1 files changed, 18 insertions, 0 deletions
diff --git a/core/java/android/hardware/SensorManager.java b/core/java/android/hardware/SensorManager.java
index 3981f27..e232c2c 100644
--- a/core/java/android/hardware/SensorManager.java
+++ b/core/java/android/hardware/SensorManager.java
@@ -620,6 +620,9 @@ public class SensorManager extends IRotationWatcher.Stub
      */
     @Deprecated
     public boolean registerListener(SensorListener listener, int sensors, int rate) {
+        if (listener == null) {
+            return false;
+        }
         boolean result = false;
         result = registerLegacyListener(SENSOR_ACCELEROMETER, Sensor.TYPE_ACCELEROMETER,
                 listener, sensors, rate) || result;
@@ -638,6 +641,9 @@ public class SensorManager extends IRotationWatcher.Stub
     private boolean registerLegacyListener(int legacyType, int type,
             SensorListener listener, int sensors, int rate)
     {
+        if (listener == null) {
+            return false;
+        }
         boolean result = false;
         // Are we activating this legacy sensor?
         if ((sensors & legacyType) != 0) {
@@ -693,6 +699,9 @@ public class SensorManager extends IRotationWatcher.Stub
     private void unregisterLegacyListener(int legacyType, int type,
             SensorListener listener, int sensors)
     {
+        if (listener == null) {
+            return;
+        }
         // do we know about this listener?
         LegacyListener legacyListener = null;
         synchronized (mLegacyListenersMap) {
@@ -800,6 +809,9 @@ public class SensorManager extends IRotationWatcher.Stub
      */
     public boolean registerListener(SensorEventListener listener, Sensor sensor, int rate,
             Handler handler) {
+        if (listener == null || sensor == null) {
+            return false;
+        }
         boolean result;
         int delay = -1;
         switch (rate) {
@@ -856,6 +868,9 @@ public class SensorManager extends IRotationWatcher.Stub
     }
 
     private void unregisterListener(Object listener, Sensor sensor) {
+        if (listener == null || sensor == null) {
+            return;
+        }
         try {
             synchronized (sListeners) {
                 final int size = sListeners.size();
@@ -881,6 +896,9 @@ public class SensorManager extends IRotationWatcher.Stub
     }
 
     private void unregisterListener(Object listener) {
+        if (listener == null) {
+            return;
+        }
         try {
             synchronized (sListeners) {
                 final int size = sListeners.size();