AppsCustomizeTabHost.java revision 8b805b17158886035b38261eb611d8641701ae43
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.Animator; 20import android.animation.AnimatorListenerAdapter; 21import android.animation.AnimatorSet; 22import android.animation.ObjectAnimator; 23import android.content.Context; 24import android.content.res.Resources; 25import android.util.AttributeSet; 26import android.view.LayoutInflater; 27import android.view.MotionEvent; 28import android.view.View; 29import android.view.ViewGroup; 30import android.widget.FrameLayout; 31import android.widget.LinearLayout; 32import android.widget.TabHost; 33import android.widget.TabWidget; 34import android.widget.TextView; 35 36import com.android.launcher.R; 37 38import java.util.ArrayList; 39 40public class AppsCustomizeTabHost extends TabHost implements LauncherTransitionable, 41 TabHost.OnTabChangeListener { 42 static final String LOG_TAG = "AppsCustomizeTabHost"; 43 44 private static final String APPS_TAB_TAG = "APPS"; 45 private static final String WIDGETS_TAB_TAG = "WIDGETS"; 46 47 private final LayoutInflater mLayoutInflater; 48 private ViewGroup mTabs; 49 private ViewGroup mTabsContainer; 50 private AppsCustomizePagedView mAppsCustomizePane; 51 private boolean mSuppressContentCallback = false; 52 private FrameLayout mAnimationBuffer; 53 private LinearLayout mContent; 54 55 private boolean mInTransition; 56 private boolean mTransitioningToWorkspace; 57 private boolean mResetAfterTransition; 58 private Runnable mRelayoutAndMakeVisible; 59 60 private Launcher mLauncher; 61 62 public AppsCustomizeTabHost(Context context, AttributeSet attrs) { 63 super(context, attrs); 64 mLayoutInflater = LayoutInflater.from(context); 65 mRelayoutAndMakeVisible = new Runnable() { 66 public void run() { 67 mTabs.requestLayout(); 68 mTabsContainer.setAlpha(1f); 69 } 70 }; 71 } 72 73 public void setup(Launcher launcher) { 74 mLauncher = launcher; 75 } 76 77 /** 78 * Convenience methods to select specific tabs. We want to set the content type immediately 79 * in these cases, but we note that we still call setCurrentTabByTag() so that the tab view 80 * reflects the new content (but doesn't do the animation and logic associated with changing 81 * tabs manually). 82 */ 83 private void setContentTypeImmediate(AppsCustomizePagedView.ContentType type) { 84 onTabChangedStart(); 85 onTabChangedEnd(type); 86 } 87 void selectAppsTab() { 88 setContentTypeImmediate(AppsCustomizePagedView.ContentType.Applications); 89 setCurrentTabByTag(APPS_TAB_TAG); 90 } 91 void selectWidgetsTab() { 92 setContentTypeImmediate(AppsCustomizePagedView.ContentType.Widgets); 93 setCurrentTabByTag(WIDGETS_TAB_TAG); 94 } 95 96 /** 97 * Setup the tab host and create all necessary tabs. 98 */ 99 @Override 100 protected void onFinishInflate() { 101 // Setup the tab host 102 setup(); 103 104 final ViewGroup tabsContainer = (ViewGroup) findViewById(R.id.tabs_container); 105 final TabWidget tabs = getTabWidget(); 106 final AppsCustomizePagedView appsCustomizePane = (AppsCustomizePagedView) 107 findViewById(R.id.apps_customize_pane_content); 108 mTabs = tabs; 109 mTabsContainer = tabsContainer; 110 mAppsCustomizePane = appsCustomizePane; 111 mAnimationBuffer = (FrameLayout) findViewById(R.id.animation_buffer); 112 mContent = (LinearLayout) findViewById(R.id.apps_customize_content); 113 if (tabs == null || mAppsCustomizePane == null) throw new Resources.NotFoundException(); 114 115 // Configure the tabs content factory to return the same paged view (that we change the 116 // content filter on) 117 TabContentFactory contentFactory = new TabContentFactory() { 118 public View createTabContent(String tag) { 119 return appsCustomizePane; 120 } 121 }; 122 123 // Create the tabs 124 TextView tabView; 125 String label; 126 label = getContext().getString(R.string.all_apps_button_label); 127 tabView = (TextView) mLayoutInflater.inflate(R.layout.tab_widget_indicator, tabs, false); 128 tabView.setText(label); 129 tabView.setContentDescription(label); 130 addTab(newTabSpec(APPS_TAB_TAG).setIndicator(tabView).setContent(contentFactory)); 131 label = getContext().getString(R.string.widgets_tab_label); 132 tabView = (TextView) mLayoutInflater.inflate(R.layout.tab_widget_indicator, tabs, false); 133 