转载

Java源码阅读绘图规范手册--[捷特版]

最近打算去深读源码，感觉不画图去分析源码根本理不清，也说不清

UML是分析类和类的关系，具体的类内部貌似没有图形机制，没有条件就创造条件呗

借此机会本人自定义一套图形绘图表示规范，并恬不知耻地称为 捷型图

目的为了明确各种元素的图形表示，来表述与分析源码具体运行逻辑

为了避免每张图都加个图例，这里成文统一描述一下

一、常用表示

1.访问限制类型

无形状限定，修饰中(左上角)见色如见人

2.常见修饰符

三角形，放在左上角

3.类相关

4.方法与变量

5.关联线

表述无歧义情况下箭头,数字可略

6.uml线

二.其他不常用:

1.第一组

//待续...

三、几个小例子说明一下

1.类例子

ActivityThread是一个public final的普通类
ApplicationThread 是一个private的内部类 , 并处于 ActivityThread中
复制代码

2.方法与变量例子

3.sendBroadcast的第一层关系

在Activity中调用sendBroadcast，会调用ContextWrapper的sendBroadcast方法
sendBroadcast会使用ContextWrapper的成员变量mBase的sendBroadcast方法
而mBase实际上来源于ContextImpl，而ContextImpl是一个Context类，
ContextImpl的sendBroadcast方法调用ActivityManagerNative.getDefault().broadcastIntent发送广播  

这样就将工作焦点指向ActivityManagerNative，可以进行第二层的绘制，也就是分析
ActivityManagerNative，上面的四行话解释和下面的图你更喜欢哪个?  
成年人的世界没有单选题，当然选择都要，图文结合，更能形象说明
复制代码

4. 捷型图 示例

下图是基于下面类绘制的图形，有什么好的意见或建议欢迎留言，

目前使用 processon在线绘图工具，以后有时间开发个小软件来绘制感觉挺不错，

再加个一键生成什么的就更棒了...

/*
 * This file is auto-generated.  DO NOT MODIFY.
 * Original file: J://Java//Android//LeverUp//TolyService//app//src//main//aidl//com//toly1994//tolyservice//IMusicPlayerService.aidl
 */
package com.toly1994.tolyservice;
// Declare any non-default types here with import statements

public interface IMusicPlayerService extends android.os.IInterface {
    /**
     * Local-side IPC implementation stub class.
     */
    public static abstract class Stub extends android.os.Binder implements com.toly1994.tolyservice.IMusicPlayerService {
        private static final java.lang.String DESCRIPTOR = "com.toly1994.tolyservice.IMusicPlayerService";

        /**
         * Construct the stub at attach it to the interface.
         */
        public Stub() {
            this.attachInterface(this, DESCRIPTOR);
        }

        /**
         * Cast an IBinder object into an com.toly1994.tolyservice.IMusicPlayerService interface,
         * generating a proxy if needed.
         */
        public static com.toly1994.tolyservice.IMusicPlayerService asInterface(android.os.IBinder obj) {
            if ((obj == null)) {
                return null;
            }
            android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);
            if (((iin != null) && (iin instanceof com.toly1994.tolyservice.IMusicPlayerService))) {
                return ((com.toly1994.tolyservice.IMusicPlayerService) iin);
            }
            return new com.toly1994.tolyservice.IMusicPlayerService.Stub.Proxy(obj);
        }

        @Override
        public android.os.IBinder asBinder() {
            return this;
        }

