Camera.java revision 542fa8916296196b10d74b439304bd7fc5bf1cef
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.Display; 53import android.view.GestureDetector; 54import android.view.KeyEvent; 55import android.view.LayoutInflater; 56import android.view.Menu; 57import android.view.MenuItem; 58import android.view.MotionEvent; 59import android.view.OrientationEventListener; 60import android.view.SurfaceHolder; 61import android.view.SurfaceView; 62import android.view.View; 63import android.view.ViewGroup; 64import android.view.Window; 65import android.view.WindowManager; 66import android.view.MenuItem.OnMenuItemClickListener; 67import android.widget.ImageView; 68import android.widget.ZoomButtonsController; 69 70import com.android.camera.gallery.IImage; 71import com.android.camera.gallery.IImageList; 72 73import java.io.File; 74import java.io.FileNotFoundException; 75import java.io.FileOutputStream; 76import java.io.IOException; 77import java.io.OutputStream; 78import java.util.ArrayList; 79import java.util.Collections; 80import java.util.List; 81 82/** 83 * Activity of the Camera which used to see preview and take pictures. 84 */ 85public class Camera extends Activity implements View.OnClickListener, 86 ShutterButton.OnShutterButtonListener, SurfaceHolder.Callback, 87 Switcher.OnSwitchListener, OnScreenSettings.OnVisibilityChangedListener, 88 OnSharedPreferenceChangeListener { 89 90 private static final String TAG = "camera"; 91 92 private static final int CROP_MSG = 1; 93 private static final int FIRST_TIME_INIT = 2; 94 private static final int RESTART_PREVIEW = 3; 95 private static final int CLEAR_SCREEN_DELAY = 4; 96 97 private static final String GPS_MODE_ON = "on"; 98 private static final String GPS_MODE_OFF = "off"; 99 100 private static final int SCREEN_DELAY = 2 * 60 * 1000; 101 private static final int FOCUS_BEEP_VOLUME = 100; 102 103 private static final String SCENE_MODE_ON = "on"; 104 private static final String SCENE_MODE_OFF = "off"; 105 106 private double mZoomValue; // The current zoom value. 107 private double mZoomStep; 108 private double mZoomMax; 109 public static final double ZOOM_STEP_MIN = 0.25; 110 public static final String ZOOM_STOP = "stop"; 111 public static final String ZOOM_IMMEDIATE = "zoom-immediate"; 112 public static final String ZOOM_CONTINUOUS = "zoom-continuous"; 113 public static final double ZOOM_MIN = 1.0; 114 public static final String ZOOM_SPEED = "99"; 115 116 private Parameters mParameters; 117 private Parameters mInitialParameters; 118 119 // The non-standard parameter strings to communicate with camera driver. 120 // This will be removed in the future. 121 public static final String PARM_ZOOM_STATE = "mot-zoom-state"; 122 public static final String PARM_ZOOM_STEP = "mot-zoom-step"; 123 public static final String PARM_ZOOM_TO_LEVEL = "mot-zoom-to-level"; 124 public static final String PARM_ZOOM_SPEED = "mot-zoom-speed"; 125 public static final String PARM_ZOOM_MAX = "mot-max-picture-continuous-zoom"; 126 127 private OrientationEventListener mOrientationListener; 128 private int mLastOrientation = OrientationEventListener.ORIENTATION_UNKNOWN; 129 private SharedPreferences mPreferences; 130 131 private static final int IDLE = 1; 132 private static final int SNAPSHOT_IN_PROGRESS = 2; 133 134 private static final boolean SWITCH_CAMERA = true; 135 private static final boolean SWITCH_VIDEO = false; 136 137 private int mStatus = IDLE; 138 private static final String sTempCropFilename = "crop-temp"; 139 140 private android.hardware.Camera mCameraDevice; 141 private SurfaceView mSurfaceView; 142 private SurfaceHolder mSurfaceHolder = null; 143 private ShutterButton mShutterButton; 144 private FocusRectangle mFocusRectangle; 145 private IconIndicator mGpsIndicator; 146 private IconIndicator mFlashIndicator; 147 private IconIndicator mFocusIndicator; 148 private IconIndicator mWhitebalanceIndicator; 149 private IconIndicator mSceneModeIndicator; 150 private ToneGenerator mFocusToneGenerator; 151 private ZoomButtonsController mZoomButtons; 152 private GestureDetector mGestureDetector; 153 private Switcher mSwitcher; 154 private boolean mStartPreviewFail = false; 155 156 // mPostCaptureAlert, mLastPictureButton, mThumbController 157 // are non-null only if isImageCaptureIntent() is true. 158 private ImageView mLastPictureButton; 159 private ThumbnailController mThumbController; 160 161 // mCropValue and mSaveUri are used only if isImageCaptureIntent() is true. 162 private String mCropValue; 163 private Uri mSaveUri; 164 165 private ImageCapture mImageCapture = null; 166 167 private boolean mPreviewing; 168 private boolean mPausing; 169 private boolean mFirstTimeInitialized; 170 private boolean mIsImageCaptureIntent; 171 private boolean mRecordLocation; 172 173 private static final int FOCUS_NOT_STARTED = 0; 174 private static final int FOCUSING = 1; 175 private static final int FOCUSING_SNAP_ON_FINISH = 2; 176 private static final int FOCUS_SUCCESS = 3; 177 private static final int FOCUS_FAIL = 4; 178 private int mFocusState = FOCUS_NOT_STARTED; 179 180 private ContentResolver mContentResolver; 181 private boolean mDidRegister = false; 182 183 private final ArrayList<MenuItem> mGalleryItems = new ArrayList<MenuItem>(); 184 185 private LocationManager mLocationManager = null; 186 187 // Use OneShotPreviewCallback to measure the time between 188 // JpegPictureCallback and preview. 189 private final OneShotPreviewCallback mOneShotPreviewCallback = 190 new OneShotPreviewCallback(); 191 private final ShutterCallback mShutterCallback = new ShutterCallback(); 192 private final RawPictureCallback mRawPictureCallback = 193 new RawPictureCallback(); 194 private final AutoFocusCallback mAutoFocusCallback = 195 new AutoFocusCallback(); 196 private final ZoomCallback mZoomCallback = new ZoomCallback(); 197 // Use the ErrorCallback to capture the crash count 198 // on the mediaserver 199 private final ErrorCallback mErrorCallback = new ErrorCallback(); 200 201 private long mFocusStartTime; 202 private long mFocusCallbackTime; 203 private long mCaptureStartTime; 204 private long mShutterCallbackTime; 205 private long mRawPictureCallbackTime; 206 private long mJpegPictureCallbackTime; 207 private int mPicturesRemaining; 208 209 // These latency time are for the CameraLatency test. 210 public long mAutoFocusTime; 211 public long mShutterLag; 212 public long mShutterAndRawPictureCallbackTime; 213 public long mJpegPictureCallbackTimeLag; 214 public long mRawPictureAndJpegPictureCallbackTime; 215 216 // Add the media server tag 217 public static boolean mMediaServerDied = false; 218 // Focus mode. Options are pref_camera_focusmode_entryvalues. 219 private String mFocusMode; 220 221 private final Handler mHandler = new MainHandler(); 222 private OnScreenSettings mSettings; 223 224 /** 225 * This Handler is used to post message back onto the main thread of the 226 * application 227 */ 228 private class MainHandler extends Handler { 229 @Override 230 public void handleMessage(Message msg) { 231 switch (msg.what) { 232 case RESTART_PREVIEW: { 233 restartPreview(); 234 break; 235 } 236 237 case CLEAR_SCREEN_DELAY: { 238 getWindow().clearFlags( 239 WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 240 break; 241 } 242 243 case FIRST_TIME_INIT: { 244 initializeFirstTime(); 245 break; 246 } 247 } 248 } 249 } 250 251 // Snapshots can only be taken after this is called. It should be called 252 // once only. We could have done these things in onCreate() but we want to 253 // make preview screen appear as soon as possible. 