AppsCustomizePagedView.java revision 6a3fd3f042c8bfa7d83e29c1eeadff21323ab089
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.Gravity; 43import android.view.LayoutInflater; 44import android.view.MotionEvent; 45import android.view.View; 46import android.view.ViewGroup; 47import android.view.animation.AccelerateInterpolator; 48import android.widget.GridLayout; 49import android.widget.ImageView; 50import android.widget.Toast; 51 52import com.android.launcher.R; 53import com.android.launcher2.DropTarget.DragObject; 54 55import java.util.ArrayList; 56import java.util.Collections; 57import java.util.Iterator; 58import java.util.List; 59 60/** 61 * A simple callback interface which also provides the results of the task. 62 */ 63interface AsyncTaskCallback { 64 void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data); 65} 66 67/** 68 * The data needed to perform either of the custom AsyncTasks. 69 */ 70class AsyncTaskPageData { 71 enum Type { 72 LoadWidgetPreviewData, 73 LoadHolographicIconsData 74 } 75 76 AsyncTaskPageData(int p, ArrayList<Object> l, ArrayList<Bitmap> si, AsyncTaskCallback bgR, 77 AsyncTaskCallback postR) { 78 page = p; 79 items = l; 80 sourceImages = si; 81 generatedImages = new ArrayList<Bitmap>(); 82 cellWidth = cellHeight = -1; 83 doInBackgroundCallback = bgR; 84 postExecuteCallback = postR; 85 } 86 AsyncTaskPageData(int p, ArrayList<Object> l, int cw, int ch, int ccx, AsyncTaskCallback bgR, 87 AsyncTaskCallback postR) { 88 page = p; 89 items = l; 90 generatedImages = new ArrayList<Bitmap>(); 91 cellWidth = cw; 92 cellHeight = ch; 93 cellCountX = ccx; 94 doInBackgroundCallback = bgR; 95 postExecuteCallback = postR; 96 } 97 int page; 98 ArrayList<Object> items; 99 ArrayList<Bitmap> sourceImages; 100 ArrayList<Bitmap> generatedImages; 101 int cellWidth; 102 int cellHeight; 103 int cellCountX; 104 AsyncTaskCallback doInBackgroundCallback; 105 AsyncTaskCallback postExecuteCallback; 106} 107 108/** 109 * A generic template for an async task used in AppsCustomize. 110 */ 111class AppsCustomizeAsyncTask extends AsyncTask<AsyncTaskPageData, Void, AsyncTaskPageData> { 112 AppsCustomizeAsyncTask(int p, AppsCustomizePagedView.ContentType t, AsyncTaskPageData.Type ty) { 113 page = p; 114 pageContentType = t; 115 threadPriority = Process.THREAD_PRIORITY_DEFAULT; 116 dataType = ty; 117 } 118 @Override 119 protected AsyncTaskPageData doInBackground(AsyncTaskPageData... params) { 120 if (params.length != 1) return null; 121 // Load each of the widget previews in the background 122 params[0].doInBackgroundCallback.run(this, params[0]); 123 return params[0]; 124 } 125 @Override 126 protected void onPostExecute(AsyncTaskPageData result) { 127 // All the widget previews are loaded, so we can just callback to inflate the page 128 result.postExecuteCallback.run(this, result); 129 } 130 131 void setThreadPriority(int p) { 132 threadPriority = p; 133 } 134 void syncThreadPriority() { 135 Process.setThreadPriority(threadPriority); 136 } 137 138 // The page that this async task is associated with 139 AsyncTaskPageData.Type dataType; 140 int page; 141 AppsCustomizePagedView.ContentType pageContentType; 142 int threadPriority; 143} 144 145/** 146 * The Apps/Customize page that displays all the applications, widgets, and shortcuts. 147 */ 148public class AppsCustomizePagedView extends PagedViewWithDraggableItems implements 149 AllAppsView, View.OnClickListener, DragSource { 150 static final String LOG_TAG = "AppsCustomizePagedView"; 151 152 /** 153 * The different content types that this paged view can show. 154 */ 155 public enum ContentType { 156 Applications, 157 Widgets 158 } 159 160 // Refs 161 private Launcher mLauncher; 162 private DragController mDragController; 163 private final LayoutInflater mLayoutInflater; 164 private final PackageManager mPackageManager; 165 166 // Content 167 private ContentType mContentType; 168 private ArrayList<ApplicationInfo> mApps; 169 private ArrayList<Object> mWidgets; 170 171 // Caching 172 private Canvas mCanvas; 173 private Drawable mDefaultWidgetBackground; 174 private IconCache mIconCache; 175 176 // Dimens 177 private int mContentWidth; 178 private int mAppIconSize; 179 private int mMaxWidgetSpan, mMinWidgetSpan; 180 private int mWidgetCountX, mWidgetCountY; 181 private int mWidgetWidthGap, mWidgetHeightGap; 182 private final int mWidgetPreviewIconPaddedDimension; 183 private final float sWidgetPreviewIconPaddingPercentage = 0.25f; 184 private PagedViewCellLayout mWidgetSpacingLayout; 185 186 // Previews & outlines 187 ArrayList<AppsCustomizeAsyncTask> mRunningTasks; 188 private HolographicOutlineHelper mHolographicOutlineHelper; 189 190 public AppsCustomizePagedView(Context context, AttributeSet attrs) { 191 super(context, attrs); 192 mLayoutInflater = LayoutInflater.from(context); 193 mPackageManager = context.getPackageManager(); 194 mContentType = ContentType.Applications; 195 mApps = new ArrayList<ApplicationInfo>(); 196 mWidgets = new ArrayList<Object>(); 197 mIconCache = ((LauncherApplication) context.getApplicationContext()).getIconCache(); 198 mHolographicOutlineHelper = new HolographicOutlineHelper(); 199 mCanvas = new Canvas(); 200 mRunningTasks = new ArrayList<AppsCustomizeAsyncTask>(); 201 202 // Save the default widget preview