Android aidl 进程之间的通信 Android 5.0

Android aidl之间的通信在我看来其实就是Android系统内部的一套通信系统 我们在用的时候通过创建aidl文件来实现Android进程之间的通信
1.我们所定义的通信bean类要实现 Parcelable 这个接口 其实我认为就是现实了可以在底层转化数据的一种方法
2.自己定义的接口方法

package com.text.aidl.bean;

import com.text.aidl.bean.Student;
import com.text.aidl.bean.IClassInterface;
interface IStudentManager {

void setClassInterface (IClassInterface call);
List<Student> getAllStudent ();
Student getStudent (in int id);
void addStudent (in Student stu);
}

和

package com.text.aidl.bean;

import com.text.aidl.bean.Student;
interface IClassInterface {

    void callStudent(in Student stu);

    void callClassId (in int id);
}

这个接口aidl都会在as中自动生成

package com.text.aidl.bean;

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

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

        /**
         * Cast an IBinder object into an com.text.aidl.bean.IClassInterface interface,
         * generating a proxy if needed.
         */
        public static com.text.aidl.bean.IClassInterface asInterface(android.os.IBinder obj) {
            if ((obj == null)) {
                return null;
            }
            android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);
            if (((iin != null) && (iin instanceof com.text.aidl.bean.IClassInterface))) {
                return ((com.text.aidl.bean.IClassInterface) iin);
            }
            return new com.text.aidl.bean.IClassInterface.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 {
            switch (code) {
                case INTERFACE_TRANSACTION: {
                    reply.writeString(DESCRIPTOR);
                    return true;
                }
                case TRANSACTION_callStudent: {
                    data.enforceInterface(DESCRIPTOR);
                    com.text.aidl.bean.Student _arg0;
                    if ((0 != data.readInt())) {
                        _arg0 = com.text.aidl.bean.Student.CREATOR.createFromParcel(data);
                    } else {
                        _arg0 = null;
                    }
                    this.callStudent(_arg0);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_callClassId: {
                    data.enforceInterface(DESCRIPTOR);
                    int _arg0;
                    _arg0 = data.readInt();
                    this.callClassId(_arg0);
                    reply.writeNoException();
                    return true;
                }
            }
            return super.onTransact(code, data, reply, flags);
        }

        private static class Proxy implements com.text.aidl.bean.IClassInterface {
            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;
            }

            @Override
            public void callStudent(com.text.aidl.bean.Student stu) throws android.os.RemoteException {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((stu != null)) {
                        _data.writeInt(1);
                        stu.writeToParcel(_data, 0);
                    } else {
                        _data.writeInt(0);
                    }
                    mRemote.transact(Stub.TRANSACTION_callStudent, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }

            @Override
            public void callClassId(int id) 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(id);
                    mRemote.transact(Stub.TRANSACTION_callClassId, _data, _reply, 0);
                    _reply.readException();
                } finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
        }

        static final int TRANSACTION_callStudent = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
        static final int TRANSACTION_callClassId = (android.os.IBinder.FIRST_CALL_TRANSACTION + 1);
    }

    public void callStudent(com.text.aidl.bean.Student stu) throws android.os.RemoteException;

    public void callClassId(int id) throws android.os.RemoteException;
}

其实我们在用的时候就是用的 Stub 这个东西
然后这个东西继承了 android.os.Binder 我感觉这个东西就是 把接口aidl化然后在代码中用xxx.sub就可以实现这个接口了

下面是代码结构

注意5.0以后的隐式启动

ComponentName componentName = 
new ComponentName("yjapp.yjkm.com.servicedemo", "yjapp.yjkm.com.servicedemo.StudentService");
        intent.setComponent(componentName);
        bindService(intent, mServiceConnection, Context.BIND_AUTO_CREATE);
要这样

然后服务端要开启服务
Intent intent = new Intent();
ComponentName componentName = 
new ComponentName("yjapp.yjkm.com.servicedemo", "yjapp.yjkm.com.servicedemo.StudentService");
        intent.setComponent(componentName);
        startService(intent);

至于 IClassInterface 中的细节展示就呵呵呵了