diff --git a/tools/apilint/apilint.py b/tools/apilint/apilint.py
index 6bb28e1..d9d571a 100644
--- a/tools/apilint/apilint.py
+++ b/tools/apilint/apilint.py
@@ -20,15 +20,20 @@
 
 Usage: apilint.py current.txt
 Usage: apilint.py current.txt previous.txt
+
+You can also splice in blame details like this:
+$ git blame api/current.txt -t -e > /tmp/currentblame.txt
+$ apilint.py /tmp/currentblame.txt previous.txt --no-color
 """
 
-import re, sys, collections
+import re, sys, collections, traceback
 
 
 BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
 
 def format(fg=None, bg=None, bright=False, bold=False, dim=False, reset=False):
     # manually derived from http://en.wikipedia.org/wiki/ANSI_escape_code#Codes
+    if "--no-color" in sys.argv: return ""
     codes = []
     if reset: codes.append("0")
     else:
@@ -43,9 +48,10 @@
 
 
 class Field():
-    def __init__(self, clazz, raw):
+    def __init__(self, clazz, raw, blame):
         self.clazz = clazz
         self.raw = raw.strip(" {;")
+        self.blame = blame
 
         raw = raw.split()
         self.split = list(raw)
@@ -65,9 +71,13 @@
 
 
 class Method():
-    def __init__(self, clazz, raw):
+    def __init__(self, clazz, raw, blame):
         self.clazz = clazz
         self.raw = raw.strip(" {;")
+        self.blame = blame
+
+        # drop generics for now
+        raw = re.sub("<.+?>", "", raw)
 
         raw = re.split("[\s(),;]+", raw)
         for r in ["", ";"]:
@@ -89,9 +99,10 @@
 
 
 class Class():
-    def __init__(self, pkg, raw):
+    def __init__(self, pkg, raw, blame):
         self.pkg = pkg
         self.raw = raw.strip(" {;")
+        self.blame = blame
         self.ctors = []
         self.fields = []
         self.methods = []
@@ -103,18 +114,18 @@
         elif "interface" in raw:
             self.fullname = raw[raw.index("interface")+1]
 
-        if "." in self.fullname:
-            self.name = self.fullname[self.fullname.rindex(".")+1:]
-        else:
-            self.name = self.fullname
+        self.fullname = self.pkg.name + "." + self.fullname
+        self.name = self.fullname[self.fullname.rindex(".")+1:]
+
 
     def __repr__(self):
         return self.raw
 
 
 class Package():
-    def __init__(self, raw):
+    def __init__(self, raw, blame):
         self.raw = raw.strip(" {;")
+        self.blame = blame
 
         raw = raw.split()
         self.name = raw[raw.index("package")+1]
@@ -124,44 +135,57 @@
 
 
 def parse_api(fn):
-    api = []
+    api = {}
     pkg = None
     clazz = None
+    blame = None
+
+    re_blame = re.compile("^([a-z0-9]{7,}) \(<([^>]+)>.+?\) (.+?)$")
 
     with open(fn) as f:
         for raw in f.readlines():
             raw = raw.rstrip()
+            match = re_blame.match(raw)
+            if match is not None:
+                blame = match.groups()[0:2]
+                raw = match.groups()[2]
+            else:
+                blame = None
 
             if raw.startswith("package"):
-                pkg = Package(raw)
+                pkg = Package(raw, blame)
             elif raw.startswith("  ") and raw.endswith("{"):
-                clazz = Class(pkg, raw)
-                api.append(clazz)
+                clazz = Class(pkg, raw, blame)
+                api[clazz.fullname] = clazz
             elif raw.startswith("    ctor"):
-                clazz.ctors.append(Method(clazz, raw))
+                clazz.ctors.append(Method(clazz, raw, blame))
             elif raw.startswith("    method"):
-                clazz.methods.append(Method(clazz, raw))
+                clazz.methods.append(Method(clazz, raw, blame))
             elif raw.startswith("    field"):
-                clazz.fields.append(Field(clazz, raw))
+                clazz.fields.append(Field(clazz, raw, blame))
 
     return api
 
 
-failures = []
-
-def filter_dupe(s):
-    return s.replace(" deprecated ", " ")
+failures = {}
 
 def _fail(clazz, detail, msg):
     """Records an API failure to be processed later."""
     global failures
 
