diff --git a/Android.mk b/Android.mk
index 8daa1aa9c114b..c947b0e5b08eb 100644
--- a/Android.mk
+++ b/Android.mk
@@ -385,6 +385,8 @@ LOCAL_SRC_FILES += \
 	media/java/android/media/tv/ITvInputSessionCallback.aidl \
 	media/java/android/service/media/IMediaBrowserService.aidl \
 	media/java/android/service/media/IMediaBrowserServiceCallbacks.aidl \
+	telecomm/java/com/android/internal/telecom/ICallScreeningAdapter.aidl \
+	telecomm/java/com/android/internal/telecom/ICallScreeningService.aidl \
 	telecomm/java/com/android/internal/telecom/IVideoCallback.aidl \
 	telecomm/java/com/android/internal/telecom/IVideoProvider.aidl \
 	telecomm/java/com/android/internal/telecom/IConnectionService.aidl \
diff --git a/api/current.txt b/api/current.txt
index 37bfd2e75aaf3..3cdaa9fc65c33 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -33,6 +33,7 @@ package android {
     field public static final java.lang.String BIND_PRINT_SERVICE = "android.permission.BIND_PRINT_SERVICE";
     field public static final java.lang.String BIND_QUICK_SETTINGS_TILE = "android.permission.BIND_QUICK_SETTINGS_TILE";
     field public static final java.lang.String BIND_REMOTEVIEWS = "android.permission.BIND_REMOTEVIEWS";
+    field public static final java.lang.String BIND_SCREENING_SERVICE = "android.permission.BIND_SCREENING_SERVICE";
     field public static final java.lang.String BIND_TELECOM_CONNECTION_SERVICE = "android.permission.BIND_TELECOM_CONNECTION_SERVICE";
     field public static final java.lang.String BIND_TEXT_SERVICE = "android.permission.BIND_TEXT_SERVICE";
     field public static final java.lang.String BIND_TV_INPUT = "android.permission.BIND_TV_INPUT";
@@ -35372,6 +35373,30 @@ package android.telecom {
     field public static final int ROUTE_WIRED_OR_EARPIECE = 5; // 0x5
   }
 
+  public abstract class CallScreeningService extends android.app.Service {
+    ctor public CallScreeningService();
+    method public android.os.IBinder onBind(android.content.Intent);
+    method public abstract void onScreenCall(android.telecom.Call.Details);
+    method public final void respondToCall(android.telecom.Call.Details, android.telecom.CallScreeningService.CallResponse);
+    field public static final java.lang.String SERVICE_INTERFACE = "android.telecom.CallScreeningService";
+  }
+
+  public class CallScreeningService.CallResponse {
+    method public boolean getDisallowCall();
+    method public boolean getRejectCall();
+    method public boolean getSkipCallLog();
+    method public boolean getSkipNotification();
+  }
+
+  public class CallScreeningService.CallResponse.Builder {
+    ctor public CallScreeningService.CallResponse.Builder();
+    method public android.telecom.CallScreeningService.CallResponse build();
+    method public android.telecom.CallScreeningService.CallResponse.Builder setDisallowCall(boolean);
+    method public android.telecom.CallScreeningService.CallResponse.Builder setRejectCall(boolean);
+    method public android.telecom.CallScreeningService.CallResponse.Builder setSkipCallLog(boolean);
+    method public android.telecom.CallScreeningService.CallResponse.Builder setSkipNotification(boolean);
+  }
+
   public abstract class Conference extends android.telecom.Conferenceable {
     ctor public Conference(android.telecom.PhoneAccountHandle);
     method public final boolean addConnection(android.telecom.Connection);
diff --git a/api/system-current.txt b/api/system-current.txt
index 188c919f216f7..b1db464e9202a 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -46,6 +46,7 @@ package android {
     field public static final java.lang.String BIND_PRINT_SERVICE = "android.permission.BIND_PRINT_SERVICE";
     field public static final java.lang.String BIND_QUICK_SETTINGS_TILE = "android.permission.BIND_QUICK_SETTINGS_TILE";
     field public static final java.lang.String BIND_REMOTEVIEWS = "android.permission.BIND_REMOTEVIEWS";
+    field public static final java.lang.String BIND_SCREENING_SERVICE = "android.permission.BIND_SCREENING_SERVICE";
     field public static final java.lang.String BIND_TELECOM_CONNECTION_SERVICE = "android.permission.BIND_TELECOM_CONNECTION_SERVICE";
     field public static final java.lang.String BIND_TEXT_SERVICE = "android.permission.BIND_TEXT_SERVICE";
     field public static final java.lang.String BIND_TRUST_AGENT = "android.permission.BIND_TRUST_AGENT";
@@ -37679,6 +37680,30 @@ package android.telecom {
     field public static final int ROUTE_WIRED_OR_EARPIECE = 5; // 0x5
   }
 
+  public abstract class CallScreeningService extends android.app.Service {
+    ctor public CallScreeningService();