254 private void initializeFirstTime() { 255 if (mFirstTimeInitialized) return; 256 257 // Create orientation listenter. This should be done first because it 258 // takes some time to get first orientation. 259 mOrientationListener = 260 new OrientationEventListener(Camera.this) { 261 @Override 262 public void onOrientationChanged(int orientation) { 263 // We keep the last known orientation. So if the user 264 // first orient the camera then point the camera to 265 // floor/sky, we still have the correct orientation. 266 if (orientation != ORIENTATION_UNKNOWN) { 267 mLastOrientation = orientation; 268 } 269 } 270 }; 271 mOrientationListener.enable(); 272 273 // Initialize location sevice. 274 mLocationManager = (LocationManager) 275 getSystemService(Context.LOCATION_SERVICE); 276 readPreference(); 277 if (mRecordLocation) startReceivingLocationUpdates(); 278 279 checkStorage(); 280 281 // Initialize last picture button. 282 mContentResolver = getContentResolver(); 283 if (!mIsImageCaptureIntent) { 284 findViewById(R.id.camera_switch).setOnClickListener(this); 285 mLastPictureButton = 286 (ImageView) findViewById(R.id.review_thumbnail); 287 mLastPictureButton.setOnClickListener(this); 288 mThumbController = new ThumbnailController( 289 getResources(), mLastPictureButton, mContentResolver); 290 mThumbController.loadData(ImageManager.getLastImageThumbPath()); 291 // Update last image thumbnail. 292 updateThumbnailButton(); 293 } 294 295 // Initialize shutter button. 296 mShutterButton = (ShutterButton) findViewById(R.id.shutter_button); 297 mShutterButton.setOnShutterButtonListener(this); 298 mShutterButton.setVisibility(View.VISIBLE); 299 300 mFocusRectangle = (FocusRectangle) findViewById(R.id.focus_rectangle); 301 updateFocusIndicator(); 302 303 // Initialize GPS indicator. 304 mGpsIndicator = (IconIndicator) findViewById(R.id.gps_icon); 305 306 ImageManager.ensureOSXCompatibleFolder(); 307 308 installIntentFilter(); 309 310 initializeFocusTone(); 311 312 initializeZoom(); 313 314 mFirstTimeInitialized = true; 315 } 316 317 private void updateThumbnailButton() { 318 // Update last image if URI is invalid and the storage is ready. 319 if (!mThumbController.isUriValid() && mPicturesRemaining >= 0) { 320 updateLastImage(); 321 } 322 mThumbController.updateDisplayIfNeeded(); 323 } 324 325 // If the activity is paused and resumed, this method will be called in 326 // onResume. 327 private void initializeSecondTime() { 328 // Start orientation listener as soon as possible because it takes 329 // some time to get first orientation. 330 mOrientationListener.enable(); 331 332 // Start location update if needed. 333 readPreference(); 334 if (mRecordLocation) startReceivingLocationUpdates(); 335 336 installIntentFilter(); 337 338 initializeFocusTone(); 339 340 checkStorage(); 341 342 if (mZoomButtons != null) { 343 mZoomValue = Double.parseDouble( 344 mParameters.get(PARM_ZOOM_TO_LEVEL)); 345 mCameraDevice.setZoomCallback(mZoomCallback); 346 } 347 348 if (!mIsImageCaptureIntent) { 349 updateThumbnailButton(); 350 } 351 } 352 353 private void initializeZoom() { 354 // Check if the phone has zoom capability. 355 String zoomState = mParameters.get(PARM_ZOOM_STATE); 356 if (zoomState == null) return; 357 358 mZoomValue = Double.parseDouble(mParameters.get(PARM_ZOOM_TO_LEVEL)); 359 mZoomMax = Double.parseDouble(mParameters.get(PARM_ZOOM_MAX)); 360 mZoomStep = Double.parseDouble(mParameters.get(PARM_ZOOM_STEP)); 361 mParameters.set(PARM_ZOOM_SPEED, ZOOM_SPEED); 362 mCameraDevice.setParameters(mParameters); 363 364 mGestureDetector = new GestureDetector(this, new ZoomGestureListener()); 365 mCameraDevice.setZoomCallback(mZoomCallback); 366 mZoomButtons = new ZoomButtonsController(mSurfaceView); 367 mZoomButtons.setAutoDismissed(true); 368 mZoomButtons.setZoomSpeed(100); 369 mZoomButtons.setOnZoomListener( 370 new ZoomButtonsController.OnZoomListener() { 371 public void onVisibilityChanged(boolean visible) { 372 if (visible) { 373 updateZoomButtonsEnabled(); 374 } 375 } 376 377 public void onZoom(boolean zoomIn) { 378 if (isZooming()) return; 379 380 if (zoomIn) { 381 if (mZoomValue < mZoomMax) { 382 zoomToLevel(ZOOM_CONTINUOUS, mZoomValue + mZoomStep); 383 } 384 } else { 385 if (mZoomValue > ZOOM_MIN) { 386 zoomToLevel(ZOOM_CONTINUOUS, mZoomValue - mZoomStep); 387 } 388 } 389 } 390 }); 391 } 392 393 public void onVisibilityChanged(boolean visible) { 394 // When the on-screen setting is not displayed, we show the gripper. 395 // When the on-screen setting is displayed, we hide the gripper. 396 int reverseVisibility = visible ? View.INVISIBLE : View.VISIBLE; 397 findViewById(R.id.btn_gripper).setVisibility(reverseVisibility); 398 findViewById(R.id.indicator_bar).setVisibility(reverseVisibility); 399 400 if (visible) { 401 mPreferences.registerOnSharedPreferenceChangeListener(this); 402 } else { 403 mPreferences.unregisterOnSharedPreferenceChangeListener(this); 404 } 405 } 406 407 private boolean isZooming() { 408 mParameters = mCameraDevice.getParameters(); 409 return "continuous".equals(mParameters.get(PARM_ZOOM_STATE)); 410 } 411 412 private void zoomToLevel(String type, double zoomValue) { 413 if (zoomValue > mZoomMax) zoomValue = mZoomMax; 414 if (zoomValue < ZOOM_MIN) zoomValue = ZOOM_MIN; 415 416 // If the application sets a unchanged zoom value, the driver will stuck 417 // at the zoom state. This is a work-around to ensure the state is at 418 // "stop". 419 mParameters.set(PARM_ZOOM_STATE, ZOOM_STOP); 420 mCameraDevice.setParameters(mParameters); 421 422 mParameters.set(PARM_ZOOM_TO_LEVEL, Double.toString(zoomValue)); 423 mParameters.set(PARM_ZOOM_STATE, type); 424 mCameraDevice.setParameters(mParameters); 425 426 if (ZOOM_IMMEDIATE.equals(type)) mZoomValue = zoomValue; 427 } 428 429 private void updateZoomButtonsEnabled() { 430 mZoomButtons.setZoomInEnabled(mZoomValue < mZoomMax); 431 mZoomButtons.setZoomOutEnabled(mZoomValue > ZOOM_MIN); 432 } 433 434 private class ZoomGestureListener extends 435 GestureDetector.SimpleOnGestureListener { 436 @Override 437 public boolean onDown(MotionEvent e) { 438 // Show zoom buttons only when preview is started and snapshot 439 // is not in progress. mZoomButtons may be null if it is not 440 // initialized. 441 if (!mPausing && isCameraIdle() && mPreviewing 442 && mZoomButtons != null) { 443 mZoomButtons.setVisible(true); 444 } 445 return true; 446 } 447 448 @Override 449 public boolean onDoubleTap(MotionEvent e) { 450 // Perform zoom only when preview is started and snapshot is not in 451 // progress. 452 if (mPausing || !isCameraIdle() || !mPreviewing 453 || mZoomButtons == null || isZooming()) { 454 return false; 455 } 456 457 if (mZoomValue < mZoomMax) { 458 // Zoom in to the maximum. 459 while (mZoomValue < mZoomMax) { 460 zoomToLevel(ZOOM_IMMEDIATE, mZoomValue + ZOOM_STEP_MIN); 461 // Wait for a while so we are not changing zoom too fast. 462 try { 463 Thread.sleep(5); 464 } catch (InterruptedException ex) { 465 } 466 } 467 } else { 468 // Zoom out to the minimum. 