| /* |
| * Copyright (C) 2011 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.recent; |
| |
| import android.app.ActivityManager; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.ActivityInfo; |
| import android.content.pm.PackageManager; |
| import android.content.pm.ResolveInfo; |
| import android.content.res.Resources; |
| import android.graphics.Bitmap; |
| import android.graphics.drawable.BitmapDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.os.AsyncTask; |
| import android.os.Handler; |
| import android.os.Process; |
| import android.os.UserHandle; |
| import android.util.Log; |
| import android.view.MotionEvent; |
| import android.view.View; |
| |
| import com.android.systemui.R; |
| import com.android.systemui.statusbar.phone.PhoneStatusBar; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.LinkedBlockingQueue; |
| |
| public class RecentTasksLoader implements View.OnTouchListener { |
| static final String TAG = "RecentTasksLoader"; |
| static final boolean DEBUG = PhoneStatusBar.DEBUG || false; |
| |
| private static final int DISPLAY_TASKS = 20; |
| private static final int MAX_TASKS = DISPLAY_TASKS + 1; // allow extra for non-apps |
| |
| private Context mContext; |
| private RecentsPanelView mRecentsPanel; |
| |
| private Object mFirstTaskLock = new Object(); |
| private TaskDescription mFirstTask; |
| private boolean mFirstTaskLoaded; |
| |
| private AsyncTask<Void, ArrayList<TaskDescription>, Void> mTaskLoader; |
| private AsyncTask<Void, TaskDescription, Void> mThumbnailLoader; |
| private Handler mHandler; |
| |
| private int mIconDpi; |
| private ColorDrawableWithDimensions mDefaultThumbnailBackground; |
| private ColorDrawableWithDimensions mDefaultIconBackground; |
| private int mNumTasksInFirstScreenful = Integer.MAX_VALUE; |
| |
| private boolean mFirstScreenful; |
| private ArrayList<TaskDescription> mLoadedTasks; |
| |
| private enum State { LOADING, LOADED, CANCELLED }; |
| private State mState = State.CANCELLED; |
| |
| |
| private static RecentTasksLoader sInstance; |
| public static RecentTasksLoader getInstance(Context context) { |
| if (sInstance == null) { |
| sInstance = new RecentTasksLoader(context); |
| } |
| return sInstance; |
| } |
| |
| private RecentTasksLoader(Context context) { |
| mContext = context; |
| mHandler = new Handler(); |
| |
| final Resources res = context.getResources(); |
| |
| // get the icon size we want -- on tablets, we use bigger icons |
| boolean isTablet = res.getBoolean(R.bool.config_recents_interface_for_tablets); |
| if (isTablet) { |
| ActivityManager activityManager = |
| (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); |
| mIconDpi = activityManager.getLauncherLargeIconDensity(); |
| } else { |
| mIconDpi = res.getDisplayMetrics().densityDpi; |
| } |
| |
| // Render default icon (just a blank image) |
| int defaultIconSize = res.getDimensionPixelSize(com.android.internal.R.dimen.app_icon_size); |
| int iconSize = (int) (defaultIconSize * mIconDpi / res.getDisplayMetrics().densityDpi); |
| mDefaultIconBackground = new ColorDrawableWithDimensions(0x00000000, iconSize, iconSize); |
| |
| // Render the default thumbnail background |
| int thumbnailWidth = |
| (int) res.getDimensionPixelSize(com.android.internal.R.dimen.thumbnail_width); |
| int thumbnailHeight = |
| (int) res.getDimensionPixelSize(com.android.internal.R.dimen.thumbnail_height); |
| int color = res.getColor(R.drawable.status_bar_recents_app_thumbnail_background); |
| |