tabView.setText(label); 134 tabView.setContentDescription(label); 135 addTab(newTabSpec(WIDGETS_TAB_TAG).setIndicator(tabView).setContent(contentFactory)); 136 setOnTabChangedListener(this); 137 138 // Setup the key listener to jump between the last tab view and the market icon 139 AppsCustomizeTabKeyEventListener keyListener = new AppsCustomizeTabKeyEventListener(); 140 View lastTab = tabs.getChildTabViewAt(tabs.getTabCount() - 1); 141 lastTab.setOnKeyListener(keyListener); 142 View shopButton = findViewById(R.id.market_button); 143 shopButton.setOnKeyListener(keyListener); 144 145 // Hide the tab bar until we measure 146 mTabsContainer.setAlpha(0f); 147 } 148 149 @Override 150 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 151 boolean remeasureTabWidth = (mTabs.getLayoutParams().width <= 0); 152 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 153 154 // Set the width of the tab list to the content width 155 if (remeasureTabWidth) { 156 int contentWidth = mAppsCustomizePane.getPageContentWidth(); 157 if (contentWidth > 0 && mTabs.getLayoutParams().width != contentWidth) { 158 // Set the width and show the tab bar 159 mTabs.getLayoutParams().width = contentWidth; 160 post(mRelayoutAndMakeVisible); 161 } 162 } 163 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 164 } 165 166 public boolean onInterceptTouchEvent(MotionEvent ev) { 167 // If we are mid transition then intercept touch events here so we can ignore them 168 if (mInTransition) { 169 return true; 170 } 171 return super.onInterceptTouchEvent(ev); 172 }; 173 174 @Override 175 public boolean onTouchEvent(MotionEvent event) { 176 // Allow touch events to fall through if we are transitioning to the workspace 177 if (mInTransition) { 178 if (mTransitioningToWorkspace) { 179 return super.onTouchEvent(event); 180 } 181 } 182 183 // Intercept all touch events up to the bottom of the AppsCustomizePane so they do not fall 184 // through to the workspace and trigger showWorkspace() 185 if (event.getY() < mAppsCustomizePane.getBottom()) { 186 return true; 187 } 188 return super.onTouchEvent(event); 189 } 190 191 private void onTabChangedStart() { 192 mAppsCustomizePane.hideScrollingIndicator(false); 193 } 194 195 private void reloadCurrentPage() { 196 if (!LauncherApplication.isScreenLarge()) { 197 mAppsCustomizePane.flashScrollingIndicator(true); 198 } 199 mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage()); 200 mAppsCustomizePane.requestFocus(); 201 } 202 203 private void onTabChangedEnd(AppsCustomizePagedView.ContentType type) { 204 mAppsCustomizePane.setContentType(type); 205 } 206 207 @Override 208 public void onTabChanged(String tabId) { 209 final AppsCustomizePagedView.ContentType type = getContentTypeForTabTag(tabId); 210 if (mSuppressContentCallback) { 211 mSuppressContentCallback = false; 212 return; 213 } 214 215 // Animate the changing of the tab content by fading pages in and out 216 final Resources res = getResources(); 217 final int duration = res.getInteger(R.integer.config_tabTransitionDuration); 218 219 // We post a runnable here because there is a delay while the first page is loading and 220 // the feedback from having changed the tab almost feels better than having it stick 221 post(new Runnable() { 222 @Override 223 public void run() { 224 if (mAppsCustomizePane.getMeasuredWidth() <= 0 || 225 mAppsCustomizePane.getMeasuredHeight() <= 0) { 226 reloadCurrentPage(); 227 return; 228 } 229 230 // Take the visible pages and re-parent them temporarily to mAnimatorBuffer 231 // and then cross fade to the new pages 232 int[] visiblePageRange = new int[2]; 233 mAppsCustomizePane.getVisiblePages(visiblePageRange); 234 if (visiblePageRange[0] == -1 && visiblePageRange[1] == -1) { 235 // If we can't get the visible page ranges, then just skip the animation 236 reloadCurrentPage(); 237 return; 238 } 239 ArrayList<View> visiblePages = new ArrayList<View>(); 240 for (int i = visiblePageRange[0]; i <= visiblePageRange[1]; i++) { 241 visiblePages.add(mAppsCustomizePane.getPageAt(i)); 242 } 243 244 // We want the pages to be rendered in exactly the same way as they were when 245 // their parent was mAppsCustomizePane -- so set the scroll on mAnimationBuffer 246 // to be exactly the same as mAppsCustomizePane, and