1). development/samples/ApiDemos/src/com/example/android/apis/app/
*.aidl, Localservice**.java RemoteService*.java, ServiceStartArguments*.java
2). 深入解析Android 的AIDL Interface （高焕堂）
3). http://wzw19191.blog.163.com/blog/static/131135470201051675520369/
在android中，进程通讯是通过aidl机制来完成的。aidl模型如下：
|<--------------------aidl---------------------->|
client端
-->proxy
----------parcel数据包--------
stub<---server端
也就是说：proxy+parcel+stub构成了aidl.只不过，proxy运行在客户进程，而
stub运行在服务端进程。当你通过aidl去访问服务端时，客户端会阻塞在proxy,服务端处理完后，通知proxy返回。
补充1：
应
用程序获取相关服务的代码：
private AlarmManager getAlarmManager() {
synchronized (sSync) {
if (sAlarmManager == null) {
IBinder b = ServiceManager.getService(ALARM_SERVICE);
IAlarmManager service = IAlarmManager.Stub.asInterface(b);
sAlarmManager = new AlarmManager(service);
}
}
return sAlarmManager;
}
补充2：
AIDL文件生成的java文件中的Stub
类。
public static abstract class Stub extends
android.os.Binder implements
android.net.softap.ISoftApManager {
private static
final java.lang.String DESCRIPTOR = "android.net.softap.ISoftApManager";
/** Construct the stub at attach it to the interface. */
public Stub() {
this.attachInterface(this, DESCRIPTOR);
}
/**
* Cast an IBinder object into an
ISoftApManager interface, generating a
* proxy if needed.
*/
public static
android.net.softap.ISoftApManager asInterface(
android.os.IBinder obj) {
if ((obj == null)) {
return null;
}
android.os.IInterface iin = (android.os.IInterface) obj
.queryLocalInterface(DESCRIPTOR);
if (((iin !=
null) && (iin instanceof android.net.softap.ISoftApManager))) {
return ((android.net.softap.ISoftApManager) iin);
}
return new
android.net.softap.ISoftApManager.Stub.Proxy(obj);
}
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_getApEnabledState: {
data.enforceInterface(DESCRIPTOR);
int _result =
this.getApEnabledState();
reply.writeNoException();
reply.writeInt(_result);
return true;
}
case TRANSACTION_setApEnabled: {
data.enforceInterface(DESCRIPTOR);
boolean
_arg0;
_arg0 = (0 != data.readInt());
boolean _result = this.setApEnabled(_arg0);
reply.writeNoException();
reply.writeInt(((_result) ?
(1) : (0)));
return true;
}
case TRANSACTION_setApSettings: {
data.enforceInterface(DESCRIPTOR);
android.net.softap.SoftApConfigure _arg0;
if ((0 !=
data.readInt())) {
_arg0 =
android.net.softap.SoftApConfigure.CREATOR
.createFromParcel(data);
} else {
_arg0 = null;
}
boolean
_result = this.setApSettings(_arg0);
reply.writeNoException();
reply.writeInt(((_result) ?
(1) : (0)));
return true;
}
case TRANSACTION_getApSettings: {
data.enforceInterface(DESCRIPTOR);
android.net.softap.SoftApConfigure _result = this
.getApSettings();
reply.writeNoException();
if ((_result != null)) {
reply.writeInt(1);
_result
.writeToParcel(
reply,
android.os.Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
} else {
reply.writeInt(0);
}
return true;
}
}
return super.onTransact(code, data, reply, flags);
}
private static class Proxy implements
android.net.softap.ISoftApManager {
private
android.os.IBinder mRemote;
Proxy(android.os.IBinder
remote) {
mRemote = remote;
}
public android.os.IBinder asBinder() {
return mRemote;
}
public
java.lang.String getInterfaceDescriptor() {
return
DESCRIPTOR;
}
public int
getApEnabledState() 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_getApEnabledState,
_data,
_reply, 0);
_reply.readException();
_result =
_reply.readInt();
} finally {
_reply.recycle();
_data.recycle();
}
return _result;
}
public boolean setApEnabled(boolean enable)
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);
_data.writeInt(((enable) ? (1) : (0)));
mRemote.transact(Stub.TRANSACTION_setApEnabled,
_data,
_reply, 0);
_reply.readException();
_result = (0 !=
_reply.readInt());
} finally {
_reply.recycle();
_data.recycle();
}
return _result;
}
public boolean setApSettings(
android.net.softap.SoftApConfigure datas)
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);
if ((datas
!= null)) {
_data.writeInt(1);
datas.writeToParcel(_data, 0);
}
else {
_data.writeInt(0);
}
mRemote.transact(Stub.TRANSACTION_setApSettings, _data,
_reply, 0);
_reply.readException();
_result = (0 !=
_reply.readInt());
} finally {
_reply.recycle();
_data.recycle();
}
return _result;
}
public android.net.softap.SoftApConfigure getApSettings()
throws android.os.RemoteException {
android.os.Parcel _data = android.os.Parcel.obtain();
android.os.Parcel _reply = android.os.Parcel.obtain();
android.net.softap.SoftApConfigure _result;
try {
_data.writeInterfaceToken(DESCRIPTOR);
mRemote.transact(Stub.TRANSACTION_getApSettings, _data,
_reply, 0);
_reply.readException();
if ((0 !=
_reply.readInt())) {
_result =
android.net.softap.SoftApConfigure.CREATOR
.createFromParcel(_reply);
} else {
_result = null;
}
} finally {
_reply.recycle();
_data.recycle();
}
return _result;
}
}
static
final int TRANSACTION_getApEnabledState =
(IBinder.FIRST_CALL_TRANSACTION + 0);
static final int
TRANSACTION_setApEnabled = (IBinder.FIRST_CALL_TRANSACTION + 1);
static final int TRANSACTION_setApSettings =
(IBinder.FIRST_CALL_TRANSACTION + 2);
static final int
TRANSACTION_getApSettings = (IBinder.FIRST_CALL_TRANSACTION + 3);
}
补充3：
通常服务程序该Stub类，也即间接继承了 android.os.Binder，
进而可以作为 SystemManager.addService 等的参数而使用。
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