diff --git a/tools/aapt2/Resources.proto b/tools/aapt2/Resources.proto
index 7e7c86d..00b2869 100644
--- a/tools/aapt2/Resources.proto
+++ b/tools/aapt2/Resources.proto
@@ -285,10 +285,25 @@
 }
 
 // A value that represents a primitive data type (float, int, boolean, etc.).
-// Corresponds to the fields (type/data) of the C struct android::Res_value.
 message Primitive {
-  uint32 type = 1;
-  uint32 data = 2;
+  message NullType {
+  }
+  message EmptyType {
+  }
+  oneof oneof_value {
+    NullType null_value = 1;
+    EmptyType empty_value = 2;
+    float float_value = 3;
+    float dimension_value = 4;
+    float fraction_value = 5;
+    int32 int_decimal_value = 6;
+    uint32 int_hexidecimal_value = 7;
+    bool boolean_value = 8;
+    uint32 color_argb8_value = 9;
+    uint32 color_rgb8_value = 10;
+    uint32 color_argb4_value = 11;
+    uint32 color_rgb4_value = 12;
+  }
 }
 
 // A value that represents an XML attribute and what values it accepts.
diff --git a/tools/aapt2/format/proto/ProtoDeserialize.cpp b/tools/aapt2/format/proto/ProtoDeserialize.cpp
index 0f0bce8..135aa48 100644
--- a/tools/aapt2/format/proto/ProtoDeserialize.cpp
+++ b/tools/aapt2/format/proto/ProtoDeserialize.cpp
@@ -23,6 +23,7 @@
 #include "Locale.h"
 #include "ResourceTable.h"
 #include "ResourceUtils.h"
+#include "ResourceValues.h"
 #include "ValueVisitor.h"
 
 using ::android::ResStringPool;
@@ -742,8 +743,66 @@
 
     case pb::Item::kPrim: {
       const pb::Primitive& pb_prim = pb_item.prim();
-      return util::make_unique<BinaryPrimitive>(static_cast<uint8_t>(pb_prim.type()),
-                                                pb_prim.data());
+      android::Res_value val = {};
+      switch (pb_prim.oneof_value_case()) {
+        case pb::Primitive::kNullValue: {
+          val.dataType = android::Res_value::TYPE_NULL;
+          val.data = android::Res_value::DATA_NULL_UNDEFINED;
+        } break;
+        case pb::Primitive::kEmptyValue: {
+          val.dataType = android::Res_value::TYPE_NULL;
+          val.data = android::Res_value::DATA_NULL_EMPTY;
+        } break;
+        case pb::Primitive::kFloatValue: {
+          val.dataType = android::Res_value::TYPE_FLOAT;
+          float float_val = pb_prim.float_value();
+          val.data = *(uint32_t*)&float_val;
+        } break;
+        case pb::Primitive::kDimensionValue: {
+          val.dataType = android::Res_value::TYPE_DIMENSION;
+          float dimen_val = pb_prim.dimension_value();
+          val.data = *(uint32_t*)&dimen_val;
+        } break;
+        case pb::Primitive::kFractionValue: {
+          val.dataType = android::Res_value::TYPE_FRACTION;
+          float fraction_val = pb_prim.fraction_value();
+          val.data = *(uint32_t*)&fraction_val;
+        } break;
+        case pb::Primitive::kIntDecimalValue: {
+          val.dataType = android::Res_value::TYPE_INT_DEC;
+          val.data = static_cast<uint32_t>(pb_prim.int_decimal_value());
+        } break;
+        case pb::Primitive::kIntHexidecimalValue: {
+          val.dataType = android::Res_value::TYPE_INT_HEX;
+          val.data = pb_prim.int_hexidecimal_value();
+        } break;
+        case pb::Primitive::kBooleanValue: {
+          val.dataType = android::Res_value::TYPE_INT_BOOLEAN;
+          val.data = pb_prim.boolean_value() ? 0xFFFFFFFF : 0x0;
+        } break;
+        case pb::Primitive::kColorArgb8Value: {
+          val.dataType = android::Res_value::TYPE_INT_COLOR_ARGB8;
+          val.data = pb_prim.color_argb8_value();
+        } break;
+        case pb::Primitive::kColorRgb8Value: {
+          val.dataType = android::Res_value::TYPE_INT_COLOR_RGB8;
+          val.data = pb_prim.color_rgb8_value();
+        } break;
+        case pb::Primitive::kColorArgb4Value: {
+          val.dataType = android::Res_value::TYPE_INT_COLOR_ARGB4;
+          val.data = pb_prim.color_argb4_value();
+        } break;
+        case pb::Primitive::kColorRgb4Value: {
+          val.dataType = android::Res_value::TYPE_INT_COLOR_RGB4;
+          val.data = pb_prim.color_rgb4_value();
+        } break;
+        default: {
+          LOG(FATAL) << "Unexpected Primitive type: "
+                     << static_cast<uint32_t>(pb_prim.oneof_value_case());
+          return {};
+        } break;
+      }
+      return util::make_unique<BinaryPrimitive>(val);
     } break;
 
