Merge "Add hotword detection in insecure keyguard" into klp-dev

5 files changed, 403 insertions, 3 deletions

diff --git a/packages/Keyguard/AndroidManifest.xml b/packages/Keyguard/AndroidManifest.xml
index 7d77c48..f3106da 100644
--- a/packages/Keyguard/AndroidManifest.xml
+++ b/packages/Keyguard/AndroidManifest.xml
@@ -38,6 +38,9 @@
     <uses-permission android:name="android.permission.BIND_DEVICE_ADMIN" />
     <uses-permission android:name="android.permission.CHANGE_COMPONENT_ENABLED_STATE" />
 
+    <!-- Permission for the Hotword detector service -->
+    <uses-permission android:name="com.google.android.googlequicksearchbox.SEARCH_API" />
+
     <application android:label="@string/app_name"
         android:process="com.android.systemui"
         android:persistent="true" >
diff --git a/packages/Keyguard/src/com/android/keyguard/HotwordServiceClient.java b/packages/Keyguard/src/com/android/keyguard/HotwordServiceClient.java
new file mode 100644
index 0000000..94733d4
--- /dev/null
+++ b/packages/Keyguard/src/com/android/keyguard/HotwordServiceClient.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2013 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.keyguard;
+
+import android.app.SearchManager;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Message;
+import android.os.RemoteException;
+import android.os.UserHandle;
+import android.util.Log;
+
+import com.google.android.search.service.IHotwordService;
+import com.google.android.search.service.IHotwordServiceCallback;
+
+/**
+ * Utility class with its callbacks to simplify usage of {@link IHotwordService}.
+ *
+ * The client is meant to be used for a single hotword detection in a session.
+ * start() -> stop(); client is asked to stop & disconnect from the service.
+ * start() -> onHotwordDetected(); client disconnects from the service automatically.
+ */
+public class HotwordServiceClient implements Handler.Callback {
+    private static final String TAG = "HotwordServiceClient";
+    private static final boolean DBG = true;
+    private static final String ACTION_HOTWORD =
+            "com.google.android.search.service.IHotwordService";
+
+    private static final int MSG_SERVICE_CONNECTED = 0;
+    private static final int MSG_SERVICE_DISCONNECTED = 1;
+    private static final int MSG_HOTWORD_STARTED = 2;
+    private static final int MSG_HOTWORD_STOPPED = 3;
+    private static final int MSG_HOTWORD_DETECTED = 4;
+
+    private final Context mContext;
+    private final Callback mClientCallback;
+    private final Handler mHandler;
+
+    private IHotwordService mService;
+
+    public HotwordServiceClient(Context context, Callback callback) {
+        mContext = context;
+        mClientCallback = callback;
+        mHandler = new Handler(this);
+    }
+
+    public interface Callback {
+        void onServiceConnected();
+        void onServiceDisconnected();
+        void onHotwordDetectionStarted();
+        void onHotwordDetectionStopped();
+        void onHotwordDetected(String action);
+    }
+
+    /**
+     * Binds to the {@link IHotwordService} and starts hotword detection
+     * when the service is connected.
+     *
+     * @return false if the service can't be bound to.
+     */
+    public synchronized boolean start() {
+        if (mService != null) {
+            if (DBG) Log.d(TAG, "Multiple call to start(), service was already bound");
+            return true;
+        } else {
+            // TODO: The hotword service is currently hosted within the search app
+            // so the component handling the assist intent should handle hotwording
+            // as well.
+            final Intent intent =
+                    ((SearchManager) mContext.getSystemService(Context.SEARCH_SERVICE))
+                            .getAssistIntent(mContext, true, UserHandle.USER_CURRENT);
+            if (intent == null) {
+                return false;
+            }
+
+            Intent hotwordIntent = new Intent(ACTION_HOTWORD);
+            hotwordIntent.fillIn(intent, Intent.FILL_IN_PACKAGE);
+            return mContext.bindService(
+                    hotwordIntent,
+                   mConnection,
+                   Context.BIND_AUTO_CREATE);
+        }
+    }
+
+    /**
+     * Unbinds from the the {@link IHotwordService}.
+     */
+    public synchronized void stop() {
+        if (mService != null) {
+            mContext.unbindService(mConnection);
+            mService = null;
+        }
+    }
+
+    @Override
+    public boolean handleMessage(Message msg) {
+        switch (msg.what) {
+            case MSG_SERVICE_CONNECTED:
+                handleServiceConnected();
+                break;
+            case MSG_SERVICE_DISCONNECTED:
+                handleServiceDisconnected();
+                break;
+            case MSG_HOTWORD_STARTED:
+                handleHotwordDetectionStarted();
