| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.recents.model; |
| |
| import android.app.ActivityManager; |
| import android.content.ComponentCallbacks2; |
| import android.content.Context; |
| import android.content.pm.ActivityInfo; |
| import android.content.res.Resources; |
| import android.graphics.Bitmap; |
| import android.graphics.drawable.BitmapDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.util.Log; |
| |
| import com.android.systemui.R; |
| import com.android.systemui.recents.Constants; |
| import com.android.systemui.recents.RecentsConfiguration; |
| import com.android.systemui.recents.misc.SystemServicesProxy; |
| |
| import java.util.Collection; |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| |
| |
| /** Handle to an ActivityInfo */ |
| class ActivityInfoHandle { |
| ActivityInfo info; |
| } |
| |
| /** A bitmap load queue */ |
| class TaskResourceLoadQueue { |
| ConcurrentLinkedQueue<Task> mQueue = new ConcurrentLinkedQueue<Task>(); |
| |
| /** Adds a new task to the load queue */ |
| void addTasks(Collection<Task> tasks) { |
| for (Task t : tasks) { |
| if (!mQueue.contains(t)) { |
| mQueue.add(t); |
| } |
| } |
| synchronized(this) { |
| notifyAll(); |
| } |
| } |
| |
| /** Adds a new task to the load queue */ |
| void addTask(Task t) { |
| if (!mQueue.contains(t)) { |
| mQueue.add(t); |
| } |
| synchronized(this) { |
| notifyAll(); |
| } |
| } |
| |
| /** |
| * Retrieves the next task from the load queue, as well as whether we want that task to be |
| * force reloaded. |
| */ |
| Task nextTask() { |
| return mQueue.poll(); |
| } |
| |
| /** Removes a task from the load queue */ |
| void removeTask(Task t) { |
| mQueue.remove(t); |
| } |
| |
| /** Clears all the tasks from the load queue */ |
| void clearTasks() { |
| mQueue.clear(); |
| } |
| |
| /** Returns whether the load queue is empty */ |
| boolean isEmpty() { |
| return mQueue.isEmpty(); |
| } |
| } |
| |
| /* Task resource loader */ |
| class TaskResourceLoader implements Runnable { |
| static String TAG = "TaskResourceLoader"; |
| static boolean DEBUG = false; |
| |
| Context mContext; |
| HandlerThread mLoadThread; |
| Handler mLoadThreadHandler; |
| Handler mMainThreadHandler; |
| |
| SystemServicesProxy mSystemServicesProxy; |
| TaskResourceLoadQueue mLoadQueue; |
| DrawableLruCache mApplicationIconCache; |
| BitmapLruCache mThumbnailCache; |
| Bitmap mDefaultThumbnail; |
| BitmapDrawable mDefaultApplicationIcon; |
| |
| boolean mCancelled; |
| boolean mWaitingOnLoadQueue; |
| |
| /** Constructor, creates a new loading thread that loads task resources in the background */ |
| public TaskResourceLoader(TaskResourceLoadQueue loadQueue, DrawableLruCache applicationIconCache, |
| BitmapLruCache thumbnailCache, Bitmap defaultThumbnail, |
| BitmapDrawable defaultApplicationIcon) { |
| mLoadQueue = loadQueue; |
| mApplicationIconCache = applicationIconCache; |
| mThumbnailCache = thumbnailCache; |
| mDefaultThumbnail = defaultThumbnail; |
| mDefaultApplicationIcon = defaultApplicationIcon; |
| mMainThreadHandler = new Handler(); |
| mLoadThread = new HandlerThread("Recents-TaskResourceLoader", |
| android.os.Process.THREAD_PRIORITY_BACKGROUND); |
| mLoadThread.start(); |
| mLoadThreadHandler = new Handler(mLoadThread.getLooper()); |
| mLoadThreadHandler.post(this); |
| } |
| |
| /** Restarts the loader thread */ |
| void start(Context context) { |
| mContext = context; |
| mCancelled = false; |
| mSystemServicesProxy = new SystemServicesProxy(context); |
| // Notify the load thread to start loading |
| synchronized(mLoadThread) { |
| mLoadThread.notifyAll(); |
| } |
| } |
| |
| /** Requests the loader thread to stop after the current iteration */ |
| void stop() { |
| // Mark as cancelled for the thread to pick up |
