FileDocCategorySizeDatePackage
RecentsView.javaAPI DocAndroid 5.1 API24009Thu Mar 12 22:22:42 GMT 2015com.android.systemui.recents.views

RecentsView

public class RecentsView extends android.widget.FrameLayout implements RecentsPackageMonitor.PackageCallbacks, TaskStackView.TaskStackViewCallbacks
This view is the the top level layout that contains TaskStacks (which are laid out according to their SpaceNode bounds.

Fields Summary
com.android.systemui.recents.RecentsConfiguration
mConfig
android.view.LayoutInflater
mInflater
DebugOverlayView
mDebugOverlay
ArrayList
mStacks
android.view.View
mSearchBar
RecentsViewCallbacks
mCb
Constructors Summary
public RecentsView(android.content.Context context)

        super(context);
public RecentsView(android.content.Context context, android.util.AttributeSet attrs)

        this(context, attrs, 0);
public RecentsView(android.content.Context context, android.util.AttributeSet attrs, int defStyleAttr)

        this(context, attrs, defStyleAttr, 0);
public RecentsView(android.content.Context context, android.util.AttributeSet attrs, int defStyleAttr, int defStyleRes)

        super(context, attrs, defStyleAttr, defStyleRes);
        mConfig = RecentsConfiguration.getInstance();
        mInflater = LayoutInflater.from(context);
Methods Summary
public voiddismissFocusedTask()
Dismisses the focused task.

        // Get the first stack view
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                TaskStackView stackView = (TaskStackView) child;
                stackView.dismissFocusedTask();
                break;
            }
        }
public voidfocusNextTask(boolean forward)
Focuses the next task in the first stack view

        // Get the first stack view
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                TaskStackView stackView = (TaskStackView) child;
                stackView.focusNextTask(forward, true);
                break;
            }
        }
public booleanhasSearchBar()
Returns whether there is currently a search bar

        return mSearchBar != null;
public booleanlaunchFocusedTask()
Launches the focused task from the first stack if possible

        // Get the first stack view
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                TaskStackView stackView = (TaskStackView) child;
                TaskStack stack = stackView.mStack;
                // Iterate the stack views and try and find the focused task
                int taskCount = stackView.getChildCount();
                for (int j = 0; j < taskCount; j++) {
                    TaskView tv = (TaskView) stackView.getChildAt(j);
                    Task task = tv.getTask();
                    if (tv.isFocusedTask()) {
                        onTaskViewClicked(stackView, tv, stack, task, false);
                        return true;
                    }
                }
            }
        }
        return false;
public booleanlaunchPreviousTask()
Launches the task that Recents was launched from, if possible

        // Get the first stack view
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                TaskStackView stackView = (TaskStackView) child;
                TaskStack stack = stackView.mStack;
                ArrayList<Task> tasks = stack.getTasks();

                // Find the launch task in the stack
                if (!tasks.isEmpty()) {
                    int taskCount = tasks.size();
                    for (int j = 0; j < taskCount; j++) {
                        if (tasks.get(j).isLaunchTarget) {
                            Task task = tasks.get(j);
                            TaskView tv = stackView.getChildViewForTask(task);
                            onTaskViewClicked(stackView, tv, stack, task, false);
                            return true;
                        }
                    }
                }
            }
        }
        return false;
public voidonAllTaskViewsDismissed()

        mCb.onAllTaskViewsDismissed();
public android.view.WindowInsetsonApplyWindowInsets(android.view.WindowInsets insets)

        // Update the configuration with the latest system insets and trigger a relayout
        mConfig.updateSystemInsets(insets.getSystemWindowInsets());
        requestLayout();
        return insets.consumeSystemWindowInsets();
protected voidonLayout(boolean changed, int left, int top, int right, int bottom)
This is called with the full size of the window since we are handling our own insets.