+    sig = "%s-%s-%s" % (clazz.fullname, repr(detail), msg)
+    sig = sig.replace(" deprecated ", " ")
+
     res = msg
+    blame = clazz.blame
     if detail is not None:
         res += "\n    in " + repr(detail)
+        blame = detail.blame
     res += "\n    in " + repr(clazz)
     res += "\n    in " + repr(clazz.pkg)
-    failures.append(filter_dupe(res))
+    if blame is not None:
+        res += "\n    last modified by %s in %s" % (blame[1], blame[0])
+    failures[sig] = res
 
 def warn(clazz, detail, msg):
     _fail(clazz, detail, "%sWarning:%s %s" % (format(fg=YELLOW, bg=BLACK), format(reset=True), msg))
@@ -172,7 +196,7 @@
 
 def verify_constants(clazz):
     """All static final constants must be FOO_NAME style."""
-    if re.match("R\.[a-z]+", clazz.fullname): return
+    if re.match("android\.R\.[a-z]+", clazz.fullname): return
 
     for f in clazz.fields:
         if "static" in f.split and "final" in f.split:
@@ -188,6 +212,10 @@
 
 def verify_class_names(clazz):
     """Try catching malformed class names like myMtp or MTPUser."""
+    if clazz.fullname.startswith("android.opengl"): return
+    if clazz.fullname.startswith("android.renderscript"): return
+    if re.match("android\.R\.[a-z]+", clazz.fullname): return
+
     if re.search("[A-Z]{2,}", clazz.name) is not None:
         warn(clazz, None, "Class name style should be Mtp not MTP")
     if re.match("[^A-Z]", clazz.name):
@@ -196,32 +224,35 @@
 
 def verify_method_names(clazz):
     """Try catching malformed method names, like Foo() or getMTU()."""
-    if clazz.pkg.name == "android.opengl": return
+    if clazz.fullname.startswith("android.opengl"): return
+    if clazz.fullname.startswith("android.renderscript"): return
+    if clazz.fullname == "android.system.OsConstants": return
 
     for m in clazz.methods:
         if re.search("[A-Z]{2,}", m.name) is not None:
             warn(clazz, m, "Method name style should be getMtu() instead of getMTU()")
         if re.match("[^a-z]", m.name):
-            error(clazz, None, "Method name must start with lowercase char")
+            error(clazz, m, "Method name must start with lowercase char")
 
 
 def verify_callbacks(clazz):
     """Verify Callback classes.
     All callback classes must be abstract.
     All methods must follow onFoo() naming style."""
+    if clazz.fullname == "android.speech.tts.SynthesisCallback": return
 
     if clazz.name.endswith("Callbacks"):
-        error(clazz, None, "Class must be named exactly Callback")
+        error(clazz, None, "Class name must not be plural")
     if clazz.name.endswith("Observer"):
-        warn(clazz, None, "Class should be named Callback")
+        warn(clazz, None, "Class should be named FooCallback")
 
     if clazz.name.endswith("Callback"):
         if "interface" in clazz.split:
-            error(clazz, None, "Callback must be abstract class")
+            error(clazz, None, "Callback must be abstract class to enable extension in future API levels")
 
         for m in clazz.methods:
             if not re.match("on[A-Z][a-z]*", m.name):
-                error(clazz, m, "Callback method names must be onFoo style")
+                error(clazz, m, "Callback method names must be onFoo() style")
 
 
 def verify_listeners(clazz):
@@ -233,16 +264,16 @@
 
     if clazz.name.endswith("Listener"):
         if " abstract class " in clazz.raw:
-            error(clazz, None, "Listener should be interface")
+            error(clazz, None, "Listener should be an interface, otherwise renamed Callback")
 
         for m in clazz.methods:
             if not re.match("on[A-Z][a-z]*", m.name):
-                error(clazz, m, "Listener method names must be onFoo style")
+                error(clazz, m, "Listener method names must be onFoo() style")
 
         if len(clazz.methods) == 1 and clazz.name.startswith("On"):
             m = clazz.methods[0]
             if (m.name + "Listener").lower() != clazz.name.lower():
-                error(clazz, m, "Single method name should match class name")
+                error(clazz, m, "Single listener method name should match class name")
 
 
 def verify_actions(clazz):
@@ -255,21 +286,24 @@
     for f in clazz.fields:
         if f.value is None: continue
         if f.name.startswith("EXTRA_"): continue
+        if f.name == "SERVICE_INTERFACE" or f.name == "PROVIDER_INTERFACE": continue
 