background 203 Resources resources = context.getResources(); 204 mDefaultWidgetBackground = resources.getDrawable(R.drawable.default_widget_preview_holo); 205 mAppIconSize = getResources().getDimensionPixelSize(R.dimen.app_icon_size); 206 207 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PagedView, 0, 0); 208 // TODO-APPS_CUSTOMIZE: remove these unnecessary attrs after 209 mCellCountX = a.getInt(R.styleable.PagedView_cellCountX, 6); 210 mCellCountY = a.getInt(R.styleable.PagedView_cellCountY, 4); 211 a.recycle(); 212 a = context.obtainStyledAttributes(attrs, R.styleable.AppsCustomizePagedView, 0, 0); 213 mWidgetWidthGap = 214 a.getDimensionPixelSize(R.styleable.AppsCustomizePagedView_widgetCellWidthGap, 0); 215 mWidgetHeightGap = 216 a.getDimensionPixelSize(R.styleable.AppsCustomizePagedView_widgetCellHeightGap, 0); 217 mWidgetCountX = a.getInt(R.styleable.AppsCustomizePagedView_widgetCountX, 2); 218 mWidgetCountY = a.getInt(R.styleable.AppsCustomizePagedView_widgetCountY, 2); 219 a.recycle(); 220 mWidgetSpacingLayout = new PagedViewCellLayout(getContext()); 221 222 // The max widget span is the length N, such that NxN is the largest bounds that the widget 223 // preview can be before applying the widget scaling 224 mMinWidgetSpan = 1; 225 mMaxWidgetSpan = 3; 226 227 // The padding on the non-matched dimension for the default widget preview icons 228 // (top + bottom) 229 mWidgetPreviewIconPaddedDimension = 230 (int) (mAppIconSize * (1 + (2 * sWidgetPreviewIconPaddingPercentage))); 231 } 232 233 @Override 234 protected void init() { 235 super.init(); 236 mCenterPagesVertically = false; 237 238 Context context = getContext(); 239 Resources r = context.getResources(); 240 setDragSlopeThreshold(r.getInteger(R.integer.config_appsCustomizeDragSlopeThreshold)/100f); 241 } 242 243 @Override 244 protected void onWallpaperTap(MotionEvent ev) { 245 int action = ev.getAction(); 246 if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) { 247 // Dismiss AppsCustomize if we tap 248 mLauncher.showWorkspace(true); 249 } 250 } 251 252 /** 253 * This differs from isDataReady as this is the test done if isDataReady is not set. 254 */ 255 private boolean testDataReady() { 256 // We only do this test once, and we default to the Applications page, so we only really 257 // have to wait for there to be apps. 258 return !mApps.isEmpty(); 259 } 260 261 protected void onDataReady(int width, int height) { 262 // Note that we transpose the counts in portrait so that we get a similar layout 263 boolean isLandscape = getResources().getConfiguration().orientation == 264 Configuration.ORIENTATION_LANDSCAPE; 265 int maxCellCountX = Integer.MAX_VALUE; 266 int maxCellCountY = Integer.MAX_VALUE; 267 if (LauncherApplication.isScreenLarge()) { 268 maxCellCountX = (isLandscape ? LauncherModel.getCellCountX() : 269 LauncherModel.getCellCountY()); 270 maxCellCountY = (isLandscape ? LauncherModel.getCellCountY() : 271 LauncherModel.getCellCountX()); 272 } 273 274 // Now that the data is ready, we can calculate the content width, the number of cells to 275 // use for each page 276 mWidgetSpacingLayout.setGap(mPageLayoutWidthGap, mPageLayoutHeightGap); 277 mWidgetSpacingLayout.setPadding(mPageLayoutPaddingLeft, mPageLayoutPaddingTop, 278 mPageLayoutPaddingRight, mPageLayoutPaddingBottom); 279 mWidgetSpacingLayout.calculateCellCount(width, height, maxCellCountX, maxCellCountY); 280 mCellCountX = mWidgetSpacingLayout.getCellCountX(); 281 mCellCountY = mWidgetSpacingLayout.getCellCountY(); 282 mWidgetCountX = Math.max(1, (int) Math.round(mCellCountX / 2f)); 283 mWidgetCountY = Math.max(1, (int) Math.round(mCellCountY / 3f)); 284 285 // Force a measure to update recalculate the gaps 286 int widthSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.AT_MOST); 287 int heightSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.AT_MOST); 288 mWidgetSpacingLayout.measure(widthSpec, heightSpec); 289 mContentWidth = mWidgetSpacingLayout.getContentWidth(); 290 invalidatePageData(); 291 } 292 293 @Override 294 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 295 int width = MeasureSpec.getSize(widthMeasureSpec); 296 int height = MeasureSpec.getSize(heightMeasureSpec); 297 if (!isDataReady()) { 298 if (testDataReady()) { 299 setDataIsReady(); 300 setMeasuredDimension(width, height); 301 onDataReady(width, height); 302 } 303 } 304 305 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 306 } 307 308 /** Removes and returns the ResolveInfo with the specified ComponentName */ 309 private ResolveInfo removeResolveInfoWithComponentName(List<ResolveInfo> list, 310 ComponentName cn) { 311 Iterator<ResolveInfo> iter = list.iterator(); 312 while (iter.hasNext()) { 313 ResolveInfo rinfo = iter.next(); 314 ActivityInfo info = rinfo.activityInfo; 315 ComponentName c = new ComponentName(info.packageName, info.name); 316 if (c.equals(cn)) { 317 iter.remove(); 318 return rinfo; 319 } 320 } 321 return null; 322 } 323 324 public void onPackagesUpdated() { 325 // Get the list of widgets and shortcuts 326 boolean wasEmpty = mWidgets.isEmpty(); 327 mWidgets.clear(); 328 List<AppWidgetProviderInfo> widgets = 329 AppWidgetManager.getInstance(mLauncher).getInstalledProviders(); 330 Intent shortcutsIntent = new Intent(Intent.ACTION_CREATE_SHORTCUT); 331 List<ResolveInfo> shortcuts = mPackageManager.queryIntentActivities(shortcutsIntent, 0); 332 mWidgets.addAll(widgets); 333 mWidgets.addAll(shortcuts); 334 Collections.sort(mWidgets, 335 new LauncherModel.WidgetAndShortcutNameComparator(mPackageManager)); 336 337 if (wasEmpty) { 338 // The next layout pass will trigger data-ready if both widgets and apps are set, so request 339 // a layout to do this test and invalidate the page data when ready. 