+    method public android.os.IBinder onBind(android.content.Intent);
+    method public abstract void onScreenCall(android.telecom.Call.Details);
+    method public final void respondToCall(android.telecom.Call.Details, android.telecom.CallScreeningService.CallResponse);
+    field public static final java.lang.String SERVICE_INTERFACE = "android.telecom.CallScreeningService";
+  }
+
+  public class CallScreeningService.CallResponse {
+    method public boolean getDisallowCall();
+    method public boolean getRejectCall();
+    method public boolean getSkipCallLog();
+    method public boolean getSkipNotification();
+  }
+
+  public class CallScreeningService.CallResponse.Builder {
+    ctor public CallScreeningService.CallResponse.Builder();
+    method public android.telecom.CallScreeningService.CallResponse build();
+    method public android.telecom.CallScreeningService.CallResponse.Builder setDisallowCall(boolean);
+    method public android.telecom.CallScreeningService.CallResponse.Builder setRejectCall(boolean);
+    method public android.telecom.CallScreeningService.CallResponse.Builder setSkipCallLog(boolean);
+    method public android.telecom.CallScreeningService.CallResponse.Builder setSkipNotification(boolean);
+  }
+
   public abstract class Conference extends android.telecom.Conferenceable {
     ctor public Conference(android.telecom.PhoneAccountHandle);
     method public final boolean addConnection(android.telecom.Connection);
diff --git a/api/test-current.txt b/api/test-current.txt
index d13ca99be4e88..e87df154a5a14 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -33,6 +33,7 @@ package android {
     field public static final java.lang.String BIND_PRINT_SERVICE = "android.permission.BIND_PRINT_SERVICE";
     field public static final java.lang.String BIND_QUICK_SETTINGS_TILE = "android.permission.BIND_QUICK_SETTINGS_TILE";
     field public static final java.lang.String BIND_REMOTEVIEWS = "android.permission.BIND_REMOTEVIEWS";
+    field public static final java.lang.String BIND_SCREENING_SERVICE = "android.permission.BIND_SCREENING_SERVICE";
     field public static final java.lang.String BIND_TELECOM_CONNECTION_SERVICE = "android.permission.BIND_TELECOM_CONNECTION_SERVICE";
     field public static final java.lang.String BIND_TEXT_SERVICE = "android.permission.BIND_TEXT_SERVICE";
     field public static final java.lang.String BIND_TV_INPUT = "android.permission.BIND_TV_INPUT";
@@ -35386,6 +35387,30 @@ package android.telecom {
     field public static final int ROUTE_WIRED_OR_EARPIECE = 5; // 0x5
   }
 
+  public abstract class CallScreeningService extends android.app.Service {
+    ctor public CallScreeningService();
+    method public android.os.IBinder onBind(android.content.Intent);
+    method public abstract void onScreenCall(android.telecom.Call.Details);
+    method public final void respondToCall(android.telecom.Call.Details, android.telecom.CallScreeningService.CallResponse);
+    field public static final java.lang.String SERVICE_INTERFACE = "android.telecom.CallScreeningService";
+  }
+
+  public class CallScreeningService.CallResponse {
+    method public boolean getDisallowCall();
+    method public boolean getRejectCall();
+    method public boolean getSkipCallLog();
+    method public boolean getSkipNotification();
+  }
+
+  public class CallScreeningService.CallResponse.Builder {
+    ctor public CallScreeningService.CallResponse.Builder();
+    method public android.telecom.CallScreeningService.CallResponse build();
+    method public android.telecom.CallScreeningService.CallResponse.Builder setDisallowCall(boolean);
+    method public android.telecom.CallScreeningService.CallResponse.Builder setRejectCall(boolean);
+    method public android.telecom.CallScreeningService.CallResponse.Builder setSkipCallLog(boolean);
+    method public android.telecom.CallScreeningService.CallResponse.Builder setSkipNotification(boolean);
+  }
+
   public abstract class Conference extends android.telecom.Conferenceable {
     ctor public Conference(android.telecom.PhoneAccountHandle);
     method public final boolean addConnection(android.telecom.Connection);
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 5a2f6015494bf..3aa7de57288b7 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -1407,6 +1407,13 @@
     <permission android:name="android.permission.BIND_INCALL_SERVICE"
         android:protectionLevel="signature|privileged" />
 
+    <!-- Must be required by a {@link android.telecom.CallScreeningService},
+         to ensure that only the system can bind to it.
