Merge "Add DisplayManager tests to presubmit." into sc-dev
diff --git a/core/api/current.txt b/core/api/current.txt
index 8757830..e264f1d 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -1614,6 +1614,7 @@
     field public static final int windowAllowReturnTransitionOverlap = 16843835; // 0x101043b
     field public static final int windowAnimationStyle = 16842926; // 0x10100ae
     field public static final int windowBackground = 16842836; // 0x1010054
+    field public static final int windowBackgroundBlurRadius = 16844331; // 0x101062b
     field public static final int windowBackgroundFallback = 16844035; // 0x1010503
     field public static final int windowBlurBehindEnabled = 16844316; // 0x101061c
     field public static final int windowBlurBehindRadius = 16844315; // 0x101061b
@@ -49365,6 +49366,7 @@
     method public void setAllowEnterTransitionOverlap(boolean);
     method public void setAllowReturnTransitionOverlap(boolean);
     method public void setAttributes(android.view.WindowManager.LayoutParams);
+    method public void setBackgroundBlurRadius(int);
     method public abstract void setBackgroundDrawable(android.graphics.drawable.Drawable);
     method public void setBackgroundDrawableResource(@DrawableRes int);
     method public void setCallback(android.view.Window.Callback);
diff --git a/core/api/test-current.txt b/core/api/test-current.txt
index 694507d..1be0fba 100644
--- a/core/api/test-current.txt
+++ b/core/api/test-current.txt
@@ -1348,6 +1348,12 @@
     field public static final int INVALID_SECURITY_PARAMETER_INDEX = 0; // 0x0
   }
 
+  public class NetworkPolicyManager {
+    method public boolean getRestrictBackground();
+    method @NonNull public static String resolveNetworkId(@NonNull android.net.wifi.WifiConfiguration);
+    method public void setRestrictBackground(boolean);
+  }
+
   public class NetworkStack {
     method public static void setServiceForTest(@Nullable android.os.IBinder);
   }
diff --git a/core/api/test-lint-baseline.txt b/core/api/test-lint-baseline.txt
index 3c67e44..87fb5b1 100644
--- a/core/api/test-lint-baseline.txt
+++ b/core/api/test-lint-baseline.txt
@@ -487,6 +487,8 @@
     
 GetterSetterNames: android.location.LocationRequest#isLowPowerMode():
     
+GetterSetterNames: android.net.NetworkPolicyManager#getRestrictBackground():
+    Symmetric method for `setRestrictBackground` must be named `isRestrictBackground`; was `getRestrictBackground`
 GetterSetterNames: android.os.IncidentReportArgs#isAll():
     
 GetterSetterNames: android.service.notification.NotificationStats#setDirectReplied():
diff --git a/core/java/android/net/NetworkPolicyManager.java b/core/java/android/net/NetworkPolicyManager.java
index 3e6237d..6353a25 100644
--- a/core/java/android/net/NetworkPolicyManager.java
+++ b/core/java/android/net/NetworkPolicyManager.java
@@ -22,6 +22,7 @@
 import android.annotation.NonNull;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemService;
+import android.annotation.TestApi;
 import android.app.ActivityManager;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
@@ -55,6 +56,7 @@
  *
  * @hide
  */
+@TestApi
 @SystemService(Context.NETWORK_POLICY_SERVICE)
 public class NetworkPolicyManager {
 
@@ -125,6 +127,7 @@
     public static final int RULE_REJECT_ALL = 1 << 6;
     /**
      * Reject traffic on all networks for restricted networking mode.
+     * @hide
      */
     public static final int RULE_REJECT_RESTRICTED_MODE = 1 << 10;
 
@@ -351,6 +354,7 @@
     }
 
     /** @hide */
+    @TestApi
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public void setRestrictBackground(boolean restrictBackground) {
         try {
@@ -361,6 +365,7 @@
     }
 
     /** @hide */
+    @TestApi
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public boolean getRestrictBackground() {
         try {
@@ -506,6 +511,8 @@
 