340 if (testDataReady()) requestLayout(); 341 } else { 342 invalidatePageData(); 343 } 344 } 345 346 @Override 347 public void onClick(View v) { 348 // When we have exited all apps or are in transition, disregard clicks 349 if (!mLauncher.isAllAppsCustomizeOpen() || 350 mLauncher.getWorkspace().isSwitchingState()) return; 351 352 if (v instanceof PagedViewIcon) { 353 // Animate some feedback to the click 354 final ApplicationInfo appInfo = (ApplicationInfo) v.getTag(); 355 animateClickFeedback(v, new Runnable() { 356 @Override 357 public void run() { 358 mLauncher.startActivitySafely(appInfo.intent, appInfo); 359 } 360 }); 361 } else if (v instanceof PagedViewWidget) { 362 // Let the user know that they have to long press to add a widget 363 Toast.makeText(getContext(), R.string.long_press_widget_to_add, 364 Toast.LENGTH_SHORT).show(); 365 366 // Create a little animation to show that the widget can move 367 float offsetY = getResources().getDimensionPixelSize(R.dimen.dragViewOffsetY); 368 final ImageView p = (ImageView) v.findViewById(R.id.widget_preview); 369 AnimatorSet bounce = new AnimatorSet(); 370 ValueAnimator tyuAnim = ObjectAnimator.ofFloat(p, "translationY", offsetY); 371 tyuAnim.setDuration(125); 372 ValueAnimator tydAnim = ObjectAnimator.ofFloat(p, "translationY", 0f); 373 tydAnim.setDuration(100); 374 bounce.play(tyuAnim).before(tydAnim); 375 bounce.setInterpolator(new AccelerateInterpolator()); 376 bounce.start(); 377 } 378 } 379 380 /* 381 * PagedViewWithDraggableItems implementation 382 */ 383 @Override 384 protected void determineDraggingStart(android.view.MotionEvent ev) { 385 // Disable dragging by pulling an app down for now. 386 } 387 388 private void beginDraggingApplication(View v) { 389 mLauncher.getWorkspace().onDragStartedWithItem(v); 390 mLauncher.getWorkspace().beginDragShared(v, this); 391 } 392 393 private void beginDraggingWidget(View v) { 394 // Get the widget preview as the drag representation 395 ImageView image = (ImageView) v.findViewById(R.id.widget_preview); 396 PendingAddItemInfo createItemInfo = (PendingAddItemInfo) v.getTag(); 397 398 // Compose the drag image 399 Bitmap b; 400 Drawable preview = image.getDrawable(); 401 int w = preview.getIntrinsicWidth(); 402 int h = preview.getIntrinsicHeight(); 403 if (createItemInfo instanceof PendingAddWidgetInfo) { 404 PendingAddWidgetInfo createWidgetInfo = (PendingAddWidgetInfo) createItemInfo; 405 int[] spanXY = CellLayout.rectToCell(getResources(), 406 createWidgetInfo.minWidth, createWidgetInfo.minHeight, null); 407 createItemInfo.spanX = spanXY[0]; 408 createItemInfo.spanY = spanXY[1]; 409 410 b = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); 411 renderDrawableToBitmap(preview, b, 0, 0, w, h, 1, 1); 412 } else { 413 // Workaround for the fact that we don't keep the original ResolveInfo associated with 414 // the shortcut around. To get the icon, we just render the preview image (which has 415 // the shortcut icon) to a new drag bitmap that clips the non-icon space. 416 b = Bitmap.createBitmap(mWidgetPreviewIconPaddedDimension, 417 mWidgetPreviewIconPaddedDimension, Bitmap.Config.ARGB_8888); 418 mCanvas.setBitmap(b); 419 mCanvas.save(); 420 preview.draw(mCanvas); 421 mCanvas.restore(); 422 createItemInfo.spanX = createItemInfo.spanY = 1; 423 } 424 425 // Start the drag 426 mLauncher.lockScreenOrientation(); 427 mLauncher.getWorkspace().onDragStartedWithItemSpans(createItemInfo.spanX, 428 createItemInfo.spanY, b); 429 mDragController.startDrag(image, b, this, createItemInfo, 430 DragController.DRAG_ACTION_COPY, null); 431 b.recycle(); 432 } 433 @Override 434 protected boolean beginDragging(View v) { 435 if (!super.beginDragging(v)) return false; 436 437 // Go into spring loaded mode (must happen before we startDrag()) 438 int currentPageIndex = mLauncher.getWorkspace().getCurrentPage(); 439 CellLayout currentPage = (CellLayout) mLauncher.getWorkspace().getChildAt(currentPageIndex); 440 mLauncher.enterSpringLoadedDragMode(currentPage); 441 442 if (v instanceof PagedViewIcon) { 443 beginDraggingApplication(v); 444 } else if (v instanceof PagedViewWidget) { 445 beginDraggingWidget(v); 446 } 447 return true; 448 } 449 private void endDragging(View target, boolean success) { 450 mLauncher.getWorkspace().onDragStopped(success); 451 if (!success || (target != mLauncher.getWorkspace() && 452 !