469 while (mZoomValue > ZOOM_MIN) { 470 zoomToLevel(ZOOM_IMMEDIATE, mZoomValue - ZOOM_STEP_MIN); 471 // Wait for a while so we are not changing zoom too fast. 472 try { 473 Thread.sleep(5); 474 } catch (InterruptedException ex) { 475 } 476 } 477 } 478 updateZoomButtonsEnabled(); 479 return true; 480 } 481 } 482 483 @Override 484 public boolean dispatchTouchEvent(MotionEvent m) { 485 if (!super.dispatchTouchEvent(m) && mGestureDetector != null) { 486 return mGestureDetector.onTouchEvent(m); 487 } 488 return true; 489 } 490 491 LocationListener [] mLocationListeners = new LocationListener[] { 492 new LocationListener(LocationManager.GPS_PROVIDER), 493 new LocationListener(LocationManager.NETWORK_PROVIDER) 494 }; 495 496 private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 497 @Override 498 public void onReceive(Context context, Intent intent) { 499 String action = intent.getAction(); 500 if (action.equals(Intent.ACTION_MEDIA_MOUNTED) 501 || action.equals(Intent.ACTION_MEDIA_UNMOUNTED) 502 || action.equals(Intent.ACTION_MEDIA_CHECKING) 503 || action.equals(Intent.ACTION_MEDIA_SCANNER_STARTED)) { 504 checkStorage(); 505 } else if (action.equals(Intent.ACTION_MEDIA_SCANNER_FINISHED)) { 506 checkStorage(); 507 if (!mIsImageCaptureIntent) { 508 updateThumbnailButton(); 509 } 510 } 511 } 512 }; 513 514 private class LocationListener 515 implements android.location.LocationListener { 516 Location mLastLocation; 517 boolean mValid = false; 518 String mProvider; 519 520 public LocationListener(String provider) { 521 mProvider = provider; 522 mLastLocation = new Location(mProvider); 523 } 524 525 public void onLocationChanged(Location newLocation) { 526 if (newLocation.getLatitude() == 0.0 527 && newLocation.getLongitude() == 0.0) { 528 // Hack to filter out 0.0,0.0 locations 529 return; 530 } 531 // If GPS is available before start camera, we won't get status 532 // update so update GPS indicator when we receive data. 533 if (mRecordLocation 534 && LocationManager.GPS_PROVIDER.equals(mProvider)) { 535 mGpsIndicator.setMode(GPS_MODE_ON); 536 } 537 mLastLocation.set(newLocation); 538 mValid = true; 539 } 540 541 public void onProviderEnabled(String provider) { 542 } 543 544 public void onProviderDisabled(String provider) { 545 mValid = false; 546 } 547 548 public void onStatusChanged( 549 String provider, int status, Bundle extras) { 550 switch(status) { 551 case LocationProvider.OUT_OF_SERVICE: 552 case LocationProvider.TEMPORARILY_UNAVAILABLE: { 553 mValid = false; 554 if (mRecordLocation && 555 LocationManager.GPS_PROVIDER.equals(provider)) { 556 mGpsIndicator.setMode(GPS_MODE_OFF); 557 } 558 break; 559 } 560 } 561 } 562 563 public Location current() { 564 return mValid ? mLastLocation : null; 565 } 566 } 567 568 private final class OneShotPreviewCallback 569 implements android.hardware.Camera.PreviewCallback { 570 public void onPreviewFrame(byte[] data, 571 android.hardware.Camera camera) { 572 long now = System.currentTimeMillis(); 573 if (mJpegPictureCallbackTime != 0) { 574 mJpegPictureCallbackTimeLag = now - mJpegPictureCallbackTime; 575 Log.v(TAG, "mJpegPictureCallbackTimeLag = " 576 + mJpegPictureCallbackTimeLag + "ms"); 577 mJpegPictureCallbackTime = 0; 578 } else { 579 Log.v(TAG, "Got first frame"); 580 } 581 } 582 } 583 584 private final class ShutterCallback 585 implements android.hardware.Camera.ShutterCallback { 586 public void onShutter() { 587 mShutterCallbackTime = System.currentTimeMillis(); 588 mShutterLag = mShutterCallbackTime - mCaptureStartTime; 589 Log.v(TAG, "mShutterLag = " + mShutterLag + "ms"); 590 clearFocusState(); 591 } 592 } 593 594 private final class RawPictureCallback implements PictureCallback { 595 public void onPictureTaken( 596 byte [] rawData, android.hardware.Camera camera) { 597 mRawPictureCallbackTime = System.currentTimeMillis(); 598 mShutterAndRawPictureCallbackTime = 599 mRawPictureCallbackTime - mShutterCallbackTime; 600 Log.v(TAG, "mShutterAndRawPictureCallbackTime = " 601 + mShutterAndRawPictureCallbackTime + "ms"); 602 } 603 } 604 605 private final class JpegPictureCallback implements PictureCallback { 606 Location mLocation; 607 608 public JpegPictureCallback(Location loc) { 609 mLocation = loc; 610 } 611 612 public void onPictureTaken( 613 final byte [] jpegData, final android.hardware.Camera camera) { 614 if (mPausing) { 615 return; 616 } 617 618 mJpegPictureCallbackTime = System.currentTimeMillis(); 619 mRawPictureAndJpegPictureCallbackTime = 620 mJpegPictureCallbackTime - mRawPictureCallbackTime; 621 Log.v(TAG, "mRawPictureAndJpegPictureCallbackTime = " 622 + mRawPictureAndJpegPictureCallbackTime + "ms"); 623 mImageCapture.storeImage(jpegData, camera, mLocation); 624 625 if (!mIsImageCaptureIntent) { 626 long delay = 1200 - ( 627 System.currentTimeMillis() - mRawPictureCallbackTime); 628 mHandler.sendEmptyMessageDelayed( 629 RESTART_PREVIEW, Math.max(delay, 0)); 630 } 631 } 632 } 633 634 private final class AutoFocusCallback 635 implements android.hardware.Camera.AutoFocusCallback { 636 public void onAutoFocus( 637 boolean focused, android.hardware.Camera camera) { 638 mFocusCallbackTime = System.currentTimeMillis(); 639 mAutoFocusTime = mFocusCallbackTime - mFocusStartTime; 640 Log.v(TAG, "mAutoFocusTime = " + mAutoFocusTime + "ms"); 641 if (mFocusState == FOCUSING_SNAP_ON_FINISH) { 642 // Take the picture no matter focus succeeds or fails. No need 643 // to play the AF sound if we're about to play the shutter 644 // sound. 645 if (focused) { 646 mFocusState = FOCUS_SUCCESS; 647 } else { 648 mFocusState = FOCUS_FAIL; 649 } 650 mImageCapture.onSnap(); 651 } else if (mFocusState == FOCUSING) { 652 // User is half-pressing the focus key. Play the focus tone. 653 // Do not take the picture now. 654 ToneGenerator tg = mFocusToneGenerator; 655 if (tg != null) { 656 tg.startTone(ToneGenerator.TONE_PROP_BEEP2); 657 } 658 if (focused) { 659 mFocusState = FOCUS_SUCCESS; 660 } else { 661 mFocusState = FOCUS_FAIL; 662 } 663 } else if (mFocusState == FOCUS_NOT_STARTED) { 664 // User has released the focus key before focus completes. 665 // Do nothing. 666 } 667 updateFocusIndicator(); 668 } 669 } 670 671 private final class ErrorCallback 672 implements android.hardware.Camera.ErrorCallback { 673 public void onError(int error, android.hardware.Camera camera) { 674 if (error == android.hardware.Camera.CAMERA_ERROR_SERVER_DIED) { 675 mMediaServerDied = true; 676 Log.v(TAG, "media server died"); 677 } 678 } 679 } 680 681 private final class ZoomCallback 682 implements android.hardware.Camera.ZoomCallback { 683 public void onZoomUpdate(int zoomLevel, 684 android.hardware.Camera camera) { 685 mZoomValue = (double) zoomLevel / 1000; 686 Log.v(TAG, "ZoomCallback: zoom level=" + zoomLevel); 687 updateZoomButtonsEnabled(); 688 } 689 } 690 691 private class ImageCapture { 692 693 private boolean mCancel = false; 694 695 private Uri mLastContentUri; 696 697 byte[] mCaptureOnlyData; 698 699 // Returns the rotation degree in the jpeg header. 700 private int storeImage(byte[] data, Location loc) { 701 try { 702 long dateTaken = System.currentTimeMillis(); 703 String name = createName(dateTaken) + ".jpg"; 704 int[] degree = new int[1]; 705 mLastContentUri = ImageManager.addImage( 706 mContentResolver, 707 name, 708 dateTaken, 709 loc, // location from gps/network 710 ImageManager.CAMERA_IMAGE_BUCKET_NAME, name, 711 null, data, 712 degree); 713 if (mLastContentUri == null) { 714 // this means we got an error 715 mCancel = true; 716 } 717 if (!mCancel) { 718 ImageManager.setImageSize(mContentResolver, mLastContentUri, 719 new File(ImageManager.CAMERA_IMAGE_BUCKET_NAME, 720 name).length()); 721 } 722 return degree[0]; 723 } catch (Exception ex) { 724 Log.e(TAG, "Exception while compressing image.", ex); 725 return 0; 726 } 727 } 728 729 public void storeImage(final byte[] data, 730 android.hardware.Camera camera, Location loc) { 731 if (!mIsImageCaptureIntent) { 732 int degree = storeImage(data, loc); 733 sendBroadcast(new Intent( 734 "com.android.camera.NEW_PICTURE", mLastContentUri)); 735 setLastPictureThumb(data, degree, 736 mImageCapture.getLastCaptureUri()); 737 mThumbController.updateDisplayIfNeeded(); 738 } else { 739 mCaptureOnlyData = data; 740 showPostCaptureAlert(); 741 } 742 } 743 744 /** 745 * Initiate the capture of an image. 