Low profile mode ("lights out") for phone status bar.

Also changes NAVIGATION_HIDDEN to remove the hide animation,
hopefully reducing the number of jarring transitions when
apps want to enable super-ultra-full-screen mode.

Bug: 5052456
Bug: 5146960
Change-Id: I5f5ebb23add81243dc8861b65d8f15ca4d9ce0d2

3 files changed, 179 insertions, 13 deletions

diff --git a/packages/SystemUI/res/layout/navigation_bar.xml b/packages/SystemUI/res/layout/navigation_bar.xml
index 6c4c9c1..fbca299 100644
--- a/packages/SystemUI/res/layout/navigation_bar.xml
+++ b/packages/SystemUI/res/layout/navigation_bar.xml
@@ -23,12 +23,12 @@
     xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui"
     android:layout_height="match_parent"
     android:layout_width="match_parent"
+    android:background="#FF000000"
     >
 
     <FrameLayout android:id="@+id/rot0"
         android:layout_height="match_parent"
         android:layout_width="match_parent"
-        android:background="#FF000000"
         >
 
         <LinearLayout
@@ -98,6 +98,51 @@
                 />
         </LinearLayout>
 
+        <!-- lights out layout to match exactly -->
+        <LinearLayout
+            android:layout_height="match_parent"
+            android:layout_width="match_parent"
+            android:orientation="horizontal"
+            android:id="@+id/lights_out"
+            android:visibility="gone"
+            >
+            <ImageView
+                android:layout_width="80dp"
+                android:layout_height="match_parent"
+                android:layout_marginLeft="40dp"
+                android:src="@drawable/ic_sysbar_lights_out_dot_small"
+                android:scaleType="center"
+                android:layout_weight="0"
+                />
+            <View 
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:visibility="invisible"
+                />
+            <ImageView
+                android:layout_width="80dp"
+                android:layout_height="match_parent"
+                android:src="@drawable/ic_sysbar_lights_out_dot_large"
+                android:scaleType="center"
+                android:layout_weight="0"
+                />
+            <View 
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:visibility="invisible"
+                />
+            <ImageView
+                android:layout_width="80dp"
+                android:layout_marginRight="40dp"
+                android:layout_height="match_parent"
+                android:src="@drawable/ic_sysbar_lights_out_dot_small"
+                android:scaleType="center"
+                android:layout_weight="0"
+                />
+        </LinearLayout>
+
         <View android:id="@+id/deadzone"
             android:layout_height="@dimen/navigation_bar_deadzone_size"
             android:layout_width="match_parent"
@@ -109,7 +154,6 @@
     <FrameLayout android:id="@+id/rot90"
         android:layout_height="match_parent"
         android:layout_width="match_parent"
-        android:background="#FF000000"
         android:visibility="gone"
         android:paddingTop="24dp"
         >
@@ -131,6 +175,8 @@
                 systemui:keyCode="82"
                 android:layout_weight="0"
                 android:visibility="invisible"
+                android:contentDescription="@string/accessibility_menu"
+                systemui:glowBackground="@drawable/ic_sysbar_highlight_land"
                 />
             <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/recent_apps"
                 android:layout_height="80dp"
@@ -171,15 +217,56 @@
                 android:contentDescription="@string/accessibility_back"
                 systemui:glowBackground="@drawable/ic_sysbar_highlight_land"
                 />
-            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
+            <View
                 android:layout_height="40dp"
                 android:layout_width="match_parent"
-                android:src="@drawable/ic_sysbar_menu_land"
-                systemui:keyCode="82"
                 android:layout_weight="0"
                 android:visibility="invisible"
-                android:contentDescription="@string/accessibility_menu"
-                systemui:glowBackground="@drawable/ic_sysbar_highlight_land"
+                />
+        </LinearLayout>
+
+        <!-- lights out layout to match exactly -->
+        <LinearLayout 
+            android:layout_height="match_parent"
+            android:layout_width="match_parent"
+            android:orientation="vertical"
+            android:id="@+id/lights_out"
+            android:visibility="gone"
+            >
+            <ImageView
+                android:layout_height="80dp"
+                android:layout_marginTop="40dp"
+                android:layout_width="match_parent"
+                android:src="@drawable/ic_sysbar_lights_out_dot_small"
+                android:scaleType="center"
+                android:layout_weight="0"
+                />
+            <View 
+                android:layout_height="match_parent"
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:visibility="invisible"
+                />
+            <ImageView
+                android:layout_height="80dp"
+                android:layout_width="match_parent"
+                android:src="@drawable/ic_sysbar_lights_out_dot_large"
+                android:scaleType="center"
+                android:layout_weight="0"
+                />
+            <View 
+                android:layout_height="match_parent"
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:visibility="invisible"
+                />
+            <ImageView
+                android:layout_height="80dp"
+                android:layout_marginBottom="40dp"
+                android:layout_width="match_parent"
+                android:src="@drawable/ic_sysbar_lights_out_dot_small"
+                android:scaleType="center"
+                android:layout_weight="0"
                 />
         </LinearLayout>
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
index 5f1ae58..e6c0b96 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
@@ -25,6 +25,7 @@ import android.content.res.Resources;
 import android.os.ServiceManager;
 import android.util.AttributeSet;
 import android.util.Slog;
+import android.view.animation.AccelerateInterpolator;
 import android.view.Display;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
@@ -47,6 +48,8 @@ public class NavigationBarView extends LinearLayout {
 
     final static boolean NAVBAR_ALWAYS_AT_RIGHT = true;
 