        // Get the search bar bounds so that we lay it out
        if (mSearchBar != null) {
            Rect searchBarSpaceBounds = new Rect();
            mConfig.getSearchBarBounds(getMeasuredWidth(), getMeasuredHeight(),
                    mConfig.systemInsets.top, searchBarSpaceBounds);
            mSearchBar.layout(searchBarSpaceBounds.left, searchBarSpaceBounds.top,
                    searchBarSpaceBounds.right, searchBarSpaceBounds.bottom);
        }

        // Layout each TaskStackView with the full width and height of the window since the 
        // transition view is a child of that stack view
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar && child.getVisibility() != GONE) {
                child.layout(left, top, left + child.getMeasuredWidth(),
                        top + child.getMeasuredHeight());
            }
        }
protected voidonMeasure(int widthMeasureSpec, int heightMeasureSpec)
This is called with the full size of the window since we are handling our own insets.

        int width = MeasureSpec.getSize(widthMeasureSpec);
        int height = MeasureSpec.getSize(heightMeasureSpec);

        // Get the search bar bounds and measure the search bar layout
        if (mSearchBar != null) {
            Rect searchBarSpaceBounds = new Rect();
            mConfig.getSearchBarBounds(width, height, mConfig.systemInsets.top, searchBarSpaceBounds);
            mSearchBar.measure(
                    MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.width(), MeasureSpec.EXACTLY),
                    MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.height(), MeasureSpec.EXACTLY));
        }

        Rect taskStackBounds = new Rect();
        mConfig.getTaskStackBounds(width, height, mConfig.systemInsets.top,
                mConfig.systemInsets.right, taskStackBounds);

        // Measure each TaskStackView with the full width and height of the window since the 
        // transition view is a child of that stack view
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar && child.getVisibility() != GONE) {
                TaskStackView tsv = (TaskStackView) child;
                // Set the insets to be the top/left inset + search bounds
                tsv.setStackInsetRect(taskStackBounds);
                tsv.measure(widthMeasureSpec, heightMeasureSpec);
            }
        }

        setMeasuredDimension(width, height);
public voidonPackagesChanged(com.android.systemui.recents.model.RecentsPackageMonitor monitor, java.lang.String packageName, int userId)
RecentsPackageMonitor.PackageCallbacks Implementation

        // Propagate this event down to each task stack view
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                TaskStackView stackView = (TaskStackView) child;
                stackView.onPackagesChanged(monitor, packageName, userId);
            }
        }
public voidonRecentsHidden()
Final callback after Recents is finally hidden.

        // Notify each task stack view
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                TaskStackView stackView = (TaskStackView) child;
                stackView.onRecentsHidden();
            }
        }
public voidonTaskStackFilterTriggered()

        // Hide the search bar
        if (mSearchBar != null) {
            mSearchBar.animate()
                    .alpha(0f)
                    .setStartDelay(0)
                    .setInterpolator(mConfig.fastOutSlowInInterpolator)
                    .setDuration(mConfig.filteringCurrentViewsAnimDuration)
                    .withLayer()
                    .start();
        }
public voidonTaskStackUnfilterTriggered()

        // Show the search bar
        if (mSearchBar != null) {
            mSearchBar.animate()
                    .alpha(1f)
                    .setStartDelay(0)
                    .setInterpolator(mConfig.fastOutSlowInInterpolator)
                    .setDuration(mConfig.filteringNewViewsAnimDuration)
                    .withLayer()
                    .start();
        }
public voidonTaskViewAppInfoClicked(com.android.systemui.recents.model.Task t)

        // Create a new task stack with the application info details activity
        Intent baseIntent = t.key.baseIntent;
        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
                Uri.fromParts("package", baseIntent.getComponent().getPackageName(), null));
        intent.setComponent(intent.resolveActivity(getContext().getPackageManager()));
        TaskStackBuilder.create(getContext())
                .addNextIntentWithParentStack(intent).startActivities(null,
                new UserHandle(t.key.userId));
public voidonTaskViewClicked(TaskStackView stackView, TaskView tv, com.android.systemui.recents.model.TaskStack stack, com.android.systemui.recents.model.Task task, boolean lockToTask)
TaskStackView.TaskStackCallbacks Implementation

        // Notify any callbacks of the launching of a new task
        if (mCb != null) {
            mCb.onTaskViewClicked();
        }

        // Upfront the processing of the thumbnail
        TaskViewTransform transform = new TaskViewTransform();
        View sourceView;
        int offsetX = 0;
        int offsetY = 0;
        float stackScroll = stackView.getScroller().getStackScroll();
        if (tv == null) {
            // If there is no actual task view, then use the stack view as the source view
            // and then offset to the expected transform rect, but bound this to just
            // outside the display rect (to ensure we don't animate from too far away)
            sourceView = stackView;
            transform = stackView.getStackAlgorithm().getStackTransform(task, stackScroll, transform, null);
            offsetX = transform.rect.left;
            offsetY = mConfig.displayRect.height();
        } else {
            sourceView = tv.mThumbnailView;
            transform = stackView.getStackAlgorithm().getStackTransform(task, stackScroll, transform, null);
        }

