue = ZOOM_MIN; 413 414 // If the application sets a unchanged zoom value, the driver will stuck 415 // at the zoom state. This is a work-around to ensure the state is at 416 // "stop". 417 mParameters.set(PARM_ZOOM_STATE, ZOOM_STOP); 418 mCameraDevice.setParameters(mParameters); 419 420 mParameters.set(PARM_ZOOM_TO_LEVEL, Double.toString(zoomValue)); 421 mParameters.set(PARM_ZOOM_STATE, type); 422 mCameraDevice.setParameters(mParameters); 423 424 if (ZOOM_IMMEDIATE.equals(type)) mZoomValue = zoomValue; 425 } 426 427 private void updateZoomButtonsEnabled() { 428 mZoomButtons.setZoomInEnabled(mZoomValue < mZoomMax); 429 mZoomButtons.setZoomOutEnabled(mZoomValue > ZOOM_MIN); 430 } 431 432 private class ZoomGestureListener extends 433 GestureDetector.SimpleOnGestureListener { 434 @Override 435 public boolean onDown(MotionEvent e) { 436 // Show zoom buttons only when preview is started and snapshot 437 // is not in progress. mZoomButtons may be null if it is not 438 // initialized. 439 if (!mPausing && isCameraIdle() && mPreviewing 440 && mZoomButtons != null) { 441 mZoomButtons.setVisible(true); 442 } 443 return true; 444 } 445 446 @Override 447 public boolean onDoubleTap(MotionEvent e) { 448 // Perform zoom only when preview is started and snapshot is not in 449 // progress. 450 if (mPausing || !isCameraIdle() || !mPreviewing 451 || mZoomButtons == null || isZooming()) { 452 return false; 453 } 454 455 if (mZoomValue < mZoomMax) { 456 // Zoom in to the maximum. 457 while (mZoomValue < mZoomMax) { 458 zoomToLevel(ZOOM_IMMEDIATE, mZoomValue + ZOOM_STEP_MIN); 459 // Wait for a while so we are not changing zoom too fast. 460 try { 461 Thread.sleep(5); 462 } catch (InterruptedException ex) { 463 } 464 } 465 } else { 466 // Zoom out to the minimum. 467 while (mZoomValue > ZOOM_MIN) { 468 zoomToLevel(ZOOM_IMMEDIATE, mZoomValue - ZOOM_STEP_MIN); 469 // Wait for a while so we are not changing zoom too fast. 470 try { 471 Thread.sleep(5); 472 } catch (InterruptedException ex) { 473 } 474 } 475 } 476 updateZoomButtonsEnabled(); 477 return true; 478 } 479 } 480 481 @Override 482 public boolean dispatchTouchEvent(MotionEvent m) { 483 if (!super.dispatchTouchEvent(m) && mGestureDetector != null) { 484 return mGestureDetector.onTouchEvent(m); 485 } 486 return true; 487 } 488 489 LocationListener [] mLocationListeners = new LocationListener[] { 490 new LocationListener(LocationManager.GPS_PROVIDER), 491 new LocationListener(LocationManager.NETWORK_PROVIDER) 492 }; 493 494 private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 495 @Override 496 public void onReceive(Context context, Intent intent) { 497 String action = intent.getAction(); 498 if (action.equals(Intent.ACTION_MEDIA_MOUNTED) 499 || action.equals(Intent.ACTION_MEDIA_UNMOUNTED) 500 || action.equals(Intent.ACTION_MEDIA_CHECKING) 501 || action.equals(Intent.ACTION_MEDIA_SCANNER_STARTED)) { 502 checkStorage(); 503 } else if (action.equals(Intent.ACTION_MEDIA_SCANNER_FINISHED)) { 504 checkStorage(); 505 if (!mIsImageCaptureIntent) { 506 updateThumbnailButton(); 507 } 508 } 509 } 510 }; 511 512 private class LocationListener 513 implements android.location.LocationListener { 514 Location mLastLocation; 515 boolean mValid = false; 516 String mProvider; 517 518 public LocationListener(String provider) { 519 mProvider = provider; 520 mLastLocation = new Location(mProvider); 521 } 522 523 public void onLocationChanged(Location newLocation) { 524 if (newLocation.getLatitude() == 0.0 525 && newLocation.getLongitude() == 0.0) { 526 // Hack to filter out 0.0,0.0 locations 527 return; 528 } 529 // If GPS is available before start camera, we won't get status 530 // update so update GPS indicator when we receive data. 531 if (mRecordLocation 532 && LocationManager.GPS_PROVIDER.equals(mProvider)) { 533 mGpsIndicator.setMode(GPS_MODE_ON); 534 } 535 mLastLocation.set(newLocation); 536 mValid = true; 537 } 538 539 public void onProviderEnabled(String provider) { 540 } 541 542 public void onProviderDisabled(String provider) { 543 mValid = false; 544 } 545 546 public void onStatusChanged( 547 String provider, int status, Bundle extras) { 548 switch(status) { 549 case LocationProvider.OUT_OF_SERVICE: 550 case LocationProvider.TEMPORARILY_UNAVAILABLE: { 551 mValid = false; 552 if (mRecordLocation && 553 LocationManager.GPS_PROVIDER.equals(provider)) { 554 mGpsIndicator.setMode(GPS_MODE_OFF); 555 } 556 break; 557 } 558 } 559 } 560 561 public Location current() { 562 return mValid ? mLastLocation : null; 563 } 564 } 565 566 private final class OneShotPreviewCallback 567 implements android.hardware.Camera.PreviewCallback { 568 public void onPreviewFrame(byte[] data, 569 android.hardware.Camera camera) { 570 long now = System.currentTimeMillis(); 571 if (mJpegPictureCallbackTime != 0) { 572 mJpegPictureCallbackTimeLag = now - mJpegPictureCallbackTime; 573 Log.v(TAG, "mJpegPictureCallbackTimeLag = " 574 + mJpegPictureCallbackTimeLag + "ms"); 575 mJpegPictureCallbackTime = 0; 576 } else { 577 Log.v(TAG, "Got first frame"); 578 } 579 } 580 } 581 582 private final class ShutterCallback 583 implements android.hardware.Camera.ShutterCallback { 584 public void onShutter() { 585 mShutterCallbackTime = System.currentTimeMillis(); 586 mShutterLag = mShutterCallbackTime - mCaptureStartTime; 587 Log.v(TAG, "mShutterLag = " + mShutterLag + "ms"); 588 clearFocusState(); 589 } 590 } 591 592 private final class RawPictureCallback implements PictureCallback { 593 public void onPictureTaken( 594 byte [] rawData, android.hardware.Camera camera) { 595 mRawPictureCallbackTime = System.currentTimeMillis(); 596 mShutterAndRawPictureCallbackTime = 597 mRawPictureCallbackTime - mShutterCallbackTime; 598 Log.v(TAG, "mShutterAndRawPictureCallbackTime = " 599 + mShutterAndRawPictureCallbackTime + "ms"); 600 } 601 } 602 603 private final class JpegPictureCallback implements PictureCallback { 604 Location mLocation; 605 606 public JpegPictureCallback(Location loc) { 607 mLocation = loc; 608 } 609 610 public void onPictureTaken( 611 final byte [] jpegData, final android.hardware.Camera camera) { 612 if (mPausing) { 613 return; 614 } 615 616 mJpegPictureCallbackTime = System.currentTimeMillis(); 617 mRawPictureAndJpegPictureCallbackTime = 618 mJpegPictureCallbackTime - mRawPictureCallbackTime; 619 Log.v(TAG, "mRawPictureAndJpegPictureCallbackTime = " 620 + mRawPictureAndJpegPictureCallbackTime + "ms"); 621 mImageCapture.storeImage(jpegData, camera, mLocation); 622 623 if (!mIsImageCaptureIntent) { 624 long delay = 1200 - ( 625 System.currentTimeMillis() - mRawPictureCallbackTime); 626 mHandler.sendEmptyMessageDelayed( 627 RESTART_PREVIEW, Math.max(delay, 0)); 628 } 629 } 630 } 631 632 private final class AutoFocusCallback 633 implements android.hardware.Camera.AutoFocusCallback { 634 public void onAutoFocus( 635 boolean focused, android.hardware.Camera camera) { 636 mFocusCallbackTime = System.currentTimeMillis(); 637 mAutoFocusTime = mFocusCallbackTime - mFocusStartTime; 638 Log.v(TAG, "mAutoFocusTime = " + mAutoFocusTime + "ms"); 639 if (mFocusState == FOCUSING_SNAP_ON_FINISH) { 640 // Take the picture no matter focus succeeds or fails. No need 641 // to play the AF sound if we're about to play the shutter 642 // sound. 