| mCancelled = true; |
| mSystemServicesProxy = null; |
| // If we are waiting for the load queue for more tasks, then we can just reset the |
| // Context now, since nothing is using it |
| if (mWaitingOnLoadQueue) { |
| mContext = null; |
| } |
| } |
| |
| @Override |
| public void run() { |
| while (true) { |
| if (mCancelled) { |
| // We have to unset the context here, since the background thread may be using it |
| // when we call stop() |
| mContext = null; |
| // If we are cancelled, then wait until we are started again |
| synchronized(mLoadThread) { |
| try { |
| mLoadThread.wait(); |
| } catch (InterruptedException ie) { |
| ie.printStackTrace(); |
| } |
| } |
| } else { |
| RecentsConfiguration config = RecentsConfiguration.getInstance(); |
| SystemServicesProxy ssp = mSystemServicesProxy; |
| // If we've stopped the loader, then fall through to the above logic to wait on |
| // the load thread |
| if (ssp != null) { |
| // Load the next item from the queue |
| final Task t = mLoadQueue.nextTask(); |
| if (t != null) { |
| Drawable cachedIcon = mApplicationIconCache.get(t.key); |
| Bitmap cachedThumbnail = mThumbnailCache.get(t.key); |
| |
| // Load the application icon if it is stale or we haven't cached one yet |
| if (cachedIcon == null) { |
| cachedIcon = getTaskDescriptionIcon(t.key, t.icon, t.iconFilename, ssp, |
| mContext.getResources()); |
| |
| if (cachedIcon == null) { |
| ActivityInfo info = ssp.getActivityInfo( |
| t.key.baseIntent.getComponent(), t.key.userId); |
| if (info != null) { |
| if (DEBUG) Log.d(TAG, "Loading icon: " + t.key); |
| cachedIcon = ssp.getActivityIcon(info, t.key.userId); |
| } |
| } |
| |
| if (cachedIcon == null) { |
| cachedIcon = mDefaultApplicationIcon; |
| } |
| |
| // At this point, even if we can't load the icon, we will set the |
| // default icon. |
| mApplicationIconCache.put(t.key, cachedIcon); |
| } |
| // Load the thumbnail if it is stale or we haven't cached one yet |
| if (cachedThumbnail == null) { |
| if (config.svelteLevel < RecentsConfiguration.SVELTE_DISABLE_LOADING) { |
| if (DEBUG) Log.d(TAG, "Loading thumbnail: " + t.key); |
| cachedThumbnail = ssp.getTaskThumbnail(t.key.id); |
| } |
| if (cachedThumbnail == null) { |
| cachedThumbnail = mDefaultThumbnail; |
| } |
| // When svelte, we trim the memory to just the visible thumbnails when |
| // leaving, so don't thrash the cache as the user scrolls (just load |
| // them from scratch each time) |
| if (config.svelteLevel < RecentsConfiguration.SVELTE_LIMIT_CACHE) { |
| mThumbnailCache.put(t.key, cachedThumbnail); |
| } |
| } |
| if (!mCancelled) { |
| // Notify that the task data has changed |
| final Drawable newIcon = cachedIcon; |
| final Bitmap newThumbnail = cachedThumbnail == mDefaultThumbnail |
| ? null : cachedThumbnail; |
| mMainThreadHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| t.notifyTaskDataLoaded(newThumbnail, newIcon); |
| } |
| }); |
| } |
| } |
| } |
| |
| // If there are no other items in the list, then just wait until something is added |
| if (!mCancelled && mLoadQueue.isEmpty()) { |
| synchronized(mLoadQueue) { |
| try { |
| mWaitingOnLoadQueue = true; |
| mLoadQueue.wait(); |
| mWaitingOnLoadQueue = false; |
| } catch (InterruptedException ie) { |
| ie.printStackTrace(); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| Drawable getTaskDescriptionIcon(Task.TaskKey taskKey, Bitmap iconBitmap, String iconFilename, |
| SystemServicesProxy ssp, Resources res) { |
| Bitmap tdIcon = iconBitmap != null |
| ? iconBitmap |
| : ActivityManager.TaskDescription.loadTaskDescriptionIcon(iconFilename); |
| if (tdIcon != null) { |
| return ssp.getBadgedIcon(new BitmapDrawable(res, tdIcon), taskKey.userId); |
| } |
| return null; |
| } |
| } |
| |
| /* Recents task loader |