+         <p>Protection level: signature|privileged
+    -->
+    <permission android:name="android.permission.BIND_SCREENING_SERVICE"
+        android:protectionLevel="signature|privileged" />
+
     <!-- Must be required by a {@link android.telecom.ConnectionService},
          to ensure that only the system can bind to it.
          @deprecated {@link android.telecom.ConnectionService}s should require
diff --git a/telecomm/java/android/telecom/Call.java b/telecomm/java/android/telecom/Call.java
index 385929428a524..de9020250f25a 100644
--- a/telecomm/java/android/telecom/Call.java
+++ b/telecomm/java/android/telecom/Call.java
@@ -265,6 +265,7 @@ public final class Call {
         // Next PROPERTY value: 0x00000040
         //******************************************************************************************
 
+        private final String mTelecomCallId;
         private final Uri mHandle;
         private final int mHandlePresentation;
         private final String mCallerDisplayName;
@@ -414,6 +415,11 @@ public final class Call {
             return builder.toString();
         }
 
+        /** {@hide} */
+        public String getTelecomCallId() {
+            return mTelecomCallId;
+        }
+
         /**
          * @return The handle (e.g., phone number) to which the {@code Call} is currently
          * connected.
@@ -567,6 +573,7 @@ public final class Call {
 
         /** {@hide} */
         public Details(
+                String telecomCallId,
                 Uri handle,
                 int handlePresentation,
                 String callerDisplayName,
@@ -581,6 +588,7 @@ public final class Call {
                 StatusHints statusHints,
                 Bundle extras,
                 Bundle intentExtras) {
+            mTelecomCallId = telecomCallId;
             mHandle = handle;
             mHandlePresentation = handlePresentation;
             mCallerDisplayName = callerDisplayName;
@@ -596,6 +604,26 @@ public final class Call {
             mExtras = extras;
             mIntentExtras = intentExtras;
         }
+
+        /** {@hide} */
+        public static Details createFromParcelableCall(ParcelableCall parcelableCall) {
+            return new Details(
+                    parcelableCall.getId(),
+                    parcelableCall.getHandle(),
+                    parcelableCall.getHandlePresentation(),
+                    parcelableCall.getCallerDisplayName(),
+                    parcelableCall.getCallerDisplayNamePresentation(),
+                    parcelableCall.getAccountHandle(),
+                    parcelableCall.getCapabilities(),
+                    parcelableCall.getProperties(),
+                    parcelableCall.getDisconnectCause(),
+                    parcelableCall.getConnectTimeMillis(),
+                    parcelableCall.getGatewayInfo(),
+                    parcelableCall.getVideoState(),
+                    parcelableCall.getStatusHints(),
+                    parcelableCall.getExtras(),
+                    parcelableCall.getIntentExtras());
+        }
     }
 
     public static abstract class Callback {
@@ -1022,21 +1050,7 @@ public final class Call {
     /** {@hide} */
     final void internalUpdate(ParcelableCall parcelableCall, Map<String, Call> callIdMap) {
         // First, we update the internal state as far as possible before firing any updates.
-        Details details = new Details(
-                parcelableCall.getHandle(),
-                parcelableCall.getHandlePresentation(),
-                parcelableCall.getCallerDisplayName(),
-                parcelableCall.getCallerDisplayNamePresentation(),
-                parcelableCall.getAccountHandle(),
-                parcelableCall.getCapabilities(),
-                parcelableCall.getProperties(),
-                parcelableCall.getDisconnectCause(),
-                parcelableCall.getConnectTimeMillis(),
-                parcelableCall.getGatewayInfo(),
-                parcelableCall.getVideoState(),
-                parcelableCall.getStatusHints(),
-                parcelableCall.getExtras(),
-                parcelableCall.getIntentExtras());
+        Details details = Details.createFromParcelableCall(parcelableCall);
         boolean detailsChanged = !Objects.equals(mDetails, details);
         if (detailsChanged) {
             mDetails = details;
diff --git a/telecomm/java/android/telecom/CallScreeningService.java b/telecomm/java/android/telecom/CallScreeningService.java
new file mode 100644
index 0000000000000..1b6e16221f9b9
--- /dev/null
+++ b/telecomm/java/android/telecom/CallScreeningService.java
@@ -0,0 +1,239 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telecom;
+
+import android.annotation.SdkConstant;
+import android.app.Service;
+import android.content.Intent;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.Message;
+import android.os.RemoteException;
+
+import com.android.internal.os.SomeArgs;
+import com.android.internal.telecom.ICallScreeningService;
+import com.android.internal.telecom.ICallScreeningAdapter;
+
+/**
+ * This service can be implemented by the default dialer (see
+ * {@link TelecomManager#getDefaultDialerPackage()}) to allow or disallow incoming calls before
+ * they are shown to a user.