643 if (focused) { 644 mFocusState = FOCUS_SUCCESS; 645 } else { 646 mFocusState = FOCUS_FAIL; 647 } 648 mImageCapture.onSnap(); 649 } else if (mFocusState == FOCUSING) { 650 // User is half-pressing the focus key. Play the focus tone. 651 // Do not take the picture now. 652 ToneGenerator tg = mFocusToneGenerator; 653 if (tg != null) { 654 tg.startTone(ToneGenerator.TONE_PROP_BEEP2); 655 } 656 if (focused) { 657 mFocusState = FOCUS_SUCCESS; 658 } else { 659 mFocusState = FOCUS_FAIL; 660 } 661 } else if (mFocusState == FOCUS_NOT_STARTED) { 662 // User has released the focus key before focus completes. 663 // Do nothing. 664 } 665 updateFocusIndicator(); 666 } 667 } 668 669 private final class ErrorCallback 670 implements android.hardware.Camera.ErrorCallback { 671 public void onError(int error, android.hardware.Camera camera) { 672 if (error == android.hardware.Camera.CAMERA_ERROR_SERVER_DIED) { 673 mMediaServerDied = true; 674 Log.v(TAG, "media server died"); 675 } 676 } 677 } 678 679 private final class ZoomCallback 680 implements android.hardware.Camera.ZoomCallback { 681 public void onZoomUpdate(int zoomLevel, 682 android.hardware.Camera camera) { 683 mZoomValue = (double) zoomLevel / 1000; 684 Log.v(TAG, "ZoomCallback: zoom level=" + zoomLevel); 685 updateZoomButtonsEnabled(); 686 } 687 } 688 689 private class ImageCapture { 690 691 private boolean mCancel = false; 692 693 private Uri mLastContentUri; 694 695 byte[] mCaptureOnlyData; 696 697 // Returns the rotation degree in the jpeg header. 698 private int storeImage(byte[] data, Location loc) { 699 try { 700 long dateTaken = System.currentTimeMillis(); 701 String name = createName(dateTaken) + ".jpg"; 702 int[] degree = new int[1]; 703 mLastContentUri = ImageManager.addImage( 704 mContentResolver, 705 name, 706 dateTaken, 707 loc, // location from gps/network 708 ImageManager.CAMERA_IMAGE_BUCKET_NAME, name, 709 null, data, 710 degree); 711 if (mLastContentUri == null) { 712 // this means we got an error 713 mCancel = true; 714 } 715 if (!mCancel) { 716 ImageManager.setImageSize(mContentResolver, mLastContentUri, 717 new File(ImageManager.CAMERA_IMAGE_BUCKET_NAME, 718 name).length()); 719 } 720 return degree[0]; 721 } catch (Exception ex) { 722 Log.e(TAG, "Exception while compressing image.", ex); 723 return 0; 724 } 725 } 726 727 public void storeImage(final byte[] data, 728 android.hardware.Camera camera, Location loc) { 729 if (!mIsImageCaptureIntent) { 730 int degree = storeImage(data, loc); 731 sendBroadcast(new Intent( 732 "com.android.camera.NEW_PICTURE", mLastContentUri)); 733 setLastPictureThumb(data, degree, 734 mImageCapture.getLastCaptureUri()); 735 mThumbController.updateDisplayIfNeeded(); 736 } else { 737 mCaptureOnlyData = data; 738 showPostCaptureAlert(); 739 } 740 } 741 742 /** 743 * Initiate the capture of an image. 744 */ 745 public void initiate() { 746 if (mCameraDevice == null) { 747 return; 748 } 749 750 mCancel = false; 751 752 capture(); 753 } 754 755 public Uri getLastCaptureUri() { 756 return mLastContentUri; 757 } 758 759 public byte[] getLastCaptureData() { 760 return mCaptureOnlyData; 761 } 762 763 private void capture() { 764 mCaptureOnlyData = null; 765 766 // Set rotation. 767 int orientation = mLastOrientation; 768 if (orientation != OrientationEventListener.ORIENTATION_UNKNOWN) { 769 orientation += 90; 770 } 771 orientation = ImageManager.roundOrientation(orientation); 772 Log.v(TAG, "mLastOrientation = " + mLastOrientation 773 + ", orientation = " + orientation); 774 mParameters.setRotation(orientation); 775 776 // Clear previous GPS location from the parameters. 777 mParameters.removeGpsData(); 778 779 // Set GPS location. 780 Location loc = mRecordLocation ? getCurrentLocation() : null; 781 if (loc != null) { 782 double lat = loc.getLatitude(); 783 double lon = loc.getLongitude(); 784 boolean hasLatLon = (lat != 0.0d) || (lon != 0.0d); 785 786 if (hasLatLon) { 787 mParameters.setGpsLatitude(lat); 788 mParameters.setGpsLongitude(lon); 789 if (loc.hasAltitude()) { 790 mParameters.setGpsAltitude(loc.getAltitude()); 791 } else { 792 // for NETWORK_PROVIDER location provider, we may have 793 // no altitude information, but the driver needs it, so 794 // we fake one. 795 mParameters.setGpsAltitude(0); 796 } 797 if (loc.getTime() != 0) { 798 // Location.getTime() is UTC in milliseconds. 799 // gps-timestamp is UTC in seconds. 800 long utcTimeSeconds = loc.getTime() / 1000; 801 mParameters.setGpsTimestamp(utcTimeSeconds); 802 } 803 } else { 804 loc = null; 805 } 806 } 807 808 mCameraDevice.setParameters(mParameters); 809 810 mCameraDevice.takePicture(mShutterCallback, mRawPictureCallback, 811 new JpegPictureCallback(loc)); 812 mPreviewing = false; 813 } 814 815 public void onSnap() { 816 // If we are already in the middle of taking a snapshot then ignore. 817 if (mPausing || mStatus == SNAPSHOT_IN_PROGRESS) { 818 return; 819 } 820 mCaptureStartTime = System.currentTimeMillis(); 821 822 // Don't check the filesystem here, we can't afford the latency. 823 // Instead, check the cached value which was calculated when the 824 // preview was restarted. 