(target instanceof DeleteDropTarget))) { 453 // Exit spring loaded mode if we have not successfully dropped or have not handled the 454 // drop in Workspace 455 mLauncher.exitSpringLoadedDragMode(); 456 } 457 mLauncher.unlockScreenOrientation(); 458 459 } 460 461 @Override 462 public void onDropCompleted(View target, DragObject d, boolean success) { 463 endDragging(target, success); 464 465 // Display an error message if the drag failed due to there not being enough space on the 466 // target layout we were dropping on. 467 if (!success) { 468 boolean showOutOfSpaceMessage = false; 469 if (target instanceof Workspace) { 470 int currentScreen = mLauncher.getCurrentWorkspaceScreen(); 471 Workspace workspace = (Workspace) target; 472 CellLayout layout = (CellLayout) workspace.getChildAt(currentScreen); 473 ItemInfo itemInfo = (ItemInfo) d.dragInfo; 474 if (layout != null) { 475 layout.calculateSpans(itemInfo); 476 showOutOfSpaceMessage = 477 !layout.findCellForSpan(null, itemInfo.spanX, itemInfo.spanY); 478 } 479 } 480 // TODO-APPS_CUSTOMIZE: We need to handle this for folders as well later. 481 if (showOutOfSpaceMessage) { 482 mLauncher.showOutOfSpaceMessage(); 483 } 484 } 485 } 486 487 public void setContentType(ContentType type) { 488 mContentType = type; 489 invalidatePageData(0); 490 } 491 492 public boolean isContentType(ContentType type) { 493 return (mContentType == type); 494 } 495 496 public void setCurrentPageToWidgets() { 497 invalidatePageData(0); 498 } 499 500 /* 501 * Apps PagedView implementation 502 */ 503 private void setVisibilityOnChildren(ViewGroup layout, int visibility) { 504 int childCount = layout.getChildCount(); 505 for (int i = 0; i < childCount; ++i) { 506 layout.getChildAt(i).setVisibility(visibility); 507 } 508 } 509 private void setupPage(PagedViewCellLayout layout) { 510 layout.setCellCount(mCellCountX, mCellCountY); 511 layout.setGap(mPageLayoutWidthGap, mPageLayoutHeightGap); 512 layout.setPadding(mPageLayoutPaddingLeft, mPageLayoutPaddingTop, 513 mPageLayoutPaddingRight, mPageLayoutPaddingBottom); 514 515 // Note: We force a measure here to get around the fact that when we do layout calculations 516 // immediately after syncing, we don't have a proper width. That said, we already know the 517 // expected page width, so we can actually optimize by hiding all the TextView-based 518 // children that are expensive to measure, and let that happen naturally later. 519 setVisibilityOnChildren(layout, View.GONE); 520 int widthSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.AT_MOST); 521 int heightSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.AT_MOST); 522 layout.setMinimumWidth(getPageContentWidth()); 523 layout.measure(widthSpec, heightSpec); 524 setVisibilityOnChildren(layout, View.VISIBLE); 525 } 526 public void syncAppsPages() { 527 // Ensure that we have the right number of pages 528 Context context = getContext(); 529 int numPages = (int) Math.ceil((float) mApps.size() / (mCellCountX * mCellCountY)); 530 for (int i = 0; i < numPages; ++i) { 531 PagedViewCellLayout layout = new PagedViewCellLayout(context); 532 setupPage(layout); 533 addView(layout); 534 } 535 } 536 public void syncAppsPageItems(int page) { 537 // ensure that we have the right number of items on the pages 538 int numPages = getPageCount(); 539 int numCells = mCellCountX * mCellCountY; 540 int startIndex = page * numCells; 541 int endIndex = Math.min(startIndex + numCells, mApps.size()); 542 PagedViewCellLayout layout = (PagedViewCellLayout) getChildAt(page); 543 544 layout.removeAllViewsOnPage(); 545 ArrayList<Object> items = new ArrayList<Object>(); 546 ArrayList<Bitmap> images = new ArrayList<Bitmap>(); 547 for (int i = startIndex; i < endIndex; ++i) { 548 ApplicationInfo info = mApps.get(i); 549 PagedViewIcon icon = (PagedViewIcon) mLayoutInflater.inflate( 550 R.layout.apps_customize_application, layout, false); 551 icon.applyFromApplicationInfo(info, true, mHolographicOutlineHelper); 552 icon.setOnClickListener(this); 553 icon.setOnLongClickListener(this); 554 icon.setOnTouchListener(this); 555 556 int index = i - startIndex; 557 int x = index % mCellCountX; 558 int y = index / mCellCountX; 559 layout.addViewToCellLayout(icon, -1, i, new PagedViewCellLayout.LayoutParams(x,y, 1,1)); 560 561 items.add(info); 562 images.add(info.iconBitmap); 563 } 564 565 // Create the hardware layers 566 layout.allowHardwareLayerCreation(); 567 layout.createHardwareLayers(); 568 569 prepareGenerateHoloOutlinesTask(page, items, images); 570 } 571 572 /** 573 * Return the appropriate thread priority for loading for a given page (we give the current 574 * page much higher priority) 575 */ 576 private int getThreadPriorityForPage(int page) { 577 // TODO-APPS_CUSTOMIZE: detect number of cores and set thread priorities accordingly below 578 int pageDiff = Math.abs(page - mCurrentPage); 579 if (pageDiff <= 0) { 580 // return Process.THREAD_PRIORITY_DEFAULT; 581 return Process.THREAD_PRIORITY_MORE_FAVORABLE; 582 } else if (pageDiff <= 1) { 583 // return Process.THREAD_PRIORITY_BACKGROUND; 584 return Process.THREAD_PRIORITY_DEFAULT; 585 } else { 586 // return Process.THREAD_PRIORITY_LOWEST; 587 return Process.THREAD_PRIORITY_DEFAULT; 588 } 589 } 590 /** 591 * Creates and executes a new AsyncTask to load a page of widget previews. 