+    final static boolean ANIMATE_HIDE_TRANSITION = false; // turned off because it introduces unsightly delay when videos goes to full screen
+
     protected IStatusBarService mBarService;
     final Display mDisplay;
     View mCurrentView = null;
@@ -56,7 +59,7 @@ public class NavigationBarView extends LinearLayout {
     int mBarSize;
     boolean mVertical;
 
-    boolean mHidden;
+    boolean mHidden, mLowProfile;
     boolean mEnabled = true;
 
     public View getRecentsButton() {
@@ -87,6 +90,65 @@ public class NavigationBarView extends LinearLayout {
         mCurrentView.setVisibility(enable ? View.VISIBLE : View.INVISIBLE);
     }
 
+    View.OnTouchListener mLightsOutListener = new View.OnTouchListener() {
+        @Override
+        public boolean onTouch(View v, MotionEvent ev) {
+            if (ev.getAction() == MotionEvent.ACTION_DOWN) {
+                // even though setting the systemUI visibility below will turn these views
+                // on, we need them to come up faster so that they can catch this motion
+                // event
+                setLowProfile(false, false);
+
+                try {
+                    mBarService.setSystemUiVisibility(0);
+                } catch (android.os.RemoteException ex) {
+                }
+            }
+            return false;
+        }
+    };
+
+    public void setLowProfile(final boolean lightsOut) {
+        setLowProfile(lightsOut, true);
+    }
+
+    public void setLowProfile(final boolean lightsOut, final boolean animate) {
+        if (lightsOut == mLowProfile) return;
+
+        mLowProfile = lightsOut;
+
+        if (DEBUG) Slog.d(TAG, "setting lights " + (lightsOut?"out":"on"));
+
+        final View navButtons = mCurrentView.findViewById(R.id.nav_buttons);
+        final View lowLights = mCurrentView.findViewById(R.id.lights_out);
+
+        if (!animate) {
+            lowLights.setVisibility(View.GONE);
+            navButtons.setAlpha(1f);
+        } else {
+            navButtons.animate()
+                .alpha(lightsOut ? 0f : 1f)
+                .setDuration(lightsOut ? 600 : 200)
+                .start();
+
+            lowLights.setOnTouchListener(mLightsOutListener);
+            lowLights.setAlpha(0f);
+            lowLights.setVisibility(View.VISIBLE);
+            lowLights.animate()
+                .alpha(lightsOut ? 1f : 0f)
+                .setStartDelay(lightsOut ? 500 : 0)
+                .setDuration(lightsOut ? 1000 : 300)
+                .setInterpolator(new AccelerateInterpolator(2.0f))
+                .setListener(lightsOut ? null : new AnimatorListenerAdapter() {
+                    @Override
+                    public void onAnimationEnd(Animator _a) {
+                        lowLights.setVisibility(View.GONE);
+                    }
+                })
+                .start();
+        }
+    }
+
     public void setHidden(final boolean hide) {
         if (hide == mHidden) return;
 
@@ -94,6 +156,14 @@ public class NavigationBarView extends LinearLayout {
         Slog.d(TAG,
             (hide ? "HIDING" : "SHOWING") + " navigation bar");
 
+        // bring up the lights no matter what
+        setLowProfile(false);
+
+        if (!ANIMATE_HIDE_TRANSITION) {
+            setVisibility(hide ? View.GONE : View.VISIBLE);
+            return;
+        }
+
         float oldAlpha = mCurrentView.getAlpha();
         if (DEBUG) {
             Slog.d(TAG, "animating alpha: " + oldAlpha + " -> "
@@ -147,8 +217,10 @@ public class NavigationBarView extends LinearLayout {
 
     @Override
     public boolean onTouchEvent(MotionEvent ev) {
-        // immediately bring up the lights
-        setHidden(false);
+        try {
+            mBarService.setSystemUiVisibility(0);
+        } catch (android.os.RemoteException ex) {
+        }
         return false; // pass it on
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index fab593e..7a563c7 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -1494,11 +1494,18 @@ public class PhoneStatusBar extends StatusBar {
 
     @Override // CommandQueue
     public void setSystemUiVisibility(int vis) {
-        if (vis != mSystemUiVisibility) {
+        final int old = mSystemUiVisibility;
+        final int diff = vis ^ old;
+
+        if (diff != 0) {
             mSystemUiVisibility = vis;
 
-            if (0 != (vis & View.SYSTEM_UI_FLAG_LOW_PROFILE)) {
-                animateCollapse();
+            if (0 != (diff & View.SYSTEM_UI_FLAG_LOW_PROFILE)) {
+                final boolean lightsOut = (0 != (vis & View.SYSTEM_UI_FLAG_LOW_PROFILE));
+                if (lightsOut) {
+                    animateCollapse();
+                }
+                mNavigationBarView.setLowProfile(lightsOut);
             }
 
             notifyUiVisibilityChanged();