746 */ 747 public void initiate() { 748 if (mCameraDevice == null) { 749 return; 750 } 751 752 mCancel = false; 753 754 capture(); 755 } 756 757 public Uri getLastCaptureUri() { 758 return mLastContentUri; 759 } 760 761 public byte[] getLastCaptureData() { 762 return mCaptureOnlyData; 763 } 764 765 private void capture() { 766 mCaptureOnlyData = null; 767 768 // Set rotation. 769 int orientation = mLastOrientation; 770 if (orientation != OrientationEventListener.ORIENTATION_UNKNOWN) { 771 orientation += 90; 772 } 773 orientation = ImageManager.roundOrientation(orientation); 774 Log.v(TAG, "mLastOrientation = " + mLastOrientation 775 + ", orientation = " + orientation); 776 mParameters.setRotation(orientation); 777 778 // Clear previous GPS location from the parameters. 779 mParameters.removeGpsData(); 780 781 // Set GPS location. 782 Location loc = mRecordLocation ? getCurrentLocation() : null; 783 if (loc != null) { 784 double lat = loc.getLatitude(); 785 double lon = loc.getLongitude(); 786 boolean hasLatLon = (lat != 0.0d) || (lon != 0.0d); 787 788 if (hasLatLon) { 789 mParameters.setGpsLatitude(lat); 790 mParameters.setGpsLongitude(lon); 791 if (loc.hasAltitude()) { 792 mParameters.setGpsAltitude(loc.getAltitude()); 793 } else { 794 // for NETWORK_PROVIDER location provider, we may have 795 // no altitude information, but the driver needs it, so 796 // we fake one. 797 mParameters.setGpsAltitude(0); 798 } 799 if (loc.getTime() != 0) { 800 // Location.getTime() is UTC in milliseconds. 801 // gps-timestamp is UTC in seconds. 802 long utcTimeSeconds = loc.getTime() / 1000; 803 mParameters.setGpsTimestamp(utcTimeSeconds); 804 } 805 } else { 806 loc = null; 807 } 808 } 809 810 mCameraDevice.setParameters(mParameters); 811 812 mCameraDevice.takePicture(mShutterCallback, mRawPictureCallback, 813 new JpegPictureCallback(loc)); 814 mPreviewing = false; 815 } 816 817 public void onSnap() { 818 // If we are already in the middle of taking a snapshot then ignore. 819 if (mPausing || mStatus == SNAPSHOT_IN_PROGRESS) { 820 return; 821 } 822 mCaptureStartTime = System.currentTimeMillis(); 823 824 // Don't check the filesystem here, we can't afford the latency. 825 // Instead, check the cached value which was calculated when the 826 // preview was restarted. 827 if (mPicturesRemaining < 1) { 828 updateStorageHint(mPicturesRemaining); 829 return; 830 } 831 832 mStatus = SNAPSHOT_IN_PROGRESS; 833 834 mImageCapture.initiate(); 835 } 836 837 private void clearLastData() { 838 mCaptureOnlyData = null; 839 } 840 } 841 842 public boolean saveDataToFile(String filePath, byte[] data) { 843 FileOutputStream f = null; 844 try { 845 f = new FileOutputStream(filePath); 846 f.write(data); 847 } catch (IOException e) { 848 return false; 849 } finally { 850 MenuHelper.closeSilently(f); 851 } 852 return true; 853 } 854 855 private void setLastPictureThumb(byte[] data, int degree, Uri uri) { 856 BitmapFactory.Options options = new BitmapFactory.Options(); 857 options.inSampleSize = 16; 858 Bitmap lastPictureThumb = 859 BitmapFactory.decodeByteArray(data, 0, data.length, options); 860 lastPictureThumb = Util.rotate(lastPictureThumb, degree); 861 mThumbController.setData(uri, lastPictureThumb); 862 } 863 864 private static String createName(long dateTaken) { 865 return DateFormat.format("yyyy-MM-dd kk.mm.ss", dateTaken).toString(); 866 } 867 868 @Override 869 public void onCreate(Bundle icicle) { 870 super.onCreate(icicle); 871 872 Window win = getWindow(); 873 win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 874 setContentView(R.layout.camera); 875 mSurfaceView = (SurfaceView) findViewById(R.id.camera_preview); 876 877 mPreferences = PreferenceManager.getDefaultSharedPreferences(this); 878 879 /* 880 * To reduce startup time, we start the preview in another thread. 881 * We make sure the preview is started at the end of onCreate. 882 */ 883 Thread startPreviewThread = new Thread(new Runnable() { 884 public void run() { 885 try { 886 mStartPreviewFail = false; 887 startPreview(); 888 } catch (CameraHardwareException e) { 889 // In eng build, we throw the exception so that test tool 890 // can detect it and report it 891 if ("eng".equals(Build.TYPE)) { 892 throw new RuntimeException(e); 893 } 894 mStartPreviewFail = true; 895 } 896 } 897 }); 898 startPreviewThread.start(); 899 900 // don't set mSurfaceHolder here. We have it set ONLY within 901 // surfaceChanged / surfaceDestroyed, other parts of the code 902 // assume that when it is set, the surface is also set. 903 SurfaceHolder holder = mSurfaceView.getHolder(); 904 holder.addCallback(this); 905 holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 906 907 mIsImageCaptureIntent = isImageCaptureIntent(); 908 if (mIsImageCaptureIntent) { 909 setupCaptureParams(); 910 } 911 912 LayoutInflater inflater = getLayoutInflater(); 913 914 ViewGroup rootView = (ViewGroup) findViewById(R.id.camera); 915 if (mIsImageCaptureIntent) { 916 View controlBar = inflater.inflate( 917 R.layout.attach_camera_control, rootView); 918 controlBar.findViewById(R.id.btn_cancel).setOnClickListener(this); 919 controlBar.findViewById(R.id.btn_retake).setOnClickListener(this); 920 controlBar.findViewById(R.id.btn_done).setOnClickListener(this); 921 } else { 922 inflater.inflate(R.layout.camera_control, rootView); 923 mSwitcher = ((Switcher) findViewById(R.id.camera_switch)); 924 mSwitcher.setOnSwitchListener(this); 925 mSwitcher.addTouchView(findViewById(R.id.camera_switch_set)); 926 } 927 findViewById(R.id.btn_gripper) 928 .setOnTouchListener(new GripperTouchListener()); 929 930 mFlashIndicator = (IconIndicator) findViewById(R.id.flash_icon); 931 mFocusIndicator = (IconIndicator) findViewById(R.id.focus_icon); 932 mSceneModeIndicator = (IconIndicator) findViewById(R.id.scenemode_icon); 933 mWhitebalanceIndicator = 934 (IconIndicator) findViewById(R.id.whitebalance_icon); 935 936 // Make sure preview is started. 937 try { 938 startPreviewThread.join(); 939 if (mStartPreviewFail) { 940 showCameraErrorAndFinish(); 941 return; 942 } 943 } catch (InterruptedException ex) { 944 // ignore 945 } 946 } 947 948 private class GripperTouchListener implements View.OnTouchListener { 949 public boolean onTouch(View view, MotionEvent event) { 950 switch (event.getAction()) { 951 case MotionEvent.ACTION_DOWN: 952 return true; 953 case MotionEvent.ACTION_UP: 954 showOnScreenSettings(); 955 return true; 956 } 957 return false; 958 } 959 } 960 961 @Override 962 public void onStart() { 963 super.onStart(); 964 if (!mIsImageCaptureIntent) { 965 mSwitcher.setSwitch(SWITCH_CAMERA); 966 } 967 } 968 969 private void checkStorage() { 970 if (ImageManager.isMediaScannerScanning(getContentResolver())) { 971 mPicturesRemaining = MenuHelper.NO_STORAGE_ERROR; 972 } else { 973 calculatePicturesRemaining(); 974 } 975 updateStorageHint(mPicturesRemaining); 976 } 977 978 979 private void showOnScreenSettings() { 980 if (mSettings == null) { 981 mSettings = new OnScreenSettings( 982 findViewById(R.id.camera_preview)); 983 CameraSettings helper = 984 new CameraSettings(this, mInitialParameters); 985 mSettings.setPreferenceScreen(helper 986 .getPreferenceScreen(R.xml.camera_preferences)); 987 mSettings.setOnVisibilityChangedListener(this); 988 989 String sceneMode = mParameters.getSceneMode(); 990 if (sceneMode == null 991 || Parameters.SCENE_MODE_AUTO.equals(sceneMode)) { 