| * NOTE: We should not hold any references to a Context from a static instance */ |
| public class RecentsTaskLoader { |
| private static final String TAG = "RecentsTaskLoader"; |
| |
| static RecentsTaskLoader sInstance; |
| static int INVALID_TASK_ID = -1; |
| |
| SystemServicesProxy mSystemServicesProxy; |
| DrawableLruCache mApplicationIconCache; |
| BitmapLruCache mThumbnailCache; |
| StringLruCache mActivityLabelCache; |
| TaskResourceLoadQueue mLoadQueue; |
| TaskResourceLoader mLoader; |
| |
| RecentsPackageMonitor mPackageMonitor; |
| |
| int mMaxThumbnailCacheSize; |
| int mMaxIconCacheSize; |
| int mNumVisibleTasksLoaded; |
| int mNumVisibleThumbnailsLoaded; |
| |
| BitmapDrawable mDefaultApplicationIcon; |
| Bitmap mDefaultThumbnail; |
| |
| /** Private Constructor */ |
| private RecentsTaskLoader(Context context) { |
| mMaxThumbnailCacheSize = context.getResources().getInteger( |
| R.integer.config_recents_max_thumbnail_count); |
| mMaxIconCacheSize = context.getResources().getInteger( |
| R.integer.config_recents_max_icon_count); |
| int iconCacheSize = Constants.DebugFlags.App.DisableBackgroundCache ? 1 : |
| mMaxIconCacheSize; |
| int thumbnailCacheSize = Constants.DebugFlags.App.DisableBackgroundCache ? 1 : |
| mMaxThumbnailCacheSize; |
| |
| // Create the default assets |
| Bitmap icon = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); |
| icon.eraseColor(0x00000000); |
| mDefaultThumbnail = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); |
| mDefaultThumbnail.setHasAlpha(false); |
| mDefaultThumbnail.eraseColor(0xFFffffff); |
| mDefaultApplicationIcon = new BitmapDrawable(context.getResources(), icon); |
| |
| // Initialize the proxy, cache and loaders |
| mSystemServicesProxy = new SystemServicesProxy(context); |
| mPackageMonitor = new RecentsPackageMonitor(); |
| mLoadQueue = new TaskResourceLoadQueue(); |
| mApplicationIconCache = new DrawableLruCache(iconCacheSize); |
| mThumbnailCache = new BitmapLruCache(thumbnailCacheSize); |
| mActivityLabelCache = new StringLruCache(100); |
| mLoader = new TaskResourceLoader(mLoadQueue, mApplicationIconCache, mThumbnailCache, |
| mDefaultThumbnail, mDefaultApplicationIcon); |
| } |
| |
| /** Initializes the recents task loader */ |
| public static RecentsTaskLoader initialize(Context context) { |
| if (sInstance == null) { |
| sInstance = new RecentsTaskLoader(context); |
| } |
| return sInstance; |
| } |
| |
| /** Returns the current recents task loader */ |
| public static RecentsTaskLoader getInstance() { |
| return sInstance; |
| } |
| |
| /** Returns the system services proxy */ |
| public SystemServicesProxy getSystemServicesProxy() { |
| return mSystemServicesProxy; |
| } |
| |
| /** Returns the activity label using as many cached values as we can. */ |
| public String getAndUpdateActivityLabel(Task.TaskKey taskKey, |
| ActivityManager.TaskDescription td, SystemServicesProxy ssp, |
| ActivityInfoHandle infoHandle) { |
| // Return the task description label if it exists |
| if (td != null && td.getLabel() != null) { |
| return td.getLabel(); |
| } |
| // Return the cached activity label if it exists |
| String label = mActivityLabelCache.getAndInvalidateIfModified(taskKey); |
| if (label != null) { |
| return label; |
| } |
| // All short paths failed, load the label from the activity info and cache it |
| if (infoHandle.info == null) { |
| infoHandle.info = ssp.getActivityInfo(taskKey.baseIntent.getComponent(), |
| taskKey.userId); |
| } |
| if (infoHandle.info != null) { |
| label = ssp.getActivityLabel(infoHandle.info); |
| mActivityLabelCache.put(taskKey, label); |
| } else { |
| Log.w(TAG, "Missing ActivityInfo for " + taskKey.baseIntent.getComponent() |
| + " u=" + taskKey.userId); |
| } |
| return label; |
| } |
| |