        @Override
        public boolean onTransact(int code, android.os.Parcel data, android.os.Parcel reply, int flags) throws android.os.RemoteException {
            java.lang.String descriptor = DESCRIPTOR;
            switch (code) {
                case INTERFACE_TRANSACTION: {
                    reply.writeString(descriptor);
                    return true;
                }
                case TRANSACTION_stop: {
                    data.enforceInterface(descriptor);
                    this.stop();
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_pause: {
                    data.enforceInterface(descriptor);
                    this.pause();
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_start: {
                    data.enforceInterface(descriptor);
                    this.start();
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_prev: {
                    data.enforceInterface(descriptor);
                    this.prev();
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_next: {
                    data.enforceInterface(descriptor);
                    this.next();
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_release: {
                    data.enforceInterface(descriptor);
                    this.release();
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_isPlaying: {
                    data.enforceInterface(descriptor);
                    boolean _result = this.isPlaying();
                    reply.writeNoException();
                    reply.writeInt(((_result) ? (1) : (0)));
                    return true;
                }
                case TRANSACTION_seek: {
                    data.enforceInterface(descriptor);
                    int _arg0;
                    _arg0 = data.readInt();
                    this.seek(_arg0);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_create: {
                    data.enforceInterface(descriptor);
                    java.util.List<java.lang.String> _arg0;
                    _arg0 = data.createStringArrayList();
                    this.create(_arg0);
                    reply.writeNoException();
                    return true;
                }
                default: {
                    return super.onTransact(code, data, reply, flags);
                }
            }
        }

        private static class Proxy implements com.toly1994.tolyservice.IMusicPlayerService {
            private android.os.IBinder mRemote;

            Proxy(android.os.IBinder remote) {
                mRemote = remote;
            }

            @Override
            public android.os.IBinder asBinder() {
                return mRemote;
            }

            public java.lang.String getInterfaceDescriptor() {
                return DESCRIPTOR;
            }

            /**
             * Demonstrates some basic types that you can use as parameters
             * and return values in AIDL.
             */
            @Override
            public void stop() throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_stop, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }

            @Override
            public void pause() throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_pause, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }

            @Override
            public void start() throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_start, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }

            @Override
            public void prev() throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_prev, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }

            @Override
            public void next() throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_next, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }

            @Override
            public void release() throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_release, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }

            @Override
            public boolean isPlaying() throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                boolean _result;
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_isPlaying, _data, _reply, 0);
                    _reply.readException();
                    _result = (0 != _reply.readInt());
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
                return _result;
            }

            @Override
            public void seek(int pre_100) throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    _data.writeInt(pre_100);
                    mRemote.transact(Stub.TRANSACTION_seek, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
//加in

            @Override
            public void create(java.util.List<java.lang.String> filePaths) throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    _data.writeStringList(filePaths);
                    mRemote.transact(Stub.TRANSACTION_create, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
        }

        static final int TRANSACTION_stop = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
        static final int TRANSACTION_pause = (android.os.IBinder.FIRST_CALL_TRANSACTION + 1);
        static final int TRANSACTION_start = (android.os.IBinder.FIRST_CALL_TRANSACTION + 2);
        static final int TRANSACTION_prev = (android.os.IBinder.FIRST_CALL_TRANSACTION + 3);
        static final int TRANSACTION_next = (android.os.IBinder.FIRST_CALL_TRANSACTION + 4);
        static final int TRANSACTION_release = (android.os.IBinder.FIRST_CALL_TRANSACTION + 5);
        static final int TRANSACTION_isPlaying = (android.os.IBinder.FIRST_CALL_TRANSACTION + 6);
        static final int TRANSACTION_seek = (android.os.IBinder.FIRST_CALL_TRANSACTION + 7);
        static final int TRANSACTION_create = (android.os.IBinder.FIRST_CALL_TRANSACTION + 8);
    }

    /**
     * Demonstrates some basic types that you can use as parameters
     * and return values in AIDL.
     */
    public void stop() throws android.os.RemoteException;

    public void pause() throws android.os.RemoteException;

    public void start() throws android.os.RemoteException;

    public void prev() throws android.os.RemoteException;

    public void next() throws android.os.RemoteException;

    public void release() throws android.os.RemoteException;

    public boolean isPlaying() throws android.os.RemoteException;

    public void seek(int pre_100) throws android.os.RemoteException;
//加in

    public void create(java.util.List<java.lang.String> filePaths) throws android.os.RemoteException;
}
复制代码

原文 https://juejin.im/post/5c495893f265da616e4cc21b

正文到此结束