     /**
      * Get multipath preference for the given network.
+     *
+     * @hide
      */
     public int getMultipathPreference(Network network) {
         try {
@@ -624,7 +631,9 @@
     }
 
     /** @hide */
-    public static String resolveNetworkId(WifiConfiguration config) {
+    @TestApi
+    @NonNull
+    public static String resolveNetworkId(@NonNull WifiConfiguration config) {
         return WifiInfo.sanitizeSsid(config.isPasspoint()
                 ? config.providerFriendlyName : config.SSID);
     }
diff --git a/core/java/android/view/Window.java b/core/java/android/view/Window.java
index af18293..4ecdd78 100644
--- a/core/java/android/view/Window.java
+++ b/core/java/android/view/Window.java
@@ -1703,6 +1703,30 @@
     public abstract void setBackgroundDrawable(Drawable drawable);
 
     /**
+     * Blurs the screen behind the window within the bounds of the window.
+     *
+     * The density of the blur is set by the blur radius. The radius defines the size
+     * of the neighbouring area, from which pixels will be averaged to form the final
+     * color for each pixel. The operation approximates a Gaussian blur.
+     * A radius of 0 means no blur. The higher the radius, the denser the blur.
+     *
+     * The window background drawable is drawn on top of the blurred region. The blur
+     * region bounds and rounded corners will mimic those of the background drawable.
+     *
+     * For the blur region to be visible, the window has to be translucent. See
+     * {@link android.R.styleable#Window_windowIsTranslucent}.
+     *
+     * Note the difference with {@link android.view.WindowManager.LayoutParams#blurBehindRadius},
+     * which blurs the whole screen behind the window. Background blur blurs the screen behind
+     * only within the bounds of the window.
+     *
+     * @param blurRadius The blur radius to use for window background blur in pixels
+     *
+     * @see android.R.styleable#Window_windowBackgroundBlurRadius
+     */
+    public void setBackgroundBlurRadius(int blurRadius) {}
+
+    /**
      * Set the value for a drawable feature of this window, from a resource
      * identifier.  You must have called requestFeature(featureId) before
      * calling this function.
diff --git a/core/java/com/android/internal/policy/DecorView.java b/core/java/com/android/internal/policy/DecorView.java
index adebde0..9840013 100644
--- a/core/java/com/android/internal/policy/DecorView.java
+++ b/core/java/com/android/internal/policy/DecorView.java
@@ -110,6 +110,7 @@
 import android.widget.PopupWindow;
 
 import com.android.internal.R;
+import com.android.internal.graphics.drawable.BackgroundBlurDrawable;
 import com.android.internal.policy.PhoneWindow.PanelFeatureState;
 import com.android.internal.policy.PhoneWindow.PhoneWindowMenuCallback;
 import com.android.internal.view.FloatingActionMode;
@@ -255,6 +256,7 @@
     private Drawable mOriginalBackgroundDrawable;
     private Drawable mLastOriginalBackgroundDrawable;
     private Drawable mResizingBackgroundDrawable;
+    private BackgroundBlurDrawable mBackgroundBlurDrawable;
 
     /**
      * Temporary holder for a window background when it is set before {@link #mWindow} is
@@ -280,9 +282,14 @@
     private final Paint mLegacyNavigationBarBackgroundPaint = new Paint();
     private Insets mBackgroundInsets = Insets.NONE;
     private Insets mLastBackgroundInsets = Insets.NONE;
+    private int mLastBackgroundBlurRadius = 0;
     private boolean mDrawLegacyNavigationBarBackground;
 
     private PendingInsetsController mPendingInsetsController = new PendingInsetsController();
+    private final ViewTreeObserver.OnPreDrawListener mBackgroundBlurOnPreDrawListener = () -> {
+        updateBackgroundBlur();
+        return true;
+    };
 
     DecorView(Context context, int featureId, PhoneWindow window,
             WindowManager.LayoutParams params) {
@@ -1263,18 +1270,27 @@
         if (mBackgroundInsets == null) {
             mBackgroundInsets = Insets.NONE;
         }
+
         if (mBackgroundInsets.equals(mLastBackgroundInsets)
+                && mWindow.mBackgroundBlurRadius == mLastBackgroundBlurRadius
                 && mLastOriginalBackgroundDrawable == mOriginalBackgroundDrawable) {
             return;
         }
-        if (mOriginalBackgroundDrawable == null || mBackgroundInsets.equals(Insets.NONE)) {
 
