diff --git a/libs/gui/IConsumerListener.cpp b/libs/gui/IConsumerListener.cpp
index cab7dc3..9a0b7a4 100644
--- a/libs/gui/IConsumerListener.cpp
+++ b/libs/gui/IConsumerListener.cpp
@@ -36,7 +36,7 @@
 class BpConsumerListener : public BpInterface<IConsumerListener>
 {
 public:
-    BpConsumerListener(const sp<IBinder>& impl)
+    explicit BpConsumerListener(const sp<IBinder>& impl)
         : BpInterface<IConsumerListener>(impl) {
     }
 
diff --git a/libs/gui/IDisplayEventConnection.cpp b/libs/gui/IDisplayEventConnection.cpp
index 9890f44..b1d3b00 100644
--- a/libs/gui/IDisplayEventConnection.cpp
+++ b/libs/gui/IDisplayEventConnection.cpp
@@ -39,7 +39,7 @@
 class BpDisplayEventConnection : public BpInterface<IDisplayEventConnection>
 {
 public:
-    BpDisplayEventConnection(const sp<IBinder>& impl)
+    explicit BpDisplayEventConnection(const sp<IBinder>& impl)
         : BpInterface<IDisplayEventConnection>(impl)
     {
     }
diff --git a/libs/gui/IGraphicBufferAlloc.cpp b/libs/gui/IGraphicBufferAlloc.cpp
index 3009989..d4d4702 100644
--- a/libs/gui/IGraphicBufferAlloc.cpp
+++ b/libs/gui/IGraphicBufferAlloc.cpp
@@ -37,7 +37,7 @@
 class BpGraphicBufferAlloc : public BpInterface<IGraphicBufferAlloc>
 {
 public:
-    BpGraphicBufferAlloc(const sp<IBinder>& impl)
+    explicit BpGraphicBufferAlloc(const sp<IBinder>& impl)
         : BpInterface<IGraphicBufferAlloc>(impl)
     {
     }
@@ -90,7 +90,7 @@
     class BufferReference : public BBinder {
         sp<GraphicBuffer> mBuffer;
     public:
-        BufferReference(const sp<GraphicBuffer>& buffer) : mBuffer(buffer) {}
+        explicit BufferReference(const sp<GraphicBuffer>& buffer) : mBuffer(buffer) {}
     };
 
 
diff --git a/libs/gui/IGraphicBufferConsumer.cpp b/libs/gui/IGraphicBufferConsumer.cpp
index c4660ba..334611d 100644
--- a/libs/gui/IGraphicBufferConsumer.cpp
+++ b/libs/gui/IGraphicBufferConsumer.cpp
@@ -59,7 +59,7 @@
 class BpGraphicBufferConsumer : public BpInterface<IGraphicBufferConsumer>
 {
 public:
-    BpGraphicBufferConsumer(const sp<IBinder>& impl)
+    explicit BpGraphicBufferConsumer(const sp<IBinder>& impl)
         : BpInterface<IGraphicBufferConsumer>(impl)
     {
     }
diff --git a/libs/gui/IGraphicBufferProducer.cpp b/libs/gui/IGraphicBufferProducer.cpp
index 1099c84..e91a8e1 100644
--- a/libs/gui/IGraphicBufferProducer.cpp
+++ b/libs/gui/IGraphicBufferProducer.cpp
@@ -54,7 +54,7 @@
 class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
 {
 public:
-    BpGraphicBufferProducer(const sp<IBinder>& impl)
+    explicit BpGraphicBufferProducer(const sp<IBinder>& impl)
         : BpInterface<IGraphicBufferProducer>(impl)
     {
     }
diff --git a/libs/gui/IProducerListener.cpp b/libs/gui/IProducerListener.cpp
index 81adc95..9d18ea2 100644
--- a/libs/gui/IProducerListener.cpp
+++ b/libs/gui/IProducerListener.cpp
@@ -27,7 +27,7 @@
 class BpProducerListener : public BpInterface<IProducerListener>
 {
 public:
-    BpProducerListener(const sp<IBinder>& impl)
+    explicit BpProducerListener(const sp<IBinder>& impl)
         : BpInterface<IProducerListener>(impl) {}
 
     virtual ~BpProducerListener();
diff --git a/libs/gui/ISensorEventConnection.cpp b/libs/gui/ISensorEventConnection.cpp
index dc7a35c..59ecee7 100644
--- a/libs/gui/ISensorEventConnection.cpp
+++ b/libs/gui/ISensorEventConnection.cpp
@@ -40,7 +40,7 @@
 class BpSensorEventConnection : public BpInterface<ISensorEventConnection>
 {
 public:
-    BpSensorEventConnection(const sp<IBinder>& impl)
+    explicit BpSensorEventConnection(const sp<IBinder>& impl)
         : BpInterface<ISensorEventConnection>(impl)
     {
     }
diff --git a/libs/gui/ISensorServer.cpp b/libs/gui/ISensorServer.cpp
index f581b5c..b0ba134 100644
--- a/libs/gui/ISensorServer.cpp
+++ b/libs/gui/ISensorServer.cpp
@@ -41,7 +41,7 @@
 class BpSensorServer : public BpInterface<ISensorServer>
 {
 public:
-    BpSensorServer(const sp<IBinder>& impl)
+    explicit BpSensorServer(const sp<IBinder>& impl)
         : BpInterface<ISensorServer>(impl)
     {
     }
diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index 78886d5..9bfc906 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -46,7 +46,7 @@
 class BpSurfaceComposer : public BpInterface<ISurfaceComposer>
 {
 public:
-    BpSurfaceComposer(const sp<IBinder>& impl)
+    explicit BpSurfaceComposer(const sp<IBinder>& impl)
         : BpInterface<ISurfaceComposer>(impl)
     {
     }
diff --git a/libs/gui/ISurfaceComposerClient.cpp b/libs/gui/ISurfaceComposerClient.cpp
index 2ecb908..decffbf 100644
--- a/libs/gui/ISurfaceComposerClient.cpp
+++ b/libs/gui/ISurfaceComposerClient.cpp
@@ -47,7 +47,7 @@
 class BpSurfaceComposerClient : public BpInterface<ISurfaceComposerClient>
 {
 public:
-    BpSurfaceComposerClient(const sp<IBinder>& impl)
+    explicit BpSurfaceComposerClient(const sp<IBinder>& impl)
         : BpInterface<ISurfaceComposerClient>(impl) {
     }
 
diff --git a/libs/gui/SensorManager.cpp b/libs/gui/SensorManager.cpp
index 33608b5..9b9e78f 100644
--- a/libs/gui/SensorManager.cpp
+++ b/libs/gui/SensorManager.cpp
@@ -142,7 +142,7 @@
                 mSensorManger.sensorManagerDied();
             }
         public:
-            DeathObserver(SensorManager& mgr) : mSensorManger(mgr) { }
+            explicit DeathObserver(SensorManager& mgr) : mSensorManger(mgr) { }
         };
 
         LOG_ALWAYS_FATAL_IF(mSensorServer.get() == NULL, "getService(SensorService) NULL");
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 6ad47d8..5863798 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -67,7 +67,7 @@
             mComposerService.composerServiceDied();
         }
      public:
-        DeathObserver(ComposerService& mgr) : mComposerService(mgr) { }
+        explicit DeathObserver(ComposerService& mgr) : mComposerService(mgr) { }
     };
 
     mDeathObserver = new DeathObserver(*const_cast<ComposerService*>(this));