+ * <p>
+ * Below is an example manifest registration for a {@code CallScreeningService}.
+ * <pre>
+ * {@code
+ * <service android:name="your.package.YourCallScreeningServiceImplementation"
+ *          android:permission="android.permission.BIND_SCREENING_SERVICE">
+ *      <intent-filter>
+ *          <action android:name="android.telecom.CallScreeningService"/>
+ *      </intent-filter>
+ * </service>
+ * }
+ * </pre>
+ */
+public abstract class CallScreeningService extends Service {
+    /**
+     * The {@link Intent} that must be declared as handled by the service.
+     */
+    @SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION)
+    public static final String SERVICE_INTERFACE = "android.telecom.CallScreeningService";
+
+    private static final int MSG_SCREEN_CALL = 1;
+
+    private final Handler mHandler = new Handler(Looper.getMainLooper()) {
+        @Override
+        public void handleMessage(Message msg) {
+            switch (msg.what) {
+                case MSG_SCREEN_CALL:
+                    SomeArgs args = (SomeArgs) msg.obj;
+                    try {
+                        mCallScreeningAdapter = (ICallScreeningAdapter) args.arg1;
+                        onScreenCall(
+                                Call.Details.createFromParcelableCall((ParcelableCall) args.arg2));
+                    } finally {
+                        args.recycle();
+                    }
+                    break;
+            }
+        }
+    };
+
+    private final class CallScreeningBinder extends ICallScreeningService.Stub {
+        @Override
+        public void screenCall(ICallScreeningAdapter adapter, ParcelableCall call) {
+            Log.v(this, "screenCall");
+            SomeArgs args = SomeArgs.obtain();
+            args.arg1 = adapter;
+            args.arg2 = call;
+            mHandler.obtainMessage(MSG_SCREEN_CALL, args).sendToTarget();
+        }
+    }
+
+    private ICallScreeningAdapter mCallScreeningAdapter;
+
+    /*
+     * Information about how to respond to an incoming call.
+     */
+    public class CallResponse {
+        private final boolean mShouldDisallowCall;
+        private final boolean mShouldRejectCall;
+        private final boolean mShouldSkipCallLog;
+        private final boolean mShouldSkipNotification;
+
+        private CallResponse(
+                boolean shouldDisallowCall,
+                boolean shouldRejectCall,
+                boolean shouldSkipCallLog,
+                boolean shouldSkipNotification) {
+            if (!shouldDisallowCall
+                    && (shouldRejectCall || shouldSkipCallLog || shouldSkipNotification)) {
+                throw new IllegalStateException("Invalid response state for allowed call.");
+            }
+
+            mShouldDisallowCall = shouldDisallowCall;
+            mShouldRejectCall = shouldRejectCall;
+            mShouldSkipCallLog = shouldSkipCallLog;
+            mShouldSkipNotification = shouldSkipNotification;
+        }
+
+        /*
+         * @return Whether the incoming call should be blocked.
+         */
+        public boolean getDisallowCall() {
+            return mShouldDisallowCall;
+        }
+
+        /*
+         * @return Whether the incoming call should be disconnected as if the user had manually
+         * rejected it.
+         */
+        public boolean getRejectCall() {
+            return mShouldRejectCall;
+        }
+
+        /*
+         * @return Whether the incoming call should not be displayed in the call log.
+         */
+        public boolean getSkipCallLog() {
+            return mShouldSkipCallLog;
+        }
+
+        /*
+         * @return Whether a missed call notification should not be shown for the incoming call.
+         */
+        public boolean getSkipNotification() {
+            return mShouldSkipNotification;
+        }
+
+        public class Builder {
+            private boolean mShouldDisallowCall;
+            private boolean mShouldRejectCall;
+            private boolean mShouldSkipCallLog;
+            private boolean mShouldSkipNotification;
+
+            /*
+             * Sets whether the incoming call should be blocked.