below, set the left/top 247 // parameters to be correct for each of the pages 248 mAnimationBuffer.scrollTo(mAppsCustomizePane.getScrollX(), 0); 249 250 // mAppsCustomizePane renders its children in reverse order, so 251 // add the pages to mAnimationBuffer in reverse order to match that behavior 252 for (int i = visiblePages.size() - 1; i >= 0; i--) { 253 View child = visiblePages.get(i); 254 if (child instanceof PagedViewCellLayout) { 255 ((PagedViewCellLayout) child).resetChildrenOnKeyListeners(); 256 } else if (child instanceof PagedViewGridLayout) { 257 ((PagedViewGridLayout) child).resetChildrenOnKeyListeners(); 258 } 259 PagedViewWidget.setDeletePreviewsWhenDetachedFromWindow(false); 260 mAppsCustomizePane.removeView(child); 261 PagedViewWidget.setDeletePreviewsWhenDetachedFromWindow(true); 262 mAnimationBuffer.setAlpha(1f); 263 mAnimationBuffer.setVisibility(View.VISIBLE); 264 LayoutParams p = new FrameLayout.LayoutParams(child.getMeasuredWidth(), 265 child.getMeasuredHeight()); 266 p.setMargins((int) child.getLeft(), (int) child.getTop(), 0, 0); 267 mAnimationBuffer.addView(child, p); 268 } 269 270 // Toggle the new content 271 onTabChangedStart(); 272 onTabChangedEnd(type); 273 274 // Animate the transition 275 ObjectAnimator outAnim = ObjectAnimator.ofFloat(mAnimationBuffer, "alpha", 0f); 276 outAnim.addListener(new AnimatorListenerAdapter() { 277 @Override 278 public void onAnimationEnd(Animator animation) { 279 mAnimationBuffer.setVisibility(View.GONE); 280 mAnimationBuffer.removeAllViews(); 281 } 282 @Override 283 public void onAnimationCancel(Animator animation) { 284 mAnimationBuffer.setVisibility(View.GONE); 285 mAnimationBuffer.removeAllViews(); 286 } 287 }); 288 ObjectAnimator inAnim = ObjectAnimator.ofFloat(mAppsCustomizePane, "alpha", 1f); 289 inAnim.addListener(new AnimatorListenerAdapter() { 290 @Override 291 public void onAnimationEnd(Animator animation) { 292 reloadCurrentPage(); 293 } 294 }); 295 AnimatorSet animSet = new AnimatorSet(); 296 animSet.playTogether(outAnim, inAnim); 297 animSet.setDuration(duration); 298 animSet.start(); 299 } 300 }); 301 } 302 303 public void setCurrentTabFromContent(AppsCustomizePagedView.ContentType type) { 304 mSuppressContentCallback = true; 305 setCurrentTabByTag(getTabTagForContentType(type)); 306 } 307 308 /** 309 * Returns the content type for the specified tab tag. 310 */ 311 public AppsCustomizePagedView.ContentType getContentTypeForTabTag(String tag) { 312 if (tag.equals(APPS_TAB_TAG)) { 313 return AppsCustomizePagedView.ContentType.Applications; 314 } else if (tag.equals(WIDGETS_TAB_TAG)) { 315 return AppsCustomizePagedView.ContentType.Widgets; 316 } 317 return AppsCustomizePagedView.ContentType.Applications; 318 } 319 320 /** 321 * Returns the tab tag for a given content type. 322 */ 323 public String getTabTagForContentType(AppsCustomizePagedView.ContentType type) { 324 if (type == AppsCustomizePagedView.ContentType.Applications) { 325 return APPS_TAB_TAG; 326 } else if (type == AppsCustomizePagedView.ContentType.Widgets) { 327 return WIDGETS_TAB_TAG; 328 } 329 return APPS_TAB_TAG; 330 } 331 332 /** 333 * Disable focus on anything under this view in the hierarchy if we are not visible. 334 */ 335 @Override 336 public int getDescendantFocusability() { 337 if (getVisibility() != View.VISIBLE) { 338 return ViewGroup.FOCUS_BLOCK_DESCENDANTS; 339 } 340 return super.getDescendantFocusability(); 341 } 342 343 void reset() { 344 if (mInTransition) { 345 // Defer to after the transition to reset 346 mResetAfterTransition = true; 347 } else { 348 // Reset immediately 349 mAppsCustomizePane.reset(); 350 } 351 } 352 353 private void enableAndBuildHardwareLayer() { 354 // isHardwareAccelerated() checks if we're attached to a window and if that 355 // window is HW accelerated-- we were sometimes not attached to a window 356 // and buildLayer was throwing an IllegalStateException 357 if (isHardwareAccelerated()) { 358 // Turn on hardware layers for performance 359 setLayerType(LAYER_TYPE_HARDWARE, null); 360 361 // force building the layer, so you don't get a blip early in an animation 362 // when the layer is created layer 363 buildLayer(); 364 365 // Let the GC system know that now is a good time to do any garbage 366 // collection; makes