AppsCustomizePagedView.java revision d294526ad99db70d882a1e11f2b0f878524163fa
1/* 2 * Copyright (C) 2011 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.launcher2; 18 19import android.animation.AnimatorSet; 20import android.animation.ObjectAnimator; 21import android.animation.ValueAnimator; 22import android.appwidget.AppWidgetManager; 23import android.appwidget.AppWidgetProviderInfo; 24import android.content.ComponentName; 25import android.content.Context; 26import android.content.Intent; 27import android.content.pm.ActivityInfo; 28import android.content.pm.PackageManager; 29import android.content.pm.ResolveInfo; 30import android.content.res.Configuration; 31import android.content.res.Resources; 32import android.content.res.TypedArray; 33import android.graphics.Bitmap; 34import android.graphics.Bitmap.Config; 35import android.graphics.Canvas; 36import android.graphics.Rect; 37import android.graphics.drawable.Drawable; 38import android.os.AsyncTask; 39import android.os.Process; 40import android.util.AttributeSet; 41import android.util.Log; 42import android.view.LayoutInflater; 43import android.view.View; 44import android.view.ViewGroup; 45import android.view.animation.AccelerateInterpolator; 46import android.widget.GridLayout; 47import android.widget.ImageView; 48import android.widget.TextView; 49import android.widget.Toast; 50 51import com.android.launcher.R; 52import com.android.launcher2.DropTarget.DragObject; 53 54import java.util.ArrayList; 55import java.util.Collections; 56import java.util.Iterator; 57import java.util.List; 58 59/** 60 * A simple callback interface which also provides the results of the task. 61 */ 62interface AsyncTaskCallback { 63 void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data); 64} 65 66/** 67 * The data needed to perform either of the custom AsyncTasks. 68 */ 69class AsyncTaskPageData { 70 AsyncTaskPageData(int p, ArrayList<Object> l, ArrayList<Bitmap> si, AsyncTaskCallback bgR, 71 AsyncTaskCallback postR) { 72 page = p; 73 items = l; 74 sourceImages = si; 75 generatedImages = new ArrayList<Bitmap>(); 76 cellWidth = cellHeight = -1; 77 doInBackgroundCallback = bgR; 78 postExecuteCallback = postR; 79 } 80 AsyncTaskPageData(int p, ArrayList<Object> l, int cw, int ch, int ccx, AsyncTaskCallback bgR, 81 AsyncTaskCallback postR) { 82 page = p; 83 items = l; 84 generatedImages = new ArrayList<Bitmap>(); 85 cellWidth = cw; 86 cellHeight = ch; 87 cellCountX = ccx; 88 doInBackgroundCallback = bgR; 89 postExecuteCallback = postR; 90 } 91 int page; 92 ArrayList<Object> items; 93 ArrayList<Bitmap> sourceImages; 94 ArrayList<Bitmap> generatedImages; 95 int cellWidth; 96 int cellHeight; 97 int cellCountX; 98 AsyncTaskCallback doInBackgroundCallback; 99 AsyncTaskCallback postExecuteCallback; 100} 101 102/** 103 * A generic template for an async task used in AppsCustomize. 104 */ 105class AppsCustomizeAsyncTask extends AsyncTask<AsyncTaskPageData, Void, AsyncTaskPageData> { 106 AppsCustomizeAsyncTask(int p, AppsCustomizePagedView.ContentType t) { 107 page = p; 108 pageContentType = t; 109 threadPriority = Process.THREAD_PRIORITY_DEFAULT; 110 } 111 @Override 112 protected AsyncTaskPageData doInBackground(AsyncTaskPageData... params) { 113 if (params.length != 1) return null; 114 // Load each of the widget previews in the background 115 params[0].doInBackgroundCallback.run(this, params[0]); 116 return params[0]; 117 } 118 @Override 119 protected void onPostExecute(AsyncTaskPageData result) { 120 // All the widget previews are loaded, so we can just callback to inflate the page 121 result.postExecuteCallback.run(this, result); 122 } 123 124 void setThreadPriority(int p) { 125 threadPriority = p; 126 } 127 void syncThreadPriority() { 128 Process.setThreadPriority(threadPriority); 129 } 130 131 // The page that this async task is associated with 132 int page; 133 AppsCustomizePagedView.ContentType pageContentType; 134 int threadPriority; 135} 136 137/** 138 * The Apps/Customize page that displays all the applications, widgets, and shortcuts. 139 */ 140public class AppsCustomizePagedView extends PagedViewWithDraggableItems implements 141 AllAppsView, View.OnClickListener, DragSource { 142 static final String LOG_TAG = "AppsCustomizePagedView"; 143 144 /** 145 * The different content types that this paged view can show. 146 */ 147 public enum ContentType { 148 Applications, 149 Widgets 150 } 151 152 // Refs 153 private Launcher mLauncher; 154 private DragController mDragController; 155 private final LayoutInflater mLayoutInflater; 156 private final PackageManager mPackageManager; 157 158 // Content 159 private ContentType mContentType; 160 private ArrayList<ApplicationInfo> mApps; 161 private ArrayList<Object> mWidgets; 162 private ArrayList<Object> mShortcuts; 163 164 // Caching 165 private Canvas mCanvas; 166 private Drawable mDefaultWidgetBackground; 167 private IconCache mIconCache; 168 169 // Dimens 170 private int mContentWidth; 171 private int mAppIconSize; 172 private int mMaxWidgetSpan, mMinWidgetSpan; 173 private int mWidgetCountX, mWidgetCountY; 174 private int mWidgetWidthGap, mWidgetHeightGap; 175 private int mShortcutCountX, mShortcutCountY; 176 private int mShortcutWidthGap, mShortcutHeightGap; 177 private final int mWidgetPreviewIconPaddedDimension; 178 private final float sWidgetPreviewIconPaddingPercentage = 0.25f; 179 private PagedViewCellLayout mWidgetSpacingLayout; 