| mDefaultThumbnailBackground = |
| new ColorDrawableWithDimensions(color, thumbnailWidth, thumbnailHeight); |
| } |
| |
| public void setRecentsPanel(RecentsPanelView newRecentsPanel, RecentsPanelView caller) { |
| // Only allow clearing mRecentsPanel if the caller is the current recentsPanel |
| if (newRecentsPanel != null || mRecentsPanel == caller) { |
| mRecentsPanel = newRecentsPanel; |
| if (mRecentsPanel != null) { |
| mNumTasksInFirstScreenful = mRecentsPanel.numItemsInOneScreenful(); |
| } |
| } |
| } |
| |
| public Drawable getDefaultThumbnail() { |
| return mDefaultThumbnailBackground; |
| } |
| |
| public Drawable getDefaultIcon() { |
| return mDefaultIconBackground; |
| } |
| |
| public ArrayList<TaskDescription> getLoadedTasks() { |
| return mLoadedTasks; |
| } |
| |
| public void remove(TaskDescription td) { |
| mLoadedTasks.remove(td); |
| } |
| |
| public boolean isFirstScreenful() { |
| return mFirstScreenful; |
| } |
| |
| private boolean isCurrentHomeActivity(ComponentName component, ActivityInfo homeInfo) { |
| if (homeInfo == null) { |
| final PackageManager pm = mContext.getPackageManager(); |
| homeInfo = new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME) |
| .resolveActivityInfo(pm, 0); |
| } |
| return homeInfo != null |
| && homeInfo.packageName.equals(component.getPackageName()) |
| && homeInfo.name.equals(component.getClassName()); |
| } |
| |
| // Create an TaskDescription, returning null if the title or icon is null |
| TaskDescription createTaskDescription(int taskId, int persistentTaskId, Intent baseIntent, |
| ComponentName origActivity, CharSequence description) { |
| Intent intent = new Intent(baseIntent); |
| if (origActivity != null) { |
| intent.setComponent(origActivity); |
| } |
| final PackageManager pm = mContext.getPackageManager(); |
| intent.setFlags((intent.getFlags()&~Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) |
| | Intent.FLAG_ACTIVITY_NEW_TASK); |
| final ResolveInfo resolveInfo = pm.resolveActivity(intent, 0); |
| if (resolveInfo != null) { |
| final ActivityInfo info = resolveInfo.activityInfo; |
| final String title = info.loadLabel(pm).toString(); |
| |
| if (title != null && title.length() > 0) { |
| if (DEBUG) Log.v(TAG, "creating activity desc for id=" |
| + persistentTaskId + ", label=" + title); |
| |
| TaskDescription item = new TaskDescription(taskId, |
| persistentTaskId, resolveInfo, baseIntent, info.packageName, |
| description); |
| item.setLabel(title); |
| |
| return item; |
| } else { |
| if (DEBUG) Log.v(TAG, "SKIPPING item " + persistentTaskId); |
| } |
| } |
| return null; |
| } |
| |
| void loadThumbnailAndIcon(TaskDescription td) { |
| final ActivityManager am = (ActivityManager) |
| mContext.getSystemService(Context.ACTIVITY_SERVICE); |
| final PackageManager pm = mContext.getPackageManager(); |
| Bitmap thumbnail = am.getTaskTopThumbnail(td.persistentTaskId); |
| Drawable icon = getFullResIcon(td.resolveInfo, pm); |
| |
| if (DEBUG) Log.v(TAG, "Loaded bitmap for task " |
| + td + ": " + thumbnail); |
| synchronized (td) { |
| if (thumbnail != null) { |
| td.setThumbnail(new BitmapDrawable(mContext.getResources(), thumbnail)); |
| } else { |
| td.setThumbnail(mDefaultThumbnailBackground); |
| } |
| if (icon != null) { |
| td.setIcon(icon); |
| } |
| td.setLoaded(true); |
| } |
| } |
| |
| Drawable getFullResDefaultActivityIcon() { |
| return getFullResIcon(Resources.getSystem(), |
| com.android.internal.R.mipmap.sym_def_app_icon); |
| } |
| |