         if "static" in f.split and "final" in f.split and f.typ == "java.lang.String":
             if "_ACTION" in f.name or "ACTION_" in f.name or ".action." in f.value.lower():
                 if not f.name.startswith("ACTION_"):
-                    error(clazz, f, "Intent action must be ACTION_FOO")
+                    error(clazz, f, "Intent action constant name must be ACTION_FOO")
                 else:
-                    if clazz.name == "Intent":
+                    if clazz.fullname == "android.content.Intent":
                         prefix = "android.intent.action"
-                    elif clazz.name == "Settings":
+                    elif clazz.fullname == "android.provider.Settings":
                         prefix = "android.settings"
+                    elif clazz.fullname == "android.app.admin.DevicePolicyManager" or clazz.fullname == "android.app.admin.DeviceAdminReceiver":
+                        prefix = "android.app.action"
                     else:
                         prefix = clazz.pkg.name + ".action"
                     expected = prefix + "." + f.name[7:]
                     if f.value != expected:
-                        error(clazz, f, "Inconsistent action value")
+                        error(clazz, f, "Inconsistent action value; expected %s" % (expected))
 
 
 def verify_extras(clazz):
@@ -279,6 +313,9 @@
         package android.foo {
             String EXTRA_BAR = "android.foo.extra.BAR";
         }"""
+    if clazz.fullname == "android.app.Notification": return
+    if clazz.fullname == "android.appwidget.AppWidgetManager": return
+
     for f in clazz.fields:
         if f.value is None: continue
         if f.name.startswith("ACTION_"): continue
@@ -288,13 +325,15 @@
                 if not f.name.startswith("EXTRA_"):
                     error(clazz, f, "Intent extra must be EXTRA_FOO")
                 else:
-                    if clazz.name == "Intent":
+                    if clazz.pkg.name == "android.content" and clazz.name == "Intent":
                         prefix = "android.intent.extra"
+                    elif clazz.pkg.name == "android.app.admin":
+                        prefix = "android.app.extra"
                     else:
                         prefix = clazz.pkg.name + ".extra"
                     expected = prefix + "." + f.name[6:]
                     if f.value != expected:
-                        error(clazz, f, "Inconsistent extra value")
+                        error(clazz, f, "Inconsistent extra value; expected %s" % (expected))
 
 
 def verify_equals(clazz):
@@ -303,7 +342,7 @@
     eq = "equals" in methods
     hc = "hashCode" in methods
     if eq != hc:
-        error(clazz, None, "Must override both equals and hashCode")
+        error(clazz, None, "Must override both equals and hashCode; missing one")
 
 
 def verify_parcelable(clazz):
@@ -314,34 +353,59 @@
         describe = [ i for i in clazz.methods if i.name == "describeContents" ]
 
         if len(creator) == 0 or len(write) == 0 or len(describe) == 0:
-            error(clazz, None, "Parcelable requires CREATOR, writeToParcel, and describeContents")
+            error(clazz, None, "Parcelable requires CREATOR, writeToParcel, and describeContents; missing one")
 
 
 def verify_protected(clazz):
     """Verify that no protected methods are allowed."""
     for m in clazz.methods:
         if "protected" in m.split:
-            error(clazz, m, "Protected method")
+            error(clazz, m, "No protected methods; must be public")
     for f in clazz.fields:
         if "protected" in f.split:
-            error(clazz, f, "Protected field")
+            error(clazz, f, "No protected fields; must be public")
 
 
 def verify_fields(clazz):
     """Verify that all exposed fields are final.
     Exposed fields must follow myName style.
     Catch internal mFoo objects being exposed."""
+
+    IGNORE_BARE_FIELDS = [
+        "android.app.ActivityManager.RecentTaskInfo",
+        "android.app.Notification",
+        "android.content.pm.ActivityInfo",
+        "android.content.pm.ApplicationInfo",
+        "android.content.pm.FeatureGroupInfo",
+        "android.content.pm.InstrumentationInfo",
+        "android.content.pm.PackageInfo",
+        "android.content.pm.PackageItemInfo",
+        "android.os.Message",
+        "android.system.StructPollfd",
+    ]
+
     for f in clazz.fields:
         if not "final" in f.split:
-            error(clazz, f, "Bare fields must be final; consider adding accessors")
+            if clazz.fullname in IGNORE_BARE_FIELDS:
+                pass
+            elif clazz.fullname.endswith("LayoutParams"):
+                pass
+            elif clazz.fullname.startswith("android.util.Mutable"):
+                pass
+            else:
+                error(clazz, f, "Bare fields must be marked final; consider adding accessors")
 
         if not "static" in f.split:
             if not re.match("[a-z]([a-zA-Z]+)?", f.name):
-                error(clazz, f, "Non-static fields must be myName")
+                error(clazz, f, "Non-static fields must be named with myField style")
 