180 181 // Previews & outlines 182 ArrayList<AppsCustomizeAsyncTask> mRunningTasks; 183 private HolographicOutlineHelper mHolographicOutlineHelper; 184 185 public AppsCustomizePagedView(Context context, AttributeSet attrs) { 186 super(context, attrs); 187 mLayoutInflater = LayoutInflater.from(context); 188 mPackageManager = context.getPackageManager(); 189 mContentType = ContentType.Applications; 190 mApps = new ArrayList<ApplicationInfo>(); 191 mWidgets = new ArrayList<Object>(); 192 mShortcuts = new ArrayList<Object>(); 193 mIconCache = ((LauncherApplication) context.getApplicationContext()).getIconCache(); 194 mHolographicOutlineHelper = new HolographicOutlineHelper(); 195 mCanvas = new Canvas(); 196 mRunningTasks = new ArrayList<AppsCustomizeAsyncTask>(); 197 198 // Save the default widget preview background 199 Resources resources = context.getResources(); 200 mDefaultWidgetBackground = resources.getDrawable(R.drawable.default_widget_preview); 201 mAppIconSize = getResources().getDimensionPixelSize(R.dimen.app_icon_size); 202 203 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PagedView, 0, 0); 204 // TODO-APPS_CUSTOMIZE: remove these unnecessary attrs after 205 mCellCountX = a.getInt(R.styleable.PagedView_cellCountX, 6); 206 mCellCountY = a.getInt(R.styleable.PagedView_cellCountY, 4); 207 a.recycle(); 208 a = context.obtainStyledAttributes(attrs, R.styleable.AppsCustomizePagedView, 0, 0); 209 mWidgetWidthGap = 210 a.getDimensionPixelSize(R.styleable.AppsCustomizePagedView_widgetCellWidthGap, 0); 211 mWidgetHeightGap = 212 a.getDimensionPixelSize(R.styleable.AppsCustomizePagedView_widgetCellHeightGap, 0); 213 mWidgetCountX = a.getInt(R.styleable.AppsCustomizePagedView_widgetCountX, 2); 214 mWidgetCountY = a.getInt(R.styleable.AppsCustomizePagedView_widgetCountY, 2); 215 a.recycle(); 216 mWidgetSpacingLayout = new PagedViewCellLayout(getContext()); 217 218 // The max widget span is the length N, such that NxN is the largest bounds that the widget 219 // preview can be before applying the widget scaling 220 mMinWidgetSpan = 1; 221 mMaxWidgetSpan = 3; 222 223 // The padding on the non-matched dimension for the default widget preview icons 224 // (top + bottom) 225 mWidgetPreviewIconPaddedDimension = 226 (int) (mAppIconSize * (1 + (2 * sWidgetPreviewIconPaddingPercentage))); 227 } 228 229 @Override 230 protected void init() { 231 super.init(); 232 mCenterPagesVertically = false; 233 234 Context context = getContext(); 235 Resources r = context.getResources(); 236 setDragSlopeThreshold(r.getInteger(R.integer.config_appsCustomizeDragSlopeThreshold)/100f); 237 } 238 239 @Override 240 protected void onWallpaperTap(android.view.MotionEvent ev) { 241 mLauncher.showWorkspace(true); 242 } 243 244 /** 245 * This differs from isDataReady as this is the test done if isDataReady is not set. 246 */ 247 private boolean testDataReady() { 248 // We only do this test once, and we default to the Applications page, so we only really 249 // have to wait for there to be apps. 250 return !mApps.isEmpty(); 251 } 252 253 protected void onDataReady(int width, int height) { 254 // Note that we transpose the counts in portrait so that we get a similar layout 255 boolean isLandscape = getResources().getConfiguration().orientation == 256 Configuration.ORIENTATION_LANDSCAPE; 257 int maxCellCountX = Integer.MAX_VALUE; 258 int maxCellCountY = Integer.MAX_VALUE; 259 if (LauncherApplication.isScreenLarge()) { 260 maxCellCountX = (isLandscape ? LauncherModel.getCellCountX() : 261 LauncherModel.getCellCountY()); 262 maxCellCountY = (isLandscape ? LauncherModel.getCellCountY() : 263 LauncherModel.getCellCountX()); 264 } 265 266 // Now that the data is ready, we can calculate the content width, the number of cells to 267 // use for each page 268 mWidgetSpacingLayout.setGap(mPageLayoutWidthGap, mPageLayoutHeightGap); 269 mWidgetSpacingLayout.setPadding(mPageLayoutPaddingLeft, mPageLayoutPaddingTop, 270 mPageLayoutPaddingRight, mPageLayoutPaddingBottom); 271 mWidgetSpacingLayout.calculateCellCount(width, height, maxCellCountX, maxCellCountY); 272 mCellCountX = mWidgetSpacingLayout.getCellCountX(); 273 mCellCountY = mWidgetSpacingLayout.getCellCountY(); 274 mWidgetCountX = Math.max(1, (int) Math.round(mCellCountX / 2f)); 275 mWidgetCountY = Math.max(1, (int) Math.round(mCellCountY / 3f)); 276 mShortcutCountX = Math.max(1, (int) Math.round(mCellCountX / 2f)); 277 mShortcutCountY = Math.max(1, (int) Math.round(mCellCountY / 2f)); 278 279 mContentWidth = mWidgetSpacingLayout.getContentWidth(); 280 281 invalidatePageData(); 282 } 283 284 @Override 285 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 286 int width = MeasureSpec.getSize(widthMeasureSpec); 287 int height = MeasureSpec.getSize(heightMeasureSpec); 288 if (!isDataReady()) { 289 if (testDataReady()) { 290 setDataIsReady(); 291 setMeasuredDimension(width, height); 292 onDataReady(width, height); 293 } 294 } 295 296 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 297 } 298 299 /** Removes and returns the ResolveInfo with the specified ComponentName */ 300 private ResolveInfo removeResolveInfoWithComponentName(List<ResolveInfo> list, 301 ComponentName cn) { 302 Iterator<ResolveInfo> iter = list.iterator(); 303 while (iter.hasNext()) { 304 ResolveInfo rinfo = iter.next(); 305 ActivityInfo info = rinfo.activityInfo; 306 ComponentName c = new ComponentName(info.packageName, info.name); 