825 if (mPicturesRemaining < 1) { 826 updateStorageHint(mPicturesRemaining); 827 return; 828 } 829 830 mStatus = SNAPSHOT_IN_PROGRESS; 831 832 mImageCapture.initiate(); 833 } 834 835 private void clearLastData() { 836 mCaptureOnlyData = null; 837 } 838 } 839 840 public boolean saveDataToFile(String filePath, byte[] data) { 841 FileOutputStream f = null; 842 try { 843 f = new FileOutputStream(filePath); 844 f.write(data); 845 } catch (IOException e) { 846 return false; 847 } finally { 848 MenuHelper.closeSilently(f); 849 } 850 return true; 851 } 852 853 private void setLastPictureThumb(byte[] data, int degree, Uri uri) { 854 BitmapFactory.Options options = new BitmapFactory.Options(); 855 options.inSampleSize = 16; 856 Bitmap lastPictureThumb = 857 BitmapFactory.decodeByteArray(data, 0, data.length, options); 858 lastPictureThumb = Util.rotate(lastPictureThumb, degree); 859 mThumbController.setData(uri, lastPictureThumb); 860 } 861 862 private static String createName(long dateTaken) { 863 return DateFormat.format("yyyy-MM-dd kk.mm.ss", dateTaken).toString(); 864 } 865 866 @Override 867 public void onCreate(Bundle icicle) { 868 super.onCreate(icicle); 869 870 Window win = getWindow(); 871 win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 872 setContentView(R.layout.camera); 873 mSurfaceView = (SurfaceView) findViewById(R.id.camera_preview); 874 875 mPreferences = PreferenceManager.getDefaultSharedPreferences(this); 876 877 /* 878 * To reduce startup time, we start the preview in another thread. 879 * We make sure the preview is started at the end of onCreate. 880 */ 881 Thread startPreviewThread = new Thread(new Runnable() { 882 public void run() { 883 try { 884 mStartPreviewFail = false; 885 startPreview(); 886 } catch (CameraHardwareException e) { 887 // In eng build, we throw the exception so that test tool 888 // can detect it and report it 889 if ("eng".equals(Build.TYPE)) { 890 throw new RuntimeException(e); 891 } 892 mStartPreviewFail = true; 893 } 894 } 895 }); 896 startPreviewThread.start(); 897 898 // don't set mSurfaceHolder here. We have it set ONLY within 899 // surfaceChanged / surfaceDestroyed, other parts of the code 900 // assume that when it is set, the surface is also set. 901 SurfaceHolder holder = mSurfaceView.getHolder(); 902 holder.addCallback(this); 903 holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 904 905 mIsImageCaptureIntent = isImageCaptureIntent(); 906 if (mIsImageCaptureIntent) { 907 setupCaptureParams(); 908 } 909 910 LayoutInflater inflater = getLayoutInflater(); 911 912 ViewGroup rootView = (ViewGroup) findViewById(R.id.camera); 913 if (mIsImageCaptureIntent) { 914 View controlBar = inflater.inflate( 915 R.layout.attach_camera_control, rootView); 916 controlBar.findViewById(R.id.btn_cancel).setOnClickListener(this); 917 controlBar.findViewById(R.id.btn_retake).setOnClickListener(this); 918 controlBar.findViewById(R.id.btn_done).setOnClickListener(this); 919 } else { 920 inflater.inflate(R.layout.camera_control, rootView); 921 mSwitcher = ((Switcher) findViewById(R.id.camera_switch)); 922 mSwitcher.setOnSwitchListener(this); 923 mSwitcher.addTouchView(findViewById(R.id.camera_switch_set)); 924 } 925 findViewById(R.id.btn_gripper) 926 .setOnTouchListener(new GripperTouchListener()); 927 928 mFlashIndicator = (IconIndicator) findViewById(R.id.flash_icon); 929 mFocusIndicator = (IconIndicator) findViewById(R.id.focus_icon); 930 mSceneModeIndicator = (IconIndicator) findViewById(R.id.scenemode_icon); 931 mWhitebalanceIndicator = 932 (IconIndicator) findViewById(R.id.whitebalance_icon); 933 934 // Make sure preview is started. 935 try { 936 startPreviewThread.join(); 937 if (mStartPreviewFail) { 938 showCameraErrorAndFinish(); 939 return; 940 } 941 } catch (InterruptedException ex) { 942 // ignore 943 } 944 } 945 946 private class GripperTouchListener implements View.OnTouchListener { 947 public boolean onTouch(View view, MotionEvent event) { 948 switch (event.getAction()) { 949 case MotionEvent.ACTION_DOWN: 950 return true; 951 case MotionEvent.ACTION_UP: 952 showOnScreenSettings(); 953 return true; 954 } 955 return false; 956 } 957 } 958 959 @Override 960 public void onStart() { 961 super.onStart(); 962 if (!mIsImageCaptureIntent) { 963 mSwitcher.setSwitch(SWITCH_CAMERA); 964 } 965 } 966 967 private void checkStorage() { 968 if (ImageManager.isMediaScannerScanning(getContentResolver())) { 969 mPicturesRemaining = MenuHelper.NO_STORAGE_ERROR; 970 } else { 971 calculatePicturesRemaining(); 972 } 973 updateStorageHint(mPicturesRemaining); 974 } 975 976 private boolean mScreenComplete = false; 977 978 private void showOnScreenSettings() { 979 boolean autoSceneMode = Parameters 980 .SCENE_MODE_AUTO.equals(mParameters.getSceneMode()); 981 if (mSettings == null) { 982 mSettings = new OnScreenSettings( 983 findViewById(R.id.camera_preview)); 984 CameraSettings helper = new CameraSettings(this, mParameters); 985 mSettings.setPreferenceScreen(helper 986 .getPreferenceScreen(R.xml.camera_preferences)); 987 mSettings.setOnVisibilityChangedListener(this); 988 989 // If the current screne mode is not auto, then the supported 990 // options is not complete, we need to read it again later. 991 // For example: in the scene mode "ACTION", the supported focus mode 992 // will change from {infinite, macro, auto} to {infinite}. 993 mScreenComplete = autoSceneMode; 994 if (autoSceneMode) { 995 mSettings.overrideSettings(CameraSettings.KEY_FLASH_MODE, null); 996 mSettings.overrideSettings(CameraSettings.KEY_FOCUS_MODE, null); 997 mSettings.overrideSettings( 998 CameraSettings.KEY_WHITE_BALANCE, null); 999 } else { 1000 mSettings.overrideSettings(CameraSettings.KEY_FLASH_MODE, 1001 mParameters.getFlashMode()); 1002 mSettings.overrideSettings(CameraSettings.KEY_FOCUS_MODE, 1003 mParameters.getFocusMode()); 1004 mSettings.overrideSettings(CameraSettings.KEY_WHITE_BALANCE, 1005 mParameters.getWhiteBalance()); 1006 } 1007 } 1008 1009 mSettings.setVisible(true); 1010 } 1011 1012 public void onClick(View v) { 1013 switch (v.getId()) { 1014 case R.id.btn_retake: 1015 hidePostCaptureAlert(); 1016 restartPreview(); 1017 break; 1018 case R.id.review_thumbnail: 1019 if (isCameraIdle()) { 1020 viewLastImage(); 1021 } 1022 break; 1023 case R.id.btn_done: 1024 doAttach(); 1025 break; 1026 case R.id.btn_cancel: 1027 doCancel(); 1028 } 1029 } 1030 1031 private Bitmap createCaptureBitmap(byte[] data) { 1032 // This is really stupid...we just want to read the orientation in 1033 // the jpeg header. 1034 String filepath = ImageManager.getTempJpegPath(); 1035 int degree = 0; 1036 if (saveDataToFile(filepath, data)) { 1037 degree = ImageManager.getExifOrientation(filepath); 1038 new File(filepath).delete(); 1039 } 1040 1041 // Limit to 50k pixels so we can return it in the intent. 