trouble writing output: Too many methods: 65816; max is 65536. By package bug

max is 65536 ,这是一个很神奇的数字，baidu都查的到

是2的16次方: 65536=2^16

java中规定一个包里只需容纳2^16个method，如果超出了就需要打包

如果超了会出现bug

trouble writing output: Too many methods: 65816; max is 65536. By package:
    26 android
   145 android.accessibilityservice
   700 android.accounts
   436 android.animation
     8 android.annotation
  3857 android.app
   240 android.app.admin
   308 android.app.backup
   105 android.appwidget
  1066 android.bluetooth
  1741 android.content
   956 android.content.pm
   499 android.content.res
   522 android.database
   497 android.database.sqlite
    91 android.ddm
     5 android.debug
   163 android.drm
    51 android.drm.mobile1
    30 android.emoji
    23 android.filterfw
   817 android.filterfw.core
    26 android.filterfw.format
    42 android.filterfw.geometry
    46 android.filterfw.io
    83 android.filterpacks.base
   410 android.filterpacks.imageproc
     6 android.filterpacks.numeric
    17 android.filterpacks.performance
    18 android.filterpacks.text
    29 android.filterpacks.ui
    18 android.filterpacks.videoproc
    21 android.filterpacks.videosink
    86 android.filterpacks.videosrc
。。。

 所以需要把一部分分包，名字叫接口分离技术：

之后

需要在\build\target\product\core.mk加入PRODUCT_PACKAGES，将一些多余的接口加入到其它中

具体网站：https://github.com/CyanogenMod/android_frameworks_base/commit/854f6f736b90d33b59b5a85bcecf72a416c43b7d

./frameworks/base/Android.mk

@@ -28,10 +28,25 @@ framework_res_source_path := APPS/framework-res_intermediates/src
 
 # the library
 # ============================================================
+#
+# These will be included in framework2 to avoid issues with the limit
+# on the number of classes/dex
+SECONDARY_FRAMEWORKS_SUBDIRS := \
+        core/java/android/test \
+        core/java/android/gesture \
+        core/java/android/speech/srec \
+        media/java/android/media/videoeditor \
+        media/java/android/media/audiofx \
+        media/mca/effect/java/android/media/effect \
+        media/mca/effect/java/android/media/effect/effects
+
 include $(CLEAR_VARS)
 
 # FRAMEWORKS_BASE_SUBDIRS comes from build/core/pathmap.mk
 LOCAL_SRC_FILES := $(call find-other-java-files,$(FRAMEWORKS_BASE_SUBDIRS))
+SECONDARY_SRC_FILES := $(call find-other-java-files,$(SECONDARY_FRAMEWORKS_SUBDIRS))
+
+LOCAL_SRC_FILES := $(filter-out $(SECONDARY_SRC_FILES),$(LOCAL_SRC_FILES))
 
 # EventLogTags files.
 LOCAL_SRC_FILES += \
@@ -252,6 +267,7 @@ $(full_classes_compiled_jar): $(framework_res_R_stamp)
 $(LOCAL_INSTALLED_MODULE): | $(dir $(LOCAL_INSTALLED_MODULE))framework-res.apk
 
 framework_built := $(call java-lib-deps,framework)
+framework_built += $(call java-lib-deps,framework2)
 
 # AIDL files to be preprocessed and included in the SDK,
 # relative to the root of the build tree.
@@ -390,6 +406,7 @@ framework_docs_LOCAL_JAVA_LIBRARIES := \
       core \
       ext \
       framework \
+      framework2 \
 
 framework_docs_LOCAL_MODULE_CLASS := JAVA_LIBRARIES
 framework_docs_LOCAL_DROIDDOC_HTML_DIR := docs/html
@@ -664,7 +681,7 @@ include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:=$(framework_docs_LOCAL_SRC_FILES)
 LOCAL_INTERMEDIATE_SOURCES:=$(framework_docs_LOCAL_INTERMEDIATE_SOURCES)
-LOCAL_JAVA_LIBRARIES:=$(framework_docs_LOCAL_JAVA_LIBRARIES) framework
+LOCAL_JAVA_LIBRARIES:=$(framework_docs_LOCAL_JAVA_LIBRARIES) framework framework2
 LOCAL_MODULE_CLASS:=$(framework_docs_LOCAL_MODULE_CLASS)
 LOCAL_DROIDDOC_SOURCE_PATH:=$(framework_docs_LOCAL_DROIDDOC_SOURCE_PATH)
 LOCAL_DROIDDOC_HTML_DIR:=$(framework_docs_LOCAL_DROIDDOC_HTML_DIR)
@@ -717,6 +734,26 @@ LOCAL_DX_FLAGS := --core-library
 
 include $(BUILD_JAVA_LIBRARY)
 
+include $(CLEAR_VARS)
+
+# FRAMEWORKS_BASE_SUBDIRS comes from build/core/pathmap.mk
+LOCAL_SRC_FILES := $(call find-other-java-files,$(SECONDARY_FRAMEWORKS_SUBDIRS))
+
+LOCAL_NO_STANDARD_LIBRARIES := true
+LOCAL_JAVA_LIBRARIES := bouncycastle core core-junit ext framework
+
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE := framework2
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+
+LOCAL_NO_EMMA_INSTRUMENT := true
+LOCAL_NO_EMMA_COMPILE := true
+
+#LOCAL_JARJAR_RULES := $(LOCAL_PATH)/jarjar-rules.txt
+
+LOCAL_DX_FLAGS := --core-library
+
+include $(BUILD_JAVA_LIBRARY)
 
 # Include subdirectory makefiles
 # ============================================================
@@ -726,3 +763,4 @@ include $(BUILD_JAVA_LIBRARY)
 ifeq (,$(ONE_SHOT_MAKEFILE))
 include $(call first-makefiles-under,$(LOCAL_PATH))
 endif

 ./frameworks/base/test-runner/Android.mk

LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
-LOCAL_JAVA_LIBRARIES := core core-junit framework
+LOCAL_JAVA_LIBRARIES := core core-junit framework framework2
 
 LOCAL_MODULE:= android.test.runner
 

 直接照着做就ok了