1、客戶端代碼：
//在客戶端中，可以通過bindService的回調(diào)中獲取AIDL接口
private ServiceConnection conn = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
iMyAidlInterface = IMyAidlInterface.Stub.asInterface(service);
}
@Override
public void onServiceDisconnected(ComponentName name) {
iMyAidlInterface = null;
}
};
//bindService
Intent intent = new Intent();
intent.setComponent(new ComponentName("com.gyw.plugin_apk"
, "com.gyw.plugin_apk.MyServer"));
getActivity().bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);
//方法調(diào)用
public void onClick(View view) {
try {
int res = iMyAidlInterface.add(1, 2);
Log.i("gyw", "從服務(wù)端調(diào)用成功的結(jié)果：" + res);
} catch (RemoteException e) {
e.printStackTrace();
}
}
客戶端調(diào)用流程：
調(diào)用Stub.asInterface獲取BinderProxy對(duì)象
調(diào)用BinderProxy對(duì)象的add方法
2、服務(wù)端代碼：
private IBinder myS = new IMyAidlInterface.Stub() {
@Override
public void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat, double aDouble, String aString) throws RemoteException {
}
@Override
public int add(int num1, int num2) throws RemoteException {
Log.i("Hensen", "從客戶端發(fā)來(lái)的AIDL請(qǐng)求:num1->" + num1 + "::num2->" + num2);
return num1 + num2;
}
};
3、生成的aidl文件解析：
Stub類繼承自Binder，意味著這個(gè)Stub其實(shí)自己是一個(gè)Binder本地對(duì)象，然后實(shí)現(xiàn)了IMyAidlInterface接口，IMyAidlInterface本身是一個(gè)IInterface，因此他攜帶某種客戶端需要的能力（這里是方法add)。此類有一個(gè)內(nèi)部類Proxy，也就是Binder代理對(duì)象
public interface IMyAidlInterface extends android.os.IInterface
{
//客戶端通過這個(gè)Stub去獲取binder的代理對(duì)象
public static abstract class Stub extends android.os.Binder implements com.gyw.plugin_apk.IMyAidlInterface
{
//唯一性標(biāo)識(shí)
private static final java.lang.String DESCRIPTOR = "com.gyw.plugin_apk.IMyAidlInterface";
/** Construct the stub at attach it to the interface. */
public Stub()
{
this.attachInterface(this, DESCRIPTOR);
}
/**
* Cast an IBinder object into an com.gyw.plugin_apk.IMyAidlInterface interface,
* generating a proxy if needed.
*根據(jù) Binder 本地對(duì)象或者代理對(duì)象返回 IMyAidlInterface 接口
*
*服務(wù)端自己通信使用的就是本地的binder對(duì)象，跨進(jìn)程使用的Binder的代理對(duì)象
asInterface方法參數(shù)IBInder就是服務(wù)端的binder對(duì)象，如果是Binder本地對(duì)象，那么它就是Binder類型，如果是Binder代理對(duì)象，那就是BinderProxy類型。
*/
public static com.gyw.plugin_apk.IMyAidlInterface asInterface(android.os.IBinder obj)
{
if ((obj==null)) {
return null;
}
//查找本地對(duì)象
android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);
if (((iin!=null)&&(iin instanceof com.gyw.plugin_apk.IMyAidlInterface))) {
return ((com.gyw.plugin_apk.IMyAidlInterface)iin);
}
//獲取代理對(duì)象
return new com.gyw.plugin_apk.IMyAidlInterface.Stub.Proxy(obj);
}
@Override public android.os.IBinder asBinder()
{
return this;
}
//在Server進(jìn)程里面，onTransact根據(jù)調(diào)用code會(huì)調(diào)用相關(guān)函數(shù)，接著將結(jié)果寫入reply并通過super.onTransact返回給驅(qū)動(dòng)，驅(qū)動(dòng)喚醒掛起的Client進(jìn)程里面的線程并將結(jié)果返回
@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_add:
{
data.enforceInterface(DESCRIPTOR);
int _arg0;
//取出客戶端傳遞過來(lái)的數(shù)據(jù)
_arg0 = data.readInt();
int _arg1;
_arg1 = data.readInt();
//調(diào)用 Binder 本地對(duì)象
int _result = this.add(_arg0, _arg1);
reply.writeNoException();
reply.writeInt(_result);
return true;
}
}
return super.onTransact(code, data, reply, flags);
}
private static class Proxy implements com.gyw.plugin_apk.IMyAidlInterface
{
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;
}
//當(dāng)客戶端調(diào)用add方法時(shí)，首先用Parcel把數(shù)據(jù)序列化，然后調(diào)用mRemote.transact方法，mRemote就是new Stub.Proxy(obj)傳進(jìn)來(lái)的，即BinderProxy對(duì)象
@Override public int add(int x, int y) 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);
_data.writeInt(x);
_data.writeInt(y);
//BinderProxy的transact方法是native方法，它的實(shí)現(xiàn)在native層，它會(huì)去借助Binder驅(qū)動(dòng)完成數(shù)據(jù)的傳輸，當(dāng)完成數(shù)據(jù)傳輸后，會(huì)喚醒Server端，調(diào)用了Server端本地對(duì)象的onTransact函數(shù)
mRemote.transact(Stub.TRANSACTION_add, _data, _reply, 0);
_reply.readException();
_result = _reply.readInt();
}
finally {
_reply.recycle();
_data.recycle();
}
return _result;
}
}
//方法標(biāo)識(shí)，用十六進(jìn)制表示
static final int TRANSACTION_add = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
}
//Server 具有的能力
public int add(int x, int y) throws android.os.RemoteException;
}