1042 Bitmap bitmap = Util.makeBitmap(data, 50*1024); 1043 bitmap = Util.rotate(bitmap, degree); 1044 return bitmap; 1045 } 1046 1047 private void doAttach() { 1048 if (mPausing) { 1049 return; 1050 } 1051 1052 byte[] data = mImageCapture.getLastCaptureData(); 1053 1054 if (mCropValue == null) { 1055 // First handle the no crop case -- just return the value. If the 1056 // caller specifies a "save uri" then write the data to it's 1057 // stream. Otherwise, pass back a scaled down version of the bitmap 1058 // directly in the extras. 1059 if (mSaveUri != null) { 1060 OutputStream outputStream = null; 1061 try { 1062 outputStream = mContentResolver.openOutputStream(mSaveUri); 1063 outputStream.write(data); 1064 outputStream.close(); 1065 1066 setResult(RESULT_OK); 1067 finish(); 1068 } catch (IOException ex) { 1069 // ignore exception 1070 } finally { 1071 Util.closeSilently(outputStream); 1072 } 1073 } else { 1074 Bitmap bitmap = createCaptureBitmap(data); 1075 setResult(RESULT_OK, 1076 new Intent("inline-data").putExtra("data", bitmap)); 1077 finish(); 1078 } 1079 } else { 1080 // Save the image to a temp file and invoke the cropper 1081 Uri tempUri = null; 1082 FileOutputStream tempStream = null; 1083 try { 1084 File path = getFileStreamPath(sTempCropFilename); 1085 path.delete(); 1086 tempStream = openFileOutput(sTempCropFilename, 0); 1087 tempStream.write(data); 1088 tempStream.close(); 1089 tempUri = Uri.fromFile(path); 1090 } catch (FileNotFoundException ex) { 1091 setResult(Activity.RESULT_CANCELED); 1092 finish(); 1093 return; 1094 } catch (IOException ex) { 1095 setResult(Activity.RESULT_CANCELED); 1096 finish(); 1097 return; 1098 } finally { 1099 Util.closeSilently(tempStream); 1100 } 1101 1102 Bundle newExtras = new Bundle(); 1103 if (mCropValue.equals("circle")) { 1104 newExtras.putString("circleCrop", "true"); 1105 } 1106 if (mSaveUri != null) { 1107 newExtras.putParcelable(MediaStore.EXTRA_OUTPUT, mSaveUri); 1108 } else { 1109 newExtras.putBoolean("return-data", true); 1110 } 1111 1112 Intent cropIntent = new Intent(); 1113 cropIntent.setClass(this, CropImage.class); 1114 cropIntent.setData(tempUri); 1115 cropIntent.putExtras(newExtras); 1116 1117 startActivityForResult(cropIntent, CROP_MSG); 1118 } 1119 } 1120 1121 private void doCancel() { 1122 setResult(RESULT_CANCELED, new Intent()); 1123 finish(); 1124 } 1125 1126 public void onShutterButtonFocus(ShutterButton button, boolean pressed) { 1127 if (mPausing) { 1128 return; 1129 } 1130 switch (button.getId()) { 1131 case R.id.shutter_button: 1132 doFocus(pressed); 1133 break; 1134 } 1135 } 1136 1137 public void onShutterButtonClick(ShutterButton button) { 1138 if (mPausing) { 1139 return; 1140 } 1141 switch (button.getId()) { 1142 case R.id.shutter_button: 1143 doSnap(); 1144 break; 1145 } 1146 } 1147 1148 private OnScreenHint mStorageHint; 1149 1150 private void updateStorageHint(int remaining) { 1151 String noStorageText = null; 1152 1153 if (remaining == MenuHelper.NO_STORAGE_ERROR) { 1154 String state = Environment.getExternalStorageState(); 1155 if (state == Environment.MEDIA_CHECKING || 1156 ImageManager.isMediaScannerScanning(getContentResolver())) { 1157 noStorageText = getString(R.string.preparing_sd); 1158 } else { 1159 noStorageText = getString(R.string.no_storage); 1160 } 1161 } else if (remaining < 1) { 1162 noStorageText = getString(R.string.not_enough_space); 1163 } 1164 1165 if (noStorageText != null) { 1166 if (mStorageHint == null) { 1167 mStorageHint = OnScreenHint.makeText(this, noStorageText); 1168 } else { 1169 mStorageHint.setText(noStorageText); 1170 } 1171 mStorageHint.show(); 1172 } else if (mStorageHint != null) { 1173 mStorageHint.cancel(); 1174 mStorageHint = null; 1175 } 1176 } 1177 1178 private void installIntentFilter() { 1179 // install an intent filter to receive SD card related events. 1180 IntentFilter intentFilter = 1181 new IntentFilter(Intent.ACTION_MEDIA_MOUNTED); 1182 intentFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED); 1183 intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED); 1184 intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED); 1185 intentFilter.addAction(Intent.ACTION_MEDIA_CHECKING); 1186 intentFilter.addDataScheme("file"); 1187 registerReceiver(mReceiver, intentFilter); 1188 mDidRegister = true; 1189 } 1190 1191 private void initializeFocusTone() { 1192 // Initialize focus tone generator. 1193 try { 1194 mFocusToneGenerator = new ToneGenerator( 1195 AudioManager.STREAM_SYSTEM, FOCUS_BEEP_VOLUME); 1196 } catch (Throwable ex) { 1197 Log.w(TAG, "Exception caught while creating tone generator: ", ex); 1198 mFocusToneGenerator = null; 1199 } 1200 } 1201 1202 private void readPreference() { 1203 mRecordLocation = mPreferences.getBoolean( 1204 "pref_camera_recordlocation_key", false); 1205 mFocusMode = mPreferences.getString( 1206 CameraSettings.KEY_FOCUS_MODE, 1207 getString(R.string.pref_camera_focusmode_default)); 1208 } 1209 1210 @Override 1211 public void onResume() { 1212 super.onResume(); 1213 1214 mPausing = false; 1215 mJpegPictureCallbackTime = 0; 1216 mImageCapture = new ImageCapture(); 1217 1218 // Start the preview if it is not started. 1219 if (!mPreviewing && !mStartPreviewFail) { 1220 try { 1221 startPreview(); 1222 } catch (CameraHardwareException e) { 1223 showCameraErrorAndFinish(); 1224 return; 1225 } 1226 } 1227 1228 if (mSurfaceHolder != null) { 1229 // If first time initialization is not finished, put it in the 1230 // message queue. 1231 if (!mFirstTimeInitialized) { 1232 mHandler.sendEmptyMessage(FIRST_TIME_INIT); 1233 } else { 1234 initializeSecondTime(); 1235 } 1236 } 1237 keepScreenOnAwhile(); 1238 } 1239 1240 private static ImageManager.DataLocation dataLocation() { 1241 return ImageManager.DataLocation.EXTERNAL; 1242 } 1243 1244 @Override 1245 protected void onPause() { 1246 mPausing = true; 1247 stopPreview(); 1248 // Close the camera now because other activities may need to use it. 1249 closeCamera(); 1250 resetScreenOn(); 1251 1252 if (mSettings != null && mSettings.isVisible()) { 1253 mSettings.setVisible(false); 1254 } 1255 1256 if (mFirstTimeInitialized) { 1257 mOrientationListener.disable(); 1258 mGpsIndicator.setMode(GPS_MODE_OFF); 1259 if (!mIsImageCaptureIntent) { 1260 mThumbController.storeData( 1261 ImageManager.getLastImageThumbPath()); 1262 } 1263 hidePostCaptureAlert(); 1264 } 1265 1266 if (mDidRegister) { 1267 unregisterReceiver(mReceiver); 1268 mDidRegister = false; 1269 } 1270 stopReceivingLocationUpdates(); 1271 1272 if (mFocusToneGenerator != null) { 1273 mFocusToneGenerator.release(); 1274 mFocusToneGenerator = null; 1275 } 1276 1277 if (mStorageHint != null) { 1278 mStorageHint.cancel(); 1279 mStorageHint = null; 1280 } 1281 1282 // If we are in an image capture intent and has taken 1283 // a picture, we just clear it in onPause. 