总体来说，讲的不是很清楚，还请大家见谅。
最近两天在Linux中的Android项目开发上遇到这个问题。
是因为之前的一个平台（android 5.0） 的App 在 另一个平台（android6.0）上也同时需要。
1.将原来app的源码 copy 到新建的仓库
2.排除一些平台彼此不兼容的属性，OK，mm -B -> complie succeeded。
然后就遇到了难了我一天一夜的难题。
出现了下面的这个issue：
--------- beginning of main
--------- beginning of system
01-20 11:20:27.632 26248 26248 D AndroidRuntime: Shutting down VM
--------- beginning of crash
01-20 11:20:27.634 26248 26248 E AndroidRuntime: FATAL EXCEPTION: main
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Process: com.android.calculator2, PID: 26248
01-20 11:20:27.634 26248 26248 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.calculator2/com.android.calculator2.Calculator}: android.view.InflateException: Binary XML file line #22: Binary XML file line #39: Error inflating class android.support.v7.widget.RecyclerView
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2452)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.access$900(ActivityThread.java:158)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5515)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #22: Binary XML file line #39: Error inflating class android.support.v7.widget.RecyclerView
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:393)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.Activity.setContentView(Activity.java:2276)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at com.android.calculator2.Calculator.onCreate(Calculator.java:156)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6445)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1112)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2405)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 9 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #39: Error inflating class android.support.v7.widget.RecyclerView
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.createView(LayoutInflater.java:645)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 17 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: java.lang.reflect.InvocationTargetException
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.reflect.Constructor.newInstance(Native Method)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.createView(LayoutInflater.java:619)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 29 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v7/recyclerview/R$styleable;
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:440)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:409)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 31 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.recyclerview.R$styleable" on path: DexPathList[[zip file "/system/app/ExactCalculator/Calculator.apk"],nativeLibraryDirectories=[/system/app/ExactCalculator/lib/arm64, /vendor/lib64, /system/lib64]]
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 33 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Suppressed: java.lang.ClassNotFoundException: android.support.v7.recyclerview.R$styleable
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.Class.classForName(Native Method)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.BootClassLoader.loadClass(ClassLoader.java:8
从log中我们可以看到，
一开始只注意到了第一点，于是在网络上查呀查：
就发现大家的说法就是 在eclipse或者android studio上 因为sdk的版本不match，等等的。有的人说把android.support.v7.recyclerview.jar这个包换掉，换成match的版本的就好了，但我这边因为开发方式不一样，就又断掉了。但是却让我知道了是版本的问题
后来
有的人说是
1.AndroidManifest.xml中的targetSDKVersion不对,fix -> NOK。
2.build.gradle中的某些属性不对。fix -> NOK
因为App是独立的apk，就去这5.0，6.0 andorid 的源码中去找android.support.v7.recyclerview.
同时又注意到了这两点错误
2.同时还有这样的 java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v7/recyclerview/R$styleable
3.Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.recyclerview.R$styleable"
从Log中我们可以看到
at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:440)
at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:409)
RecyclerView的409 和 440 行出错
就发现了在 frameworks/support/v7/recyclerview/src/android/support/v7/widget/RecyclerView.java中
使用到了R.styleable.RecyclerView这个属性，而第2，3点log中出现的就是R$styleable 的错误。
明确了：在android6.0版本RecyclerView类中用到了R.styleable.RecyclerView这个资源。而android5.0的版本中的RecyclerView类没用到R.styleable.RecyclerView
回到frameworks/support/v7/recyclerview/目录下就会发现
-----------5.0 没有res/ 文件夹
-----------6.0 则有
-------------------------------------------------------------------------------------------------------
问题又来了：res/资源是在哪里加载的？
----------》 Android.mk 文件下有这么一段
LOCAL_STATIC_JAVA_LIBARIES := android-support-v7-recyclerview
.......
.......
.......
LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/ ,$(res_dir))
.......
.......
.......
LOCAL_APPT_FLAGS := --auto-add-overlay\
.......
1.LOCAL_STATIC_JAVA_LIBARIES 本地静态java库。
2.LOCAL_RESOURCE_DIR 本地资源文件，默认是product package和device package下面相应的res路径和$(LOCAL_PATH)/res
3.LOCAL_AAPT_FLAGS += -c ldpi -c mdpi
上面指定了编译时打包 ldpi 和mdpi 如果系统默认的是hdpi的话，那就是这三种都会装入包中
在中场总结的时候，已经明确，是因为res资源没有加载。
所以只需要在LOCAL_RESOURCE_DIR中加上frameworks/support/v7/recyclerview/res就可以了
Android.mk文件内容变成：
LOCAL_STATIC_JAVA_LIBARIES := android-support-v7-recyclerview
.......
.......
.......
LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/ ,$(res_dir))
frameworks/support/v7/recyclerview/res \
.......
.......
.......
LOCAL_APPT_FLAGS := --auto-add-overlay\
--extra-package android.support.v7.recyclerview \
.......