     case pb::Item::kId: {
diff --git a/tools/aapt2/format/proto/ProtoSerialize.cpp b/tools/aapt2/format/proto/ProtoSerialize.cpp
index 97ce01a..249feeb 100644
--- a/tools/aapt2/format/proto/ProtoSerialize.cpp
+++ b/tools/aapt2/format/proto/ProtoSerialize.cpp
@@ -422,8 +422,51 @@
     prim->Flatten(&val);
 
     pb::Primitive* pb_prim = out_value_->mutable_item()->mutable_prim();
-    pb_prim->set_type(val.dataType);
-    pb_prim->set_data(val.data);
+
+    switch (val.dataType) {
+      case android::Res_value::TYPE_NULL: {
+        if (val.data == android::Res_value::DATA_NULL_UNDEFINED) {
+          pb_prim->set_allocated_null_value(new pb::Primitive_NullType());
+        } else if (val.data == android::Res_value::DATA_NULL_EMPTY) {
+          pb_prim->set_allocated_empty_value(new pb::Primitive_EmptyType());
+        } else {
+          LOG(FATAL) << "Unexpected data value for TYPE_NULL BinaryPrimitive: " << val.data;
+        }
+      } break;
+      case android::Res_value::TYPE_FLOAT: {
+        pb_prim->set_float_value(*(float*)&val.data);
+      } break;
+      case android::Res_value::TYPE_DIMENSION: {
+        pb_prim->set_dimension_value(*(float*)&val.data);
+      } break;
+      case android::Res_value::TYPE_FRACTION: {
+        pb_prim->set_fraction_value(*(float*)&val.data);
+      } break;
+      case android::Res_value::TYPE_INT_DEC: {
+        pb_prim->set_int_decimal_value(static_cast<int32_t>(val.data));
+      } break;
+      case android::Res_value::TYPE_INT_HEX: {
+        pb_prim->set_int_hexidecimal_value(val.data);
+      } break;
+      case android::Res_value::TYPE_INT_BOOLEAN: {
+        pb_prim->set_boolean_value(static_cast<bool>(val.data));
+      } break;
+      case android::Res_value::TYPE_INT_COLOR_ARGB8: {
+        pb_prim->set_color_argb8_value(val.data);
+      } break;
+      case android::Res_value::TYPE_INT_COLOR_RGB8: {
+        pb_prim->set_color_rgb8_value(val.data);
+      } break;
+      case android::Res_value::TYPE_INT_COLOR_ARGB4: {
+        pb_prim->set_color_argb4_value(val.data);
+      } break;
+      case android::Res_value::TYPE_INT_COLOR_RGB4: {
+        pb_prim->set_color_rgb4_value(val.data);
+      } break;
+      default:
+        LOG(FATAL) << "Unexpected BinaryPrimitive type: " << val.dataType;
+        break;
+    }
   }
 
   void Visit(const Attribute* attr) override {
diff --git a/tools/aapt2/format/proto/ProtoSerialize_test.cpp b/tools/aapt2/format/proto/ProtoSerialize_test.cpp
index 9649a4d..a9f1f78 100644
--- a/tools/aapt2/format/proto/ProtoSerialize_test.cpp
+++ b/tools/aapt2/format/proto/ProtoSerialize_test.cpp
@@ -243,6 +243,111 @@
   EXPECT_THAT(child_text->text, StrEq("woah there"));
 }
 