-        if re.match("[m][A-Z]", f.name):
+        if re.match("[ms][A-Z]", f.name):
             error(clazz, f, "Don't expose your internal objects")
 
+        if re.match("[A-Z_]+", f.name):
+            if "static" not in f.split or "final" not in f.split:
+                error(clazz, f, "Constants must be marked static final")
+
 
 def verify_register(clazz):
     """Verify parity of registration methods.
@@ -353,34 +417,34 @@
             if m.name.startswith("register"):
                 other = "unregister" + m.name[8:]
                 if other not in methods:
-                    error(clazz, m, "Missing unregister")
+                    error(clazz, m, "Missing unregister method")
             if m.name.startswith("unregister"):
                 other = "register" + m.name[10:]
                 if other not in methods:
-                    error(clazz, m, "Missing register")
+                    error(clazz, m, "Missing register method")
 
             if m.name.startswith("add") or m.name.startswith("remove"):
-                error(clazz, m, "Callback should be register/unregister")
+                error(clazz, m, "Callback methods should be named register/unregister")
 
         if "Listener" in m.raw:
             if m.name.startswith("add"):
                 other = "remove" + m.name[3:]
                 if other not in methods:
-                    error(clazz, m, "Missing remove")
+                    error(clazz, m, "Missing remove method")
             if m.name.startswith("remove") and not m.name.startswith("removeAll"):
                 other = "add" + m.name[6:]
                 if other not in methods:
-                    error(clazz, m, "Missing add")
+                    error(clazz, m, "Missing add method")
 
             if m.name.startswith("register") or m.name.startswith("unregister"):
-                error(clazz, m, "Listener should be add/remove")
+                error(clazz, m, "Listener methods should be named add/remove")
 
 
 def verify_sync(clazz):
     """Verify synchronized methods aren't exposed."""
     for m in clazz.methods:
         if "synchronized" in m.split:
-            error(clazz, m, "Lock exposed")
+            error(clazz, m, "Internal lock exposed")
 
 
 def verify_intent_builder(clazz):
@@ -392,7 +456,7 @@
             if m.name.startswith("create") and m.name.endswith("Intent"):
                 pass
             else:
-                warn(clazz, m, "Should be createFooIntent()")
+                error(clazz, m, "Methods creating an Intent should be named createFooIntent()")
 
 
 def verify_helper_classes(clazz):
@@ -402,25 +466,57 @@
     if "extends android.app.Service" in clazz.raw:
         test_methods = True
         if not clazz.name.endswith("Service"):
-            error(clazz, None, "Inconsistent class name")
+            error(clazz, None, "Inconsistent class name; should be FooService")
+
+        found = False
+        for f in clazz.fields:
+            if f.name == "SERVICE_INTERFACE":
+                found = True
+                if f.value != clazz.fullname:
+                    error(clazz, f, "Inconsistent interface constant; expected %s" % (clazz.fullname))
+
+        if not found:
+            warn(clazz, None, "Missing SERVICE_INTERFACE constant")
+
+        if "abstract" in clazz.split and not clazz.fullname.startswith("android.service."):
+            warn(clazz, None, "Services extended by developers should be under android.service")
+
     if "extends android.content.ContentProvider" in clazz.raw:
         test_methods = True
         if not clazz.name.endswith("Provider"):
-            error(clazz, None, "Inconsistent class name")
+            error(clazz, None, "Inconsistent class name; should be FooProvider")
+
+        found = False
+        for f in clazz.fields:
+            if f.name == "PROVIDER_INTERFACE":
+                found = True
+                if f.value != clazz.fullname:
+                    error(clazz, f, "Inconsistent interface name; expected %s" % (clazz.fullname))
+
+        if not found:
+            warn(clazz, None, "Missing PROVIDER_INTERFACE constant")
+
+        if "abstract" in clazz.split and not clazz.fullname.startswith("android.provider."):
+            warn(clazz, None, "Providers extended by developers should be under android.provider")
+
     if "extends android.content.BroadcastReceiver" in clazz.raw:
         test_methods = True
         if not clazz.name.endswith("Receiver"):
-            error(clazz, None, "Inconsistent class name")
+            error(clazz, None, "Inconsistent class name; should be FooReceiver")
+
     if "extends android.app.Activity" in clazz.raw:
         test_methods = True
         if not clazz.name.endswith("Activity"):
-            error(clazz, None, "Inconsistent class name")
+            error(clazz, None, "Inconsistent class name; should be FooActivity")
 