992 // If scene mode is auto, cancel override in settings 993 mSettings.overrideSettings(CameraSettings.KEY_FLASH_MODE, null); 994 mSettings.overrideSettings(CameraSettings.KEY_FOCUS_MODE, null); 995 mSettings.overrideSettings( 996 CameraSettings.KEY_WHITE_BALANCE, null); 997 } else { 998 // If scene mode is not auto, override the value in settings 999 mSettings.overrideSettings(CameraSettings.KEY_FLASH_MODE, 1000 mParameters.getFlashMode()); 1001 mSettings.overrideSettings(CameraSettings.KEY_FOCUS_MODE, 1002 mParameters.getFocusMode()); 1003 mSettings.overrideSettings(CameraSettings.KEY_WHITE_BALANCE, 1004 mParameters.getWhiteBalance()); 1005 } 1006 } 1007 1008 mSettings.setVisible(true); 1009 } 1010 1011 public void onClick(View v) { 1012 switch (v.getId()) { 1013 case R.id.btn_retake: 1014 hidePostCaptureAlert(); 1015 restartPreview(); 1016 break; 1017 case R.id.review_thumbnail: 1018 if (isCameraIdle()) { 1019 viewLastImage(); 1020 } 1021 break; 1022 case R.id.btn_done: 1023 doAttach(); 1024 break; 1025 case R.id.btn_cancel: 1026 doCancel(); 1027 } 1028 } 1029 1030 private Bitmap createCaptureBitmap(byte[] data) { 1031 // This is really stupid...we just want to read the orientation in 1032 // the jpeg header. 1033 String filepath = ImageManager.getTempJpegPath(); 1034 int degree = 0; 1035 if (saveDataToFile(filepath, data)) { 1036 degree = ImageManager.getExifOrientation(filepath); 1037 new File(filepath).delete(); 1038 } 1039 1040 // Limit to 50k pixels so we can return it in the intent. 1041 Bitmap bitmap = Util.makeBitmap(data, 50*1024); 1042 bitmap = Util.rotate(bitmap, degree); 1043 return bitmap; 1044 } 1045 1046 private void doAttach() { 1047 if (mPausing) { 1048 return; 1049 } 1050 1051 byte[] data = mImageCapture.getLastCaptureData(); 1052 1053 if (mCropValue == null) { 1054 // First handle the no crop case -- just return the value. If the 1055 // caller specifies a "save uri" then write the data to it's 1056 // stream. Otherwise, pass back a scaled down version of the bitmap 1057 // directly in the extras. 1058 if (mSaveUri != null) { 1059 OutputStream outputStream = null; 1060 try { 1061 outputStream = mContentResolver.openOutputStream(mSaveUri); 1062 outputStream.write(data); 1063 outputStream.close(); 1064 1065 setResult(RESULT_OK); 1066 finish(); 1067 } catch (IOException ex) { 1068 // ignore exception 1069 } finally { 1070 Util.closeSilently(outputStream); 1071 } 1072 } else { 1073 Bitmap bitmap = createCaptureBitmap(data); 1074 setResult(RESULT_OK, 1075 new Intent("inline-data").putExtra("data", bitmap)); 1076 finish(); 1077 } 1078 } else { 1079 // Save the image to a temp file and invoke the cropper 1080 Uri tempUri = null; 1081 FileOutputStream tempStream = null; 1082 try { 1083 File path = getFileStreamPath(sTempCropFilename); 1084 path.delete(); 1085 tempStream = openFileOutput(sTempCropFilename, 0); 1086 tempStream.write(data); 1087 tempStream.close(); 1088 tempUri = Uri.fromFile(path); 1089 } catch (FileNotFoundException ex) { 1090 setResult(Activity.RESULT_CANCELED); 1091 finish(); 1092 return; 1093 } catch (IOException ex) { 1094 setResult(Activity.RESULT_CANCELED); 1095 finish(); 1096 return; 1097 } finally { 1098 Util.closeSilently(tempStream); 1099 } 1100 1101 Bundle newExtras = new Bundle(); 1102 if (mCropValue.equals("circle")) { 1103 newExtras.putString("circleCrop", "true"); 1104 } 1105 if (mSaveUri != null) { 1106 newExtras.putParcelable(MediaStore.EXTRA_OUTPUT, mSaveUri); 1107 } else { 1108 newExtras.putBoolean("return-data", true); 1109 } 1110 1111 Intent cropIntent = new Intent(); 1112 cropIntent.setClass(this, CropImage.class); 1113 cropIntent.setData(tempUri); 1114 cropIntent.putExtras(newExtras); 1115 1116 startActivityForResult(cropIntent, CROP_MSG); 1117 } 1118 } 1119 1120 private void doCancel() { 1121 setResult(RESULT_CANCELED, new Intent()); 1122 finish(); 1123 } 1124 1125 public void onShutterButtonFocus(ShutterButton button, boolean pressed) { 1126 if (mPausing) { 1127 return; 1128 } 1129 switch (button.getId()) { 1130 case R.id.shutter_button: 1131 doFocus(pressed); 1132 break; 1133 } 1134 } 1135 1136 public void onShutterButtonClick(ShutterButton button) { 1137 if (mPausing) { 1138 return; 1139 } 1140 switch (button.getId()) { 1141 case R.id.shutter_button: 1142 doSnap(); 1143 break; 1144 } 1145 } 1146 1147 private OnScreenHint mStorageHint; 1148 1149 private void updateStorageHint(int remaining) { 1150 String noStorageText = null; 1151 1152 if (remaining == MenuHelper.NO_STORAGE_ERROR) { 1153 String state = Environment.getExternalStorageState(); 1154 if (state == Environment.MEDIA_CHECKING || 1155 ImageManager.isMediaScannerScanning(getContentResolver())) { 1156 noStorageText = getString(R.string.preparing_sd); 1157 } else { 1158 noStorageText = getString(R.string.no_storage); 1159 } 1160 } else if (remaining < 1) { 1161 noStorageText = getString(R.string.not_enough_space); 1162 } 1163 1164 if (noStorageText != null) { 1165 if (mStorageHint == null) { 1166 mStorageHint = OnScreenHint.makeText(this, noStorageText); 1167 } else { 1168 mStorageHint.setText(noStorageText); 1169 } 1170 mStorageHint.show(); 1171 } else if (mStorageHint != null) { 1172 mStorageHint.cancel(); 1173 mStorageHint = null; 1174 } 1175 } 1176 1177 private void installIntentFilter() { 1178 // install an intent filter to receive SD card related events. 1179 IntentFilter intentFilter = 1180 new IntentFilter(Intent.ACTION_MEDIA_MOUNTED); 1181 intentFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED); 1182 intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED); 1183 intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED); 1184 intentFilter.addAction(Intent.ACTION_MEDIA_CHECKING); 1185 intentFilter.addDataScheme("file"); 1186 registerReceiver(mReceiver, intentFilter); 1187 mDidRegister = true; 1188 } 1189 1190 private void initializeFocusTone() { 1191 // Initialize focus tone generator. 1192 try { 1193 mFocusToneGenerator = new ToneGenerator( 1194 AudioManager.STREAM_SYSTEM, FOCUS_BEEP_VOLUME); 1195 } catch (Throwable ex) { 1196 Log.w(TAG, "Exception caught while creating tone generator: ", ex); 1197 mFocusToneGenerator = null; 1198 } 1199 } 1200 1201 private void readPreference() { 1202 mRecordLocation = mPreferences.getBoolean( 1203 "pref_camera_recordlocation_key", false); 1204 mFocusMode = mPreferences.getString( 1205 CameraSettings.KEY_FOCUS_MODE, 1206 getString(R.string.pref_camera_focusmode_default)); 1207 } 1208 1209 @Override 1210 public void onResume() { 1211 super.onResume(); 1212 1213 mPausing = false; 1214 mJpegPictureCallbackTime = 0; 1215 mImageCapture = new ImageCapture(); 1216 1217 // Start the preview if it is not started. 1218 if (!mPreviewing && !mStartPreviewFail) { 1219 try { 1220 startPreview(); 1221 } catch (CameraHardwareException e) { 1222 showCameraErrorAndFinish(); 1223 return; 1224 } 1225 } 1226 1227 if (mSurfaceHolder != null) { 1228 // If first time initialization is not finished, put it in the 1229 // message queue. 