592 */ 593 private void prepareLoadWidgetPreviewsTask(int page, ArrayList<Object> widgets, 594 int cellWidth, int cellHeight, int cellCountX) { 595 // Prune all tasks that are no longer needed 596 Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator(); 597 while (iter.hasNext()) { 598 AppsCustomizeAsyncTask task = (AppsCustomizeAsyncTask) iter.next(); 599 int taskPage = task.page; 600 if ((taskPage == page) || 601 taskPage < getAssociatedLowerPageBound(mCurrentPage) || 602 taskPage > getAssociatedUpperPageBound(mCurrentPage)) { 603 task.cancel(false); 604 iter.remove(); 605 } else { 606 task.setThreadPriority(getThreadPriorityForPage(taskPage)); 607 } 608 } 609 610 AsyncTaskPageData pageData = new AsyncTaskPageData(page, widgets, cellWidth, cellHeight, 611 cellCountX, new AsyncTaskCallback() { 612 @Override 613 public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) { 614 // Ensure that this task starts running at the correct priority 615 task.syncThreadPriority(); 616 617 // Load each of the widget/shortcut previews 618 ArrayList<Object> items = data.items; 619 ArrayList<Bitmap> images = data.generatedImages; 620 int count = items.size(); 621 int cellWidth = data.cellWidth; 622 int cellHeight = data.cellHeight; 623 for (int i = 0; i < count && !task.isCancelled(); ++i) { 624 // Before work on each item, ensure that this task is running at the correct 625 // priority 626 task.syncThreadPriority(); 627 628 Object rawInfo = items.get(i); 629 if (rawInfo instanceof AppWidgetProviderInfo) { 630 AppWidgetProviderInfo info = (AppWidgetProviderInfo) rawInfo; 631 int[] cellSpans = CellLayout.rectToCell(getResources(), 632 info.minWidth, info.minHeight, null); 633 images.add(getWidgetPreview(info, cellSpans[0],cellSpans[1], 634 cellWidth, cellHeight)); 635 } else if (rawInfo instanceof ResolveInfo) { 636 // Fill in the shortcuts information 637 ResolveInfo info = (ResolveInfo) rawInfo; 638 images.add(getShortcutPreview(info, cellWidth, cellHeight)); 639 } 640 } 641 } 642 }, 643 new AsyncTaskCallback() { 644 @Override 645 public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) { 646 mRunningTasks.remove(task); 647 if (task.isCancelled()) return; 648 if (task.page > getPageCount()) return; 649 if (task.pageContentType != mContentType) return; 650 onSyncWidgetPageItems(data); 651 } 652 }); 653 654 // Ensure that the task is appropriately prioritized and runs in parallel 655 AppsCustomizeAsyncTask t = new AppsCustomizeAsyncTask(page, mContentType, 656 AsyncTaskPageData.Type.LoadWidgetPreviewData); 657 t.setThreadPriority(getThreadPriorityForPage(page)); 658 t.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, pageData); 659 mRunningTasks.add(t); 660 } 661 /** 662 * Creates and executes a new AsyncTask to load the outlines for a page of content. 663 */ 664 private void prepareGenerateHoloOutlinesTask(int page, ArrayList<Object> items, 665 ArrayList<Bitmap> images) { 666 // Prune old tasks for this page 667 Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator(); 668 while (iter.hasNext()) { 669 AppsCustomizeAsyncTask task = (AppsCustomizeAsyncTask) iter.next(); 670 int taskPage = task.page; 671 if ((taskPage == page) && 672 (task.dataType == AsyncTaskPageData.Type.LoadHolographicIconsData)) { 673 task.cancel(false); 674 iter.remove(); 675 } 676 } 677 678 AsyncTaskPageData pageData = new AsyncTaskPageData(page, items, images, 679 new AsyncTaskCallback() { 680 @Override 681 public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) { 682 // Ensure that this task starts running at the correct priority 683 task.syncThreadPriority(); 684 685 ArrayList<Bitmap> images = data.generatedImages; 686 ArrayList<Bitmap> srcImages = data.sourceImages; 687 int count = srcImages.size(); 688 Canvas c = new Canvas(); 689 for (int i = 0; i < count && !task.isCancelled(); ++i) { 690 // Before work on each item, ensure that this task is running at the correct 691 // priority 692 task.syncThreadPriority(); 693 694 Bitmap b = srcImages.get(i); 695 Bitmap outline = Bitmap.createBitmap(b.getWidth(), b.getHeight(), 696 Bitmap.Config.ARGB_8888); 697 698 c.setBitmap(outline); 699 c.save(); 700 c.drawBitmap(b, 0, 0, null); 701 c.restore(); 702 703 images.add(outline); 704 } 705 } 706 }, 707 new AsyncTaskCallback() { 708 @Override 709 public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) { 710 mRunningTasks.remove(task); 711 if (task.isCancelled()) return; 712 if (task.page > getPageCount()) return; 713 if (task.pageContentType != mContentType) return; 714 onHolographicPageItemsLoaded(data); 715 } 716 }); 717 718 // Ensure that the outline task always runs in the background, serially 719 AppsCustomizeAsyncTask t = 720 new AppsCustomizeAsyncTask(page, mContentType, 721 AsyncTaskPageData.Type.LoadHolographicIconsData); 722 t.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); 723 t.executeOnExecutor(AsyncTask.SERIAL_EXECUTOR, pageData); 724 mRunningTasks.add(t); 725 } 726 727 /* 728 * Widgets PagedView implementation 729 */ 730 private void setupPage(PagedViewGridLayout layout) { 731 layout.setPadding(mPageLayoutPaddingLeft, mPageLayoutPaddingTop, 732 mPageLayoutPaddingRight, mPageLayoutPaddingBottom); 733 734 // Note: We force a measure here to get around the fact that when we do layout calculations 735 // immediately after syncing, we don't have a proper width. 