+TEST(ProtoSerializeTest, SerializeAndDeserializePrimitives) {
+  std::unique_ptr<ResourceTable> table =
+      test::ResourceTableBuilder()
+          .AddValue("android:bool/boolean_true",
+                    test::BuildPrimitive(android::Res_value::TYPE_INT_BOOLEAN, true))
+          .AddValue("android:bool/boolean_false",
+                    test::BuildPrimitive(android::Res_value::TYPE_INT_BOOLEAN, false))
+          .AddValue("android:color/color_rgb8", ResourceUtils::TryParseColor("#AABBCC"))
+          .AddValue("android:color/color_argb8", ResourceUtils::TryParseColor("#11223344"))
+          .AddValue("android:color/color_rgb4", ResourceUtils::TryParseColor("#DEF"))
+          .AddValue("android:color/color_argb4", ResourceUtils::TryParseColor("#5678"))
+          .AddValue("android:integer/integer_444", ResourceUtils::TryParseInt("444"))
+          .AddValue("android:integer/integer_neg_333", ResourceUtils::TryParseInt("-333"))
+          .AddValue("android:integer/hex_int_abcd", ResourceUtils::TryParseInt("0xABCD"))
+          .AddValue("android:dimen/dimen_1.39mm", ResourceUtils::TryParseFloat("1.39mm"))
+          .AddValue("android:fraction/fraction_27", ResourceUtils::TryParseFloat("27%"))
+          .AddValue("android:integer/null", ResourceUtils::MakeEmpty())
+          .Build();
+
+  pb::ResourceTable pb_table;
+  SerializeTableToPb(*table, &pb_table);
+
+  test::TestFile file_a("res/layout/main.xml");
+  MockFileCollection files;
+  EXPECT_CALL(files, FindFile(Eq("res/layout/main.xml")))
+      .WillRepeatedly(::testing::Return(&file_a));
+
+  ResourceTable new_table;
+  std::string error;
+  ASSERT_TRUE(DeserializeTableFromPb(pb_table, &files, &new_table, &error));
+  EXPECT_THAT(error, IsEmpty());
+
+  BinaryPrimitive* bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(
+      &new_table, "android:bool/boolean_true", ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_INT_BOOLEAN));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseBool("true")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(&new_table, "android:bool/boolean_false",
+                                                          ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_INT_BOOLEAN));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseBool("false")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(&new_table, "android:color/color_rgb8",
+                                                          ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_INT_COLOR_RGB8));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseColor("#AABBCC")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(&new_table, "android:color/color_argb8",
+                                                          ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_INT_COLOR_ARGB8));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseColor("#11223344")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(&new_table, "android:color/color_rgb4",
+                                                          ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_INT_COLOR_RGB4));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseColor("#DEF")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(&new_table, "android:color/color_argb4",
+                                                          ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_INT_COLOR_ARGB4));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseColor("#5678")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(&new_table, "android:integer/integer_444",
+                                                          ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_INT_DEC));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseInt("444")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(
+      &new_table, "android:integer/integer_neg_333", ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_INT_DEC));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseInt("-333")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(
+      &new_table, "android:integer/hex_int_abcd", ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_INT_HEX));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseInt("0xABCD")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(&new_table, "android:dimen/dimen_1.39mm",
+                                                          ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_DIMENSION));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseFloat("1.39mm")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(
+      &new_table, "android:fraction/fraction_27", ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_FRACTION));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::TryParseFloat("27%")->value.data));
+
+  bp = test::GetValueForConfigAndProduct<BinaryPrimitive>(&new_table, "android:integer/null",
+                                                          ConfigDescription::DefaultConfig(), "");
+  ASSERT_THAT(bp, NotNull());
+  EXPECT_THAT(bp->value.dataType, Eq(android::Res_value::TYPE_NULL));
+  EXPECT_THAT(bp->value.data, Eq(ResourceUtils::MakeEmpty()->value.data));
+}
+
 static void ExpectConfigSerializes(const StringPiece& config_str) {
   const ConfigDescription expected_config = test::ParseConfigOrDie(config_str);
   pb::Configuration pb_config;