1 files changed, 64 insertions, 0 deletions
diff --git a/java/com/android/incallui/InCallActivity.java b/java/com/android/incallui/InCallActivity.java
index fa4a06ecf..3ff1d269d 100644
--- a/java/com/android/incallui/InCallActivity.java
+++ b/java/com/android/incallui/InCallActivity.java
@@ -25,8 +25,12 @@ import android.app.KeyguardManager;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Configuration;
+import android.graphics.drawable.GradientDrawable;
+import android.graphics.drawable.GradientDrawable.Orientation;
 import android.os.Bundle;
 import android.os.Trace;
+import android.support.annotation.ColorInt;
+import android.support.annotation.FloatRange;
 import android.support.annotation.IntDef;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
@@ -36,6 +40,7 @@ import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
 import android.support.v4.content.res.ResourcesCompat;
+import android.support.v4.graphics.ColorUtils;
 import android.telecom.Call;
 import android.telecom.CallAudioState;
 import android.telecom.PhoneAccountHandle;
@@ -132,6 +137,7 @@ public class InCallActivity extends TransactionSafeFragmentActivity
   private Animation dialpadSlideInAnimation;
   private Animation dialpadSlideOutAnimation;
   private Dialog errorDialog;
+  private GradientDrawable backgroundDrawable;
   private InCallOrientationEventListener inCallOrientationEventListener;
   private View pseudoBlackScreenOverlay;
   private SelectPhoneAccountDialogFragment selectPhoneAccountDialogFragment;
@@ -150,6 +156,7 @@ public class InCallActivity extends TransactionSafeFragmentActivity
   private boolean isVisible;
   private boolean needDismissPendingDialogs;
   private boolean touchDownWhenPseudoScreenOff;
+  private int[] backgroundDrawableColors;
   @DialpadRequestType private int showDialpadRequest = DIALPAD_REQUEST_NONE;
   private SpeakEasyCallManager speakEasyCallManager;
   private DialogFragment rttRequestDialogFragment;
@@ -867,6 +874,11 @@ public class InCallActivity extends TransactionSafeFragmentActivity
 
   public void onForegroundCallChanged(DialerCall newForegroundCall) {
     updateTaskDescription();
+
+    if (newForegroundCall == null || !didShowAnswerScreen) {
+      LogUtil.v("InCallActivity.onForegroundCallChanged", "resetting background color");
+      updateWindowBackgroundColor(0 /* progress */);
+    }
   }
 
   private void updateTaskDescription() {
@@ -880,6 +892,58 @@ public class InCallActivity extends TransactionSafeFragmentActivity
             getResources().getString(R.string.notification_ongoing_call), null /* icon */, color));
   }
 
+  public void updateWindowBackgroundColor(@FloatRange(from = -1f, to = 1.0f) float progress) {
+    ThemeColorManager themeColorManager = InCallPresenter.getInstance().getThemeColorManager();
+    @ColorInt int top;
+    @ColorInt int middle;
+    @ColorInt int bottom;
+    @ColorInt int gray = 0x66000000;
+
+    if (isInMultiWindowMode()) {
+      top = themeColorManager.getBackgroundColorSolid();
+      middle = themeColorManager.getBackgroundColorSolid();
+      bottom = themeColorManager.getBackgroundColorSolid();
+    } else {
+      top = themeColorManager.getBackgroundColorTop();
+      middle = themeColorManager.getBackgroundColorMiddle();
+      bottom = themeColorManager.getBackgroundColorBottom();
+    }
+
+    if (progress < 0) {
+      float correctedProgress = Math.abs(progress);
+      top = ColorUtils.blendARGB(top, gray, correctedProgress);
+      middle = ColorUtils.blendARGB(middle, gray, correctedProgress);
+      bottom = ColorUtils.blendARGB(bottom, gray, correctedProgress);
+    }
+
+    boolean backgroundDirty = false;
+    if (backgroundDrawable == null) {
+      backgroundDrawableColors = new int[] {top, middle, bottom};
+      backgroundDrawable = new GradientDrawable(Orientation.TOP_BOTTOM, backgroundDrawableColors);
+      backgroundDirty = true;
+    } else {
+      if (backgroundDrawableColors[0] != top) {
+        backgroundDrawableColors[0] = top;
+        backgroundDirty = true;
+      }
+      if (backgroundDrawableColors[1] != middle) {
+        backgroundDrawableColors[1] = middle;
+        backgroundDirty = true;
+      }
+      if (backgroundDrawableColors[2] != bottom) {
+        backgroundDrawableColors[2] = bottom;
+        backgroundDirty = true;
+      }
+      if (backgroundDirty) {
+        backgroundDrawable.setColors(backgroundDrawableColors);
+      }
+    }
+
+    if (backgroundDirty) {
+      getWindow().setBackgroundDrawable(backgroundDrawable);
+    }
+  }
+
   public boolean isVisible() {
     return isVisible;
   }