1284 mImageCapture.clearLastData(); 1285 mImageCapture = null; 1286 1287 // This is necessary to make the ZoomButtonsController unregister 1288 // its configuration change receiver. 1289 if (mZoomButtons != null) { 1290 mZoomButtons.setVisible(false); 1291 } 1292 1293 // Remove the messages in the event queue. 1294 mHandler.removeMessages(RESTART_PREVIEW); 1295 mHandler.removeMessages(FIRST_TIME_INIT); 1296 1297 super.onPause(); 1298 } 1299 1300 @Override 1301 protected void onActivityResult( 1302 int requestCode, int resultCode, Intent data) { 1303 switch (requestCode) { 1304 case CROP_MSG: { 1305 Intent intent = new Intent(); 1306 if (data != null) { 1307 Bundle extras = data.getExtras(); 1308 if (extras != null) { 1309 intent.putExtras(extras); 1310 } 1311 } 1312 setResult(resultCode, intent); 1313 finish(); 1314 1315 File path = getFileStreamPath(sTempCropFilename); 1316 path.delete(); 1317 1318 break; 1319 } 1320 } 1321 } 1322 1323 private boolean canTakePicture() { 1324 return isCameraIdle() && mPreviewing && (mPicturesRemaining > 0); 1325 } 1326 1327 private void autoFocus() { 1328 // Initiate autofocus only when preview is started and snapshot is not 1329 // in progress. 1330 if (canTakePicture()) { 1331 Log.v(TAG, "Start autofocus."); 1332 if (mZoomButtons != null) mZoomButtons.setVisible(false); 1333 mFocusStartTime = System.currentTimeMillis(); 1334 mFocusState = FOCUSING; 1335 updateFocusIndicator(); 1336 mCameraDevice.autoFocus(mAutoFocusCallback); 1337 } 1338 } 1339 1340 private void cancelAutoFocus() { 1341 // User releases half-pressed focus key. 1342 if (mFocusState == FOCUSING || mFocusState == FOCUS_SUCCESS 1343 || mFocusState == FOCUS_FAIL) { 1344 Log.v(TAG, "Cancel autofocus."); 1345 mCameraDevice.cancelAutoFocus(); 1346 } 1347 if (mFocusState != FOCUSING_SNAP_ON_FINISH) { 1348 clearFocusState(); 1349 } 1350 } 1351 1352 private void clearFocusState() { 1353 mFocusState = FOCUS_NOT_STARTED; 1354 updateFocusIndicator(); 1355 } 1356 1357 private void updateFocusIndicator() { 1358 if (mFocusRectangle == null) return; 1359 1360 if (mFocusState == FOCUSING || mFocusState == FOCUSING_SNAP_ON_FINISH) { 1361 mFocusRectangle.showStart(); 1362 } else if (mFocusState == FOCUS_SUCCESS) { 1363 mFocusRectangle.showSuccess(); 1364 } else if (mFocusState == FOCUS_FAIL) { 1365 mFocusRectangle.showFail(); 1366 } else { 1367 mFocusRectangle.clear(); 1368 } 1369 } 1370 1371 @Override 1372 public void onBackPressed() { 1373 if (!isCameraIdle()) { 1374 // ignore backs while we're taking a picture 1375 return; 1376 } 1377 super.onBackPressed(); 1378 } 1379 1380 @Override 1381 public boolean onKeyDown(int keyCode, KeyEvent event) { 1382 switch (keyCode) { 1383 case KeyEvent.KEYCODE_FOCUS: 1384 if (mFirstTimeInitialized && event.getRepeatCount() == 0) { 1385 doFocus(true); 1386 } 1387 return true; 1388 case KeyEvent.KEYCODE_CAMERA: 1389 if (mFirstTimeInitialized && event.getRepeatCount() == 0) { 1390 doSnap(); 1391 } 1392 return true; 1393 case KeyEvent.KEYCODE_DPAD_CENTER: 1394 // If we get a dpad center event without any focused view, move 1395 // the focus to the shutter button and press it. 1396 if (mFirstTimeInitialized && event.getRepeatCount() == 0) { 1397 // Start auto-focus immediately to reduce shutter lag. After 1398 // the shutter button gets the focus, doFocus() will be 1399 // called again but it is fine. 1400 doFocus(true); 1401 if (mShutterButton.isInTouchMode()) { 1402 mShutterButton.requestFocusFromTouch(); 1403 } else { 1404 mShutterButton.requestFocus(); 1405 } 1406 mShutterButton.setPressed(true); 1407 } 1408 return true; 1409 } 1410 1411 return super.onKeyDown(keyCode, event); 1412 } 1413 1414 @Override 1415 public boolean onKeyUp(int keyCode, KeyEvent event) { 1416 switch (keyCode) { 1417 case KeyEvent.KEYCODE_FOCUS: 1418 if (mFirstTimeInitialized) { 1419 doFocus(false); 1420 } 1421 return true; 1422 case KeyEvent.KEYCODE_MENU: 1423 if (mIsImageCaptureIntent) { 1424 showOnScreenSettings(); 1425 return true; 1426 } 1427 break; 1428 } 1429 return super.onKeyUp(keyCode, event); 1430 } 1431 1432 private void doSnap() { 1433 Log.v(TAG, "doSnap: mFocusState=" + mFocusState); 1434 // If the user has half-pressed the shutter and focus is completed, we 1435 // can take the photo right away. If the focus mode is infinity, we can 1436 // also take the photo. 1437 if (mFocusMode.equals(Parameters.FOCUS_MODE_INFINITY) 1438 || (mFocusState == FOCUS_SUCCESS 1439 || mFocusState == FOCUS_FAIL)) { 1440 if (mZoomButtons != null) mZoomButtons.setVisible(false); 1441 mImageCapture.onSnap(); 1442 } else if (mFocusState == FOCUSING) { 1443 // Half pressing the shutter (i.e. the focus button event) will 1444 // already have requested AF for us, so just request capture on 1445 // focus here. 1446 mFocusState = FOCUSING_SNAP_ON_FINISH; 1447 } else if (mFocusState == FOCUS_NOT_STARTED) { 1448 // Focus key down event is dropped for some reasons. Just ignore. 1449 } 1450 } 1451 1452 private void doFocus(boolean pressed) { 1453 // Do the focus if the mode is not infinity. 1454 if (!mFocusMode.equals(Parameters.FOCUS_MODE_INFINITY)) { 1455 if (pressed) { // Focus key down. 1456 autoFocus(); 1457 } else { // Focus key up. 1458 cancelAutoFocus(); 1459 } 1460 } 1461 } 1462 1463 public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 1464 // Make sure we have a surface in the holder before proceeding. 1465 if (holder.getSurface() == null) { 1466 Log.d(TAG, "holder.getSurface() == null"); 1467 return; 1468 } 1469 1470 // The mCameraDevice will be null if it fails to connect to the camera 1471 // hardware. In this case we will show a dialog and then finish the 1472 // activity, so it's OK to ignore it. 1473 if (mCameraDevice == null) return; 1474 1475 mSurfaceHolder = holder; 1476 1477 // Sometimes surfaceChanged is called after onPause. Ignore it. 1478 if (mPausing || isFinishing()) return; 1479 1480 // Set preview display if the surface is being created. Preview was 1481 // already started. 