| Drawable getFullResIcon(Resources resources, int iconId) { |
| try { |
| return resources.getDrawableForDensity(iconId, mIconDpi); |
| } catch (Resources.NotFoundException e) { |
| return getFullResDefaultActivityIcon(); |
| } |
| } |
| |
| private Drawable getFullResIcon(ResolveInfo info, PackageManager packageManager) { |
| Resources resources; |
| try { |
| resources = packageManager.getResourcesForApplication( |
| info.activityInfo.applicationInfo); |
| } catch (PackageManager.NameNotFoundException e) { |
| resources = null; |
| } |
| if (resources != null) { |
| int iconId = info.activityInfo.getIconResource(); |
| if (iconId != 0) { |
| return getFullResIcon(resources, iconId); |
| } |
| } |
| return getFullResDefaultActivityIcon(); |
| } |
| |
| Runnable mPreloadTasksRunnable = new Runnable() { |
| public void run() { |
| loadTasksInBackground(); |
| } |
| }; |
| |
| // additional optimization when we have software system buttons - start loading the recent |
| // tasks on touch down |
| @Override |
| public boolean onTouch(View v, MotionEvent ev) { |
| int action = ev.getAction() & MotionEvent.ACTION_MASK; |
| if (action == MotionEvent.ACTION_DOWN) { |
| preloadRecentTasksList(); |
| } else if (action == MotionEvent.ACTION_CANCEL) { |
| cancelPreloadingRecentTasksList(); |
| } else if (action == MotionEvent.ACTION_UP) { |
| // Remove the preloader if we haven't called it yet |
| mHandler.removeCallbacks(mPreloadTasksRunnable); |
| if (!v.isPressed()) { |
| cancelLoadingThumbnailsAndIcons(); |
| } |
| |
| } |
| return false; |
| } |
| |
| public void preloadRecentTasksList() { |
| mHandler.post(mPreloadTasksRunnable); |
| } |
| |
| public void cancelPreloadingRecentTasksList() { |
| cancelLoadingThumbnailsAndIcons(); |
| mHandler.removeCallbacks(mPreloadTasksRunnable); |
| } |
| |
| public void cancelLoadingThumbnailsAndIcons(RecentsPanelView caller) { |
| // Only oblige this request if it comes from the current RecentsPanel |
| // (eg when you rotate, the old RecentsPanel request should be ignored) |
| if (mRecentsPanel == caller) { |
| cancelLoadingThumbnailsAndIcons(); |
| } |
| } |
| |
| |
| private void cancelLoadingThumbnailsAndIcons() { |
| if (mRecentsPanel != null && mRecentsPanel.isShowing()) { |
| return; |
| } |
| |
| if (mTaskLoader != null) { |
| mTaskLoader.cancel(false); |
| mTaskLoader = null; |
| } |
| if (mThumbnailLoader != null) { |
| mThumbnailLoader.cancel(false); |
| mThumbnailLoader = null; |
| } |
| mLoadedTasks = null; |
| if (mRecentsPanel != null) { |
| mRecentsPanel.onTaskLoadingCancelled(); |
| } |
| mFirstScreenful = false; |
| mState = State.CANCELLED; |
| } |
| |
| private void clearFirstTask() { |
| synchronized (mFirstTaskLock) { |
| mFirstTask = null; |
| mFirstTaskLoaded = false; |
| } |
| } |
| |
| public void preloadFirstTask() { |
| Thread bgLoad = new Thread() { |
| public void run() { |
| TaskDescription first = loadFirstTask(); |
| synchronized(mFirstTaskLock) { |
| if (mCancelPreloadingFirstTask) { |
| clearFirstTask(); |
| } else { |
| mFirstTask = first; |
| mFirstTaskLoaded = true; |
| } |
| mPreloadingFirstTask = false; |
| } |
| } |
| }; |
| synchronized(mFirstTaskLock) { |
| if (!mPreloadingFirstTask) { |
| clearFirstTask(); |
| mPreloadingFirstTask = true; |
| bgLoad.start(); |
| } |
| } |
| } |
| |
| public void cancelPreloadingFirstTask() { |
| synchronized(mFirstTaskLock) { |
| if (mPreloadingFirstTask) { |
| mCancelPreloadingFirstTask = true; |
| } else { |
| clearFirstTask(); |
| } |
| } |
