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Commit b77cf1ab authored by Ruthwar Kumar Ambeer's avatar Ruthwar Kumar Ambeer Committed by Gerrit - the friendly Code Review server
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FR 36773: Emergency Call on Power key Tapping 

Invoke Emergency Call By short pressing the
Power button N times in quick succession.

N is configurable in config resources and the
default value is 3.

Change-Id: I91fa808071f2e30316149cbe4532c00e50df03ec
parent 4404f4a2

core/res/res/values/config.xml

+10 −0
Original line number Diff line number Diff line
@@ -2637,4 +2637,14 @@ 
    <bool name="config_regional_hotspot_show_broadcast_ssid_checkbox">false</bool>

    <bool name="config_regional_hotspot_show_notification_when_turn_on">false</bool>

    <bool name="config_passpoint_setting_on">false</bool>

    <!-- Emergency Number to be invoked when Power key is pressed.

         Default value is set to 112 as this FR is mainly intended

         for Indian market-->

    <string name="power_key_emergency_number">112</string>

    <!-- Number of power key hits to invoke emergency call -->

    <integer name="power_key_hits_emergency">3</integer>



    <!-- Allow the gesture to tap the power button N times to start

         the Emergency Call while the device is non-interactive. -->

    <bool name="config_emergencyCallOnPowerkeyTapGestureEnabled">false</bool>

</resources>

core/res/res/values/symbols.xml

+4 −0
Original line number Diff line number Diff line
@@ -2729,4 +2729,8 @@ 
  <java-symbol type="integer" name="wifi_hotspot_security_type" />

  <java-symbol type="string" name="def_wifi_wifihotspot_pass" />

  <java-symbol type="string" name="def_wifi_direct_name" />



  <java-symbol type="string" name="power_key_emergency_number" />

  <java-symbol type="integer" name="power_key_hits_emergency" />

  <java-symbol type="bool" name="config_emergencyCallOnPowerkeyTapGestureEnabled" />

</resources>

services/core/java/com/android/server/GestureLauncherService.java

+71 −10
Original line number Diff line number Diff line
@@ -28,12 +28,14 @@ import android.hardware.Sensor; 
import android.hardware.SensorEvent;

import android.hardware.SensorEventListener;

import android.hardware.SensorManager;

import android.net.Uri;

import android.os.Handler;

import android.os.PowerManager;

import android.os.PowerManager.WakeLock;

import android.os.SystemClock;

import android.os.SystemProperties;

import android.provider.Settings;

import android.text.TextUtils;

import android.util.MutableBoolean;

import android.util.Slog;

import android.view.KeyEvent;
@@ -42,6 +44,8 @@ import com.android.internal.logging.MetricsLogger; 
import com.android.internal.logging.MetricsProto.MetricsEvent;

import com.android.server.statusbar.StatusBarManagerInternal;



import java.util.Arrays;



/**

 * The service that listens for gestures detected in sensor firmware and starts the intent

 * accordingly.
@@ -106,6 +110,20 @@ public class GestureLauncherService extends SystemService { 
    private boolean mCameraDoubleTapPowerEnabled;

    private long mLastPowerDown;



     /**

     * Whether EmergencyCall on power button tap gesture is currently enabled;

     */

    private boolean mIsEmergencyOnPowerKeyTapEnabled;

    private long[] mHits;

    private long mDuration;

    private String mEmergencyNumber;



    /**

    * Time in milliseconds in which interval power tap must be pressed to make

    * an emergency call.

    */

    private static final long EMERGENCY_CALL_POWER_KEY_TAP_INTERVAL = 400;



    public GestureLauncherService(Context context) {

        super(context);

        mContext = context;
@@ -129,7 +147,7 @@ public class GestureLauncherService extends SystemService { 
                    "GestureLauncherService");

            updateCameraRegistered();

            updateCameraDoubleTapPowerEnabled();



            updateEmergencyCallTapPowerEnabled();

            mUserId = ActivityManager.getCurrentUser();

            mContext.registerReceiver(mUserReceiver, new IntentFilter(Intent.ACTION_USER_SWITCHED));

            registerContentObservers();
@@ -244,11 +262,33 @@ public class GestureLauncherService extends SystemService { 
                com.android.internal.R.bool.config_cameraDoubleTapPowerGestureEnabled);

    }



    public static boolean isEmergencyOnpowerButtonTapEnabled(Resources resources) {

        return SystemProperties.getBoolean(

                "persist.sys.ecall_pwr_key_press", false) ||

                resources.getBoolean(

                com.android.internal.R.bool.config_emergencyCallOnPowerkeyTapGestureEnabled);

    }



    /**

     * Whether GestureLauncherService should be enabled according to system properties.