1482 if (holder.isCreating()) { 1483 setPreviewDisplay(holder); 1484 } 1485 1486 // If first time initialization is not finished, send a message to do 1487 // it later. We want to finish surfaceChanged as soon as possible to let 1488 // user see preview first. 1489 if (!mFirstTimeInitialized) { 1490 mHandler.sendEmptyMessage(FIRST_TIME_INIT); 1491 } else { 1492 initializeSecondTime(); 1493 } 1494 } 1495 1496 public void surfaceCreated(SurfaceHolder holder) { 1497 } 1498 1499 public void surfaceDestroyed(SurfaceHolder holder) { 1500 stopPreview(); 1501 mSurfaceHolder = null; 1502 } 1503 1504 private void closeCamera() { 1505 if (mCameraDevice != null) { 1506 CameraHolder.instance().release(); 1507 mCameraDevice = null; 1508 mPreviewing = false; 1509 } 1510 } 1511 1512 private void ensureCameraDevice() throws CameraHardwareException { 1513 if (mCameraDevice == null) { 1514 mCameraDevice = CameraHolder.instance().open(); 1515 } 1516 } 1517 1518 private void updateLastImage() { 1519 IImageList list = ImageManager.makeImageList( 1520 mContentResolver, 1521 dataLocation(), 1522 ImageManager.INCLUDE_IMAGES, 1523 ImageManager.SORT_ASCENDING, 1524 ImageManager.CAMERA_IMAGE_BUCKET_ID); 1525 int count = list.getCount(); 1526 if (count > 0) { 1527 IImage image = list.getImageAt(count - 1); 1528 Uri uri = image.fullSizeImageUri(); 1529 mThumbController.setData(uri, image.miniThumbBitmap()); 1530 } else { 1531 mThumbController.setData(null, null); 1532 } 1533 list.close(); 1534 } 1535 1536 private void showCameraErrorAndFinish() { 1537 Resources ress = getResources(); 1538 Util.showFatalErrorAndFinish(Camera.this, 1539 ress.getString(R.string.camera_error_title), 1540 ress.getString(R.string.cannot_connect_camera)); 1541 } 1542 1543 private void restartPreview() { 1544 // make sure the surfaceview fills the whole screen when previewing 1545 try { 1546 startPreview(); 1547 } catch (CameraHardwareException e) { 1548 showCameraErrorAndFinish(); 1549 return; 1550 } 1551 1552 // Calculate this in advance of each shot so we don't add to shutter 1553 // latency. It's true that someone else could write to the SD card in 1554 // the mean time and fill it, but that could have happened between the 1555 // shutter press and saving the JPEG too. 1556 calculatePicturesRemaining(); 1557 } 1558 1559 private void setPreviewDisplay(SurfaceHolder holder) { 1560 try { 1561 mCameraDevice.setPreviewDisplay(holder); 1562 } catch (Throwable ex) { 1563 closeCamera(); 1564 throw new RuntimeException("setPreviewDisplay failed", ex); 1565 } 1566 } 1567 1568 private void startPreview() throws CameraHardwareException { 1569 if (mPausing || isFinishing()) return; 1570 1571 ensureCameraDevice(); 1572 1573 // If we're previewing already, stop the preview first (this will blank 1574 // the screen). 1575 if (mPreviewing) stopPreview(); 1576 1577 setPreviewDisplay(mSurfaceHolder); 1578 setCameraParameters(); 1579 1580 final long wallTimeStart = SystemClock.elapsedRealtime(); 1581 final long threadTimeStart = Debug.threadCpuTimeNanos(); 1582 1583 // Set one shot preview callback for latency measurement. 1584 mCameraDevice.setOneShotPreviewCallback(mOneShotPreviewCallback); 1585 mCameraDevice.setErrorCallback(mErrorCallback); 1586 1587 try { 1588 Log.v(TAG, "startPreview"); 1589 mCameraDevice.startPreview(); 1590 } catch (Throwable ex) { 1591 closeCamera(); 1592 throw new RuntimeException("startPreview failed", ex); 1593 } 1594 mPreviewing = true; 1595 mStatus = IDLE; 1596 1597 long threadTimeEnd = Debug.threadCpuTimeNanos(); 1598 long wallTimeEnd = SystemClock.elapsedRealtime(); 1599 if ((wallTimeEnd - wallTimeStart) > 3000) { 1600 Log.w(TAG, "startPreview() to " + (wallTimeEnd - wallTimeStart) 1601 + " ms. Thread time was" 1602 + (threadTimeEnd - threadTimeStart) / 1000000 + " ms."); 1603 } 1604 } 1605 1606 private void stopPreview() { 1607 if (mCameraDevice != null && mPreviewing) { 1608 Log.v(TAG, "stopPreview"); 1609 mCameraDevice.stopPreview(); 1610 } 1611 mPreviewing = false; 1612 // If auto focus was in progress, it would have been canceled. 1613 clearFocusState(); 1614 } 1615 1616 private Size getOptimalPreviewSize(List<Size> sizes, double targetRatio) { 1617 final double ASPECT_TOLERANCE = 0.05; 1618 if (sizes == null) return null; 1619 1620 Size optimalSize = null; 1621 double minDiff = Double.MAX_VALUE; 1622 1623 int targetHeight = mSurfaceView.getHeight(); 1624 if (targetHeight <= 0) { 1625 // We don't know the size of SurefaceView, use screen height 1626 WindowManager windowManager = (WindowManager) 1627 getSystemService(Context.WINDOW_SERVICE); 1628 targetHeight = windowManager.getDefaultDisplay().getHeight(); 1629 } 1630 1631 // Try to find an size match aspect ratio and size 1632 for (Size size : sizes) { 1633 double ratio = (double) size.width / size.height; 1634 if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue; 1635 if (Math.abs(size.height - targetHeight) < minDiff) { 1636 optimalSize = size; 1637 minDiff = Math.abs(size.height - targetHeight); 1638 } 1639 } 1640 1641 // Cannot find the one match the aspect ratio, ignore the requirement 1642 if (optimalSize == null) { 1643 Log.v(TAG, "No preview size match the aspect ratio"); 1644 minDiff = Double.MAX_VALUE; 1645 for (Size size : sizes) { 1646 if (Math.abs(size.height - targetHeight) < minDiff) { 1647 optimalSize = size; 1648 minDiff = Math.abs(size.height - targetHeight); 1649 } 1650 } 1651 } 1652 Log.v(TAG, String.format( 1653 "Optimal preview size is %sx%s", 1654 optimalSize.width, optimalSize.height)); 1655 return optimalSize; 1656 } 1657 1658 private static boolean isSupported(String value, List<String> supported) { 1659 return supported == null ? false : supported.indexOf(value) >= 0; 1660 } 1661 1662 private void setCameraParameters() { 1663 mParameters = mCameraDevice.getParameters(); 1664 1665 // Reset preview frame rate to the maximum because it may be lowered by 1666 // video camera application. 