it less likely we'll get a GC during the all apps 367 // to workspace animation 368 System.gc(); 369 } 370 } 371 372 @Override 373 public View getContent() { 374 return mContent; 375 } 376 377 /* LauncherTransitionable overrides */ 378 @Override 379 public void onLauncherTransitionStart(Launcher l, boolean animated, boolean toWorkspace) { 380 mAppsCustomizePane.onLauncherTransitionStart(l, animated, toWorkspace); 381 mInTransition = true; 382 mTransitioningToWorkspace = toWorkspace; 383 384 if (toWorkspace) { 385 // Going from All Apps -> Workspace 386 setVisibilityOfSiblingsWithLowerZOrder(VISIBLE); 387 // Stop the scrolling indicator - we don't want All Apps to be invalidating itself 388 // during the transition, especially since it has a hardware layer set on it 389 mAppsCustomizePane.cancelScrollingIndicatorAnimations(); 390 } else { 391 // Going from Workspace -> All Apps 392 mContent.setVisibility(VISIBLE); 393 394 // Make sure the current page is loaded (we start loading the side pages after the 395 // transition to prevent slowing down the animation) 396 mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage(), true); 397 398 if (!LauncherApplication.isScreenLarge()) { 399 mAppsCustomizePane.showScrollingIndicator(true); 400 } 401 } 402 403 if (mResetAfterTransition) { 404 mAppsCustomizePane.reset(); 405 mResetAfterTransition = false; 406 } 407 408 if (animated) { 409 enableAndBuildHardwareLayer(); 410 } 411 } 412 413 @Override 414 public void onLauncherTransitionStep(Launcher l, float t) { 415 // Do nothing 416 } 417 418 @Override 419 public void onLauncherTransitionEnd(Launcher l, boolean animated, boolean toWorkspace) { 420 mAppsCustomizePane.onLauncherTransitionEnd(l, animated, toWorkspace); 421 mInTransition = false; 422 if (animated) { 423 setLayerType(LAYER_TYPE_NONE, null); 424 } 425 426 if (!toWorkspace) { 427 // Going from Workspace -> All Apps 428 setVisibilityOfSiblingsWithLowerZOrder(INVISIBLE); 429 430 // Dismiss the workspace cling and show the all apps cling (if not already shown) 431 l.dismissWorkspaceCling(null); 432 mAppsCustomizePane.showAllAppsCling(); 433 // Make sure adjacent pages are loaded (we wait until after the transition to 434 // prevent slowing down the animation) 435 mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage()); 436 437 if (!LauncherApplication.isScreenLarge()) { 438 mAppsCustomizePane.hideScrollingIndicator(false); 439 } 440 } 441 } 442 443 private void setVisibilityOfSiblingsWithLowerZOrder(int visibility) { 444 ViewGroup parent = (ViewGroup) getParent(); 445 if (parent == null) return; 446 447 final int count = parent.getChildCount(); 448 if (!isChildrenDrawingOrderEnabled()) { 449 for (int i = 0; i < count; i++) { 450 final View child = parent.getChildAt(i); 451 if (child == this) { 452 break; 453 } else { 454 if (child.getVisibility() == GONE) { 455 continue; 456 } 457 child.setVisibility(visibility); 458 } 459 } 460 } else { 461 throw new RuntimeException("Failed; can't get z-order of views"); 462 } 463 } 464 465 public void onWindowVisible() { 466 if (getVisibility() == VISIBLE) { 467 mContent.setVisibility(VISIBLE); 468 // We unload the widget previews when the UI is hidden, so need to reload pages 469 // Load the current page synchronously, and the neighboring pages asynchronously 470 mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage(), true); 471 mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage()); 472 473 // We had to enable the wallpaper visibility when launching apps from all apps (so that 474 // the transitions would be the same as when launching from workspace) so we need to 475 // re-disable the wallpaper visibility to ensure performance. 476 int duration = getResources().getInteger(android.R.integer.config_shortAnimTime); 477 postDelayed(new Runnable() { 478 @Override 479 public void run() { 480 mLauncher.updateWallpaperVisibility(false); 481 } 482 }, duration); 483 } 484 } 485 486 public void onTrimMemory() { 487 mContent.setVisibility(GONE); 488 // Clear the widget pages of all their subviews - this will trigger the widget previews 489 // to delete their bitmaps 490 mAppsCustomizePane.clearAllWidgetPages(); 491 } 492 493 boolean isTransitioning() { 494 return mInTransition; 495 } 496} 497