Android Intent的实质

Intent的实质是binder

Intent 的实质是binder，如下为代码流程。

常见场景：

Intent intent = newIntent(AudioManager.ACTION_AUDIO_BECOMING_NOISY);

mContext.

sendBroadcast

(intent);

ActivityManagerNative.java

public int

broadcastIntent

(IApplicationThread caller,

Intent intent, String resolvedType, IIntentReceiver resultTo,

intresultCode, String resultData, Bundle map,

String requiredPermission, int appOp, boolean serialized,

boolean sticky, int userId) throws RemoteException

{

mRemote.transact(

BROADCAST_INTENT_TRANSACTION

,data, reply, 0);

//

此处即为

binder

通信机制实现

ActivityManagerNative.java

public booleanonTransact(int code, Parcel data, Parcel reply, int flags)

case

BROADCAST_INTENT_TRANSACTION

:

{

data.enforceInterface(IActivityManager.descriptor);

IBinder b =data.readStrongBinder();

int res =

broadcastIntent

(app,intent, resolvedType, resultTo,

resultCode, resultData,resultExtras, perm, appOp,

serialized, sticky,userId);