+                break;
+            case MSG_HOTWORD_STOPPED:
+                handleHotwordDetectionStopped();
+                break;
+            case MSG_HOTWORD_DETECTED:
+                handleHotwordDetected((String) msg.obj);
+                break;
+            default:
+                if (DBG) Log.e(TAG, "Unhandled message");
+                return false;
+        }
+        return true;
+    }
+
+    private void handleServiceConnected() {
+        if (DBG) Log.d(TAG, "handleServiceConnected()");
+        if (mClientCallback != null) mClientCallback.onServiceConnected();
+        try {
+            mService.requestHotwordDetection(mServiceCallback);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Exception while registering callback", e);
+            mHandler.sendEmptyMessage(MSG_SERVICE_DISCONNECTED);
+        }
+    }
+
+    private void handleServiceDisconnected() {
+        if (DBG) Log.d(TAG, "handleServiceDisconnected()");
+        mService = null;
+        if (mClientCallback != null) mClientCallback.onServiceDisconnected();
+    }
+
+    private void handleHotwordDetectionStarted() {
+        if (DBG) Log.d(TAG, "handleHotwordDetectionStarted()");
+        if (mClientCallback != null) mClientCallback.onHotwordDetectionStarted();
+    }
+
+    private void handleHotwordDetectionStopped() {
+        if (DBG) Log.d(TAG, "handleHotwordDetectionStopped()");
+        if (mClientCallback != null) mClientCallback.onHotwordDetectionStopped();
+    }
+
+    void handleHotwordDetected(final String action) {
+        if (DBG) Log.d(TAG, "handleHotwordDetected()");
+        if (mClientCallback != null) mClientCallback.onHotwordDetected(action);
+        stop();
+    }
+
+    /**
+     * Implements service connection methods.
+     */
+    private ServiceConnection mConnection = new ServiceConnection() {
+        /**
+         * Called when the service connects after calling bind().
+         */
+        public void onServiceConnected(ComponentName className, IBinder iservice) {
+            mService = IHotwordService.Stub.asInterface(iservice);
+            mHandler.sendEmptyMessage(MSG_SERVICE_CONNECTED);
+        }
+
+        /**
+         * Called if the service unexpectedly disconnects. This indicates an error.
+         */
+        public void onServiceDisconnected(ComponentName className) {
+            mService = null;
+            mHandler.sendEmptyMessage(MSG_SERVICE_DISCONNECTED);
+        }
+    };
+
+    /**
+     * Implements the AIDL IHotwordServiceCallback interface.
+     */
+    private final IHotwordServiceCallback mServiceCallback = new IHotwordServiceCallback.Stub() {
+
+        public void onHotwordDetectionStarted() {
+            mHandler.sendEmptyMessage(MSG_HOTWORD_STARTED);
+        }
+
+        public void onHotwordDetectionStopped() {
+            mHandler.sendEmptyMessage(MSG_HOTWORD_STOPPED);
+        }
+
+        public void onHotwordDetected(String action) {
+            mHandler.obtainMessage(MSG_HOTWORD_DETECTED, action).sendToTarget();
+        }
+    };
+}
diff --git a/packages/Keyguard/src/com/android/keyguard/KeyguardSelectorView.java b/packages/Keyguard/src/com/android/keyguard/KeyguardSelectorView.java
index 4d891be..1c658e3 100644
--- a/packages/Keyguard/src/com/android/keyguard/KeyguardSelectorView.java
+++ b/packages/Keyguard/src/com/android/keyguard/KeyguardSelectorView.java
@@ -22,8 +22,11 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
+import android.os.PowerManager;
 import android.os.UserHandle;
 import android.provider.Settings;
+import android.telephony.TelephonyManager;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.Slog;
@@ -34,12 +37,15 @@ import com.android.internal.telephony.IccCardConstants.State;
 import com.android.internal.widget.LockPatternUtils;
 import com.android.internal.widget.multiwaveview.GlowPadView;
 import com.android.internal.widget.multiwaveview.GlowPadView.OnTriggerListener;
+import com.android.keyguard.KeyguardHostView.OnDismissAction;
 
 public class KeyguardSelectorView extends LinearLayout implements KeyguardSecurityView {
     private static final boolean DEBUG = KeyguardHostView.DEBUG;
     private static final String TAG = "SecuritySelectorView";
     private static final String ASSIST_ICON_METADATA_NAME =
         "com.android.systemui.action_assist_icon";
+    // Flag to enable/disable hotword detection on lock screen.
+    private static final boolean FLAG_HOTWORD = true;
 
     private KeyguardSecurityCallback mCallback;
     private GlowPadView mGlowPadView;
@@ -51,11 +57,15 @@ public class KeyguardSelectorView extends LinearLayout implements KeyguardSecuri
     private LockPatternUtils mLockPatternUtils;
     private SecurityMessageDisplay mSecurityMessageDisplay;
     private Drawable mBouncerFrame;
+    private HotwordServiceClient mHotwordClient;
 