| /** Returns the activity icon using as many cached values as we can. */ |
| public Drawable getAndUpdateActivityIcon(Task.TaskKey taskKey, |
| ActivityManager.TaskDescription td, SystemServicesProxy ssp, |
| Resources res, ActivityInfoHandle infoHandle, boolean loadIfNotCached) { |
| // Return the cached activity icon if it exists |
| Drawable icon = mApplicationIconCache.getAndInvalidateIfModified(taskKey); |
| if (icon != null) { |
| return icon; |
| } |
| |
| if (loadIfNotCached) { |
| // Return and cache the task description icon if it exists |
| Drawable tdDrawable = mLoader.getTaskDescriptionIcon(taskKey, td.getInMemoryIcon(), |
| td.getIconFilename(), ssp, res); |
| if (tdDrawable != null) { |
| mApplicationIconCache.put(taskKey, tdDrawable); |
| return tdDrawable; |
| } |
| |
| // Load the icon from the activity info and cache it |
| if (infoHandle.info == null) { |
| infoHandle.info = ssp.getActivityInfo(taskKey.baseIntent.getComponent(), |
| taskKey.userId); |
| } |
| if (infoHandle.info != null) { |
| icon = ssp.getActivityIcon(infoHandle.info, taskKey.userId); |
| if (icon != null) { |
| mApplicationIconCache.put(taskKey, icon); |
| return icon; |
| } |
| } |
| } |
| // We couldn't load any icon |
| return null; |
| } |
| |
| /** Returns the bitmap using as many cached values as we can. */ |
| public Bitmap getAndUpdateThumbnail(Task.TaskKey taskKey, SystemServicesProxy ssp, |
| boolean loadIfNotCached) { |
| // Return the cached thumbnail if it exists |
| Bitmap thumbnail = mThumbnailCache.getAndInvalidateIfModified(taskKey); |
| if (thumbnail != null) { |
| return thumbnail; |
| } |
| |
| RecentsConfiguration config = RecentsConfiguration.getInstance(); |
| if (config.svelteLevel < RecentsConfiguration.SVELTE_DISABLE_LOADING && loadIfNotCached) { |
| // Load the thumbnail from the system |
| thumbnail = ssp.getTaskThumbnail(taskKey.id); |
| if (thumbnail != null) { |
| mThumbnailCache.put(taskKey, thumbnail); |
| return thumbnail; |
| } |
| } |
| // We couldn't load any thumbnail |
| return null; |
| } |
| |
| /** Returns the activity's primary color. */ |
| public int getActivityPrimaryColor(ActivityManager.TaskDescription td, |
| RecentsConfiguration config) { |
| if (td != null && td.getPrimaryColor() != 0) { |
| return td.getPrimaryColor(); |
| } |
| return config.taskBarViewDefaultBackgroundColor; |
| } |
| |
| /** Returns the size of the app icon cache. */ |
| public int getApplicationIconCacheSize() { |
| return mMaxIconCacheSize; |
| } |
| |
| /** Returns the size of the thumbnail cache. */ |
| public int getThumbnailCacheSize() { |
| return mMaxThumbnailCacheSize; |
| } |
| |
| /** Creates a new plan for loading the recent tasks. */ |
| public RecentsTaskLoadPlan createLoadPlan(Context context) { |
| RecentsConfiguration config = RecentsConfiguration.getInstance(); |
| RecentsTaskLoadPlan plan = new RecentsTaskLoadPlan(context, config, mSystemServicesProxy); |
| return plan; |
| } |
| |
| /** Preloads recents tasks using the specified plan to store the output. */ |
| public void preloadTasks(RecentsTaskLoadPlan plan, boolean isTopTaskHome) { |
| plan.preloadPlan(this, isTopTaskHome); |
| } |
| |
| /** Begins loading the heavy task data according to the specified options. */ |
| public void loadTasks(Context context, RecentsTaskLoadPlan plan, |
| RecentsTaskLoadPlan.Options opts) { |
| if (opts == null) { |
| throw new RuntimeException("Requires load options"); |
| } |
| plan.executePlan(opts, this, mLoadQueue); |
| if (!opts.onlyLoadForCache) { |
| mNumVisibleTasksLoaded = opts.numVisibleTasks; |
| mNumVisibleThumbnailsLoaded = opts.numVisibleTaskThumbnails; |
| |
| // Start the loader |
| mLoader.start(context); |
| } |
| } |
| |
| /** Acquires the task resource data directly from the pool. */ |
