diff --git a/libs/binder/IMediaResourceMonitor.cpp b/libs/binder/IMediaResourceMonitor.cpp
index 4800f5b..77e3d23 100644
--- a/libs/binder/IMediaResourceMonitor.cpp
+++ b/libs/binder/IMediaResourceMonitor.cpp
@@ -25,7 +25,7 @@
 
 class BpMediaResourceMonitor : public BpInterface<IMediaResourceMonitor> {
 public:
-    BpMediaResourceMonitor(const sp<IBinder>& impl)
+    explicit BpMediaResourceMonitor(const sp<IBinder>& impl)
         : BpInterface<IMediaResourceMonitor>(impl) {}
 
     virtual void notifyResourceGranted(/*in*/ int32_t pid, /*in*/ const int32_t type)
diff --git a/libs/binder/IResultReceiver.cpp b/libs/binder/IResultReceiver.cpp
index 2a22b69..646809e 100644
--- a/libs/binder/IResultReceiver.cpp
+++ b/libs/binder/IResultReceiver.cpp
@@ -31,7 +31,7 @@
 class BpResultReceiver : public BpInterface<IResultReceiver>
 {
 public:
-    BpResultReceiver(const sp<IBinder>& impl)
+    explicit BpResultReceiver(const sp<IBinder>& impl)
         : BpInterface<IResultReceiver>(impl)
     {
     }
diff --git a/services/surfaceflinger/DispSync.cpp b/services/surfaceflinger/DispSync.cpp
index 37b6420..d438f2c 100644
--- a/services/surfaceflinger/DispSync.cpp
+++ b/services/surfaceflinger/DispSync.cpp
@@ -64,7 +64,7 @@
 class DispSyncThread: public Thread {
 public:
 
-    DispSyncThread(const char* name):
+    explicit DispSyncThread(const char* name):
             mName(name),
             mStop(false),
             mPeriod(0),
diff --git a/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.cpp b/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.cpp
index 6ebcdfe..aa45725 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.cpp
@@ -91,7 +91,7 @@
 
 class HWC2On1Adapter::Callbacks : public hwc_procs_t {
     public:
-        Callbacks(HWC2On1Adapter& adapter) : mAdapter(adapter) {
+        explicit Callbacks(HWC2On1Adapter& adapter) : mAdapter(adapter) {
             invalidate = &invalidateHook;
             vsync = &vsyncHook;
             hotplug = &hotplugHook;
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer_hwc1.cpp b/services/surfaceflinger/DisplayHardware/HWComposer_hwc1.cpp
index 4afd8a2..9d92f61 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer_hwc1.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer_hwc1.cpp
@@ -926,7 +926,7 @@
 protected:
     HWCTYPE* const mLayerList;
     HWCTYPE* mCurrentLayer;
-    Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer),
+    explicit Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer),
             mIndex(0) { }
     inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
     inline HWCTYPE* getLayer() { return mCurrentLayer; }
diff --git a/services/surfaceflinger/GpuService.cpp b/services/surfaceflinger/GpuService.cpp
index 0c29971..d93f845 100644
--- a/services/surfaceflinger/GpuService.cpp
+++ b/services/surfaceflinger/GpuService.cpp
@@ -27,7 +27,7 @@
 class BpGpuService : public BpInterface<IGpuService>
 {
 public:
-    BpGpuService(const sp<IBinder>& impl) : BpInterface<IGpuService>(impl) {}
+    explicit BpGpuService(const sp<IBinder>& impl) : BpInterface<IGpuService>(impl) {}
 };
 
