diff --git a/core/java/android/database/CursorWindow.java b/core/java/android/database/CursorWindow.java
index 39889b983e6cd..599431fd90462 100644
--- a/core/java/android/database/CursorWindow.java
+++ b/core/java/android/database/CursorWindow.java
@@ -224,8 +224,6 @@ public class CursorWindow extends SQLiteClosable implements Parcelable {
         return getType(row, col) == Cursor.FIELD_TYPE_NULL;
     }
     
-    private native boolean isNull_native(int row, int col);
-    
     /**
      * Returns a byte array for the given field.
      *
@@ -280,7 +278,8 @@ public class CursorWindow extends SQLiteClosable implements Parcelable {
      */
     @Deprecated
     public boolean isBlob(int row, int col) {
-        return getType(row, col) == Cursor.FIELD_TYPE_BLOB;
+        int type = getType(row, col);
+        return type == Cursor.FIELD_TYPE_BLOB || type == Cursor.FIELD_TYPE_NULL;
     }
 
     /**
@@ -319,13 +318,10 @@ public class CursorWindow extends SQLiteClosable implements Parcelable {
      */
     @Deprecated
     public boolean isString(int row, int col) {
-        return getType(row, col) == Cursor.FIELD_TYPE_STRING;
+        int type = getType(row, col);
+        return type == Cursor.FIELD_TYPE_STRING || type == Cursor.FIELD_TYPE_NULL;
     }
 
-    private native boolean isBlob_native(int row, int col);
-    private native boolean isString_native(int row, int col);
-    private native boolean isInteger_native(int row, int col);
-    private native boolean isFloat_native(int row, int col);
     private native int getType_native(int row, int col);
 
     /**
diff --git a/core/jni/android_database_CursorWindow.cpp b/core/jni/android_database_CursorWindow.cpp
index 55f5252761964..040dac3d61cc8 100644
--- a/core/jni/android_database_CursorWindow.cpp
+++ b/core/jni/android_database_CursorWindow.cpp
@@ -225,70 +225,6 @@ LOG_WINDOW("Getting blob for %d,%d from %p", row, column, window);
     return NULL;
 }
 
-static jboolean isBlob_native(JNIEnv* env, jobject object, jint row, jint column)
-{
-    int32_t err;
-    CursorWindow * window = GET_WINDOW(env, object);
-LOG_WINDOW("Checking if column is a blob or null for %d,%d from %p", row, column, window);
-
-    field_slot_t field;
-    err = window->read_field_slot(row, column, &field);
-    if (err != 0) {
-        throwExceptionWithRowCol(env, row, column);
-        return NULL;
-    }
-
-    return field.type == FIELD_TYPE_BLOB || field.type == FIELD_TYPE_NULL;
-}
-
-static jboolean isString_native(JNIEnv* env, jobject object, jint row, jint column)
-{
-    int32_t err;
-    CursorWindow * window = GET_WINDOW(env, object);
-LOG_WINDOW("Checking if column is a string or null for %d,%d from %p", row, column, window);
-
-    field_slot_t field;
-    err = window->read_field_slot(row, column, &field);
-    if (err != 0) {
-        throwExceptionWithRowCol(env, row, column);
-        return NULL;
-    }
-
-    return field.type == FIELD_TYPE_STRING || field.type == FIELD_TYPE_NULL;
-}
-
-static jboolean isInteger_native(JNIEnv* env, jobject object, jint row, jint column)
-{
-    int32_t err;
-    CursorWindow * window = GET_WINDOW(env, object);
-LOG_WINDOW("Checking if column is an integer for %d,%d from %p", row, column, window);
-
-    field_slot_t field;
-    err = window->read_field_slot(row, column, &field);
-    if (err != 0) {
-        throwExceptionWithRowCol(env, row, column);
-        return NULL;
-    }
-
-    return field.type == FIELD_TYPE_INTEGER;
-}
-
-static jboolean isFloat_native(JNIEnv* env, jobject object, jint row, jint column)
-{
-    int32_t err;
-    CursorWindow * window = GET_WINDOW(env, object);
-LOG_WINDOW("Checking if column is a float for %d,%d from %p", row, column, window);
-
-    field_slot_t field;
-    err = window->read_field_slot(row, column, &field);
-    if (err != 0) {
-        throwExceptionWithRowCol(env, row, column);
-        return NULL;
-    }
-
-    return field.type == FIELD_TYPE_FLOAT;
-}
-
 static jstring getString_native(JNIEnv* env, jobject object, jint row, jint column)
 {
     int32_t err;
@@ -487,10 +423,9 @@ LOG_WINDOW("Getting double for %d,%d from %p", row, column, window);
     }
 }
 
-static jboolean isNull_native(JNIEnv* env, jobject object, jint row, jint column)
+bool isNull_native(CursorWindow *window, jint row, jint column)
 {
-    CursorWindow * window = GET_WINDOW(env, object);
-LOG_WINDOW("Checking for NULL at %d,%d from %p", row, column, window);
+    LOG_WINDOW("Checking for NULL at %d,%d from %p", row, column, window);
 
     bool isNull;
     if (window->getNull(row, column, &isNull)) {
@@ -658,6 +593,10 @@ static jint getType_native(JNIEnv* env, jobject object, jint row, jint column)
     CursorWindow * window = GET_WINDOW(env, object);
     LOG_WINDOW("returning column type affinity for %d,%d from %p", row, column, window);
 
+    if (isNull_native(window, row, column)) {
+      return FIELD_TYPE_NULL;
+    }
+
     field_slot_t field;
     err = window->read_field_slot(row, column, &field);
     if (err != 0) {
@@ -678,11 +617,9 @@ static JNINativeMethod sMethods[] =
     {"close_native", "()V", (void *)native_close},
     {"getLong_native", "(II)J", (void *)getLong_native},
     {"getBlob_native", "(II)[B", (void *)getBlob_native},
-    {"isBlob_native", "(II)Z", (void *)isBlob_native},
     {"getString_native", "(II)Ljava/lang/String;", (void *)getString_native},
     {"copyStringToBuffer_native", "(IIILandroid/database/CharArrayBuffer;)[C", (void *)copyStringToBuffer_native},
     {"getDouble_native", "(II)D", (void *)getDouble_native},
-    {"isNull_native", "(II)Z", (void *)isNull_native},
     {"getNumRows_native", "()I", (void *)getNumRows},
     {"setNumColumns_native", "(I)Z", (void *)setNumColumns},
     {"allocRow_native", "()Z", (void *)allocRow},
@@ -692,9 +629,6 @@ static JNINativeMethod sMethods[] =
     {"putDouble_native", "(DII)Z", (void *)putDouble_native},
     {"freeLastRow_native", "()V", (void *)freeLastRow},
     {"putNull_native", "(II)Z", (void *)putNull_native},
-    {"isString_native", "(II)Z", (void *)isString_native},
-    {"isFloat_native", "(II)Z", (void *)isFloat_native},
-    {"isInteger_native", "(II)Z", (void *)isInteger_native},
     {"getType_native", "(II)I", (void *)getType_native},
 };