再次编译，正常运行。
======================================================================================================
其实就是因为android的版本升级，RecyclerView 中的创建LayoutManager的方式发生了改变，旧版本里少了个 R.styleable.RecyclerView, 而在新环境下又没将其编译进去，故有此错。
各位少侠也可以在 package 中的res/attrs.xml 下面自己定义一个`````
总体来说将的不是很清楚， 还请大家见谅 。。
最近两天在Linux中的Android项目开发上遇到这个问题。
是因为之前的一个平台（android 5.0） 的App 在 另一个平台（android6.0）上也同时需要。
1.将原来app的源码 copy 到新建的仓库
2.排除一些平台彼此不兼容的属性，OK，mm -B -> complie succeeded。
然后就遇到了难了我一天一夜的难题。
出现了下面的这个issue：
--------- beginning of main
--------- beginning of system
01-20 11:20:27.632 26248 26248 D AndroidRuntime: Shutting down VM
--------- beginning of crash
01-20 11:20:27.634 26248 26248 E AndroidRuntime: FATAL EXCEPTION: main
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Process: com.android.calculator2, PID: 26248
01-20 11:20:27.634 26248 26248 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.calculator2/com.android.calculator2.Calculator}: android.view.InflateException: Binary XML file line #22: Binary XML file line #39: Error inflating class android.support.v7.widget.RecyclerView
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2452)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.access$900(ActivityThread.java:158)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5515)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #22: Binary XML file line #39: Error inflating class android.support.v7.widget.RecyclerView
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:393)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.Activity.setContentView(Activity.java:2276)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at com.android.calculator2.Calculator.onCreate(Calculator.java:156)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6445)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1112)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2405)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 9 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #39: Error inflating class android.support.v7.widget.RecyclerView
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.createView(LayoutInflater.java:645)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 17 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: java.lang.reflect.InvocationTargetException
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.reflect.Constructor.newInstance(Native Method)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.view.LayoutInflater.createView(LayoutInflater.java:619)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 29 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v7/recyclerview/R$styleable;
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:440)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:409)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 31 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.recyclerview.R$styleable" on path: DexPathList[[zip file "/system/app/ExactCalculator/Calculator.apk"],nativeLibraryDirectories=[/system/app/ExactCalculator/lib/arm64, /vendor/lib64, /system/lib64]]
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: ... 33 more
01-20 11:20:27.634 26248 26248 E AndroidRuntime: Suppressed: java.lang.ClassNotFoundException: android.support.v7.recyclerview.R$styleable
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.Class.classForName(Native Method)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
01-20 11:20:27.634 26248 26248 E AndroidRuntime: at java.lang.BootClassLoader.loadClass(ClassLoader.java:8
从log中我们可以看到，
1.Binary XML file line #22: Binary XML file line #39: Error inflating class android.support.v7.widget.RecyclerView
2.同时还有这样的 java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v7/recyclerview/R$styleable
一开始只注意到了第一点，于是在网络上查呀查：
就发现大家的说法就是 在eclipse或者android studio上 因为sdk的版本不match，等等的。有的人说把android.support.v7.recyclerview.jar这个包换掉，换成match的版本的就好了，但我这边因为开发方式不一样，就又断掉了。但是却让我知道了是版本的问题
后来
有的人说是
1.AndroidManifest.xml中的targetSDKVersion不对,fix -> NOK。
2.build.gradle中的某些属性不对。fix -> NOK
因为App是独立的apk，就去这5.0，6.0 andorid 的源码中去找android.support.v7.recyclerview.
同时又注意到了这两点错误
2.同时还有这样的 java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v7/recyclerview/R$styleable
3.Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.recyclerview.R$styleable"
从Log中我们可以看到
at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:440)
at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:409)
RecyclerView的409 和 440 行出错
就发现了在 frameworks/support/v7/recyclerview/src/android/support/v7/widget/RecyclerView.java中
使用到了R.styleable.RecyclerView这个属性，而第2，3点log中出现的就是R$styleable 的错误。
明确了：在android6.0版本RecyclerView类中用到了R.styleable.RecyclerView这个资源。而android5.0的版本中的RecyclerView类没用到R.styleable.RecyclerView
回到frameworks/support/v7/recyclerview/目录下就会发现
-----------5.0 没有res/ 文件夹
-----------6.0 则有
-------------------------------------------------------------------------------------------------------
问题又来了：res/资源是在哪里加载的？
----------》 Android.mk 文件下有这么一段
LOCAL_STATIC_JAVA_LIBARIES := android-support-v7-recyclerview
.......
.......
.......
LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/ ,$(res_dir))
.......
.......
.......
LOCAL_APPT_FLAGS := --auto-add-overlay\
.......
发现了android-support-v7-recyclerview的身影
1.LOCAL_STATIC_JAVA_LIBARIES 本地静态java库。
2.LOCAL_RESOURCE_DIR 本地资源文件，默认是product package和device package下面相应的res路径和$(LOCAL_PATH)/res
3.LOCAL_AAPT_FLAGS += -c ldpi -c mdpi
上面指定了编译时打包 ldpi 和mdpi 如果系统默认的是hdpi的话，那就是这三种都会装入包中
在中场总结的时候，已经明确，是因为res资源没有加载。
所以只需要在LOCAL_RESOURCE_DIR中加上frameworks/support/v7/recyclerview/res就可以了
Android.mk文件内容变成：
LOCAL_STATIC_JAVA_LIBARIES := android-support-v7-recyclerview
.......
.......
.......
LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/ ,$(res_dir))
frameworks/support/v7/recyclerview/res \
.......
.......
.......
LOCAL_APPT_FLAGS := --auto-add-overlay\
--extra-package android.support.v7.recyclerview \
.......
再次编译，正常运行。
======================================================================================================
其实就是因为android的版本升级，RecyclerView 中的创建LayoutManager的方式发生了改变，旧版本里少了个 R.styleable.RecyclerView, 而在新环境下又没将其编译进去，故有此错。
各位少侠也可以在 package 中的res/attrs.xml 下面自己定义一个`````
总体来说将的不是很清楚， 还请大家见谅 。。