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Commit cf7b3360 authored by JianYang Liu's avatar JianYang Liu Committed by Jian-Yang Liu
Browse files

Changed Notification shade's background alpha initial and final values 

to be configurable.

Bug: 143310145
Test: manual - took before and after videos
Change-Id: Ia0b6a56859889d538e21f807a88bc5217d89e64a
parent e7a7e470

packages/CarSystemUI/res/values/config.xml

+15 −0
Original line number Diff line number Diff line
@@ -40,6 +40,21 @@ 
         slots that may be reused for things like IME control. -->

    <integer name="config_maxNotificationIcons">0</integer>



    <!--

        Initial alpha percent value for the background when the notification

        shade is open. Should be a number between, and inclusive, 0 and 100.

        If the number is 0, then the background alpha starts off fully

        transparent. If the number if 100, then the background alpha starts off

        fully opaque. -->

    <integer name="config_initialNotificationBackgroundAlpha">0</integer>

    <!--

        Final alpha percent value for the background when the notification

        shade is fully open. Should be a number between, and inclusive, 0 and

        100. If this value is smaller than

        config_initialNotificationBackgroundAlpha, the background will default

        to a constant alpha percent value using the initial alpha. -->

    <integer name="config_finalNotificationBackgroundAlpha">100</integer>



    <!-- SystemUI Services: The classes of the stuff to start. -->

    <string-array name="config_systemUIServiceComponents" translatable="false">

        <item>com.android.systemui.util.NotificationChannels</item>

packages/CarSystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java

+33 −6
Original line number Diff line number Diff line
@@ -153,6 +153,9 @@ public class CarStatusBar extends StatusBar implements CarBatteryController.Batt 
    private float mOpeningVelocity = DEFAULT_FLING_VELOCITY;

    private float mClosingVelocity = DEFAULT_FLING_VELOCITY;



    private float mBackgroundAlphaDiff;

    private float mInitialBackgroundAlpha;



    private FullscreenUserSwitcher mFullscreenUserSwitcher;



    private CarBatteryController mCarBatteryController;
@@ -375,6 +378,25 @@ public class CarStatusBar extends StatusBar implements CarBatteryController.Batt 
        mScreenLifecycle = Dependency.get(ScreenLifecycle.class);

        mScreenLifecycle.addObserver(mScreenObserver);



      	// Notification bar related setup.

        mInitialBackgroundAlpha = (float) mContext.getResources().getInteger(

            R.integer.config_initialNotificationBackgroundAlpha) / 100;

        if (mInitialBackgroundAlpha < 0 || mInitialBackgroundAlpha > 100) {

            throw new RuntimeException(

              "Unable to setup notification bar due to incorrect initial background alpha"

                      + " percentage");

        }

        float finalBackgroundAlpha = Math.max(

            mInitialBackgroundAlpha,

            (float) mContext.getResources().getInteger(

                R.integer.config_finalNotificationBackgroundAlpha) / 100);

        if (finalBackgroundAlpha < 0 || finalBackgroundAlpha > 100) {

            throw new RuntimeException(

              "Unable to setup notification bar due to incorrect final background alpha"

                      + " percentage");

        }

        mBackgroundAlphaDiff = finalBackgroundAlpha - mInitialBackgroundAlpha;



        super.start();



        mNotificationPanel.setScrollingEnabled(true);
@@ -1094,17 +1116,22 @@ public class CarStatusBar extends StatusBar implements CarBatteryController.Batt 
            mHandleBar.setTranslationY(height - mHandleBar.getHeight() - lp.bottomMargin);

        }

        if (mNotificationView.getHeight() > 0) {

            // Calculates the alpha value for the background based on how much of the notification

            // shade is visible to the user. When the notification shade is completely open then

            // alpha value will be 1.

            float alpha = (float) height / mNotificationView.getHeight();

            Drawable background = mNotificationView.getBackground().mutate();



            background.setAlpha((int) (alpha * 255));

            background.setAlpha((int) (getBackgroundAlpha(height) * 255));

            mNotificationView.setBackground(background);

        }

    }



    /**

     * Calculates the alpha value for the background based on how much of the notification

     * shade is visible to the user. When the notification shade is completely open then

     * alpha value will be 1.

     */

    private float getBackgroundAlpha(int height) {

        return mInitialBackgroundAlpha +

            ((float) height / mNotificationView.getHeight() * mBackgroundAlphaDiff);

    }



    @Override

    public void onConfigChanged(Configuration newConfig) {

        super.onConfigChanged(newConfig);