        // Compute the thumbnail to scale up from
        final SystemServicesProxy ssp =
                RecentsTaskLoader.getInstance().getSystemServicesProxy();
        ActivityOptions opts = null;
        if (task.thumbnail != null && task.thumbnail.getWidth() > 0 &&
                task.thumbnail.getHeight() > 0) {
            Bitmap b;
            if (tv != null) {
                // Disable any focused state before we draw the header
                if (tv.isFocusedTask()) {
                    tv.unsetFocusedTask();
                }

                float scale = tv.getScaleX();
                int fromHeaderWidth = (int) (tv.mHeaderView.getMeasuredWidth() * scale);
                int fromHeaderHeight = (int) (tv.mHeaderView.getMeasuredHeight() * scale);
                b = Bitmap.createBitmap(fromHeaderWidth, fromHeaderHeight,
                        Bitmap.Config.ARGB_8888);
                if (Constants.DebugFlags.App.EnableTransitionThumbnailDebugMode) {
                    b.eraseColor(0xFFff0000);
                } else {
                    Canvas c = new Canvas(b);
                    c.scale(tv.getScaleX(), tv.getScaleY());
                    tv.mHeaderView.draw(c);
                    c.setBitmap(null);
                }
            } else {
                // Notify the system to skip the thumbnail layer by using an ALPHA_8 bitmap
                b = Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8);
            }
            ActivityOptions.OnAnimationStartedListener animStartedListener = null;
            if (lockToTask) {
                animStartedListener = new ActivityOptions.OnAnimationStartedListener() {
                    boolean mTriggered = false;
                    @Override
                    public void onAnimationStarted() {
                        if (!mTriggered) {
                            postDelayed(new Runnable() {
                                @Override
                                public void run() {
                                    mCb.onScreenPinningRequest();
                                }
                            }, 350);
                            mTriggered = true;
                        }
                    }
                };
            }
            opts = ActivityOptions.makeThumbnailAspectScaleUpAnimation(sourceView,
                    b, offsetX, offsetY, transform.rect.width(), transform.rect.height(),
                    sourceView.getHandler(), animStartedListener);
        }

        final ActivityOptions launchOpts = opts;
        final Runnable launchRunnable = new Runnable() {
            @Override
            public void run() {
                if (task.isActive) {
                    // Bring an active task to the foreground
                    ssp.moveTaskToFront(task.key.id, launchOpts);
                } else {
                    if (ssp.startActivityFromRecents(getContext(), task.key.id,
                            task.activityLabel, launchOpts)) {
                        if (launchOpts == null && lockToTask) {
                            mCb.onScreenPinningRequest();
                        }
                    } else {
                        // Dismiss the task and return the user to home if we fail to
                        // launch the task
                        onTaskViewDismissed(task);
                        if (mCb != null) {
                            mCb.onTaskLaunchFailed();
                        }
                    }
                }
            }
        };

        // Launch the app right away if there is no task view, otherwise, animate the icon out first
        if (tv == null) {
            launchRunnable.run();
        } else {
            if (!task.group.isFrontMostTask(task)) {
                // For affiliated tasks that are behind other tasks, we must animate the front cards
                // out of view before starting the task transition
                stackView.startLaunchTaskAnimation(tv, launchRunnable, lockToTask);
            } else {
                // Otherwise, we can start the task transition immediately
                stackView.startLaunchTaskAnimation(tv, null, lockToTask);
                launchRunnable.run();
            }
        }
public voidonTaskViewDismissed(com.android.systemui.recents.model.Task t)

        // Remove any stored data from the loader.  We currently don't bother notifying the views
        // that the data has been unloaded because at the point we call onTaskViewDismissed(), the views
        // either don't need to be updated, or have already been removed.
        RecentsTaskLoader loader = RecentsTaskLoader.getInstance();
        loader.deleteTaskData(t, false);

        // Remove the old task from activity manager
        loader.getSystemServicesProxy().removeTask(t.key.id);
public voidonUserInteraction()
Notifies each task view of the user interaction.