-            // Call super since we are intercepting setBackground on this class.
-            super.setBackgroundDrawable(mOriginalBackgroundDrawable);
-        } else {
+        Drawable destDrawable = mOriginalBackgroundDrawable;
+        if (mWindow.mBackgroundBlurRadius > 0 && getViewRootImpl() != null
+                && mWindow.isTranslucent()) {
+            if (mBackgroundBlurDrawable == null) {
+                mBackgroundBlurDrawable = getViewRootImpl().createBackgroundBlurDrawable();
+            }
+            destDrawable = new LayerDrawable(new Drawable[] {mBackgroundBlurDrawable,
+                                                             mOriginalBackgroundDrawable});
+            mLastBackgroundBlurRadius = mWindow.mBackgroundBlurRadius;
+        }
 
-            // Call super since we are intercepting setBackground on this class.
-            super.setBackgroundDrawable(new InsetDrawable(mOriginalBackgroundDrawable,
+
+        if (destDrawable != null && !mBackgroundInsets.equals(Insets.NONE)) {
+            destDrawable = new InsetDrawable(destDrawable,
                     mBackgroundInsets.left, mBackgroundInsets.top,
                     mBackgroundInsets.right, mBackgroundInsets.bottom) {
 
@@ -1286,12 +1302,32 @@
                 public boolean getPadding(Rect padding) {
                     return getDrawable().getPadding(padding);
                 }
-            });
+            };
         }
+
+        // Call super since we are intercepting setBackground on this class.
+        super.setBackgroundDrawable(destDrawable);
+
         mLastBackgroundInsets = mBackgroundInsets;
         mLastOriginalBackgroundDrawable = mOriginalBackgroundDrawable;
     }
 
+    private void updateBackgroundBlur() {
+        if (mBackgroundBlurDrawable == null) return;
+
+        // If the blur radius is 0, the blur region won't be sent to surface flinger, so we don't
+        // need to calculate the corner radius.
+        if (mWindow.mBackgroundBlurRadius > 0) {
+            if (mOriginalBackgroundDrawable != null) {
+                final Outline outline = new Outline();
+                mOriginalBackgroundDrawable.getOutline(outline);
+                mBackgroundBlurDrawable.setCornerRadius(outline.mMode == Outline.MODE_ROUND_RECT
+                                                           ? outline.getRadius() : 0);
+            }
+        }
+        mBackgroundBlurDrawable.setBlurRadius(mWindow.mBackgroundBlurRadius);
+    }
+
     @Override
     public Drawable getBackground() {
         return mOriginalBackgroundDrawable;
@@ -1722,6 +1758,9 @@
             cb.onAttachedToWindow();
         }
 
+        getViewTreeObserver().addOnPreDrawListener(mBackgroundBlurOnPreDrawListener);
+        updateBackgroundDrawable();
+
         if (mFeatureId == -1) {
             /*
              * The main window has been attached, try to restore any panels
@@ -1755,6 +1794,8 @@
             cb.onDetachedFromWindow();
         }
 
+        getViewTreeObserver().removeOnPreDrawListener(mBackgroundBlurOnPreDrawListener);
+
         if (mWindow.mDecorContentParent != null) {
             mWindow.mDecorContentParent.dismissPopups();
         }
diff --git a/core/java/com/android/internal/policy/PhoneWindow.java b/core/java/com/android/internal/policy/PhoneWindow.java
index 5df175e..d06413c 100644
--- a/core/java/com/android/internal/policy/PhoneWindow.java
+++ b/core/java/com/android/internal/policy/PhoneWindow.java
@@ -258,6 +258,8 @@
     Drawable mBackgroundDrawable = null;
     Drawable mBackgroundFallbackDrawable = null;
 
+    int mBackgroundBlurRadius = 0;
+
     private boolean mLoadElevation = true;
     private float mElevation;
 
