aidl深度解析

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本文是aidl自动生成的java类的解析，让你更加清晰的了解aidl
上一张自己画的UML图
：
这里写图片描述
然后根据图看下面的一个aidl自动生成的java类：public interface ISizeAidlInterface extends android.os.IInterface {    /**     * Local-side IPC implementation stub class.     */    public static abstract class Stub extends android.os.Binder implements com.easou.iris.aidltestnew.ISizeAidlInterface {        private static final java.lang.String DESCRIPTOR = "com.easou.iris.aidltestnew.ISizeAidlInterface";//本aidl的标识        /**         * Construct the stub at attach it to the interface.         * 构造函数里给本Stub设置标识         */        public Stub() {            this.attachInterface(this, DESCRIPTOR);        }        /**         * Cast an IBinder object into an com.easou.iris.aidltestnew.ISizeAidlInterface interface,         * generating a proxy if needed.         * 把IBinder对象转换成ISizeAidlInterface接口，根绝情况使用代理类Proxy         */        public static com.easou.iris.aidltestnew.ISizeAidlInterface asInterface(android.os.IBinder obj) {            if ((obj == null)) {                return null;            }            android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);//根据标识查询是否是本地进程，不是本地的话返回null            if (((iin != null) && (iin instanceof com.easou.iris.aidltestnew.ISizeAidlInterface))) {                return ((com.easou.iris.aidltestnew.ISizeAidlInterface) iin);            }            return new com.easou.iris.aidltestnew.ISizeAidlInterface.Stub.Proxy(obj);//!☆ 跨进程调用，使用代理，把实际的Binder对象传入        }        @Override        public android.os.IBinder asBinder() {//绑定Binder是返回的IBinder对象            return this;        }/***执行方法时参数顺序。*/        @Override        public boolean onTransact(int code, android.os.Parcel data, android.os.Parcel reply, int flags) throws android.os.RemoteException {            switch (code) {                case INTERFACE_TRANSACTION: {                    reply.writeString(DESCRIPTOR);                    return true;                }                case TRANSACTION_setSize: {                    data.enforceInterface(DESCRIPTOR);                    int _arg0;                    _arg0 = data.readInt();                    this.setSize(_arg0);                    reply.writeNoException();                    return true;                }                case TRANSACTION_getSize: {                    data.enforceInterface(DESCRIPTOR);                    int _result = this.getSize();                    reply.writeNoException();                    reply.writeInt(_result);                    return true;                }            }            return super.onTransact(code, data, reply, flags);        }/***代理*/        private static class Proxy implements com.easou.iris.aidltestnew.ISizeAidlInterface {            private android.os.IBinder mRemote;//保存对Stub的引用            Proxy(android.os.IBinder remote) {                mRemote = remote;            }            @Override            public android.os.IBinder asBinder() {                return mRemote;            }            public java.lang.String getInterfaceDescriptor() {                return DESCRIPTOR;            }            @Override            public void setSize(int size) 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(size);                    mRemote.transact(Stub.TRANSACTION_setSize, _data, _reply, 0);                    _reply.readException();                } finally {                    _reply.recycle();                    _data.recycle();                }            }            @Override            public int getSize() throws android.os.RemoteException {                android.os.Parcel _data = android.os.Parcel.obtain();                android.os.Parcel _reply = android.os.Parcel.obtain();                int _result;                try {                    _data.writeInterfaceToken(DESCRIPTOR);                    mRemote.transact(Stub.TRANSACTION_getSize, _data, _reply, 0);                    _reply.readException();                    _result = _reply.readInt();                } finally {                    _reply.recycle();                    _data.recycle();                }                return _result;            }        }        static final int TRANSACTION_setSize = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);        static final int TRANSACTION_getSize = (android.os.IBinder.FIRST_CALL_TRANSACTION + 1);    }    public void setSize(int size) throws android.os.RemoteException;    public int getSize() throws android.os.RemoteException;}
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