     */

    public static boolean isGestureLauncherEnabled(Resources resources) {

        return isCameraLaunchEnabled(resources) || isCameraDoubleTapPowerEnabled(resources);

        return isCameraLaunchEnabled(resources) || isCameraDoubleTapPowerEnabled(resources) ||

                isEmergencyOnpowerButtonTapEnabled(resources);

    }



    private void updateEmergencyCallTapPowerEnabled() {

        Resources resources = mContext.getResources();

        mIsEmergencyOnPowerKeyTapEnabled =

                isEmergencyOnpowerButtonTapEnabled(resources);

        mEmergencyNumber = resources.getString(

                com.android.internal.R.string.power_key_emergency_number);

        int hits = resources.getInteger(

                com.android.internal.R.integer.power_key_hits_emergency);

        mDuration = hits * EMERGENCY_CALL_POWER_KEY_TAP_INTERVAL;

        mHits = new long[hits];

        Slog.d(TAG, "Gesture launcher mEmergencyNumber = " +

                mEmergencyNumber + " hits = " + hits);

    }



    public boolean interceptPowerKeyDown(KeyEvent event, boolean interactive,
@@ -258,7 +298,19 @@ public class GestureLauncherService extends SystemService { 
        long doubleTapInterval;

        synchronized (this) {

            doubleTapInterval = event.getEventTime() - mLastPowerDown;

            if (mCameraDoubleTapPowerEnabled

            if (mIsEmergencyOnPowerKeyTapEnabled) {

                System.arraycopy(mHits, 1, mHits, 0, mHits.length-1);

                mHits[mHits.length-1] = SystemClock.uptimeMillis();

                for (int i = 0 ; i < mHits.length ; i++) {

                    Slog.i(TAG, "mHits[" + i + "] = " + mHits[i] + "ms");

                }

                if (mHits[0] >=

                        (SystemClock.uptimeMillis()-mDuration)) {

                     launched = true;

                     intercept = interactive;

                     Arrays.fill(mHits,0);

                }

            } else if (mCameraDoubleTapPowerEnabled

                    && doubleTapInterval < CAMERA_POWER_DOUBLE_TAP_MAX_TIME_MS) {

                launched = true;

                intercept = interactive;
@@ -266,15 +318,24 @@ public class GestureLauncherService extends SystemService { 
            mLastPowerDown = event.getEventTime();

        }

        if (launched) {

            if (mIsEmergencyOnPowerKeyTapEnabled &&

                    !TextUtils.isEmpty(mEmergencyNumber)) {

                Slog.i(TAG, "Power button Triple tap gesture detected, launching Emergency Call");

                Intent intent = new Intent(Intent.ACTION_CALL_PRIVILEGED,

                        Uri.fromParts("tel", mEmergencyNumber, null));

                getContext().startActivity(intent);

            } else {

                Slog.i(TAG, "Power button double tap gesture detected, launching camera. Interval="

                        + doubleTapInterval + "ms");

                launched = handleCameraLaunchGesture(false /* useWakelock */,

                        StatusBarManager.CAMERA_LAUNCH_SOURCE_POWER_DOUBLE_TAP);

                if (launched) {

                MetricsLogger.action(mContext, MetricsEvent.ACTION_DOUBLE_TAP_POWER_CAMERA_GESTURE,

                    MetricsLogger.action(mContext,

                            MetricsEvent.ACTION_DOUBLE_TAP_POWER_CAMERA_GESTURE,

                            (int) doubleTapInterval);

                }

            }

        }

        MetricsLogger.histogram(mContext, "power_double_tap_interval", (int) doubleTapInterval);

        outLaunched.value = launched;

        return intercept && launched;