1667 List<Integer> frameRates = mParameters.getSupportedPreviewFrameRates(); 1668 if (frameRates != null) { 1669 Integer max = Collections.max(frameRates); 1670 mParameters.setPreviewFrameRate(max); 1671 } 1672 1673 // Set picture size. 1674 String pictureSize = mPreferences.getString( 1675 CameraSettings.KEY_PICTURE_SIZE, null); 1676 if (pictureSize == null) { 1677 CameraSettings.initialCameraPictureSize(this, mParameters); 1678 } else { 1679 List<Size> supported = mParameters.getSupportedPictureSizes(); 1680 CameraSettings.setCameraPictureSize( 1681 pictureSize, supported, mParameters); 1682 } 1683 1684 // Set the preview frame aspect ratio according to the picture size. 1685 Size size = mParameters.getPictureSize(); 1686 PreviewFrameLayout frameLayout = 1687 (PreviewFrameLayout) findViewById(R.id.frame_layout); 1688 frameLayout.setAspectRatio((double) size.width / size.height); 1689 1690 // Set a preview size that is closest to the viewfinder height and has 1691 // the right aspect ratio. 1692 List<Size> sizes = mParameters.getSupportedPreviewSizes(); 1693 Size optimalSize = getOptimalPreviewSize( 1694 sizes, (double) size.width / size.height); 1695 if (optimalSize != null) { 1696 mParameters.setPreviewSize(optimalSize.width, optimalSize.height); 1697 } 1698 1699 // Set JPEG quality. 1700 String jpegQuality = mPreferences.getString( 1701 CameraSettings.KEY_JPEG_QUALITY, 1702 getString(R.string.pref_camera_jpegquality_default)); 1703 mParameters.setJpegQuality(Integer.parseInt(jpegQuality)); 1704 1705 // For the following settings, we need to check if the settings are 1706 // still supported by latest driver, if not, ignore the settings. 1707 1708 // Set color effect parameter. 1709 String colorEffect = mPreferences.getString( 1710 CameraSettings.KEY_COLOR_EFFECT, 1711 getString(R.string.pref_camera_coloreffect_default)); 1712 if (isSupported(colorEffect, mParameters.getSupportedColorEffects())) { 1713 mParameters.setColorEffect(colorEffect); 1714 } 1715 1716 // Set scene mode. 1717 String sceneMode = mPreferences.getString( 1718 CameraSettings.KEY_SCENE_MODE, 1719 getString(R.string.pref_camera_scenemode_default)); 1720 if (isSupported(sceneMode, mParameters.getSupportedSceneModes())) { 1721 mParameters.setSceneMode(sceneMode); 1722 } 1723 1724 // If scene mode is set, we cannot set flash mode, white balance, and 1725 // focus mode, instead, we read it from driver 1726 String flashMode; 1727 String whiteBalance; 1728 1729 if (!Parameters.SCENE_MODE_AUTO.equals(sceneMode)) { 1730 mCameraDevice.setParameters(mParameters); 1731 1732 // Setting scene mode will change the settings of flash mode, white 1733 // balance, and focus mode. So read back here, so that we know 1734 // what's the settings 1735 mParameters = mCameraDevice.getParameters(); 1736 flashMode = mParameters.getFlashMode(); 1737 whiteBalance = mParameters.getWhiteBalance(); 1738 mFocusMode = mParameters.getFocusMode(); 1739 if (mSettings != null) { 1740 mSettings.overrideSettings( 1741 CameraSettings.KEY_FLASH_MODE, flashMode); 1742 mSettings.overrideSettings( 1743 CameraSettings.KEY_WHITE_BALANCE, whiteBalance); 1744 mSettings.overrideSettings( 1745 CameraSettings.KEY_FOCUS_MODE, mFocusMode); 1746 } 1747 } else { 1748 if (mSettings != null) { 1749 mSettings.overrideSettings(CameraSettings.KEY_FLASH_MODE, null); 1750 mSettings.overrideSettings(CameraSettings.KEY_FOCUS_MODE, null); 1751 mSettings.overrideSettings( 1752 CameraSettings.KEY_WHITE_BALANCE, null); 1753 } 1754 1755 // Set flash mode. 1756 flashMode = mPreferences.getString( 1757 CameraSettings.KEY_FLASH_MODE, 1758 getString(R.string.pref_camera_flashmode_default)); 1759 List<String> supportedFlash = mParameters.getSupportedFlashModes(); 1760 if (isSupported(flashMode, supportedFlash)) { 1761 mParameters.setFlashMode(flashMode); 1762 } else { 1763 // If the current flashMode is not support, show the 1764 // FLASH_MODE_OFF icon. 1765 flashMode = Parameters.FLASH_MODE_OFF; 1766 } 1767 1768 // Set white balance parameter. 1769 whiteBalance = mPreferences.getString( 1770 CameraSettings.KEY_WHITE_BALANCE, 1771 getString(R.string.pref_camera_whitebalance_default)); 1772 if (isSupported(whiteBalance, mParameters.getSupportedWhiteBalance())) { 1773 mParameters.setWhiteBalance(whiteBalance); 1774 } 1775 1776 // Set focus mode. 1777 mFocusMode = mPreferences.getString( 1778 CameraSettings.KEY_FOCUS_MODE, 1779 getString(R.string.pref_camera_focusmode_default)); 1780 if (isSupported(mFocusMode, mParameters.getSupportedFocusModes())) { 1781 mParameters.setFocusMode(mFocusMode); 1782 } 1783 mCameraDevice.setParameters(mParameters); 1784 1785 if (!mScreenComplete && mSettings != null) { 1786 // The current scene mode is auto and thus the supported values 1787 // of the three settings (flash mode, white balance, and focus 1788 // mode) are complete now. If we didn't have the complete 1789 // preference screen, read it now. 1790 mScreenComplete = true; 1791 mParameters = mCameraDevice.getParameters(); 1792 CameraSettings helper = new CameraSettings(this, mParameters); 1793 mSettings.setPreferenceScreen(helper 1794 .getPreferenceScreen(R.xml.camera_preferences)); 1795 } 1796 } 1797 1798 // We post the runner because this function can be called from 1799 // non-UI thread (i.e., startPreviewThread). 1800 final String finalWhiteBalance = whiteBalance; 1801 final String finalFlashMode = flashMode; 1802 final String finalSceneMode = 1803 Parameters.SCENE_MODE_AUTO.equals(whiteBalance) 1804 ? SCENE_MODE_OFF 1805 : SCENE_MODE_ON; 1806 1807 mHandler.post(new Runnable() { 1808 public void run() { 1809 mFocusIndicator.setMode(mFocusMode); 1810 mWhitebalanceIndicator.setMode(finalWhiteBalance); 1811 mSceneModeIndicator.setMode(finalSceneMode); 1812 mFlashIndicator.setMode(finalFlashMode); 1813 } 1814 }); 1815 1816 } 1817 1818 private void gotoGallery() { 1819 MenuHelper.gotoCameraImageGallery(this); 1820 } 1821 1822 private void viewLastImage() { 1823 if (mThumbController.isUriValid()) { 1824 Uri targetUri = mThumbController.getUri(); 1825 targetUri = targetUri.buildUpon().appendQueryParameter( 1826 "bucketId", ImageManager.CAMERA_IMAGE_BUCKET_ID).build(); 1827 Intent intent = new Intent(this, ReviewImage.class); 1828 intent.setData(targetUri); 1829 intent.putExtra(MediaStore.EXTRA_FULL_SCREEN, true); 1830 intent.putExtra(MediaStore.EXTRA_SHOW_ACTION_ICONS, true); 1831 intent.putExtra("com.android.camera.ReviewMode", true); 1832 try { 1833 startActivity(intent); 1834 } catch (ActivityNotFoundException ex) { 1835 Log.e(TAG, "review image fail", ex); 1836 } 1837 } else { 1838 