| } |
| |
| boolean mPreloadingFirstTask; |
| boolean mCancelPreloadingFirstTask; |
| public TaskDescription getFirstTask() { |
| while(true) { |
| synchronized(mFirstTaskLock) { |
| if (mFirstTaskLoaded) { |
| return mFirstTask; |
| } else if (!mFirstTaskLoaded && !mPreloadingFirstTask) { |
| mFirstTask = loadFirstTask(); |
| mFirstTaskLoaded = true; |
| return mFirstTask; |
| } |
| } |
| try { |
| Thread.sleep(3); |
| } catch (InterruptedException e) { |
| } |
| } |
| } |
| |
| public TaskDescription loadFirstTask() { |
| final ActivityManager am = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE); |
| |
| final List<ActivityManager.RecentTaskInfo> recentTasks = am.getRecentTasksForUser(1, |
| ActivityManager.RECENT_IGNORE_UNAVAILABLE | ActivityManager.RECENT_INCLUDE_RELATED, |
| UserHandle.CURRENT.getIdentifier()); |
| TaskDescription item = null; |
| if (recentTasks.size() > 0) { |
| ActivityManager.RecentTaskInfo recentInfo = recentTasks.get(0); |
| |
| Intent intent = new Intent(recentInfo.baseIntent); |
| if (recentInfo.origActivity != null) { |
| intent.setComponent(recentInfo.origActivity); |
| } |
| |
| // Don't load the current home activity. |
| if (isCurrentHomeActivity(intent.getComponent(), null)) { |
| return null; |
| } |
| |
| // Don't load ourselves |
| if (intent.getComponent().getPackageName().equals(mContext.getPackageName())) { |
| return null; |
| } |
| |
| item = createTaskDescription(recentInfo.id, |
| recentInfo.persistentId, recentInfo.baseIntent, |
| recentInfo.origActivity, recentInfo.description); |
| if (item != null) { |
| loadThumbnailAndIcon(item); |
| } |
| return item; |
| } |
| return null; |
| } |
| |
| public void loadTasksInBackground() { |
| loadTasksInBackground(false); |
| } |
| public void loadTasksInBackground(final boolean zeroeth) { |
| if (mState != State.CANCELLED) { |
| return; |
| } |
| mState = State.LOADING; |
| mFirstScreenful = true; |
| |
| final LinkedBlockingQueue<TaskDescription> tasksWaitingForThumbnails = |
| new LinkedBlockingQueue<TaskDescription>(); |
| mTaskLoader = new AsyncTask<Void, ArrayList<TaskDescription>, Void>() { |
| @Override |
| protected void onProgressUpdate(ArrayList<TaskDescription>... values) { |
| if (!isCancelled()) { |
| ArrayList<TaskDescription> newTasks = values[0]; |
| // do a callback to RecentsPanelView to let it know we have more values |
| // how do we let it know we're all done? just always call back twice |
| if (mRecentsPanel != null) { |
| mRecentsPanel.onTasksLoaded(newTasks, mFirstScreenful); |
| } |
| if (mLoadedTasks == null) { |
| mLoadedTasks = new ArrayList<TaskDescription>(); |
| } |
| mLoadedTasks.addAll(newTasks); |
| mFirstScreenful = false; |
| } |
| } |
| @Override |
| protected Void doInBackground(Void... params) { |
| // We load in two stages: first, we update progress with just the first screenful |
| // of items. Then, we update with the rest of the items |
| final int origPri = Process.getThreadPriority(Process.myTid()); |
| Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); |
| final PackageManager pm = mContext.getPackageManager(); |
| final ActivityManager am = (ActivityManager) |
| mContext.getSystemService(Context.ACTIVITY_SERVICE); |
| |
| final List<ActivityManager.RecentTaskInfo> recentTasks = |
| am.getRecentTasks(MAX_TASKS, ActivityManager.RECENT_IGNORE_UNAVAILABLE |
| | ActivityManager.RECENT_INCLUDE_RELATED); |
| int numTasks = recentTasks.size(); |
| ActivityInfo homeInfo = new Intent(Intent.ACTION_MAIN) |