 IMPLEMENT_META_INTERFACE(GpuService, "android.ui.IGpuService");
diff --git a/services/surfaceflinger/RenderEngine/RenderEngine.cpp b/services/surfaceflinger/RenderEngine/RenderEngine.cpp
index 27357b9..c940069 100644
--- a/services/surfaceflinger/RenderEngine/RenderEngine.cpp
+++ b/services/surfaceflinger/RenderEngine/RenderEngine.cpp
@@ -317,7 +317,7 @@
     KeyedVector<Attribute, EGLint> mList;
     struct Attribute {
         Attribute() : v(0) {};
-        Attribute(EGLint v) : v(v) { }
+        explicit Attribute(EGLint v) : v(v) { }
         EGLint v;
         bool operator < (const Attribute& other) const {
             // this places EGL_NONE at the end
@@ -338,18 +338,18 @@
     public:
         void operator = (EGLint value) {
             if (attribute != EGL_NONE) {
-                v.mList.add(attribute, value);
+                v.mList.add(Attribute(attribute), value);
             }
         }
         operator EGLint () const { return v.mList[attribute]; }
     };
 public:
     EGLAttributeVector() {
-        mList.add(EGL_NONE, EGL_NONE);
+        mList.add(Attribute(EGL_NONE), EGL_NONE);
     }
     void remove(EGLint attribute) {
         if (attribute != EGL_NONE) {
-            mList.removeItem(attribute);
+            mList.removeItem(Attribute(attribute));
         }
     }
     Adder operator [] (EGLint attribute) {
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index a69b11b..2e17bf7 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -231,7 +231,7 @@
              flinger->setTransactionFlags(eDisplayTransactionNeeded);
          }
      public:
-        DisplayToken(const sp<SurfaceFlinger>& flinger)
+        explicit DisplayToken(const sp<SurfaceFlinger>& flinger)
             : flinger(flinger) {
         }
     };
@@ -2450,7 +2450,7 @@
     class MessageScreenInitialized : public MessageBase {
         SurfaceFlinger* flinger;
     public:
-        MessageScreenInitialized(SurfaceFlinger* flinger) : flinger(flinger) { }
+        explicit MessageScreenInitialized(SurfaceFlinger* flinger) : flinger(flinger) { }
         virtual bool handler() {
             flinger->onInitializeDisplays();
             return true;
@@ -3167,7 +3167,7 @@
     }
 
 public:
-    GraphicProducerWrapper(const sp<IGraphicBufferProducer>& impl)
+    explicit GraphicProducerWrapper(const sp<IGraphicBufferProducer>& impl)
     :   impl(impl),
         looper(new Looper(true)),
         result(NO_ERROR),
diff --git a/services/surfaceflinger/SurfaceFlinger_hwc1.cpp b/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
index 00700ab..9744b40 100644
--- a/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
+++ b/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
@@ -230,7 +230,7 @@
              flinger->setTransactionFlags(eDisplayTransactionNeeded);
          }
      public:
-        DisplayToken(const sp<SurfaceFlinger>& flinger)
+        explicit DisplayToken(const sp<SurfaceFlinger>& flinger)
             : flinger(flinger) {
         }
     };
@@ -2475,7 +2475,7 @@
     class MessageScreenInitialized : public MessageBase {
         SurfaceFlinger* flinger;
     public:
-        MessageScreenInitialized(SurfaceFlinger* flinger) : flinger(flinger) { }
+        explicit MessageScreenInitialized(SurfaceFlinger* flinger) : flinger(flinger) { }
         virtual bool handler() {
             flinger->onInitializeDisplays();
             return true;
@@ -3190,7 +3190,7 @@
     }
 
 public:
-    GraphicProducerWrapper(const sp<IGraphicBufferProducer>& impl)
+    explicit GraphicProducerWrapper(const sp<IGraphicBufferProducer>& impl)
     :   impl(impl),
         looper(new Looper(true)),
         result(NO_ERROR),
diff --git a/vulkan/libvulkan/layers_extensions.cpp b/vulkan/libvulkan/layers_extensions.cpp
index f9b1002..78c8620 100644
--- a/vulkan/libvulkan/layers_extensions.cpp
+++ b/vulkan/libvulkan/layers_extensions.cpp
@@ -61,7 +61,7 @@
 
 class LayerLibrary {
    public:
-    LayerLibrary(const std::string& path)
+    explicit LayerLibrary(const std::string& path)
         : path_(path), dlhandle_(nullptr), refcount_(0) {}
 
     LayerLibrary(LayerLibrary&& other)