307 if (c.equals(cn)) { 308 iter.remove(); 309 return rinfo; 310 } 311 } 312 return null; 313 } 314 315 public void onPackagesUpdated() { 316 // Get the list of widgets and shortcuts 317 mWidgets.clear(); 318 mShortcuts.clear(); 319 List<AppWidgetProviderInfo> widgets = 320 AppWidgetManager.getInstance(mLauncher).getInstalledProviders(); 321 Collections.sort(widgets, 322 new LauncherModel.WidgetAndShortcutNameComparator(mPackageManager)); 323 Intent shortcutsIntent = new Intent(Intent.ACTION_CREATE_SHORTCUT); 324 List<ResolveInfo> shortcuts = mPackageManager.queryIntentActivities(shortcutsIntent, 0); 325 Collections.sort(shortcuts, 326 new LauncherModel.WidgetAndShortcutNameComparator(mPackageManager)); 327 mWidgets.addAll(widgets); 328 mShortcuts.addAll(shortcuts); 329 330 // The next layout pass will trigger data-ready if both widgets and apps are set, so request 331 // a layout to do this test and invalidate the page data when ready. 332 if (testDataReady()) requestLayout(); 333 } 334 335 @Override 336 public void onClick(View v) { 337 if (v instanceof PagedViewIcon) { 338 // Animate some feedback to the click 339 final ApplicationInfo appInfo = (ApplicationInfo) v.getTag(); 340 animateClickFeedback(v, new Runnable() { 341 @Override 342 public void run() { 343 mLauncher.startActivitySafely(appInfo.intent, appInfo); 344 } 345 }); 346 } else if (v instanceof PagedViewWidget) { 347 // Let the user know that they have to long press to add a widget 348 Toast.makeText(getContext(), R.string.long_press_widget_to_add, 349 Toast.LENGTH_SHORT).show(); 350 351 // Create a little animation to show that the widget can move 352 float offsetY = getResources().getDimensionPixelSize(R.dimen.dragViewOffsetY); 353 final ImageView p = (ImageView) v.findViewById(R.id.widget_preview); 354 AnimatorSet bounce = new AnimatorSet(); 355 ValueAnimator tyuAnim = ObjectAnimator.ofFloat(p, "translationY", offsetY); 356 tyuAnim.setDuration(125); 357 ValueAnimator tydAnim = ObjectAnimator.ofFloat(p, "translationY", 0f); 358 tydAnim.setDuration(100); 359 bounce.play(tyuAnim).before(tydAnim); 360 bounce.setInterpolator(new AccelerateInterpolator()); 361 bounce.start(); 362 } 363 } 364 365 /* 366 * PagedViewWithDraggableItems implementation 367 */ 368 @Override 369 protected void determineDraggingStart(android.view.MotionEvent ev) { 370 // Disable dragging by pulling an app down for now. 371 } 372 private void beginDraggingApplication(View v) { 373 // Make a copy of the ApplicationInfo 374 ApplicationInfo appInfo = new ApplicationInfo((ApplicationInfo) v.getTag()); 375 376 // Compose the drag image (top compound drawable, index is 1) 377 final TextView tv = (TextView) v; 378 final Drawable icon = tv.getCompoundDrawables()[1]; 379 Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight(), 380 Bitmap.Config.ARGB_8888); 381 mCanvas.setBitmap(b); 382 mCanvas.save(); 383 mCanvas.translate((v.getWidth() - icon.getIntrinsicWidth()) / 2, v.getPaddingTop()); 384 icon.draw(mCanvas); 385 mCanvas.restore(); 386 387 // Compose the visible rect of the drag image 388 Rect dragRect = null; 389 if (v instanceof TextView) { 390 int top = v.getPaddingTop(); 391 int left = (b.getWidth() - mAppIconSize) / 2; 392 int right = left + mAppIconSize; 393 int bottom = top + mAppIconSize; 394 dragRect = new Rect(left, top, right, bottom); 395 } 396 397 // Start the drag 398 mLauncher.lockScreenOrientation(); 399 mLauncher.getWorkspace().onDragStartedWithItemSpans(1, 1, b); 400 mDragController.startDrag(v, b, this, appInfo, DragController.DRAG_ACTION_COPY, dragRect); 401 b.recycle(); 402 } 403 private void beginDraggingWidget(View v) { 404 // Get the widget preview as the drag representation 405 ImageView image = (ImageView) v.findViewById(R.id.widget_preview); 406 PendingAddItemInfo createItemInfo = (PendingAddItemInfo) v.getTag(); 407 408 // Compose the drag image 409 Bitmap b; 410 Drawable preview = image.getDrawable(); 411 int w = preview.getIntrinsicWidth(); 412 int h = preview.getIntrinsicHeight(); 413 if (createItemInfo instanceof PendingAddWidgetInfo) { 414 PendingAddWidgetInfo createWidgetInfo = (PendingAddWidgetInfo) createItemInfo; 415 int[] spanXY = CellLayout.rectToCell(getResources(), 416 createWidgetInfo.minWidth, createWidgetInfo.minHeight, null); 417 createItemInfo.spanX = spanXY[0]; 418 createItemInfo.spanY = spanXY[1]; 419 420 b = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); 421 renderDrawableToBitmap(preview, b, 0, 0, w, h, 1, 1); 422 } else { 423 // Workaround for the fact that we don't keep the original ResolveInfo associated with 424 // the shortcut around. To get the icon, we just render the preview image (which has 425 // the shortcut icon) to a new drag bitmap that clips the non-icon space. 