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Commit 4ab4d838 authored by Winson Chung's avatar Winson Chung
Browse files

Saving the stack state when you rotate. 

- Saving the focus and stack scroll, along with
  the history visibility on configuration change.

Change-Id: I788fa06de9af8f7769de26442c804e27daa7e627
parent 9a74290a

packages/SystemUI/src/com/android/systemui/recents/RecentsActivity.java

+22 −0
Original line number Diff line number Diff line
@@ -87,6 +87,9 @@ public class RecentsActivity extends Activity implements ViewTreeObserver.OnPreD 
    private final static String TAG = "RecentsActivity";

    private final static boolean DEBUG = false;



    private final static String KEY_SAVED_STATE_HISTORY_VISIBLE =

            "saved_instance_state_history_visible";



    public final static int EVENT_BUS_PRIORITY = Recents.EVENT_BUS_PRIORITY + 1;



    private RecentsPackageMonitor mPackageMonitor;
@@ -499,6 +502,25 @@ public class RecentsActivity extends Activity implements ViewTreeObserver.OnPreD 
        EventBus.getDefault().unregister(mScrimViews);

    }



    @Override

    protected void onSaveInstanceState(Bundle outState) {

        super.onSaveInstanceState(outState);

        outState.putBoolean(KEY_SAVED_STATE_HISTORY_VISIBLE,

                (mHistoryView != null) && mHistoryView.isVisible());

    }



    @Override

    protected void onRestoreInstanceState(Bundle savedInstanceState) {

        super.onRestoreInstanceState(savedInstanceState);

        if (savedInstanceState.getBoolean(KEY_SAVED_STATE_HISTORY_VISIBLE, false)) {

            ReferenceCountedTrigger postHideStackAnimationTrigger =

                    new ReferenceCountedTrigger(this);

            postHideStackAnimationTrigger.increment();

            EventBus.getDefault().send(new ShowHistoryEvent(postHideStackAnimationTrigger));

            postHideStackAnimationTrigger.decrement();

        }

    }



    @Override

    public void onTrimMemory(int level) {

        RecentsTaskLoader loader = Recents.getTaskLoader();

packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java

+25 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ import android.graphics.RectF; 
import android.graphics.drawable.Drawable;

import android.graphics.drawable.GradientDrawable;

import android.os.Bundle;

import android.os.Parcelable;

import android.util.IntProperty;

import android.util.Log;

import android.util.Property;
@@ -91,6 +92,12 @@ public class TaskStackView extends FrameLayout implements TaskStack.TaskStackCal 
    private final static String TAG = "TaskStackView";

    private final static boolean DEBUG = false;



    private final static String KEY_SAVED_STATE_SUPER = "saved_instance_state_super";

    private final static String KEY_SAVED_STATE_LAYOUT_FOCUSED_STATE =

            "saved_instance_state_layout_focused_state";

    private final static String KEY_SAVED_STATE_LAYOUT_STACK_SCROLL =

            "saved_instance_state_layout_stack_scroll";



    // The thresholds at which to show/hide the history button.

    private static final float SHOW_HISTORY_BUTTON_SCROLL_THRESHOLD = 0.3f;

    private static final float HIDE_HISTORY_BUTTON_SCROLL_THRESHOLD = 0.3f;
@@ -827,6 +834,24 @@ public class TaskStackView extends FrameLayout implements TaskStack.TaskStackCal 
        }

    }



    @Override

    protected Parcelable onSaveInstanceState() {

        Bundle savedState = new Bundle();

        savedState.putParcelable(KEY_SAVED_STATE_SUPER, super.onSaveInstanceState());

        savedState.putFloat(KEY_SAVED_STATE_LAYOUT_FOCUSED_STATE, mLayoutAlgorithm.getFocusState());

        savedState.putFloat(KEY_SAVED_STATE_LAYOUT_STACK_SCROLL, mStackScroller.getStackScroll());

        return super.onSaveInstanceState();

    }



    @Override

    protected void onRestoreInstanceState(Parcelable state) {

        Bundle savedState = (Bundle) state;

        super.onRestoreInstanceState(savedState.getParcelable(KEY_SAVED_STATE_SUPER));



        mLayoutAlgorithm.setFocusState(savedState.getFloat(KEY_SAVED_STATE_LAYOUT_FOCUSED_STATE));

        mStackScroller.setStackScroll(savedState.getFloat(KEY_SAVED_STATE_LAYOUT_STACK_SCROLL));

    }



    @Override

    public CharSequence getAccessibilityClassName() {

        return TaskStackView.class.getName();