1230 if (!mFirstTimeInitialized) { 1231 mHandler.sendEmptyMessage(FIRST_TIME_INIT); 1232 } else { 1233 initializeSecondTime(); 1234 } 1235 } 1236 keepScreenOnAwhile(); 1237 } 1238 1239 private static ImageManager.DataLocation dataLocation() { 1240 return ImageManager.DataLocation.EXTERNAL; 1241 } 1242 1243 @Override 1244 protected void onPause() { 1245 mPausing = true; 1246 stopPreview(); 1247 // Close the camera now because other activities may need to use it. 1248 closeCamera(); 1249 resetScreenOn(); 1250 1251 if (mSettings != null && mSettings.isVisible()) { 1252 mSettings.setVisible(false); 1253 } 1254 1255 if (mFirstTimeInitialized) { 1256 mOrientationListener.disable(); 1257 mGpsIndicator.setMode(GPS_MODE_OFF); 1258 if (!mIsImageCaptureIntent) { 1259 mThumbController.storeData( 1260 ImageManager.getLastImageThumbPath()); 1261 } 1262 hidePostCaptureAlert(); 1263 } 1264 1265 if (mDidRegister) { 1266 unregisterReceiver(mReceiver); 1267 mDidRegister = false; 1268 } 1269 stopReceivingLocationUpdates(); 1270 1271 if (mFocusToneGenerator != null) { 1272 mFocusToneGenerator.release(); 1273 mFocusToneGenerator = null; 1274 } 1275 1276 if (mStorageHint != null) { 1277 mStorageHint.cancel(); 1278 mStorageHint = null; 1279 } 1280 1281 // If we are in an image capture intent and has taken 1282 // a picture, we just clear it in onPause. 1283 mImageCapture.clearLastData(); 1284 mImageCapture = null; 1285 1286 // This is necessary to make the ZoomButtonsController unregister 1287 // its configuration change receiver. 1288 if (mZoomButtons != null) { 1289 mZoomButtons.setVisible(false); 1290 } 1291 1292 // Remove the messages in the event queue. 1293 mHandler.removeMessages(RESTART_PREVIEW); 1294 mHandler.removeMessages(FIRST_TIME_INIT); 1295 1296 super.onPause(); 1297 } 1298 1299 @Override 1300 protected void onActivityResult( 1301 int requestCode, int resultCode, Intent data) { 1302 switch (requestCode) { 1303 case CROP_MSG: { 1304 Intent intent = new Intent(); 1305 if (data != null) { 1306 Bundle extras = data.getExtras(); 1307 if (extras != null) { 1308 intent.putExtras(extras); 1309 } 1310 } 1311 setResult(resultCode, intent); 1312 finish(); 1313 1314 File path = getFileStreamPath(sTempCropFilename); 1315 path.delete(); 1316 1317 break; 1318 } 1319 } 1320 } 1321 1322 private boolean canTakePicture() { 1323 return isCameraIdle() && mPreviewing && (mPicturesRemaining > 0); 1324 } 1325 1326 private void autoFocus() { 1327 // Initiate autofocus only when preview is started and snapshot is not 1328 // in progress. 1329 if (canTakePicture()) { 1330 Log.v(TAG, "Start autofocus."); 1331 if (mZoomButtons != null) mZoomButtons.setVisible(false); 1332 mFocusStartTime = System.currentTimeMillis(); 1333 mFocusState = FOCUSING; 1334 updateFocusIndicator(); 1335 mCameraDevice.autoFocus(mAutoFocusCallback); 1336 } 1337 } 1338 1339 private void cancelAutoFocus() { 1340 // User releases half-pressed focus key. 1341 if (mFocusState == FOCUSING || mFocusState == FOCUS_SUCCESS 1342 || mFocusState == FOCUS_FAIL) { 1343 Log.v(TAG, "Cancel autofocus."); 1344 mCameraDevice.cancelAutoFocus(); 1345 } 1346 if (mFocusState != FOCUSING_SNAP_ON_FINISH) { 1347 clearFocusState(); 1348 } 1349 } 1350 1351 private void clearFocusState() { 1352 mFocusState = FOCUS_NOT_STARTED; 1353 updateFocusIndicator(); 1354 } 1355 1356 private void updateFocusIndicator() { 1357 if (mFocusRectangle == null) return; 1358 1359 if (mFocusState == FOCUSING || mFocusState == FOCUSING_SNAP_ON_FINISH) { 1360 mFocusRectangle.showStart(); 1361 } else if (mFocusState == FOCUS_SUCCESS) { 1362 mFocusRectangle.showSuccess(); 1363 } else if (mFocusState == FOCUS_FAIL) { 1364 mFocusRectangle.showFail(); 1365 } else { 1366 mFocusRectangle.clear(); 1367 } 1368 } 1369 1370 @Override 1371 public void onBackPressed() { 1372 if (!isCameraIdle()) { 1373 // ignore backs while we're taking a picture 1374 return; 1375 } 1376 super.onBackPressed(); 1377 } 1378 1379 @Override 1380 public boolean onKeyDown(int keyCode, KeyEvent event) { 1381 switch (keyCode) { 1382 case KeyEvent.KEYCODE_FOCUS: 1383 if (mFirstTimeInitialized && event.getRepeatCount() == 0) { 1384 doFocus(true); 1385 } 1386 return true; 1387 case KeyEvent.KEYCODE_CAMERA: 1388 if (mFirstTimeInitialized && event.getRepeatCount() == 0) { 1389 doSnap(); 1390 } 1391 return true; 1392 case KeyEvent.KEYCODE_DPAD_CENTER: 1393 // If we get a dpad center event without any focused view, move 1394 // the focus to the shutter button and press it. 1395 if (mFirstTimeInitialized && event.getRepeatCount() == 0) { 1396 // Start auto-focus immediately to reduce shutter lag. After 1397 // the shutter button gets the focus, doFocus() will be 1398 // called again but it is fine. 1399 doFocus(true); 1400 if (mShutterButton.isInTouchMode()) { 1401 mShutterButton.requestFocusFromTouch(); 1402 } else { 1403 mShutterButton.requestFocus(); 1404 } 1405 mShutterButton.setPressed(true); 1406 } 1407 return true; 1408 } 1409 1410 return super.onKeyDown(keyCode, event); 1411 } 1412 1413 @Override 1414 public boolean onKeyUp(int keyCode, KeyEvent event) { 1415 switch (keyCode) { 1416 case KeyEvent.KEYCODE_FOCUS: 1417 if (mFirstTimeInitialized) { 1418 doFocus(false); 1419 } 1420 return true; 1421 case KeyEvent.KEYCODE_MENU: 1422 if (mIsImageCaptureIntent) { 1423 showOnScreenSettings(); 1424 return true; 1425 } 1426 break; 1427 } 1428 return super.onKeyUp(keyCode, event); 1429 } 1430 1431 private void doSnap() { 1432 Log.v(TAG, "doSnap: mFocusState=" + mFocusState); 1433 // If the user has half-pressed the shutter and focus is completed, we 1434 // can take the photo right away. If the focus mode is infinity, we can 1435 // also take the photo. 1436 if (mFocusMode.equals(Parameters.FOCUS_MODE_INFINITY) 1437 || (mFocusState == FOCUS_SUCCESS 1438 || mFocusState == FOCUS_FAIL)) { 1439 if (mZoomButtons != null) mZoomButtons.setVisible(false); 1440 mImageCapture.onSnap(); 1441 } else if (mFocusState == FOCUSING) { 1442 // Half pressing the shutter (i.e. the focus button event) will 1443 // already have requested AF for us, so just request capture on 1444 // focus here. 1445 mFocusState = FOCUSING_SNAP_ON_FINISH; 1446 } else if (mFocusState == FOCUS_NOT_STARTED) { 1447 // Focus key down event is dropped for some reasons. Just ignore. 1448 } 1449 } 1450 1451 private void doFocus(boolean pressed) { 1452 // Do the focus if the mode is not infinity. 1453 if (!mFocusMode.equals(Parameters.FOCUS_MODE_INFINITY)) { 1454 if (pressed) { // Focus key down. 1455 autoFocus(); 1456 } else { // Focus key up. 1457 cancelAutoFocus(); 1458 } 1459 } 1460 } 1461 1462 public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 1463 // Make sure we have a surface in the holder before proceeding. 1464 if (holder.getSurface() == null) { 1465 Log.d(TAG, "holder.getSurface() == null"); 1466 return; 1467 } 1468 1469 // The mCameraDevice will be null if it fails to connect to the camera 1470 // hardware. In this case we will show a dialog and then finish the 1471 // activity, so it's OK to ignore it. 1472 if (mCameraDevice == null) return; 1473 1474 mSurfaceHolder = holder; 1475 1476 // Sometimes surfaceChanged is called after onPause. Ignore it. 1477 if (mPausing || isFinishing()) return; 1478 1479 // Set preview display if the surface is being created. Preview was 1480 // already started. 1481 if (holder.isCreating()) { 1482 setPreviewDisplay(holder); 1483 } 1484 1485 // If first time initialization is not finished, send a message to do 1486 // it later. We want to finish surfaceChanged as soon as possible to let 1487 // user see preview first. 