426 b = Bitmap.createBitmap(mWidgetPreviewIconPaddedDimension, 427 mWidgetPreviewIconPaddedDimension, Bitmap.Config.ARGB_8888); 428 mCanvas.setBitmap(b); 429 mCanvas.save(); 430 preview.draw(mCanvas); 431 mCanvas.restore(); 432 createItemInfo.spanX = createItemInfo.spanY = 1; 433 } 434 435 // Start the drag 436 mLauncher.lockScreenOrientation(); 437 mLauncher.getWorkspace().onDragStartedWithItemSpans(createItemInfo.spanX, 438 createItemInfo.spanY, b); 439 mDragController.startDrag(image, b, this, createItemInfo, 440 DragController.DRAG_ACTION_COPY, null); 441 b.recycle(); 442 } 443 @Override 444 protected boolean beginDragging(View v) { 445 if (!super.beginDragging(v)) return false; 446 447 448 if (v instanceof PagedViewIcon) { 449 beginDraggingApplication(v); 450 } else if (v instanceof PagedViewWidget) { 451 beginDraggingWidget(v); 452 } 453 454 // Go into spring loaded mode 455 int currentPageIndex = mLauncher.getWorkspace().getCurrentPage(); 456 CellLayout currentPage = (CellLayout) mLauncher.getWorkspace().getChildAt(currentPageIndex); 457 mLauncher.enterSpringLoadedDragMode(currentPage); 458 return true; 459 } 460 private void endDragging(boolean success) { 461 mLauncher.exitSpringLoadedDragMode(); 462 mLauncher.getWorkspace().onDragStopped(success); 463 mLauncher.unlockScreenOrientation(); 464 465 } 466 467 /* 468 * DragSource implementation 469 */ 470 @Override 471 public void onDragViewVisible() {} 472 @Override 473 public void onDropCompleted(View target, DragObject d, boolean success) { 474 endDragging(success); 475 476 // Display an error message if the drag failed due to there not being enough space on the 477 // target layout we were dropping on. 478 if (!success) { 479 boolean showOutOfSpaceMessage = false; 480 if (target instanceof Workspace) { 481 int currentScreen = mLauncher.getCurrentWorkspaceScreen(); 482 Workspace workspace = (Workspace) target; 483 CellLayout layout = (CellLayout) workspace.getChildAt(currentScreen); 484 ItemInfo itemInfo = (ItemInfo) d.dragInfo; 485 if (layout != null) { 486 layout.calculateSpans(itemInfo); 487 showOutOfSpaceMessage = 488 !layout.findCellForSpan(null, itemInfo.spanX, itemInfo.spanY); 489 } 490 } 491 // TODO-APPS_CUSTOMIZE: We need to handle this for folders as well later. 492 if (showOutOfSpaceMessage) { 493 mLauncher.showOutOfSpaceMessage(); 494 } 495 } 496 } 497 498 public void setContentType(ContentType type) { 499 mContentType = type; 500 setCurrentPage(0); 501 invalidatePageData(); 502 } 503 504 public boolean isContentType(ContentType type) { 505 return (mContentType == type); 506 } 507 508 /* 509 * Apps PagedView implementation 510 */ 511 private void setVisibilityOnChildren(ViewGroup layout, int visibility) { 512 int childCount = layout.getChildCount(); 513 for (int i = 0; i < childCount; ++i) { 514 layout.getChildAt(i).setVisibility(visibility); 515 } 516 } 517 private void setupPage(PagedViewCellLayout layout) { 518 layout.setCellCount(mCellCountX, mCellCountY); 519 layout.setGap(mPageLayoutWidthGap, mPageLayoutHeightGap); 520 layout.setPadding(mPageLayoutPaddingLeft, mPageLayoutPaddingTop, 521 mPageLayoutPaddingRight, mPageLayoutPaddingBottom); 522 523 // Note: We force a measure here to get around the fact that when we do layout calculations 524 // immediately after syncing, we don't have a proper width. That said, we already know the 525 // expected page width, so we can actually optimize by hiding all the TextView-based 526 // children that are expensive to measure, and let that happen naturally later. 527 setVisibilityOnChildren(layout, View.GONE); 528 int widthSpec = MeasureSpec.makeMeasureSpec(getPageContentWidth(), MeasureSpec.AT_MOST); 529 int heightSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.AT_MOST); 530 layout.setMinimumWidth(getPageContentWidth()); 531 layout.measure(widthSpec, heightSpec); 532 setVisibilityOnChildren(layout, View.VISIBLE); 533 } 534 public void syncAppsPages() { 535 // Ensure that we have the right number of pages 536 Context context = getContext(); 537 int numPages = (int) Math.ceil((float) mApps.size() / (mCellCountX * mCellCountY)); 538 for (int i = 0; i < numPages; ++i) { 539 PagedViewCellLayout layout = new PagedViewCellLayout(context); 540 setupPage(layout); 541 addView(layout); 542 } 543 } 544 public void syncAppsPageItems(int page) { 545 // ensure that we have the right number of items on the pages 546 int numPages = getPageCount(); 547 int numCells = mCellCountX * mCellCountY; 548 int startIndex = page * numCells; 549 int endIndex = Math.min(startIndex + numCells, mApps.size()); 550 PagedViewCellLayout layout = (PagedViewCellLayout) getChildAt(page); 551 layout.removeAllViewsOnPage(); 552 ArrayList<Object> items = new ArrayList<Object>(); 553 ArrayList<Bitmap> images = new ArrayList<Bitmap>(); 554 for (int i = startIndex; i < endIndex; ++i) { 555 ApplicationInfo info = mApps.get(i); 556 PagedViewIcon icon = (PagedViewIcon) mLayoutInflater.inflate( 557 R.layout.apps_customize_application, layout, false); 558 icon.applyFromApplicationInfo(info, true, mHolographicOutlineHelper); 559 icon.setOnClickListener(this); 560 icon.setOnLongClickListener(this); 561 icon.setOnTouchListener(this); 562 563 int index = i - startIndex; 564 int x = index % mCellCountX; 565 int y = index / mCellCountX; 566 layout.addViewToCellLayout(icon, -1, i, new PagedViewCellLayout.LayoutParams(x,y, 1,1)); 567 568 items.add(info); 569 images.add(info.iconBitmap); 570 } 571 572 // Create the hardware layers 573 layout.allowHardwareLayerCreation(); 574 layout.createHardwareLayers(); 575 576 prepareGenerateHoloOutlinesTask(page, items, images); 577 } 578 579 /** 580 * Return the appropriate thread priority for loading for a given page (we give the current 581 * page much higher priority) 582 */ 583 private int getThreadPriorityForPage(int page) { 584 // TODO-APPS_CUSTOMIZE: detect number of cores and set thread priorities accordingly below 585 int pageDiff = Math.abs(page - mCurrentPage); 586 if (pageDiff <= 0) { 587 // return Process.THREAD_PRIORITY_DEFAULT; 588 return Process.THREAD_PRIORITY_MORE_FAVORABLE; 589 } else if (pageDiff <= 1) { 590 // return Process.THREAD_PRIORITY_BACKGROUND; 591 return Process.THREAD_PRIORITY_DEFAULT; 592 } else { 593 // return Process.THREAD_PRIORITY_LOWEST; 594 return Process.THREAD_PRIORITY_DEFAULT; 595 } 596 } 597 /** 598 * Creates and executes a new AsyncTask to load a page of widget previews. 