     OnTriggerListener mOnTriggerListener = new OnTriggerListener() {
 
         public void onTrigger(View v, int target) {
             final int resId = mGlowPadView.getResourceIdForTarget(target);
+            if (FLAG_HOTWORD) {
+                maybeStopHotwordDetector();
+            }
             switch (resId) {
                 case R.drawable.ic_action_assist_generic:
                     Intent assistIntent =
@@ -103,7 +113,7 @@ public class KeyguardSelectorView extends LinearLayout implements KeyguardSecuri
 
     };
 
-    KeyguardUpdateMonitorCallback mInfoCallback = new KeyguardUpdateMonitorCallback() {
+    KeyguardUpdateMonitorCallback mUpdateCallback = new KeyguardUpdateMonitorCallback() {
 
         @Override
         public void onDevicePolicyManagerStateChanged() {
@@ -114,6 +124,24 @@ public class KeyguardSelectorView extends LinearLayout implements KeyguardSecuri
         public void onSimStateChanged(State simState) {
             updateTargets();
         }
+
+        @Override
+        public void onPhoneStateChanged(int phoneState) {
+            if (FLAG_HOTWORD) {
+                // We need to stop the hotwording when a phone call comes in
+                // TODO(sansid): This is not really needed if onPause triggers
+                // when we navigate away from the keyguard
+                if (phoneState == TelephonyManager.CALL_STATE_RINGING) {
+                    if (DEBUG) Log.d(TAG, "Stopping due to CALL_STATE_RINGING");
+                    maybeStopHotwordDetector();
+                }
+            }
+        }
+
+        @Override
+        public void onUserSwitching(int userId) {
+            maybeStopHotwordDetector();
+        }
     };
 
     private final KeyguardActivityLauncher mActivityLauncher = new KeyguardActivityLauncher() {
@@ -152,6 +180,9 @@ public class KeyguardSelectorView extends LinearLayout implements KeyguardSecuri
         mSecurityMessageDisplay = new KeyguardMessageArea.Helper(this);
         View bouncerFrameView = findViewById(R.id.keyguard_selector_view_frame);
         mBouncerFrame = bouncerFrameView.getBackground();
+        if (FLAG_HOTWORD) {
+            mHotwordClient = new HotwordServiceClient(getContext(), mHotwordCallback);
+        }
     }
 
     public void setCarrierArea(View carrierArea) {
@@ -254,12 +285,22 @@ public class KeyguardSelectorView extends LinearLayout implements KeyguardSecuri
 
     @Override
     public void onPause() {
-        KeyguardUpdateMonitor.getInstance(getContext()).removeCallback(mInfoCallback);
+        KeyguardUpdateMonitor.getInstance(getContext()).removeCallback(mUpdateCallback);
     }
 
     @Override
     public void onResume(int reason) {
-        KeyguardUpdateMonitor.getInstance(getContext()).registerCallback(mInfoCallback);
+        KeyguardUpdateMonitor.getInstance(getContext()).registerCallback(mUpdateCallback);
+        // TODO: Figure out if there's a better way to do it.
+        // Right now we don't get onPause at all, and onResume gets called
+        // multiple times (even when the screen is turned off with VIEW_REVEALED)
+        if (reason == SCREEN_ON) {
+            if (!KeyguardUpdateMonitor.getInstance(getContext()).isSwitchingUser()) {
+                maybeStartHotwordDetector();
+            }
+        } else {
+            maybeStopHotwordDetector();
+        }
     }
 