1488 if (!mFirstTimeInitialized) { 1489 mHandler.sendEmptyMessage(FIRST_TIME_INIT); 1490 } else { 1491 initializeSecondTime(); 1492 } 1493 } 1494 1495 public void surfaceCreated(SurfaceHolder holder) { 1496 } 1497 1498 public void surfaceDestroyed(SurfaceHolder holder) { 1499 stopPreview(); 1500 mSurfaceHolder = null; 1501 } 1502 1503 private void closeCamera() { 1504 if (mCameraDevice != null) { 1505 CameraHolder.instance().release(); 1506 mCameraDevice = null; 1507 mPreviewing = false; 1508 } 1509 } 1510 1511 private void ensureCameraDevice() throws CameraHardwareException { 1512 if (mCameraDevice == null) { 1513 mCameraDevice = CameraHolder.instance().open(); 1514 mInitialParameters = mCameraDevice.getParameters(); 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 // Because of bugs of overlay and layout, we sometimes will try to 1624 // layout the viewfinder in the portrait orientation and thus get the 1625 // wrong size of mSurfaceView. When we change the preview size, the 1626 // new overlay will be created before the old one closed, which causes 1627 // an exception. For now, just get the screen size 1628 1629 Display display = getWindowManager().getDefaultDisplay(); 1630 int targetHeight = Math.min(display.getHeight(), display.getWidth()); 1631 1632 if (targetHeight <= 0) { 1633 // We don't know the size of SurefaceView, use screen height 1634 WindowManager windowManager = (WindowManager) 1635 getSystemService(Context.WINDOW_SERVICE); 1636 targetHeight = windowManager.getDefaultDisplay().getHeight(); 1637 } 1638 1639 // Try to find an size match aspect ratio and size 1640 for (Size size : sizes) { 1641 double ratio = (double) size.width / size.height; 1642 if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue; 1643 if (Math.abs(size.height - targetHeight) < minDiff) { 1644 optimalSize = size; 1645 minDiff = Math.abs(size.height - targetHeight); 1646 } 1647 } 1648 1649 // Cannot find the one match the aspect ratio, ignore the requirement 1650 if (optimalSize == null) { 1651 Log.v(TAG, "No preview size match the aspect ratio"); 1652 minDiff = Double.MAX_VALUE; 1653 for (Size size : sizes) { 1654 if (Math.abs(size.height - targetHeight) < minDiff) { 1655 optimalSize = size; 1656 minDiff = Math.abs(size.height - targetHeight); 1657 } 1658 } 1659 } 1660 Log.v(TAG, String.format( 1661 "Optimal preview size is %sx%s", 1662 optimalSize.width, optimalSize.height)); 1663 return optimalSize; 1664 } 1665 1666 private static boolean isSupported(String value, List<String> supported) { 1667 return supported == null ? false : supported.indexOf(value) >= 0; 1668 } 1669 1670 private void setCameraParameters() { 1671 mParameters = mCameraDevice.getParameters(); 1672 1673 // Reset preview frame rate to the maximum because it may be lowered by 1674 // video camera application. 1675 List<Integer> frameRates = mParameters.getSupportedPreviewFrameRates(); 1676 if (frameRates != null) { 1677 Integer max = Collections.max(frameRates); 1678 mParameters.setPreviewFrameRate(max); 1679 } 1680 1681 // Set picture size. 1682 String pictureSize = mPreferences.getString( 1683 CameraSettings.KEY_PICTURE_SIZE, null); 1684 if (pictureSize == null) { 1685 CameraSettings.initialCameraPictureSize(this, mParameters); 1686 } else { 1687 List<Size> supported = mParameters.getSupportedPictureSizes(); 1688 CameraSettings.setCameraPictureSize( 1689 pictureSize, supported, mParameters); 1690 } 1691 1692 // Set the preview frame aspect ratio according to the picture size. 1693 Size size = mParameters.getPictureSize(); 1694 PreviewFrameLayout frameLayout = 1695 (PreviewFrameLayout) findViewById(R.id.frame_layout); 1696 frameLayout.setAspectRatio((double) size.width / size.height); 1697 1698 // Set a preview size that is closest to the viewfinder height and has 1699 // the right aspect ratio. 1700 List<Size> sizes = mParameters.getSupportedPreviewSizes(); 1701 Size optimalSize = getOptimalPreviewSize( 1702 sizes, (double) size.width / size.height); 1703 if (optimalSize != null) { 1704 mParameters.setPreviewSize(optimalSize.width, optimalSize.height); 1705 } 1706 1707 // Set JPEG quality. 1708 String jpegQuality = mPreferences.getString( 1709 CameraSettings.KEY_JPEG_QUALITY, 1710 getString(R.string.pref_camera_jpegquality_default)); 1711 mParameters.setJpegQuality(Integer.parseInt(jpegQuality)); 1712 1713 // For the following settings, we need to check if the settings are 1714 // still supported by latest driver, if not, ignore the settings. 1715 1716 // Set color effect parameter. 1717 String colorEffect = mPreferences.getString( 1718 CameraSettings.KEY_COLOR_EFFECT, 1719 getString(R.string.pref_camera_coloreffect_default)); 1720 if (isSupported(colorEffect, mParameters.getSupportedColorEffects())) { 1721 mParameters.setColorEffect(colorEffect); 1722 } 1723 1724 // Set scene mode. 1725 String sceneMode = mPreferences.getString( 1726 CameraSettings.KEY_SCENE_MODE, 1727 getString(R.string.pref_camera_scenemode_default)); 1728 if (isSupported(sceneMode, mParameters.getSupportedSceneModes())) { 1729 mParameters.setSceneMode(sceneMode); 1730 } else { 1731 sceneMode = mParameters.getSceneMode(); 1732 if (sceneMode == null) { 1733 sceneMode = Parameters.SCENE_MODE_AUTO; 1734 } 1735 } 1736 1737 // If scene mode is set, we cannot set flash mode, white balance, and 1738 // focus mode, instead, we read it from driver 1739 String flashMode; 1740 String whiteBalance; 1741 1742 if (!Parameters.SCENE_MODE_AUTO.equals(sceneMode)) { 1743 mCameraDevice.setParameters(mParameters); 1744 1745 // Setting scene mode will change the settings of flash mode, white 1746 // balance, and focus mode. So read back here, so that we know 1747 // what's the settings 1748 mParameters = mCameraDevice.getParameters(); 1749 flashMode = mParameters.getFlashMode(); 1750 whiteBalance = mParameters.getWhiteBalance(); 1751 mFocusMode = mParameters.getFocusMode(); 1752 if (mSettings != null) { 1753 mSettings.overrideSettings( 1754 CameraSettings.KEY_FLASH_MODE, flashMode); 1755 mSettings.overrideSettings( 1756 CameraSettings.KEY_WHITE_BALANCE, whiteBalance); 1757 mSettings.overrideSettings( 1758 CameraSettings.KEY_FOCUS_MODE, mFocusMode); 1759 } 1760 } else { 1761 if (mSettings != null) { 1762 mSettings.overrideSettings(CameraSettings.KEY_FLASH_MODE, null); 1763 mSettings.overrideSettings(CameraSettings.KEY_FOCUS_MODE, null); 1764 mSettings.overrideSettings( 1765 CameraSettings.KEY_WHITE_BALANCE, null); 1766 } 1767 1768 // Set flash mode. 1769 flashMode = mPreferences.getString( 1770 CameraSettings.KEY_FLASH_MODE, 1771 getString(R.string.pref_camera_flashmode_default)); 1772 List<String> supportedFlash = mParameters.getSupportedFlashModes(); 1773 if (isSupported(flashMode, supportedFlash)) { 1774 mParameters.setFlashMode(flashMode); 1775 } else { 1776 flashMode = mParameters.getFlashMode(); 1777 if (flashMode == null) { 1778 flashMode = Parameters.FLASH_MODE_OFF; 1779 } 1780 } 1781 1782 // Set white balance parameter. 1783 whiteBalance = mPreferences.getString( 1784 CameraSettings.KEY_WHITE_BALANCE, 1785 getString(R.string.pref_camera_whitebalance_default)); 1786 if (isSupported(whiteBalance, mParameters.getSupportedWhiteBalance())) { 1787 mParameters.setWhiteBalance(whiteBalance); 1788 } else { 1789 whiteBalance = mParameters.getWhiteBalance(); 1790 if (whiteBalance == null) { 1791 whiteBalance = Parameters.WHITE_BALANCE_AUTO; 1792 } 1793 } 1794 1795 // Set focus mode. 1796 mFocusMode = mPreferences.getString( 1797 CameraSettings.KEY_FOCUS_MODE, 1798 getString(R.string.pref_camera_focusmode_default)); 1799 if (isSupported(mFocusMode, mParameters.getSupportedFocusModes())) { 1800 mParameters.setFocusMode(mFocusMode); 1801 } else { 1802 mFocusMode = mParameters.getFocusMode(); 1803 if (mFocusMode == null) { 1804 mFocusMode = Parameters.FOCUS_MODE_AUTO; 1805 } 1806 } 1807 1808 mCameraDevice.setParameters(mParameters); 1809 } 1810 1811 // We post the runner because this function can be called from 1812 // non-UI thread (i.e., startPreviewThread). 