@@ -1523,6 +1525,15 @@
     }
 
     @Override
+    public final void setBackgroundBlurRadius(int blurRadius) {
+        super.setBackgroundBlurRadius(blurRadius);
+        if (getContext().getPackageManager().hasSystemFeature(
+                    PackageManager.FEATURE_CROSS_LAYER_BLUR)) {
+            mBackgroundBlurRadius = Math.max(blurRadius, 0);
+        }
+    }
+
+    @Override
     public final void setFeatureDrawableResource(int featureId, int resId) {
         if (resId != 0) {
             DrawableFeatureState st = getDrawableState(featureId, true);
@@ -2549,6 +2560,9 @@
                     android.R.styleable.Window_windowBlurBehindRadius, 0);
         }
 
+        setBackgroundBlurRadius(a.getDimensionPixelSize(
+                R.styleable.Window_windowBackgroundBlurRadius, 0));
+
 
         if (params.windowAnimations == 0) {
             params.windowAnimations = a.getResourceId(
diff --git a/core/res/res/values/attrs.xml b/core/res/res/values/attrs.xml
index aeb4fc468..823e10e 100644
--- a/core/res/res/values/attrs.xml
+++ b/core/res/res/values/attrs.xml
@@ -362,6 +362,12 @@
              surface when the app has not drawn any content into this area. One example is
              when the user is resizing a window of an activity in multi-window mode. -->
         <attr name="windowBackgroundFallback" format="reference|color" />
+        <!-- Blur the screen behind the window with the bounds of the window.
+             The radius defines the size of the neighbouring area, from which pixels will be
+             averaged to form the final color for each pixel in the region.
+             A radius of 0 means no blur. The higher the radius, the denser the blur.
+             Corresponds to {@link android.view.Window#setBackgroundBlurRadius}. -->
+        <attr name="windowBackgroundBlurRadius" format="dimension" />
         <!-- Drawable to use as a frame around the window. -->
         <attr name="windowFrame" format="reference" />
         <!-- Flag indicating whether there should be no title on this window. -->
@@ -1966,6 +1972,7 @@
     <declare-styleable name="Window">
         <attr name="windowBackground" />
         <attr name="windowBackgroundFallback" />
+        <attr name="windowBackgroundBlurRadius" />
         <attr name="windowContentOverlay" />
         <attr name="windowFrame" />
         <attr name="windowNoTitle" />
diff --git a/core/res/res/values/public.xml b/core/res/res/values/public.xml
index 068987e..3c97aec 100644
--- a/core/res/res/values/public.xml
+++ b/core/res/res/values/public.xml
@@ -3065,6 +3065,7 @@
     <public name="clipToOutline" />
     <public name="edgeEffectType" />
     <public name="knownCerts" />
+    <public name="windowBackgroundBlurRadius"/>
   </public-group>
 
   <public-group type="drawable" first-id="0x010800b5">
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 65b670b..4b9fed2 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -4987,9 +4987,7 @@
     private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
-            // TODO: make BroadcastInterceptingContext use the Handler passed in to registerReceiver
-            // and put this back.
-            // ensureRunningOnConnectivityServiceThread();
+            ensureRunningOnConnectivityServiceThread();
             final String action = intent.getAction();
             final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL);
 
diff --git a/tests/net/java/com/android/server/ConnectivityServiceTest.java b/tests/net/java/com/android/server/ConnectivityServiceTest.java
index ee04973..c5e76a9 100644
--- a/tests/net/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/net/java/com/android/server/ConnectivityServiceTest.java
@@ -1300,10 +1300,8 @@
     }
 
     private void processBroadcastForVpn(Intent intent) {
-        // The BroadcastReceiver for this broadcast checks it is being run on the handler thread.
-        final Handler handler = new Handler(mVMSHandlerThread.getLooper());
-        handler.post(() -> mServiceContext.sendBroadcast(intent));
-        HandlerUtils.waitForIdle(handler, TIMEOUT_MS);
+        mServiceContext.sendBroadcast(intent);
+        HandlerUtils.waitForIdle(mVMSHandlerThread, TIMEOUT_MS);
         waitForIdle();
     }
 