736 int widthSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.AT_MOST); 737 int heightSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.AT_MOST); 738 layout.setMinimumWidth(getPageContentWidth()); 739 layout.measure(widthSpec, heightSpec); 740 } 741 private void renderDrawableToBitmap(Drawable d, Bitmap bitmap, int x, int y, int w, int h, 742 float scaleX, float scaleY) { 743 if (bitmap != null) { 744 Canvas c = new Canvas(bitmap); 745 c.scale(scaleX, scaleY); 746 Rect oldBounds = d.copyBounds(); 747 d.setBounds(x, y, x + w, y + h); 748 d.draw(c); 749 d.setBounds(oldBounds); // Restore the bounds 750 } 751 } 752 private Bitmap getShortcutPreview(ResolveInfo info, int cellWidth, int cellHeight) { 753 // Render the icon 754 Bitmap preview = Bitmap.createBitmap(cellWidth, mAppIconSize, Config.ARGB_8888); 755 Drawable icon = mIconCache.getFullResIcon(info, mPackageManager); 756 renderDrawableToBitmap(icon, preview, 0, 0, mAppIconSize, mAppIconSize, 1f, 1f); 757 return preview; 758 } 759 private Bitmap getWidgetPreview(AppWidgetProviderInfo info, 760 int cellHSpan, int cellVSpan, int cellWidth, int cellHeight) { 761 762 // Calculate the size of the drawable 763 cellHSpan = Math.max(mMinWidgetSpan, Math.min(mMaxWidgetSpan, cellHSpan)); 764 cellVSpan = Math.max(mMinWidgetSpan, Math.min(mMaxWidgetSpan, cellVSpan)); 765 int expectedWidth = mWidgetSpacingLayout.estimateCellWidth(cellHSpan); 766 int expectedHeight = mWidgetSpacingLayout.estimateCellHeight(cellVSpan); 767 768 // Scale down the bitmap to fit the space 769 float widgetPreviewScale = (float) cellWidth / expectedWidth; 770 expectedWidth = (int) (widgetPreviewScale * expectedWidth); 771 expectedHeight = (int) (widgetPreviewScale * expectedHeight); 772 773 // Load the preview image if possible 774 String packageName = info.provider.getPackageName(); 775 Drawable drawable = null; 776 Bitmap preview = null; 777 if (info.previewImage != 0) { 778 drawable = mPackageManager.getDrawable(packageName, info.previewImage, null); 779 if (drawable == null) { 780 Log.w(LOG_TAG, "Can't load icon drawable 0x" + Integer.toHexString(info.icon) 781 + " for provider: " + info.provider); 782 } else { 783 // Scale down the preview to the dimensions we want 784 int imageWidth = drawable.getIntrinsicWidth(); 785 int imageHeight = drawable.getIntrinsicHeight(); 786 float aspect = (float) imageWidth / imageHeight; 787 int newWidth = imageWidth; 788 int newHeight = imageHeight; 789 if (aspect > 1f) { 790 newWidth = expectedWidth; 791 newHeight = (int) (imageHeight * ((float) expectedWidth / imageWidth)); 792 } else { 793 newHeight = expectedHeight; 794 newWidth = (int) (imageWidth * ((float) expectedHeight / imageHeight)); 795 } 796 797 preview = Bitmap.createBitmap(newWidth, newHeight, Config.ARGB_8888); 798 renderDrawableToBitmap(drawable, preview, 0, 0, newWidth, newHeight, 1f, 1f); 799 } 800 } 801 802 // Generate a preview image if we couldn't load one 803 if (drawable == null) { 804 Resources resources = mLauncher.getResources(); 805 int bitmapWidth; 806 int bitmapHeight; 807 808 // Specify the dimensions of the bitmap (since we are using a default preview bg with 809 // the full icon, we only imply the aspect ratio of the widget) 810 if (cellHSpan == cellVSpan) { 811 bitmapWidth = bitmapHeight = cellWidth; 812 expectedWidth = expectedHeight = mWidgetPreviewIconPaddedDimension; 813 } else if (cellHSpan >= cellVSpan) { 814 bitmapWidth = expectedWidth = cellWidth; 815 bitmapHeight = expectedHeight = mWidgetPreviewIconPaddedDimension; 816 } else { 817 // Note that in vertical widgets, we might not have enough space due to the text 818 // label, so be conservative and use the width as a height bound 819 bitmapWidth = expectedWidth = mWidgetPreviewIconPaddedDimension; 820 bitmapHeight = expectedHeight = cellWidth; 821 } 822 823 preview = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Config.ARGB_8888); 824 renderDrawableToBitmap(mDefaultWidgetBackground, preview, 0, 0, expectedWidth, 825 expectedHeight, 1f,1f); 826 827 // Draw the icon in the top left corner 828 try { 829 Drawable icon = null; 830 if (info.icon > 0) icon = mPackageManager.getDrawable(packageName, info.icon, null); 831 if (icon == null) icon = resources.getDrawable(R.drawable.ic_launcher_application); 832 833 int offset = (int) (mAppIconSize * sWidgetPreviewIconPaddingPercentage); 834 renderDrawableToBitmap(icon, preview, offset, offset, 835 mAppIconSize, mAppIconSize, 1f, 1f); 836 } catch (Resources.NotFoundException e) {} 837 } 838 return preview; 839 } 840 public void syncWidgetPages() { 841 // Ensure that we have the right number of pages 842 Context context = getContext(); 843 int numPages = (int) Math.ceil(mWidgets.size() / 844 (float) (mWidgetCountX * mWidgetCountY)); 845 for (int j = 0; j < numPages; ++j) { 846 PagedViewGridLayout layout = new PagedViewGridLayout(context, mWidgetCountX, 847 mWidgetCountY); 848 setupPage(layout); 849 addView(layout); 850 } 851 } 852 public void syncWidgetPageItems(int page) { 853 int numItemsPerPage = mWidgetCountX * mWidgetCountY; 854 int contentWidth = mWidgetSpacingLayout.getContentWidth(); 855 int contentHeight = mWidgetSpacingLayout.getContentHeight(); 856 857 // Calculate the dimensions of each cell we are giving to each widget 858 ArrayList<Object> items = new ArrayList<Object>(); 859 int cellWidth = ((contentWidth - mPageLayoutPaddingLeft - mPageLayoutPaddingRight 860 - ((mWidgetCountX - 1) * mWidgetWidthGap)) / mWidgetCountX); 861 int cellHeight = ((contentHeight - mPageLayoutPaddingTop - mPageLayoutPaddingBottom 862 - ((mWidgetCountY - 1) * mWidgetHeightGap)) / mWidgetCountY); 863 864 