1813 final String finalWhiteBalance = whiteBalance; 1814 final String finalFlashMode = flashMode; 1815 final String finalSceneMode = 1816 Parameters.SCENE_MODE_AUTO.equals(sceneMode) 1817 ? SCENE_MODE_OFF 1818 : SCENE_MODE_ON; 1819 1820 mHandler.post(new Runnable() { 1821 public void run() { 1822 mFocusIndicator.setMode(mFocusMode); 1823 mWhitebalanceIndicator.setMode(finalWhiteBalance); 1824 mSceneModeIndicator.setMode(finalSceneMode); 1825 mFlashIndicator.setMode(finalFlashMode); 1826 } 1827 }); 1828 } 1829 1830 private void gotoGallery() { 1831 MenuHelper.gotoCameraImageGallery(this); 1832 } 1833 1834 private void viewLastImage() { 1835 if (mThumbController.isUriValid()) { 1836 Uri targetUri = mThumbController.getUri(); 1837 targetUri = targetUri.buildUpon().appendQueryParameter( 1838 "bucketId", ImageManager.CAMERA_IMAGE_BUCKET_ID).build(); 1839 Intent intent = new Intent(this, ReviewImage.class); 1840 intent.setData(targetUri); 1841 intent.putExtra(MediaStore.EXTRA_FULL_SCREEN, true); 1842 intent.putExtra(MediaStore.EXTRA_SHOW_ACTION_ICONS, true); 1843 intent.putExtra("com.android.camera.ReviewMode", true); 1844 try { 1845 startActivity(intent); 1846 } catch (ActivityNotFoundException ex) { 1847 Log.e(TAG, "review image fail", ex); 1848 } 1849 } else { 1850 Log.e(TAG, "Can't view last image."); 1851 } 1852 } 1853 1854 private void startReceivingLocationUpdates() { 1855 if (mLocationManager != null) { 1856 try { 1857 mLocationManager.requestLocationUpdates( 1858 LocationManager.NETWORK_PROVIDER, 1859 1000, 1860 0F, 1861 mLocationListeners[1]); 1862 } catch (java.lang.SecurityException ex) { 1863 Log.i(TAG, "fail to request location update, ignore", ex); 1864 } catch (IllegalArgumentException ex) { 1865 Log.d(TAG, "provider does not exist " + ex.getMessage()); 1866 } 1867 try { 1868 mLocationManager.requestLocationUpdates( 1869 LocationManager.GPS_PROVIDER, 1870 1000, 1871 0F, 1872 mLocationListeners[0]); 1873 } catch (java.lang.SecurityException ex) { 1874 Log.i(TAG, "fail to request location update, ignore", ex); 1875 } catch (IllegalArgumentException ex) { 1876 Log.d(TAG, "provider does not exist " + ex.getMessage()); 1877 } 1878 } 1879 } 1880 1881 private void stopReceivingLocationUpdates() { 1882 if (mLocationManager != null) { 1883 for (int i = 0; i < mLocationListeners.length; i++) { 1884 try { 1885 mLocationManager.removeUpdates(mLocationListeners[i]); 1886 } catch (Exception ex) { 1887 Log.i(TAG, "fail to remove location listners, ignore", ex); 1888 } 1889 } 1890 } 1891 } 1892 1893 private Location getCurrentLocation() { 1894 // go in best to worst order 1895 for (int i = 0; i < mLocationListeners.length; i++) { 1896 Location l = mLocationListeners[i].current(); 1897 if (l != null) return l; 1898 } 1899 return null; 1900 } 1901 1902 private boolean isCameraIdle() { 1903 return mStatus == IDLE && mFocusState == FOCUS_NOT_STARTED; 1904 } 1905 1906 private boolean isImageCaptureIntent() { 1907 String action = getIntent().getAction(); 1908 return (MediaStore.ACTION_IMAGE_CAPTURE.equals(action)); 1909 } 1910 1911 private void setupCaptureParams() { 1912 Bundle myExtras = getIntent().getExtras(); 1913 if (myExtras != null) { 1914 mSaveUri = (Uri) myExtras.getParcelable(MediaStore.EXTRA_OUTPUT); 1915 mCropValue = myExtras.getString("crop"); 1916 } 1917 } 1918 1919 private void showPostCaptureAlert() { 1920 if (mIsImageCaptureIntent) { 1921 findViewById(R.id.shutter_button).setVisibility(View.INVISIBLE); 1922 int[] pickIds = {R.id.btn_retake, R.id.btn_done}; 1923 for (int id : pickIds) { 1924 View button = findViewById(id); 1925 ((View) button.getParent()).setVisibility(View.VISIBLE); 1926 } 1927 } 1928 } 1929 1930 private void hidePostCaptureAlert() { 1931 if (mIsImageCaptureIntent) { 1932 findViewById(R.id.shutter_button).setVisibility(View.VISIBLE); 1933 int[] pickIds = {R.id.btn_retake, R.id.btn_done}; 1934 for (int id : pickIds) { 1935 View button = findViewById(id); 1936 ((View) button.getParent()).setVisibility(View.GONE); 1937 } 1938 } 1939 } 1940 1941 private int calculatePicturesRemaining() { 1942 mPicturesRemaining = MenuHelper.calculatePicturesRemaining(); 1943 return mPicturesRemaining; 1944 } 1945 1946 @Override 1947 public boolean onPrepareOptionsMenu(Menu menu) { 1948 super.onPrepareOptionsMenu(menu); 1949 // Only show the menu when camera is idle. 1950 for (int i = 0; i < menu.size(); i++) { 1951 menu.getItem(i).setVisible(isCameraIdle()); 1952 } 1953 1954 return true; 1955 } 1956 1957 @Override 1958 public boolean onCreateOptionsMenu(Menu menu) { 1959 super.onCreateOptionsMenu(menu); 1960 1961 if (mIsImageCaptureIntent) { 1962 // No options menu for attach mode. 1963 return false; 1964 } else { 1965 addBaseMenuItems(menu); 1966 } 1967 return true; 1968 } 1969 1970 private void addBaseMenuItems(Menu menu) { 1971 MenuItem gallery = menu.add(Menu.NONE, Menu.NONE, 1972 MenuHelper.POSITION_GOTO_GALLERY, 1973 R.string.camera_gallery_photos_text) 1974 .setOnMenuItemClickListener(new OnMenuItemClickListener() { 1975 public boolean onMenuItemClick(MenuItem item) { 1976 gotoGallery(); 1977 return true; 1978 } 1979 }); 1980 gallery.setIcon(android.R.drawable.ic_menu_gallery); 1981 mGalleryItems.add(gallery); 1982 1983 MenuItem item = menu.add(Menu.NONE, Menu.NONE, 1984 MenuHelper.POSITION_CAMERA_SETTING, R.string.settings) 1985 .setOnMenuItemClickListener(new OnMenuItemClickListener() { 1986 public boolean onMenuItemClick(MenuItem item) { 1987 showOnScreenSettings(); 1988 return true; 1989 } 1990 }); 1991 item.setIcon(android.R.drawable.ic_menu_preferences); 1992 } 1993 1994 public boolean onSwitchChanged(Switcher source, boolean onOff) { 1995 if (onOff == SWITCH_VIDEO) { 1996 if (!isCameraIdle()) return false; 1997 MenuHelper.gotoVideoMode(this); 1998 finish(); 1999 } 2000 return true; 2001 } 2002 2003 public void onSharedPreferenceChanged( 2004 SharedPreferences preferences, String key) { 2005 // ignore the events after "onPause()" 2006 if (mPausing) return; 2007 2008 if (CameraSettings.KEY_RECORD_LOCATION.equals(key)) { 2009 mRecordLocation = preferences.getBoolean(key, false); 2010 if (mRecordLocation) { 2011 startReceivingLocationUpdates(); 2012 } else { 2013 stopReceivingLocationUpdates(); 2014 } 2015 } else { 2016 // All preferences except RECORD_LOCATION are camera parameters. 2017 // Call setCameraParameters to take effect now. 2018 setCameraParameters(); 2019 } 2020 } 2021 2022 @Override 2023 public void onUserInteraction() { 2024 super.onUserInteraction(); 2025 keepScreenOnAwhile(); 2026 } 2027 2028 private void resetScreenOn() { 2029 mHandler.removeMessages(CLEAR_SCREEN_DELAY); 2030 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 2031 } 2032 2033 private void keepScreenOnAwhile() { 2034 mHandler.removeMessages(CLEAR_SCREEN_DELAY); 2035 getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 2036 mHandler.sendEmptyMessageDelayed(CLEAR_SCREEN_DELAY, SCREEN_DELAY); 2037 } 2038} 2039 2040class FocusRectangle extends View { 2041 2042 @SuppressWarnings("unused") 2043 private static final String TAG = "FocusRectangle"; 2044 2045 public FocusRectangle(Context context, AttributeSet attrs) { 2046 super(context, attrs); 2047 } 2048 2049 private void setDrawable(int resid) { 2050 setBackgroundDrawable(getResources().getDrawable(resid)); 2051 } 2052 2053 public void showStart() { 2054 setDrawable(R.drawable.focus_focusing); 2055 } 2056 2057 public void showSuccess() { 2058 setDrawable(R.drawable.focus_focused); 2059 } 2060 2061 public void showFail() { 2062 setDrawable(R.drawable.focus_focus_failed); 2063 } 2064 2065 public void clear() { 2066 setBackgroundDrawable(null); 2067 } 2068} 2069