599 */ 600 private void prepareLoadWidgetPreviewsTask(int page, ArrayList<Object> widgets, 601 int cellWidth, int cellHeight, int cellCountX) { 602 // Prune all tasks that are no longer needed 603 Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator(); 604 while (iter.hasNext()) { 605 AppsCustomizeAsyncTask task = (AppsCustomizeAsyncTask) iter.next(); 606 int taskPage = task.page; 607 if (taskPage < getAssociatedLowerPageBound(mCurrentPage) || 608 taskPage > getAssociatedUpperPageBound(mCurrentPage)) { 609 task.cancel(false); 610 iter.remove(); 611 } else { 612 task.setThreadPriority(getThreadPriorityForPage(taskPage)); 613 } 614 } 615 616 AsyncTaskPageData pageData = new AsyncTaskPageData(page, widgets, cellWidth, cellHeight, 617 cellCountX, new AsyncTaskCallback() { 618 @Override 619 public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) { 620 // Ensure that this task starts running at the correct priority 621 task.syncThreadPriority(); 622 623 // Load each of the widget/shortcut previews 624 ArrayList<Object> items = data.items; 625 ArrayList<Bitmap> images = data.generatedImages; 626 int count = items.size(); 627 int cellWidth = data.cellWidth; 628 int cellHeight = data.cellHeight; 629 for (int i = 0; i < count && !task.isCancelled(); ++i) { 630 // Before work on each item, ensure that this task is running at the correct 631 // priority 632 task.syncThreadPriority(); 633 634 Object rawInfo = items.get(i); 635 if (rawInfo instanceof AppWidgetProviderInfo) { 636 AppWidgetProviderInfo info = (AppWidgetProviderInfo) rawInfo; 637 int[] cellSpans = CellLayout.rectToCell(getResources(), 638 info.minWidth, info.minHeight, null); 639 images.add(getWidgetPreview(info, cellSpans[0],cellSpans[1], 640 cellWidth, cellHeight)); 641 } else if (rawInfo instanceof ResolveInfo) { 642 // Fill in the shortcuts information 643 ResolveInfo info = (ResolveInfo) rawInfo; 644 images.add(getShortcutPreview(info, cellWidth, cellHeight)); 645 } 646 } 647 } 648 }, 649 new AsyncTaskCallback() { 650 @Override 651 public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) { 652 mRunningTasks.remove(task); 653 if (task.page > getPageCount()) return; 654 if (task.pageContentType != mContentType) return; 655 onSyncWidgetPageItems(data); 656 } 657 }); 658 659 // Ensure that the task is appropriately prioritized and runs in parallel 660 AppsCustomizeAsyncTask t = new AppsCustomizeAsyncTask(page, mContentType); 661 t.setThreadPriority(getThreadPriorityForPage(page)); 662 t.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, pageData); 663 mRunningTasks.add(t); 664 } 665 /** 666 * Creates and executes a new AsyncTask to load the outlines for a page of content. 667 */ 668 private void prepareGenerateHoloOutlinesTask(int page, ArrayList<Object> items, 669 ArrayList<Bitmap> images) { 670 AsyncTaskPageData pageData = new AsyncTaskPageData(page, items, images, 671 new AsyncTaskCallback() { 672 @Override 673 public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) { 674 // Ensure that this task starts running at the correct priority 675 task.syncThreadPriority(); 676 677 ArrayList<Bitmap> images = data.generatedImages; 678 ArrayList<Bitmap> srcImages = data.sourceImages; 679 int count = srcImages.size(); 680 Canvas c = new Canvas(); 681 for (int i = 0; i < count && !task.isCancelled(); ++i) { 682 // Before work on each item, ensure that this task is running at the correct 683 // priority 684 task.syncThreadPriority(); 685 686 Bitmap b = srcImages.get(i); 687 Bitmap outline = Bitmap.createBitmap(b.getWidth(), b.getHeight(), 688 Bitmap.Config.ARGB_8888); 689 690 c.setBitmap(outline); 691 c.save(); 692 c.drawBitmap(b, 0, 0, null); 693 c.restore(); 694 695 images.add(outline); 696 } 697 } 698 }, 699 new AsyncTaskCallback() { 700 @Override 701 public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) { 702 mRunningTasks.remove(task); 703 if (task.page > getPageCount()) return; 704 if (task.pageContentType != mContentType) return; 705 onHolographicPageItemsLoaded(data); 706 } 707 }); 708 709 // Ensure that the outline task always runs in the background, serially 710 AppsCustomizeAsyncTask t = 711 new AppsCustomizeAsyncTask(page, mContentType); 712 t.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); 713 t.executeOnExecutor(AsyncTask.SERIAL_EXECUTOR, pageData); 714 mRunningTasks.add(t); 715 } 716 717 /* 718 * Widgets PagedView implementation 719 */ 720 private void setupPage(PagedViewGridLayout layout) { 721 layout.setPadding(mPageLayoutPaddingLeft, mPageLayoutPaddingTop, 722 mPageLayoutPaddingRight, mPageLayoutPaddingBottom); 723 724 // Note: We force a measure here to get around the fact that when we do layout calculations 725 // immediately after syncing, we don't have a proper width. That said, we already know the 726 // expected page width, so we can actually optimize by hiding all the TextView-based 727 // children that are expensive to measure, and let that happen naturally later. 