int offset = page * numItemsPerPage; 865 for (int i = offset; i < Math.min(offset + numItemsPerPage, mWidgets.size()); ++i) { 866 items.add(mWidgets.get(i)); 867 } 868 869 prepareLoadWidgetPreviewsTask(page, items, cellWidth, cellHeight, mWidgetCountX); 870 } 871 private void onSyncWidgetPageItems(AsyncTaskPageData data) { 872 int page = data.page; 873 PagedViewGridLayout layout = (PagedViewGridLayout) getChildAt(page); 874 // Only set the column count once we have items 875 layout.setColumnCount(layout.getCellCountX()); 876 877 ArrayList<Object> items = data.items; 878 int count = items.size(); 879 int cellWidth = data.cellWidth; 880 int cellHeight = data.cellHeight; 881 int cellCountX = data.cellCountX; 882 for (int i = 0; i < count; ++i) { 883 Object rawInfo = items.get(i); 884 PendingAddItemInfo createItemInfo = null; 885 PagedViewWidget widget = (PagedViewWidget) mLayoutInflater.inflate( 886 R.layout.apps_customize_widget, layout, false); 887 if (rawInfo instanceof AppWidgetProviderInfo) { 888 // Fill in the widget information 889 AppWidgetProviderInfo info = (AppWidgetProviderInfo) rawInfo; 890 createItemInfo = new PendingAddWidgetInfo(info, null, null); 891 int[] cellSpans = CellLayout.rectToCell(getResources(), 892 info.minWidth, info.minHeight, null); 893 FastBitmapDrawable preview = new FastBitmapDrawable(data.generatedImages.get(i)); 894 widget.applyFromAppWidgetProviderInfo(info, preview, -1, cellSpans, 895 mHolographicOutlineHelper); 896 widget.setTag(createItemInfo); 897 } else if (rawInfo instanceof ResolveInfo) { 898 // Fill in the shortcuts information 899 ResolveInfo info = (ResolveInfo) rawInfo; 900 createItemInfo = new PendingAddItemInfo(); 901 createItemInfo.itemType = LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT; 902 createItemInfo.componentName = new ComponentName(info.activityInfo.packageName, 903 info.activityInfo.name); 904 FastBitmapDrawable preview = new FastBitmapDrawable(data.generatedImages.get(i)); 905 widget.applyFromResolveInfo(mPackageManager, info, preview, 906 mHolographicOutlineHelper); 907 widget.setTag(createItemInfo); 908 } 909 widget.setOnClickListener(this); 910 widget.setOnLongClickListener(this); 911 widget.setOnTouchListener(this); 912 913 // Layout each widget 914 int ix = i % cellCountX; 915 int iy = i / cellCountX; 916 GridLayout.LayoutParams lp = new GridLayout.LayoutParams( 917 GridLayout.spec(iy, GridLayout.LEFT), 918 GridLayout.spec(ix, GridLayout.TOP)); 919 lp.width = cellWidth; 920 lp.height = cellHeight; 921 lp.setGravity(Gravity.TOP | Gravity.LEFT); 922 if (ix > 0) lp.leftMargin = mWidgetWidthGap; 923 if (iy > 0) lp.topMargin = mWidgetHeightGap; 924 layout.addView(widget, lp); 925 } 926 927 invalidate(); 928 forceUpdateAdjacentPagesAlpha(); 929 prepareGenerateHoloOutlinesTask(data.page, data.items, data.generatedImages); 930 } 931 private void onHolographicPageItemsLoaded(AsyncTaskPageData data) { 932 // Invalidate early to short-circuit children invalidates 933 invalidate(); 934 935 int page = data.page; 936 ViewGroup layout = (ViewGroup) getChildAt(page); 937 if (layout instanceof PagedViewCellLayout) { 938 PagedViewCellLayout cl = (PagedViewCellLayout) layout; 939 int count = cl.getPageChildCount(); 940 if (count != data.generatedImages.size()) return; 941 for (int i = 0; i < count; ++i) { 942 PagedViewIcon icon = (PagedViewIcon) cl.getChildOnPageAt(i); 943 icon.setHolographicOutline(data.generatedImages.get(i)); 944 } 945 } else { 946 int count = layout.getChildCount(); 947 if (count != data.generatedImages.size()) return; 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(); 958 959 // Remove all background asyc tasks if we are loading content anew 960 Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator(); 961 while (iter.hasNext()) { 962 AppsCustomizeAsyncTask task = (AppsCustomizeAsyncTask) iter.next(); 963 task.cancel(false); 964 iter.remove(); 965 } 966 967 switch (mContentType) { 968 case Applications: 969 syncAppsPages(); 970 break; 971 case Widgets: 972 syncWidgetPages(); 973 break; 974 } 975 } 976 @Override 977 public void syncPageItems(int page) { 978 switch (mContentType) { 979 case Applications: 980 syncAppsPageItems(page); 981 break; 982 case Widgets: 983 syncWidgetPageItems(page); 984 break; 985 } 986 } 987 988 /** 989 * Used by the parent to get the content width to set the tab bar to 990 * @return 991 */ 992 public int getPageContentWidth() { 993 return mContentWidth; 994 } 995 996 @Override 997 protected void onPageBeginMoving() { 998 /* TO BE ENABLED LATER 999 setChildrenDrawnWithCacheEnabled(true); 1000 for (int i = 0; i < getChildCount(); ++i) { 1001 View v = getChildAt(i); 1002 if (v instanceof PagedViewCellLayout) { 1003 ((PagedViewCellLayout) v).setChildrenDrawingCacheEnabled(true); 1004 } 1005 } 1006 */ 1007 super.onPageBeginMoving(); 1008 } 1009 1010 @Override 1011 protected void onPageEndMoving() { 1012 /* TO BE ENABLED LATER 1013 for (int i = 0; i < getChildCount(); ++i) { 1014 View v = getChildAt(i); 1015 if (v instanceof PagedViewCellLayout) { 1016 ((PagedViewCellLayout) v).setChildrenDrawingCacheEnabled(false); 1017 } 1018 } 1019 setChildrenDrawnWithCacheEnabled(false); 1020 */ 1021 super.onPageEndMoving(); 1022 } 1023 1024 /* 1025 * AllAppsView implementation 1026 */ 1027 @Override 1028 public void setup(Launcher launcher, DragController dragController) { 1029 mLauncher = launcher; 1030 mDragController = dragController; 1031 } 1032 @Override 1033 public void zoom(float zoom, boolean animate) { 1034 // TODO-APPS_CUSTOMIZE: Call back to mLauncher.zoomed() 1035 } 1036 @Override 1037 public boolean isVisible() { 1038 return (getVisibility() == VISIBLE); 1039 } 1040 @Override 1041 public boolean isAnimating() { 1042 return false; 1043 } 1044 @Override 1045 public void setApps(ArrayList<ApplicationInfo> list) { 1046 mApps = list; 1047 Collections.sort(mApps, LauncherModel.APP_NAME_COMPARATOR); 1048 1049 // The next layout pass will trigger data-ready if both widgets and apps are set, so 1050 // request a layout to do this test and invalidate the page data when ready. 1051 if (testDataReady()) requestLayout(); 1052 } 1053 private void addAppsWithoutInvalidate(ArrayList<ApplicationInfo> list) { 1054 // We add it in place, in alphabetical order 1055 int count = list.size(); 1056 for (int i = 0; i < count; ++i) { 1057 ApplicationInfo info = list.get(i); 1058 int index = Collections.binarySearch(mApps, info, LauncherModel.APP_NAME_COMPARATOR); 1059 if (index < 0) { 1060 mApps.add(-(index + 1), info); 1061 } 1062 } 1063 } 1064 @Override 1065 public void addApps(ArrayList<ApplicationInfo> list) { 1066 addAppsWithoutInvalidate(list); 1067 invalidatePageData(); 1068 } 1069 private int findAppByComponent(List<ApplicationInfo> list, ApplicationInfo item) { 1070 ComponentName removeComponent = item.intent.getComponent(); 1071 int length = list.size(); 1072 for (int i = 0; i < length; ++i) { 1073 ApplicationInfo info = list.get(i); 1074 if (info.intent.getComponent().equals(removeComponent)) { 1075 return i; 1076 } 1077 } 1078 return -1; 1079 } 1080 private void removeAppsWithoutInvalidate(ArrayList<ApplicationInfo> list) { 1081 // loop through all the apps and remove apps that have the same component 1082 int length = list.size(); 1083 for (int i = 0; i < length; ++i) { 1084 ApplicationInfo info = list.get(i); 1085 int removeIndex = findAppByComponent(mApps, info); 1086 if (removeIndex > -1) { 1087 mApps.remove(removeIndex); 1088 } 1089 } 1090 } 1091 @Override 1092 public void removeApps(ArrayList<ApplicationInfo> list) { 1093 removeAppsWithoutInvalidate(list); 1094 invalidatePageData(); 1095 } 1096 @Override 1097 public void updateApps(ArrayList<ApplicationInfo> list) { 1098 // We remove and re-add the updated applications list because it's properties may have 1099 // changed (ie. the title), and this will ensure that the items will be in their proper 1100 // place in the list. 1101 removeAppsWithoutInvalidate(list); 1102 addAppsWithoutInvalidate(list); 1103 invalidatePageData(); 1104 } 1105 1106 @Override 1107 public void reset() { 1108 if (mContentType != ContentType.Applications) { 1109 // Reset to the first page of the Apps pane 1110 AppsCustomizeTabHost tabs = (AppsCustomizeTabHost) 1111 mLauncher.findViewById(R.id.apps_customize_pane); 1112 tabs.selectAppsTab(); 1113 } else if (getCurrentPage() != 0) { 1114 invalidatePageData(0); 1115 } 1116 } 1117 @Override 1118 public void dumpState() { 1119 // TODO: Dump information related to current list of Applications, Widgets, etc. 1120 ApplicationInfo.dumpApplicationInfoList(LOG_TAG, "mApps", mApps); 1121 dumpAppWidgetProviderInfoList(LOG_TAG, "mWidgets", mWidgets); 1122 } 1123 private void dumpAppWidgetProviderInfoList(String tag, String label, 1124 ArrayList<Object> list) { 1125 Log.d(tag, label + " size=" + list.size()); 1126 for (Object i: list) { 1127 if (i instanceof AppWidgetProviderInfo) { 1128 AppWidgetProviderInfo info = (AppWidgetProviderInfo) i; 1129 Log.d(tag, " label=\"" + info.label + "\" previewImage=" + info.previewImage 1130 + " resizeMode=" + info.resizeMode + " configure=" + info.configure 1131 + " initialLayout=" + info.initialLayout 1132 + " minWidth=" + info.minWidth + " minHeight=" + info.minHeight); 1133 } else if (i instanceof ResolveInfo) { 1134 ResolveInfo info = (ResolveInfo) i; 1135 Log.d(tag, " label=\"" + info.loadLabel(mPackageManager) + "\" icon=" 1136 + info.icon); 1137 } 1138 } 1139 } 1140 @Override 1141 public void surrender() { 1142 // TODO: If we are in the middle of any process (ie. for holographic outlines, etc) we 1143 // should stop this now. 1144 } 1145 1146 /* 1147 * We load an extra page on each side to prevent flashes from scrolling and loading of the 1148 * widget previews in the background with the AsyncTasks. 1149 */ 1150 protected int getAssociatedLowerPageBound(int page) { 1151 return Math.max(0, page - 2); 1152 } 1153 protected int getAssociatedUpperPageBound(int page) { 1154 final int count = getChildCount(); 1155 return Math.min(page + 2, count - 1); 1156 } 1157 1158 @Override 1159 protected String getCurrentPageDescription() { 1160 int page = (mNextPage != INVALID_PAGE) ? mNextPage : mCurrentPage; 1161 int stringId = R.string.default_scroll_format; 1162 switch (mContentType) { 1163 case Applications: 1164 stringId = R.string.apps_customize_apps_scroll_format; 1165 break; 1166 case Widgets: 1167 stringId = R.string.apps_customize_widgets_scroll_format; 1168 break; 1169 } 1170 return String.format(mContext.getString(stringId), page + 1, getChildCount()); 1171 } 1172} 1173