@@ -1430,6 +1428,7 @@
         FakeSettingsProvider.clearSettingsProvider();
         mServiceContext = new MockContext(InstrumentationRegistry.getContext(),
                 new FakeSettingsProvider());
+        mServiceContext.setUseRegisteredHandlers(true);
         LocalServices.removeServiceForTest(NetworkPolicyManagerInternal.class);
         LocalServices.addService(
                 NetworkPolicyManagerInternal.class, mock(NetworkPolicyManagerInternal.class));
diff --git a/tests/utils/testutils/java/com/android/internal/util/test/BroadcastInterceptingContext.java b/tests/utils/testutils/java/com/android/internal/util/test/BroadcastInterceptingContext.java
index 1102624..4a1f96d 100644
--- a/tests/utils/testutils/java/com/android/internal/util/test/BroadcastInterceptingContext.java
+++ b/tests/utils/testutils/java/com/android/internal/util/test/BroadcastInterceptingContext.java
@@ -42,6 +42,8 @@
 
     private final List<BroadcastInterceptor> mInterceptors = new ArrayList<>();
 
+    private boolean mUseRegisteredHandlers;
+
     public abstract class FutureIntent extends FutureTask<Intent> {
         public FutureIntent() {
             super(
@@ -61,17 +63,24 @@
     public class BroadcastInterceptor extends FutureIntent {
         private final BroadcastReceiver mReceiver;
         private final IntentFilter mFilter;
+        private final Handler mHandler;
 
-        public BroadcastInterceptor(BroadcastReceiver receiver, IntentFilter filter) {
+        public BroadcastInterceptor(BroadcastReceiver receiver, IntentFilter filter,
+                Handler handler) {
             mReceiver = receiver;
             mFilter = filter;
+            mHandler = mUseRegisteredHandlers ? handler : null;
         }
 
         public boolean dispatchBroadcast(Intent intent) {
             if (mFilter.match(getContentResolver(), intent, false, TAG) > 0) {
                 if (mReceiver != null) {
                     final Context context = BroadcastInterceptingContext.this;
-                    mReceiver.onReceive(context, intent);
+                    if (mHandler == null) {
+                        mReceiver.onReceive(context, intent);
+                    } else {
+                        mHandler.post(() -> mReceiver.onReceive(context, intent));
+                    }
                     return false;
                 } else {
                     set(intent);
@@ -116,25 +125,38 @@
     }
 
     public FutureIntent nextBroadcastIntent(IntentFilter filter) {
-        final BroadcastInterceptor interceptor = new BroadcastInterceptor(null, filter);
+        final BroadcastInterceptor interceptor = new BroadcastInterceptor(null, filter, null);
         synchronized (mInterceptors) {
             mInterceptors.add(interceptor);
         }
         return interceptor;
     }
 
+    /**
+     * Whether to send broadcasts to registered handlers. By default, receivers are called
+     * synchronously by sendBroadcast. If this method is called with {@code true}, the receiver is
+     * instead called by a runnable posted to the Handler specified when the receiver was
+     * registered. This method applies only to future registrations, already-registered receivers
+     * are unaffected.
+     */
+    public void setUseRegisteredHandlers(boolean use) {
+        synchronized (mInterceptors) {
+            mUseRegisteredHandlers = use;
+        }
+    }
+
     @Override
     public Intent registerReceiver(BroadcastReceiver receiver, IntentFilter filter) {
-        synchronized (mInterceptors) {
-            mInterceptors.add(new BroadcastInterceptor(receiver, filter));
-        }
-        return null;
+        return registerReceiver(receiver, filter, null, null);
     }
 
     @Override
     public Intent registerReceiver(BroadcastReceiver receiver, IntentFilter filter,
             String broadcastPermission, Handler scheduler) {
-        return registerReceiver(receiver, filter);
+        synchronized (mInterceptors) {
+            mInterceptors.add(new BroadcastInterceptor(receiver, filter, scheduler));
+        }
+        return null;
     }
 
     @Override