| public void loadTaskData(Task t) { |
| Drawable applicationIcon = mApplicationIconCache.getAndInvalidateIfModified(t.key); |
| Bitmap thumbnail = mThumbnailCache.getAndInvalidateIfModified(t.key); |
| |
| // Grab the thumbnail/icon from the cache, if either don't exist, then trigger a reload and |
| // use the default assets in their place until they load |
| boolean requiresLoad = (applicationIcon == null) || (thumbnail == null); |
| applicationIcon = applicationIcon != null ? applicationIcon : mDefaultApplicationIcon; |
| if (requiresLoad) { |
| mLoadQueue.addTask(t); |
| } |
| t.notifyTaskDataLoaded(thumbnail == mDefaultThumbnail ? null : thumbnail, applicationIcon); |
| } |
| |
| /** Releases the task resource data back into the pool. */ |
| public void unloadTaskData(Task t) { |
| mLoadQueue.removeTask(t); |
| t.notifyTaskDataUnloaded(null, mDefaultApplicationIcon); |
| } |
| |
| /** Completely removes the resource data from the pool. */ |
| public void deleteTaskData(Task t, boolean notifyTaskDataUnloaded) { |
| mLoadQueue.removeTask(t); |
| mThumbnailCache.remove(t.key); |
| mApplicationIconCache.remove(t.key); |
| if (notifyTaskDataUnloaded) { |
| t.notifyTaskDataUnloaded(null, mDefaultApplicationIcon); |
| } |
| } |
| |
| /** Stops the task loader and clears all pending tasks */ |
| void stopLoader() { |
| mLoader.stop(); |
| mLoadQueue.clearTasks(); |
| } |
| |
| /** Registers any broadcast receivers. */ |
| public void registerReceivers(Context context, RecentsPackageMonitor.PackageCallbacks cb) { |
| // Register the broadcast receiver to handle messages related to packages being added/removed |
| mPackageMonitor.register(context, cb); |
| } |
| |
| /** Unregisters any broadcast receivers. */ |
| public void unregisterReceivers() { |
| mPackageMonitor.unregister(); |
| } |
| |
| /** |
| * Handles signals from the system, trimming memory when requested to prevent us from running |
| * out of memory. |
| */ |
| public void onTrimMemory(int level) { |
| RecentsConfiguration config = RecentsConfiguration.getInstance(); |
| switch (level) { |
| case ComponentCallbacks2.TRIM_MEMORY_UI_HIDDEN: |
| // Stop the loader immediately when the UI is no longer visible |
| stopLoader(); |
| if (config.svelteLevel == RecentsConfiguration.SVELTE_NONE) { |
| mThumbnailCache.trimToSize(Math.max(mNumVisibleTasksLoaded, |
| mMaxThumbnailCacheSize / 2)); |
| } else if (config.svelteLevel == RecentsConfiguration.SVELTE_LIMIT_CACHE) { |
| mThumbnailCache.trimToSize(mNumVisibleThumbnailsLoaded); |
| } else if (config.svelteLevel >= RecentsConfiguration.SVELTE_DISABLE_CACHE) { |
| mThumbnailCache.evictAll(); |
| } |
| mApplicationIconCache.trimToSize(Math.max(mNumVisibleTasksLoaded, |
| mMaxIconCacheSize / 2)); |
| break; |
| case ComponentCallbacks2.TRIM_MEMORY_RUNNING_MODERATE: |
| case ComponentCallbacks2.TRIM_MEMORY_BACKGROUND: |
| // We are leaving recents, so trim the data a bit |
| mThumbnailCache.trimToSize(Math.max(1, mMaxThumbnailCacheSize / 2)); |
| mApplicationIconCache.trimToSize(Math.max(1, mMaxIconCacheSize / 2)); |
| break; |
| case ComponentCallbacks2.TRIM_MEMORY_RUNNING_LOW: |
| case ComponentCallbacks2.TRIM_MEMORY_MODERATE: |
| // We are going to be low on memory |
| mThumbnailCache.trimToSize(Math.max(1, mMaxThumbnailCacheSize / 4)); |
| mApplicationIconCache.trimToSize(Math.max(1, mMaxIconCacheSize / 4)); |
| break; |
| case ComponentCallbacks2.TRIM_MEMORY_RUNNING_CRITICAL: |
| case ComponentCallbacks2.TRIM_MEMORY_COMPLETE: |
| // We are low on memory, so release everything |
| mThumbnailCache.evictAll(); |
| mApplicationIconCache.evictAll(); |
| // The cache is small, only clear the label cache when we are critical |
| mActivityLabelCache.evictAll(); |
| break; |
| default: |
| break; |
| } |
| } |
| } |