| .addCategory(Intent.CATEGORY_HOME).resolveActivityInfo(pm, 0); |
| |
| boolean firstScreenful = true; |
| ArrayList<TaskDescription> tasks = new ArrayList<TaskDescription>(); |
| |
| // skip the first task - assume it's either the home screen or the current activity. |
| final int first = 0; |
| for (int i = first, index = 0; i < numTasks && (index < MAX_TASKS); ++i) { |
| if (isCancelled()) { |
| break; |
| } |
| final ActivityManager.RecentTaskInfo recentInfo = recentTasks.get(i); |
| |
| Intent intent = new Intent(recentInfo.baseIntent); |
| if (recentInfo.origActivity != null) { |
| intent.setComponent(recentInfo.origActivity); |
| } |
| |
| // Don't load the current home activity. |
| if (isCurrentHomeActivity(intent.getComponent(), homeInfo)) { |
| continue; |
| } |
| |
| // Don't load ourselves |
| if (intent.getComponent().getPackageName().equals(mContext.getPackageName())) { |
| continue; |
| } |
| |
| TaskDescription item = createTaskDescription(recentInfo.id, |
| recentInfo.persistentId, recentInfo.baseIntent, |
| recentInfo.origActivity, recentInfo.description); |
| |
| if (item != null) { |
| while (true) { |
| try { |
| tasksWaitingForThumbnails.put(item); |
| break; |
| } catch (InterruptedException e) { |
| } |
| } |
| tasks.add(item); |
| if (firstScreenful && tasks.size() == mNumTasksInFirstScreenful) { |
| publishProgress(tasks); |
| tasks = new ArrayList<TaskDescription>(); |
| firstScreenful = false; |
| //break; |
| } |
| ++index; |
| } |
| } |
| |
| if (!isCancelled()) { |
| publishProgress(tasks); |
| if (firstScreenful) { |
| // always should publish two updates |
| publishProgress(new ArrayList<TaskDescription>()); |
| } |
| } |
| |
| while (true) { |
| try { |
| tasksWaitingForThumbnails.put(new TaskDescription()); |
| break; |
| } catch (InterruptedException e) { |
| } |
| } |
| |
| Process.setThreadPriority(origPri); |
| return null; |
| } |
| }; |
| mTaskLoader.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); |
| loadThumbnailsAndIconsInBackground(tasksWaitingForThumbnails); |
| } |
| |
| private void loadThumbnailsAndIconsInBackground( |
| final BlockingQueue<TaskDescription> tasksWaitingForThumbnails) { |
| // continually read items from tasksWaitingForThumbnails and load |
| // thumbnails and icons for them. finish thread when cancelled or there |
| // is a null item in tasksWaitingForThumbnails |
| mThumbnailLoader = new AsyncTask<Void, TaskDescription, Void>() { |
| @Override |
| protected void onProgressUpdate(TaskDescription... values) { |
| if (!isCancelled()) { |
| TaskDescription td = values[0]; |
| if (td.isNull()) { // end sentinel |
| mState = State.LOADED; |
| } else { |
| if (mRecentsPanel != null) { |
| mRecentsPanel.onTaskThumbnailLoaded(td); |
| } |
| } |
| } |
| } |
| @Override |
| protected Void doInBackground(Void... params) { |
| final int origPri = Process.getThreadPriority(Process.myTid()); |
| Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); |
| |
| while (true) { |
| if (isCancelled()) { |
| break; |
| } |
| TaskDescription td = null; |
| while (td == null) { |
| try { |
| td = tasksWaitingForThumbnails.take(); |
| } catch (InterruptedException e) { |
| } |
| } |
| if (td.isNull()) { // end sentinel |
| publishProgress(td); |
| break; |
| } |
| loadThumbnailAndIcon(td); |
| |
| publishProgress(td); |
| } |
| |
| Process.setThreadPriority(origPri); |
| return null; |
| } |
| }; |
| mThumbnailLoader.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); |
| } |
| } |