Log.e(TAG, "Can't view last image."); 1839 } 1840 } 1841 1842 private void startReceivingLocationUpdates() { 1843 if (mLocationManager != null) { 1844 try { 1845 mLocationManager.requestLocationUpdates( 1846 LocationManager.NETWORK_PROVIDER, 1847 1000, 1848 0F, 1849 mLocationListeners[1]); 1850 } catch (java.lang.SecurityException ex) { 1851 Log.i(TAG, "fail to request location update, ignore", ex); 1852 } catch (IllegalArgumentException ex) { 1853 Log.d(TAG, "provider does not exist " + ex.getMessage()); 1854 } 1855 try { 1856 mLocationManager.requestLocationUpdates( 1857 LocationManager.GPS_PROVIDER, 1858 1000, 1859 0F, 1860 mLocationListeners[0]); 1861 } catch (java.lang.SecurityException ex) { 1862 Log.i(TAG, "fail to request location update, ignore", ex); 1863 } catch (IllegalArgumentException ex) { 1864 Log.d(TAG, "provider does not exist " + ex.getMessage()); 1865 } 1866 } 1867 } 1868 1869 private void stopReceivingLocationUpdates() { 1870 if (mLocationManager != null) { 1871 for (int i = 0; i < mLocationListeners.length; i++) { 1872 try { 1873 mLocationManager.removeUpdates(mLocationListeners[i]); 1874 } catch (Exception ex) { 1875 Log.i(TAG, "fail to remove location listners, ignore", ex); 1876 } 1877 } 1878 } 1879 } 1880 1881 private Location getCurrentLocation() { 1882 // go in best to worst order 1883 for (int i = 0; i < mLocationListeners.length; i++) { 1884 Location l = mLocationListeners[i].current(); 1885 if (l != null) return l; 1886 } 1887 return null; 1888 } 1889 1890 private boolean isCameraIdle() { 1891 return mStatus == IDLE && mFocusState == FOCUS_NOT_STARTED; 1892 } 1893 1894 private boolean isImageCaptureIntent() { 1895 String action = getIntent().getAction(); 1896 return (MediaStore.ACTION_IMAGE_CAPTURE.equals(action)); 1897 } 1898 1899 private void setupCaptureParams() { 1900 Bundle myExtras = getIntent().getExtras(); 1901 if (myExtras != null) { 1902 mSaveUri = (Uri) myExtras.getParcelable(MediaStore.EXTRA_OUTPUT); 1903 mCropValue = myExtras.getString("crop"); 1904 } 1905 } 1906 1907 private void showPostCaptureAlert() { 1908 if (mIsImageCaptureIntent) { 1909 findViewById(R.id.shutter_button).setVisibility(View.INVISIBLE); 1910 int[] pickIds = {R.id.btn_retake, R.id.btn_done}; 1911 for (int id : pickIds) { 1912 View button = findViewById(id); 1913 ((View) button.getParent()).setVisibility(View.VISIBLE); 1914 } 1915 } 1916 } 1917 1918 private void hidePostCaptureAlert() { 1919 if (mIsImageCaptureIntent) { 1920 findViewById(R.id.shutter_button).setVisibility(View.VISIBLE); 1921 int[] pickIds = {R.id.btn_retake, R.id.btn_done}; 1922 for (int id : pickIds) { 1923 View button = findViewById(id); 1924 ((View) button.getParent()).setVisibility(View.GONE); 1925 } 1926 } 1927 } 1928 1929 private int calculatePicturesRemaining() { 1930 mPicturesRemaining = MenuHelper.calculatePicturesRemaining(); 1931 return mPicturesRemaining; 1932 } 1933 1934 @Override 1935 public boolean onPrepareOptionsMenu(Menu menu) { 1936 super.onPrepareOptionsMenu(menu); 1937 // Only show the menu when camera is idle. 1938 for (int i = 0; i < menu.size(); i++) { 1939 menu.getItem(i).setVisible(isCameraIdle()); 1940 } 1941 1942 return true; 1943 } 1944 1945 @Override 1946 public boolean onCreateOptionsMenu(Menu menu) { 1947 super.onCreateOptionsMenu(menu); 1948 1949 if (mIsImageCaptureIntent) { 1950 // No options menu for attach mode. 1951 return false; 1952 } else { 1953 addBaseMenuItems(menu); 1954 } 1955 return true; 1956 } 1957 1958 private void addBaseMenuItems(Menu menu) { 1959 MenuItem gallery = menu.add(Menu.NONE, Menu.NONE, 1960 MenuHelper.POSITION_GOTO_GALLERY, 1961 R.string.camera_gallery_photos_text) 1962 .setOnMenuItemClickListener(new OnMenuItemClickListener() { 1963 public boolean onMenuItemClick(MenuItem item) { 1964 gotoGallery(); 1965 return true; 1966 } 1967 }); 1968 gallery.setIcon(android.R.drawable.ic_menu_gallery); 1969 mGalleryItems.add(gallery); 1970 1971 MenuItem item = menu.add(Menu.NONE, Menu.NONE, 1972 MenuHelper.POSITION_CAMERA_SETTING, R.string.settings) 1973 .setOnMenuItemClickListener(new OnMenuItemClickListener() { 1974 public boolean onMenuItemClick(MenuItem item) { 1975 showOnScreenSettings(); 1976 return true; 1977 } 1978 }); 1979 item.setIcon(android.R.drawable.ic_menu_preferences); 1980 } 1981 1982 public boolean onSwitchChanged(Switcher source, boolean onOff) { 1983 if (onOff == SWITCH_VIDEO) { 1984 if (!isCameraIdle()) return false; 1985 MenuHelper.gotoVideoMode(this); 1986 finish(); 1987 } 1988 return true; 1989 } 1990 1991 public void onSharedPreferenceChanged( 1992 SharedPreferences preferences, String key) { 1993 // ignore the events after "onPause()" 1994 if (mPausing) return; 1995 1996 if (CameraSettings.KEY_RECORD_LOCATION.equals(key)) { 1997 mRecordLocation = preferences.getBoolean(key, false); 1998 if (mRecordLocation) { 1999 startReceivingLocationUpdates(); 2000 } else { 2001 stopReceivingLocationUpdates(); 2002 } 2003 } else { 2004 // All preferences except RECORD_LOCATION are camera parameters. 2005 // Call setCameraParameters to take effect now. 2006 setCameraParameters(); 2007 } 2008 } 2009 2010 @Override 2011 public void onUserInteraction() { 2012 super.onUserInteraction(); 2013 keepScreenOnAwhile(); 2014 } 2015 2016 private void resetScreenOn() { 2017 mHandler.removeMessages(CLEAR_SCREEN_DELAY); 2018 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 2019 } 2020 2021 private void keepScreenOnAwhile() { 2022 mHandler.removeMessages(CLEAR_SCREEN_DELAY); 2023 getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 2024 mHandler.sendEmptyMessageDelayed(CLEAR_SCREEN_DELAY, SCREEN_DELAY); 2025 } 2026} 2027 2028class FocusRectangle extends View { 2029 2030 @SuppressWarnings("unused") 2031 private static final String TAG = "FocusRectangle"; 2032 2033 public FocusRectangle(Context context, AttributeSet attrs) { 2034 super(context, attrs); 2035 } 2036 2037 private void setDrawable(int resid) { 2038 setBackgroundDrawable(getResources().getDrawable(resid)); 2039 } 2040 2041 public void showStart() { 2042 setDrawable(R.drawable.focus_focusing); 2043 } 2044 2045 public void showSuccess() { 2046 setDrawable(R.drawable.focus_focused); 2047 } 2048 2049 public void showFail() { 2050 setDrawable(R.drawable.focus_focus_failed); 2051 } 2052 2053 public void clear() { 2054 setBackgroundDrawable(null); 2055 } 2056} 2057