728 setVisibilityOnChildren(layout, View.GONE); 729 int widthSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.AT_MOST); 730 int heightSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.AT_MOST); 731 layout.setMinimumWidth(getPageContentWidth()); 732 layout.measure(widthSpec, heightSpec); 733 setVisibilityOnChildren(layout, View.VISIBLE); 734 } 735 private synchronized void renderDrawableToBitmap(Drawable d, Bitmap bitmap, int x, int y, int w, int h, 736 float scaleX, float scaleY) { 737 if (bitmap != null) { 738 Canvas c = new Canvas(bitmap); 739 c.scale(scaleX, scaleY); 740 Rect oldBounds = d.copyBounds(); 741 d.setBounds(x, y, x + w, y + h); 742 d.draw(c); 743 d.setBounds(oldBounds); // Restore the bounds 744 } 745 } 746 private Bitmap getShortcutPreview(ResolveInfo info, int cellWidth, int cellHeight) { 747 // Render the icon 748 Bitmap preview = Bitmap.createBitmap(cellWidth, mAppIconSize, Config.ARGB_8888); 749 Drawable icon = mIconCache.getFullResIcon(info, mPackageManager); 750 renderDrawableToBitmap(icon, preview, 0, 0, mAppIconSize, mAppIconSize, 1f, 1f); 751 return preview; 752 } 753 private Bitmap getWidgetPreview(AppWidgetProviderInfo info, 754 int cellHSpan, int cellVSpan, int cellWidth, int cellHeight) { 755 756 // Calculate the size of the drawable 757 cellHSpan = Math.max(mMinWidgetSpan, Math.min(mMaxWidgetSpan, cellHSpan)); 758 cellVSpan = Math.max(mMinWidgetSpan, Math.min(mMaxWidgetSpan, cellVSpan)); 759 int expectedWidth = mWidgetSpacingLayout.estimateCellWidth(cellHSpan); 760 int expectedHeight = mWidgetSpacingLayout.estimateCellHeight(cellVSpan); 761 762 // Scale down the bitmap to fit the space 763 float widgetPreviewScale = (float) cellWidth / expectedWidth; 764 expectedWidth = (int) (widgetPreviewScale * expectedWidth); 765 expectedHeight = (int) (widgetPreviewScale * expectedHeight); 766 767 // Load the preview image if possible 768 String packageName = info.provider.getPackageName(); 769 Drawable drawable = null; 770 Bitmap preview = null; 771 if (info.previewImage != 0) { 772 drawable = mPackageManager.getDrawable(packageName, info.previewImage, null); 773 if (drawable == null) { 774 Log.w(LOG_TAG, "Can't load icon drawable 0x" + Integer.toHexString(info.icon) 775 + " for provider: " + info.provider); 776 } else { 777 // Scale down the preview to the dimensions we want 778 int imageWidth = drawable.getIntrinsicWidth(); 779 int imageHeight = drawable.getIntrinsicHeight(); 780 float aspect = (float) imageWidth / imageHeight; 781 int newWidth = imageWidth; 782 int newHeight = imageHeight; 783 if (aspect > 1f) { 784 newWidth = expectedWidth; 785 newHeight = (int) (imageHeight * ((float) expectedWidth / imageWidth)); 786 } else { 787 newHeight = expectedHeight; 788 newWidth = (int) (imageWidth * ((float) expectedHeight / imageHeight)); 789 } 790 791 preview = Bitmap.createBitmap(newWidth, newHeight, Config.ARGB_8888); 792 renderDrawableToBitmap(drawable, preview, 0, 0, newWidth, newHeight, 1f, 1f); 793 } 794 } 795 796 // Generate a preview image if we couldn't load one 797 if (drawable == null) { 798 Resources resources = mLauncher.getResources(); 799 800 // Specify the dimensions of the bitmap 801 if (info.minWidth >= info.minHeight) { 802 expectedWidth = cellWidth; 803 expectedHeight = mWidgetPreviewIconPaddedDimension; 804 } else { 805 // Note that in vertical widgets, we might not have enough space due to the text 806 // label, so be conservative and use the width as a height bound 807 expectedWidth = mWidgetPreviewIconPaddedDimension; 808 expectedHeight = cellWidth; 809 } 810 811 preview = Bitmap.createBitmap(expectedWidth, expectedHeight, Config.ARGB_8888); 812 renderDrawableToBitmap(mDefaultWidgetBackground, preview, 0, 0, expectedWidth, 813 expectedHeight, 1f,1f); 814 815 // Draw the icon in the top left corner 816 try { 817 Drawable icon = null; 818 if (info.icon > 0) icon = mPackageManager.getDrawable(packageName, info.icon, null); 819 if (icon == null) icon = resources.getDrawable(R.drawable.ic_launcher_application); 820 821 int offset = (int) (mAppIconSize * sWidgetPreviewIconPaddingPercentage); 822 renderDrawableToBitmap(icon, preview, offset, offset, 823 mAppIconSize, mAppIconSize, 1f, 1f); 824 } catch (Resources.NotFoundException e) {} 825 } 826 return preview; 827 } 828 public void syncWidgetPages() { 829 // Ensure that we have the right number of pages 830 Context context = getContext(); 831 int[] countX = { mWidgetCountX, mShortcutCountX }; 832 int[] countY = { mWidgetCountY, mShortcutCountY }; 833 Object[] collection = { mWidgets, mShortcuts }; 834 for (int i = 0; i < 2; ++i) { 835 ArrayList<Object> list = (ArrayList<Object>) collection[i]; 836 int numItemsPerPage = countX[i] * countY[i]; 837 int numItemPages = (int) Math.ceil(list.size() / (float) numItemsPerPage); 838 for (int j = 0; j < numItemPages; ++j) { 839 PagedViewGridLayout layout = new PagedViewGridLayout(context, countX[i], 840 countY[i]); 841 setupPage(layout); 842 addView(layout); 843 } 844 } 845 } 846 public void syncWidgetPageItems(int page) { 847 int[] countX = { mWidgetCountX, mShortcutCountX }; 848 int[] countY = { mWidgetCountY, mShortcutCountY }; 849 int[] widthGap = { mWidgetWidthGap, mWidgetWidthGap }; 850 int[] heightGap = { mWidgetHeightGap, mWidgetHeightGap }; 851 int[] numItemsPerPage = { mWidgetCountX * mWidgetCountY, 852 mShortcutCountX * mShortcutCountY }; 853 Object[] collection = { mWidgets, mShortcuts }; 854 int contentWidth = mWidgetSpacingLayout.getContentWidth(); 855 int contentHeight = mWidgetSpacingLayout.getContentHeight(); 856 int numWidgetPages = (int) Math.ceil(mWidgets.size() / (float) numItemsPerPage[0]); 857 int[] offsets = { page * numItemsPerPage[0], (page - numWidgetPages) * numItemsPerPage[1] }; 858 int index = (page < numWidgetPages ? 