     @Override
@@ -280,4 +321,83 @@ public class KeyguardSelectorView extends LinearLayout implements KeyguardSecuri
         KeyguardSecurityViewHelper.
                 hideBouncer(mSecurityMessageDisplay, mFadeView, mBouncerFrame, duration);
     }
+
+    /**
+     * Start the hotword detector if:
+     * <li> HOTWORDING_ENABLED is true and
+     * <li> HotwordUnlock is initialized and
+     * <li> TelephonyManager is in CALL_STATE_IDLE
+     *
+     * If this method is called when the screen is off,
+     * it attempts to stop hotwording if it's running.
+     */
+    private void maybeStartHotwordDetector() {
+        if (FLAG_HOTWORD) {
+            if (DEBUG) Log.d(TAG, "maybeStartHotwordDetector()");
+            // Don't start it if the screen is off or not showing
+            PowerManager powerManager = (PowerManager) getContext().getSystemService(
+                    Context.POWER_SERVICE);
+            if (!powerManager.isScreenOn()) {
+                if (DEBUG) Log.d(TAG, "screen was off, not starting");
+                return;
+            }
+
+            KeyguardUpdateMonitor monitor = KeyguardUpdateMonitor.getInstance(getContext());
+            if (monitor.getPhoneState() != TelephonyManager.CALL_STATE_IDLE) {
+                if (DEBUG) Log.d(TAG, "Call underway, not starting");
+                return;
+            }
+            if (!mHotwordClient.start()) {
+                Log.w(TAG, "Failed to start the hotword detector");
+            }
+        }
+    }
+
+    /**
+     * Stop hotword detector if HOTWORDING_ENABLED is true.
+     */
+    private void maybeStopHotwordDetector() {
+        if (FLAG_HOTWORD) {
+            if (DEBUG) Log.d(TAG, "maybeStopHotwordDetector()");
+            mHotwordClient.stop();
+        }
+    }
+
+    private final HotwordServiceClient.Callback mHotwordCallback =
+            new HotwordServiceClient.Callback() {
+        private static final String TAG = "HotwordServiceClient.Callback";
+
+        @Override
+        public void onServiceConnected() {
+            if (DEBUG) Log.d(TAG, "onServiceConnected()");
+        }
+
+        @Override
+        public void onServiceDisconnected() {
+            if (DEBUG) Log.d(TAG, "onServiceDisconnected()");
+        }
+
+        @Override
+        public void onHotwordDetectionStarted() {
+            if (DEBUG) Log.d(TAG, "onHotwordDetectionStarted()");
+            // TODO: Change the usage of SecurityMessageDisplay to a better visual indication.
+            mSecurityMessageDisplay.setMessage("\"Ok Google...\"", true);
+        }
+
+        @Override
+        public void onHotwordDetectionStopped() {
+            if (DEBUG) Log.d(TAG, "onHotwordDetectionStopped()");
+            // TODO: Change the usage of SecurityMessageDisplay to a better visual indication.
+        }
+
+        @Override
+        public void onHotwordDetected(String action) {
+            if (DEBUG) Log.d(TAG, "onHotwordDetected(" + action + ")");
+            if (action != null) {
+                Intent intent = new Intent(action);
+                mActivityLauncher.launchActivity(intent, true, true, null, null);
+            }
+            mCallback.userActivity(0);
+        }
+    };
 }
diff --git a/packages/Keyguard/src/com/google/android/search/service/IHotwordService.aidl b/packages/Keyguard/src/com/google/android/search/service/IHotwordService.aidl
new file mode 100644
index 0000000..e053d7d
--- /dev/null
+++ b/packages/Keyguard/src/com/google/android/search/service/IHotwordService.aidl
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2013 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.google.android.search.service;
+
+import com.google.android.search.service.IHotwordServiceCallback;
+
+/**
+ * Interface exposing hotword detector as a service.
+ */
+oneway interface IHotwordService {
+
+    /**
+     * Indicates a desire to start hotword detection.
+     * It's best-effort and the client should rely on
+     * the callbacks to figure out if hotwording was actually
+     * started or not.
+     *
+     * @param a callback to notify of hotword events.
+     */
+    void requestHotwordDetection(in IHotwordServiceCallback callback);
+}
diff --git a/packages/Keyguard/src/com/google/android/search/service/IHotwordServiceCallback.aidl b/packages/Keyguard/src/com/google/android/search/service/IHotwordServiceCallback.aidl
new file mode 100644
index 0000000..7b3765f
--- /dev/null
+++ b/packages/Keyguard/src/com/google/android/search/service/IHotwordServiceCallback.aidl
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2013 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.google.android.search.service;
+
+/**
+ * Interface implemented by users of Hotword service to get callbacks
+ * for hotword events.
+ */
+oneway interface IHotwordServiceCallback {
+
+    /** Hotword detection start/stop callbacks */
+    void onHotwordDetectionStarted();
+    void onHotwordDetectionStopped();
+
+    /**
+     * Called back when hotword is detected.
+     * The action tells the client what action to take, post hotword-detection.
+     */
+    void onHotwordDetected(in String action);
+}