commit 319a34ae87def49d503c19b24d3e00a8f7442809
author Tyler Freeman <fuego@google.com> Thu May 04 17:23:35 2017 -0700
committer Tyler Freeman <fuego@google.com> Tue Jun 06 18:12:50 2017 -0700
tree 1754fa8632306db17b4650eb4267f2b433ede005
parent d0ba2cd40b64c8e18d1391397d938c045f500fd0

Vibrator: Allow priority vibrations in low-power mode for accessibility.

This is mainly for Wear devices that don't have speakers.

Bug: 37543478

Test: Manual:
1. Activate low power mode `adb shell dumpsys battery unplug && adb shell settings put global low_power 1`
2. Then see if Alarm/Timer will vibrate.
3. Send a Hangout Test notification, make sure it does NOT vibrate.

On phones there should be no change. Alarms will not vibrate.

Change-Id: Ia6dffa7e528886e7c84390dbb33b44f298c7afa4

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

diff --git a/services/core/java/com/android/server/VibratorService.java b/services/core/java/com/android/server/VibratorService.java
index 03e9dd2..16e63b3 100644
--- a/services/core/java/com/android/server/VibratorService.java
+++ b/services/core/java/com/android/server/VibratorService.java
@@ -73,6 +73,7 @@
 
     private final LinkedList<VibrationInfo> mPreviousVibrations;
     private final int mPreviousVibrationsLimit;
+    private final boolean mAllowPriorityVibrationsInLowPowerMode;
     private final boolean mSupportsAmplitudeControl;
     private final int mDefaultVibrationAmplitude;
     private final VibrationEffect[] mFallbackEffects;
@@ -213,6 +214,9 @@
         mDefaultVibrationAmplitude = mContext.getResources().getInteger(
                 com.android.internal.R.integer.config_defaultVibrationAmplitude);
 
+        mAllowPriorityVibrationsInLowPowerMode = mContext.getResources().getBoolean(
+                com.android.internal.R.bool.config_allowPriorityVibrationsInLowPowerMode);
+
         mPreviousVibrations = new LinkedList<>();
 
         IntentFilter filter = new IntentFilter();
@@ -456,7 +460,7 @@
     }
 
     private void startVibrationLocked(final Vibration vib) {
-        if (mLowPowerMode && vib.mUsageHint != AudioAttributes.USAGE_NOTIFICATION_RINGTONE) {
+        if (!isAllowedToVibrate(vib)) {
             if (DEBUG) {
                 Slog.e(TAG, "Vibrate ignored, low power mode");
             }
@@ -505,6 +509,26 @@
         }
     }
 
+    private boolean isAllowedToVibrate(Vibration vib) {
+        if (!mLowPowerMode) {
+            return true;
+        }
+        if (vib.mUsageHint == AudioAttributes.USAGE_NOTIFICATION_RINGTONE) {
+            return true;
+        }
+        if (!mAllowPriorityVibrationsInLowPowerMode) {
+            return false;
+        }
+        if (vib.mUsageHint == AudioAttributes.USAGE_ALARM ||
+            vib.mUsageHint == AudioAttributes.USAGE_ASSISTANCE_ACCESSIBILITY ||
+            vib.mUsageHint == AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_REQUEST) {
+
+            return true;
+        }
+
+        return false;
+    }
+
     private boolean shouldVibrateForRingtone() {
         AudioManager audioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
         int ringerMode = audioManager.getRingerModeInternal();