0 : 1); 859 860 // Calculate the dimensions of each cell we are giving to each widget 861 ArrayList<Object> list = (ArrayList<Object>) collection[index]; 862 ArrayList<Object> items = new ArrayList<Object>(); 863 int cellWidth = ((contentWidth - mPageLayoutPaddingLeft - mPageLayoutPaddingRight 864 - ((countX[index] - 1) * widthGap[index])) / countX[index]); 865 int cellHeight = ((contentHeight - mPageLayoutPaddingTop - mPageLayoutPaddingBottom 866 - ((countY[index] - 1) * heightGap[index])) / countY[index]); 867 868 int offset = offsets[index]; 869 for (int i = offset; i < Math.min(offset + numItemsPerPage[index], list.size()); ++i) { 870 items.add(list.get(i)); 871 } 872 873 prepareLoadWidgetPreviewsTask(page, items, cellWidth, cellHeight, countX[index]); 874 } 875 private void onSyncWidgetPageItems(AsyncTaskPageData data) { 876 int page = data.page; 877 PagedViewGridLayout layout = (PagedViewGridLayout) getChildAt(page); 878 layout.removeAllViews(); 879 880 ArrayList<Object> items = data.items; 881 int count = items.size(); 882 int cellWidth = data.cellWidth; 883 int cellHeight = data.cellHeight; 884 int cellCountX = data.cellCountX; 885 for (int i = 0; i < count; ++i) { 886 Object rawInfo = items.get(i); 887 PendingAddItemInfo createItemInfo = null; 888 PagedViewWidget widget = (PagedViewWidget) mLayoutInflater.inflate( 889 R.layout.apps_customize_widget, layout, false); 890 if (rawInfo instanceof AppWidgetProviderInfo) { 891 // Fill in the widget information 892 AppWidgetProviderInfo info = (AppWidgetProviderInfo) rawInfo; 893 createItemInfo = new PendingAddWidgetInfo(info, null, null); 894 int[] cellSpans = CellLayout.rectToCell(getResources(), 895 info.minWidth, info.minHeight, null); 896 FastBitmapDrawable preview = new FastBitmapDrawable(data.generatedImages.get(i)); 897 widget.applyFromAppWidgetProviderInfo(info, preview, -1, cellSpans, 898 mHolographicOutlineHelper); 899 widget.setTag(createItemInfo); 900 } else if (rawInfo instanceof ResolveInfo) { 901 // Fill in the shortcuts information 902 ResolveInfo info = (ResolveInfo) rawInfo; 903 createItemInfo = new PendingAddItemInfo(); 904 createItemInfo.itemType = LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT; 905 createItemInfo.componentName = new ComponentName(info.activityInfo.packageName, 906 info.activityInfo.name); 907 FastBitmapDrawable preview = new FastBitmapDrawable(data.generatedImages.get(i)); 908 widget.applyFromResolveInfo(mPackageManager, info, preview, 909 mHolographicOutlineHelper); 910 widget.setTag(createItemInfo); 911 } 912 widget.setOnClickListener(this); 913 widget.setOnLongClickListener(this); 914 widget.setOnTouchListener(this); 915 916 // Layout each widget 917 int ix = i % cellCountX; 918 int iy = i / cellCountX; 919 GridLayout.LayoutParams lp = new GridLayout.LayoutParams( 920 new GridLayout.Group(iy, 1, GridLayout.LEFT), 921 new GridLayout.Group(ix, 1, GridLayout.TOP)); 922 lp.width = cellWidth; 923 lp.height = cellHeight; 924 if (ix > 0) lp.leftMargin = mWidgetWidthGap; 925 if (iy > 0) lp.topMargin = mWidgetHeightGap; 926 layout.addView(widget, lp); 927 } 928 929 invalidate(); 930 forceUpdateAdjacentPagesAlpha(); 931 prepareGenerateHoloOutlinesTask(data.page, data.items, data.generatedImages); 932 } 933 private void onHolographicPageItemsLoaded(AsyncTaskPageData data) { 934 // Invalidate early to short-circuit children invalidates 935 invalidate(); 936 937 int page = data.page; 938 ViewGroup layout = (ViewGroup) getChildAt(page); 939 if (layout instanceof PagedViewCellLayout) { 940 PagedViewCellLayout cl = (PagedViewCellLayout) layout; 941 int count = cl.getPageChildCount(); 942 for (int i = 0; i < count; ++i) { 943 PagedViewIcon icon = (PagedViewIcon) cl.getChildOnPageAt(i); 944 icon.setHolographicOutline(data.generatedImages.get(i)); 945 } 946 } else { 947 int count = layout.getChildCount(); 948 for (int i = 0; i < count; ++i) { 949 View v = layout.getChildAt(i); 950 ((PagedViewWidget) v).setHolographicOutline(data.generatedImages.get(i)); 951 } 952 } 953 } 954 955 @Override 956 public void syncPages() { 957 removeAllViews(); 958 switch (mContentType) { 959 case Applications: 960 syncAppsPages(); 961 break; 962 case Widgets: 963 syncWidgetPages(); 964 break; 965 } 966 } 967 @Override 968 public void syncPageItems(int page) { 969 switch (mContentType) { 970 case Applications: 971 syncAppsPageItems(page); 972 break; 973 case Widgets: 974 syncWidgetPageItems(page); 975 break; 976 } 977 } 978 979 /** 980 * Used by the parent to get the content width to set the tab bar to 981 * @return 982 */ 983 public int getPageContentWidth() { 984 return mContentWidth; 985 } 986 987 @Override 988 protected void onPageBeginMoving() { 989 /* TO BE ENABLED LATER 990 setChildrenDrawnWithCacheEnabled(true); 991 for (int i = 0; i < getChildCount(); ++i) { 992 View v = getChildAt(i); 993 if (v instanceof PagedViewCellLayout) { 994 ((PagedViewCellLayout) v).setChildrenDrawingCacheEnabled(true); 995 } 996 } 997 */ 998 super.onPageBeginMoving(); 999 } 1000 1001 @Override 1002 protected void onPageEndMoving() { 