        // Get the first stack view
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                TaskStackView stackView = (TaskStackView) child;
                stackView.onUserInteraction();
            }
        }
public voidsetCallbacks(com.android.systemui.recents.views.RecentsView$RecentsViewCallbacks cb)
Sets the callbacks

        mCb = cb;
public voidsetDebugOverlay(DebugOverlayView overlay)
Sets the debug overlay

        mDebugOverlay = overlay;
public voidsetSearchBar(android.view.View searchBar)
Adds the search bar

        // Create the search bar (and hide it if we have no recent tasks)
        if (Constants.DebugFlags.App.EnableSearchLayout) {
            // Remove the previous search bar if one exists
            if (mSearchBar != null && indexOfChild(mSearchBar) > -1) {
                removeView(mSearchBar);
            }
            // Add the new search bar
            if (searchBar != null) {
                mSearchBar = searchBar;
                addView(mSearchBar);
            }
        }
public voidsetSearchBarVisibility(int visibility)
Sets the visibility of the search bar

        if (mSearchBar != null) {
            mSearchBar.setVisibility(visibility);
            // Always bring the search bar to the top
            mSearchBar.bringToFront();
        }
public voidsetTaskStacks(java.util.ArrayList stacks)
Set/get the bsp root node

        int numStacks = stacks.size();

        // Make a list of the stack view children only
        ArrayList<TaskStackView> stackViews = new ArrayList<TaskStackView>();
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                stackViews.add((TaskStackView) child);
            }
        }

        // Remove all/extra stack views
        int numTaskStacksToKeep = 0; // Keep no tasks if we are recreating the layout
        if (mConfig.launchedReuseTaskStackViews) {
            numTaskStacksToKeep = Math.min(childCount, numStacks);
        }
        for (int i = stackViews.size() - 1; i >= numTaskStacksToKeep; i--) {
            removeView(stackViews.get(i));
            stackViews.remove(i);
        }

        // Update the stack views that we are keeping
        for (int i = 0; i < numTaskStacksToKeep; i++) {
            TaskStackView tsv = stackViews.get(i);
            // If onRecentsHidden is not triggered, we need to the stack view again here
            tsv.reset();
            tsv.setStack(stacks.get(i));
        }

        // Add remaining/recreate stack views
        mStacks = stacks;
        for (int i = stackViews.size(); i < numStacks; i++) {
            TaskStack stack = stacks.get(i);
            TaskStackView stackView = new TaskStackView(getContext(), stack);
            stackView.setCallbacks(this);
            addView(stackView);
        }

        // Enable debug mode drawing on all the stacks if necessary
        if (mConfig.debugModeEnabled) {
            for (int i = childCount - 1; i >= 0; i--) {
                View v = getChildAt(i);
                if (v != mSearchBar) {
                    TaskStackView stackView = (TaskStackView) v;
                    stackView.setDebugOverlay(mDebugOverlay);
                }
            }
        }

        // Trigger a new layout
        requestLayout();
public voidstartEnterRecentsAnimation(ViewAnimation.TaskViewEnterContext ctx)
Requests all task stacks to start their enter-recents animation

        // We have to increment/decrement the post animation trigger in case there are no children
        // to ensure that it runs
        ctx.postAnimationTrigger.increment();

        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                TaskStackView stackView = (TaskStackView) child;
                stackView.startEnterRecentsAnimation(ctx);
            }
        }
        ctx.postAnimationTrigger.decrement();
public voidstartExitToHomeAnimation(ViewAnimation.TaskViewExitContext ctx)
Requests all task stacks to start their exit-recents animation

        // We have to increment/decrement the post animation trigger in case there are no children
        // to ensure that it runs
        ctx.postAnimationTrigger.increment();
        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            if (child != mSearchBar) {
                TaskStackView stackView = (TaskStackView) child;
                stackView.startExitToHomeAnimation(ctx);
            }
        }
        ctx.postAnimationTrigger.decrement();

        // Notify of the exit animation
        mCb.onExitToHomeAnimationTriggered();
public booleanunfilterFilteredStacks()
Unfilters any filtered stacks

        if (mStacks != null) {
            // Check if there are any filtered stacks and unfilter them before we back out of Recents
            boolean stacksUnfiltered = false;
            int numStacks = mStacks.size();
            for (int i = 0; i < numStacks; i++) {
                TaskStack stack = mStacks.get(i);
                if (stack.hasFilteredTasks()) {
                    stack.unfilterTasks();
                    stacksUnfiltered = true;
                }
            }
            return stacksUnfiltered;
        }
        return false;