Merge "Add setDarkAmount method to ClockPlugin interface."

packages/SystemUI/plugin/src/com/android/systemui/plugins/ClockPlugin.java

@@ -49,4 +49,10 @@ public interface ClockPlugin extends Plugin {
      * Notifies that time tick alarm from doze service fired.
      */
     default void dozeTimeTick() { }
+
+    /**
+     * Set the amount (ratio) that the device has transitioned to doze.
+     * @param darkAmount Amount of transition to doze: 1f for doze and 0f for awake.
+     */
+    default void setDarkAmount(float darkAmount) {}
 }

packages/SystemUI/src/com/android/keyguard/KeyguardClockSwitch.java

@@ -126,6 +126,16 @@ public class KeyguardClockSwitch extends FrameLayout {
         mClockView.setFormat24Hour(format);
     }
 
+    /**
+     * Set the amount (ratio) that the device has transitioned to doze.
+     * @param darkAmount Amount of transition to doze: 1f for doze and 0f for awake.
+     */
+    public void setDarkAmount(float darkAmount) {
+        if (mClockPlugin != null) {
+            mClockPlugin.setDarkAmount(darkAmount);
+        }
+    }
+
     public Paint getPaint() {
         return mClockView.getPaint();
     }

packages/SystemUI/src/com/android/keyguard/KeyguardStatusView.java

@@ -385,6 +385,7 @@ public class KeyguardStatusView extends GridLayout implements
             return;
         }
         mDarkAmount = darkAmount;
+        mClockView.setDarkAmount(darkAmount);
         updateDark();
     }