1003 /* TO BE ENABLED LATER 1004 for (int i = 0; i < getChildCount(); ++i) { 1005 View v = getChildAt(i); 1006 if (v instanceof PagedViewCellLayout) { 1007 ((PagedViewCellLayout) v).setChildrenDrawingCacheEnabled(false); 1008 } 1009 } 1010 setChildrenDrawnWithCacheEnabled(false); 1011 */ 1012 super.onPageEndMoving(); 1013 } 1014 1015 /* 1016 * AllAppsView implementation 1017 */ 1018 @Override 1019 public void setup(Launcher launcher, DragController dragController) { 1020 mLauncher = launcher; 1021 mDragController = dragController; 1022 } 1023 @Override 1024 public void zoom(float zoom, boolean animate) { 1025 // TODO-APPS_CUSTOMIZE: Call back to mLauncher.zoomed() 1026 } 1027 @Override 1028 public boolean isVisible() { 1029 return (getVisibility() == VISIBLE); 1030 } 1031 @Override 1032 public boolean isAnimating() { 1033 return false; 1034 } 1035 @Override 1036 public void setApps(ArrayList<ApplicationInfo> list) { 1037 mApps = list; 1038 Collections.sort(mApps, LauncherModel.APP_NAME_COMPARATOR); 1039 1040 // The next layout pass will trigger data-ready if both widgets and apps are set, so request 1041 // a layout to do this test and invalidate the page data when ready. 1042 if (testDataReady()) requestLayout(); 1043 } 1044 private void addAppsWithoutInvalidate(ArrayList<ApplicationInfo> list) { 1045 // We add it in place, in alphabetical order 1046 int count = list.size(); 1047 for (int i = 0; i < count; ++i) { 1048 ApplicationInfo info = list.get(i); 1049 int index = Collections.binarySearch(mApps, info, LauncherModel.APP_NAME_COMPARATOR); 1050 if (index < 0) { 1051 mApps.add(-(index + 1), info); 1052 } 1053 } 1054 } 1055 @Override 1056 public void addApps(ArrayList<ApplicationInfo> list) { 1057 addAppsWithoutInvalidate(list); 1058 invalidatePageData(); 1059 } 1060 private int findAppByComponent(List<ApplicationInfo> list, ApplicationInfo item) { 1061 ComponentName removeComponent = item.intent.getComponent(); 1062 int length = list.size(); 1063 for (int i = 0; i < length; ++i) { 1064 ApplicationInfo info = list.get(i); 1065 if (info.intent.getComponent().equals(removeComponent)) { 1066 return i; 1067 } 1068 } 1069 return -1; 1070 } 1071 private void removeAppsWithoutInvalidate(ArrayList<ApplicationInfo> list) { 1072 // loop through all the apps and remove apps that have the same component 1073 int length = list.size(); 1074 for (int i = 0; i < length; ++i) { 1075 ApplicationInfo info = list.get(i); 1076 int removeIndex = findAppByComponent(mApps, info); 1077 if (removeIndex > -1) { 1078 mApps.remove(removeIndex); 1079 } 1080 } 1081 } 1082 @Override 1083 public void removeApps(ArrayList<ApplicationInfo> list) { 1084 removeAppsWithoutInvalidate(list); 1085 invalidatePageData(); 1086 } 1087 @Override 1088 public void updateApps(ArrayList<ApplicationInfo> list) { 1089 // We remove and re-add the updated applications list because it's properties may have 1090 // changed (ie. the title), and this will ensure that the items will be in their proper 1091 // place in the list. 1092 removeAppsWithoutInvalidate(list); 1093 addAppsWithoutInvalidate(list); 1094 invalidatePageData(); 1095 } 1096 @Override 1097 public void reset() { 1098 if (mContentType != ContentType.Applications) { 1099 // Reset to the first page of the Apps pane 1100 AppsCustomizeTabHost tabs = (AppsCustomizeTabHost) 1101 mLauncher.findViewById(R.id.apps_customize_pane); 1102 tabs.setCurrentTabByTag(tabs.getTabTagForContentType(ContentType.Applications)); 1103 } else { 1104 setCurrentPage(0); 1105 invalidatePageData(); 1106 } 1107 } 1108 @Override 1109 public void dumpState() { 1110 // TODO: Dump information related to current list of Applications, Widgets, etc. 1111 ApplicationInfo.dumpApplicationInfoList(LOG_TAG, "mApps", mApps); 1112 dumpAppWidgetProviderInfoList(LOG_TAG, "mWidgets", mWidgets); 1113 dumpAppWidgetProviderInfoList(LOG_TAG, "mShortcuts", mShortcuts); 1114 } 1115 private void dumpAppWidgetProviderInfoList(String tag, String label, 1116 ArrayList<Object> list) { 1117 Log.d(tag, label + " size=" + list.size()); 1118 for (Object i: list) { 1119 if (i instanceof AppWidgetProviderInfo) { 1120 AppWidgetProviderInfo info = (AppWidgetProviderInfo) i; 1121 Log.d(tag, " label=\"" + info.label + "\" previewImage=" + info.previewImage 1122 + " resizeMode=" + info.resizeMode + " configure=" + info.configure 1123 + " initialLayout=" + info.initialLayout 1124 + " minWidth=" + info.minWidth + " minHeight=" + info.minHeight); 1125 } else if (i instanceof ResolveInfo) { 1126 ResolveInfo info = (ResolveInfo) i; 1127 Log.d(tag, " label=\"" + info.loadLabel(mPackageManager) + "\" icon=" 1128 + info.icon); 1129 } 1130 } 1131 } 1132 @Override 1133 public void surrender() { 1134 // TODO: If we are in the middle of any process (ie. for holographic outlines, etc) we 1135 // should stop this now. 1136 } 1137 1138 @Override 1139 protected int getPageWidthForScrollingIndicator() { 1140 return getPageContentWidth(); 1141 } 1142 1143 /* 1144 * We load an extra page on each side to prevent flashes from scrolling and loading of the 1145 * widget previews in the background with the AsyncTasks. 1146 */ 1147 protected int getAssociatedLowerPageBound(int page) { 1148 return Math.max(0, page - 2); 1149 } 1150 protected int getAssociatedUpperPageBound(int page) { 1151 final int count = getChildCount(); 1152 return Math.min(page + 2, count - 1); 1153 } 1154} 1155