     if test_methods:
         for m in clazz.methods:
             if "final" in m.split: continue
             if not re.match("on[A-Z]", m.name):
-                error(clazz, m, "Extendable methods should be onFoo() style, otherwise final")
+                if "abstract" in m.split:
+                    error(clazz, m, "Methods implemented by developers must be named onFoo()")
+                else:
+                    warn(clazz, m, "If implemented by developer, should be named onFoo(); otherwise consider marking final")
 
 
 def verify_builder(clazz):
@@ -430,7 +526,7 @@
     if not clazz.name.endswith("Builder"): return
 
     if clazz.name != "Builder":
-        warn(clazz, None, "Should be standalone Builder class")
+        warn(clazz, None, "Builder should be defined as inner class")
 
     has_build = False
     for m in clazz.methods:
@@ -442,11 +538,11 @@
         if m.name.startswith("clear"): continue
 
         if m.name.startswith("with"):
-            error(clazz, m, "Builder methods must be setFoo()")
+            error(clazz, m, "Builder methods names must follow setFoo() style")
 
         if m.name.startswith("set"):
             if not m.typ.endswith(clazz.fullname):
-                warn(clazz, m, "Should return the builder")
+                warn(clazz, m, "Methods should return the builder")
 
     if not has_build:
         warn(clazz, None, "Missing build() method")
@@ -474,7 +570,7 @@
         "android.view",
         "android.animation",
         "android.provider",
-        "android.content",
+        ["android.content","android.graphics.drawable"],
         "android.database",
         "android.graphics",
         "android.text",
@@ -508,29 +604,40 @@
                 warn(clazz, m, "Method argument type violates package layering")
 
 
-def verify_boolean(clazz):
+def verify_boolean(clazz, api):
     """Catches people returning boolean from getFoo() style methods.
     Ignores when matching setFoo() is present."""
+
     methods = [ m.name for m in clazz.methods ]
+
+    builder = clazz.fullname + ".Builder"
+    builder_methods = []
+    if builder in api:
+        builder_methods = [ m.name for m in api[builder].methods ]
+
     for m in clazz.methods:
         if m.typ == "boolean" and m.name.startswith("get") and m.name != "get" and len(m.args) == 0:
             setter = "set" + m.name[3:]
-            if setter not in methods:
-                error(clazz, m, "Methods returning boolean should be isFoo or hasFoo")
+            if setter in methods:
+                pass
+            elif builder is not None and setter in builder_methods:
+                pass
+            else:
+                warn(clazz, m, "Methods returning boolean should be named isFoo, hasFoo, areFoo")
 
 
 def verify_collections(clazz):
     """Verifies that collection types are interfaces."""
+    if clazz.fullname == "android.os.Bundle": return
+
     bad = ["java.util.Vector", "java.util.LinkedList", "java.util.ArrayList", "java.util.Stack",
            "java.util.HashMap", "java.util.HashSet", "android.util.ArraySet", "android.util.ArrayMap"]
     for m in clazz.methods:
-        filt = re.sub("<.+>", "", m.typ)
-        if filt in bad:
-            error(clazz, m, "Return type is concrete collection")
+        if m.typ in bad:
+            error(clazz, m, "Return type is concrete collection; should be interface")
         for arg in m.args:
-            filt = re.sub("<.+>", "", arg)
-            if filt in bad:
-                error(clazz, m, "Argument is concrete collection")
+            if arg in bad:
+                error(clazz, m, "Argument is concrete collection; should be interface")
 
 
 def verify_flags(clazz):
@@ -545,15 +652,17 @@
 
             scope = f.name[0:f.name.index("FLAG_")]
             if val & known[scope]:
-                warn(clazz, f, "Found overlapping flag")
+                warn(clazz, f, "Found overlapping flag constant value")
             known[scope] |= val
 
 
 def verify_all(api):
     global failures
 
-    failures = []
-    for clazz in api:
+    failures = {}
+    for key in sorted(api.keys()):
+        clazz = api[key]
+
         if clazz.pkg.name.startswith("java"): continue
         if clazz.pkg.name.startswith("junit"): continue
         if clazz.pkg.name.startswith("org.apache"): continue
@@ -581,7 +690,7 @@
         verify_aidl(clazz)
         verify_internal(clazz)
         verify_layering(clazz)
-        verify_boolean(clazz)
+        verify_boolean(clazz, api)
         verify_collections(clazz)
         verify_flags(clazz)
 
@@ -598,9 +707,9 @@
     # ignore errors from previous API level
     for p in prev_fail:
         if p in cur_fail:
-            cur_fail.remove(p)
+            del cur_fail[p]
 
 
-for f in cur_fail:
-    print f
+for f in sorted(cur_fail):
+    print cur_fail[f]
     print