+             */
+            public Builder setDisallowCall(boolean shouldDisallowCall) {
+                mShouldDisallowCall = shouldDisallowCall;
+                return this;
+            }
+
+            /*
+             * Sets whether the incoming call should be disconnected as if the user had manually
+             * rejected it. This property should only be set to true if the call is disallowed.
+             */
+            public Builder setRejectCall(boolean shouldRejectCall) {
+                mShouldRejectCall = shouldRejectCall;
+                return this;
+            }
+
+            /*
+             * Sets whether the incoming call should not be displayed in the call log. This property
+             * should only be set to true if the call is disallowed.
+             */
+            public Builder setSkipCallLog(boolean shouldSkipCallLog) {
+                mShouldSkipCallLog = shouldSkipCallLog;
+                return this;
+            }
+
+            /*
+             * Sets whether a missed call notification should not be shown for the incoming call.
+             * This property should only be set to true if the call is disallowed.
+             */
+            public Builder setSkipNotification(boolean shouldSkipNotification) {
+                mShouldSkipNotification = shouldSkipNotification;
+                return this;
+            }
+
+            public CallResponse build() {
+                return new CallResponse(
+                        mShouldDisallowCall,
+                        mShouldRejectCall,
+                        mShouldSkipCallLog,
+                        mShouldSkipNotification);
+            }
+       }
+    }
+
+    public CallScreeningService() {
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        Log.v(this, "onBind");
+        return new CallScreeningBinder();
+    }
+
+    @Override
+    public boolean onUnbind(Intent intent) {
+        Log.v(this, "onUnbind");
+        return false;
+    }
+
+    /**
+     * Called when a new incoming call is added.
+     * {@link CallScreeningService#respondToCall(Call.Details, CallScreeningService.CallResponse)}
+     * should be called to allow or disallow the call.
+     *
+     * @param callDetails Information about a new incoming call, see {@link Call.Details}.
+     */
+    public abstract void onScreenCall(Call.Details callDetails);
+
+    /**
+     * Responds to the given call, either allowing it or disallowing it.
+     *
+     * @param callDetails The call to allow.
+     * @param response The {@link CallScreeningService.CallResponse} which contains information
+     * about how to respond to a call.
+     */
+    public final void respondToCall(Call.Details callDetails, CallResponse response) {
+        try {
+            if (response.getDisallowCall()) {
+                mCallScreeningAdapter.disallowCall(
+                        callDetails.getTelecomCallId(),
+                        response.getRejectCall(),
+                        !response.getSkipCallLog(),
+                        !response.getSkipNotification());
+            } else {
+                mCallScreeningAdapter.allowCall(callDetails.getTelecomCallId());
+            }
+        } catch (RemoteException e) {
+        }
+    }
+}
diff --git a/telecomm/java/com/android/internal/telecom/ICallScreeningAdapter.aidl b/telecomm/java/com/android/internal/telecom/ICallScreeningAdapter.aidl
new file mode 100644
index 0000000000000..2e0af27907b53
--- /dev/null
+++ b/telecomm/java/com/android/internal/telecom/ICallScreeningAdapter.aidl
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.telecom;
+
+/**
+ * Internal remote callback interface for call screening services.
+ *
+ * @see android.telecom.CallScreeningService
+ *
+ * {@hide}
+ */
+oneway interface ICallScreeningAdapter {
+    void allowCall(String callId);
+
+    void disallowCall(
+            String callId,
+            boolean shouldReject,
+            boolean shouldAddToCallLog,
+            boolean shouldShowNotification);
+}
diff --git a/telecomm/java/com/android/internal/telecom/ICallScreeningService.aidl b/telecomm/java/com/android/internal/telecom/ICallScreeningService.aidl
new file mode 100644
index 0000000000000..c3fe1af6a00b7
--- /dev/null
+++ b/telecomm/java/com/android/internal/telecom/ICallScreeningService.aidl
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.telecom;
+
+import android.telecom.ParcelableCall;
+
+import com.android.internal.telecom.ICallScreeningAdapter;
+
+/**
+ * Internal remote interface for a call screening service.
+ * @see android.telecom.CallScreeningService
+ * @hide
+ */
+oneway interface ICallScreeningService {
+    void screenCall(in ICallScreeningAdapter adapter, in ParcelableCall call);
+}