###源码位置android.content.pm.ActivityInfo.java

public class ActivityInfo extends ComponentInfo
        implements Parcelable {}

继承自ComponentInfo，实现了Parcelable接口，可以序列化

/**
 * Information you can retrieve about a particular application
 * activity or receiver. This corresponds to information collected
 * from the AndroidManifest.xml's <activity> and
 * <receiver> tags.
 */
 它就是从Activity或者Receiver得到的信息。这对应着从AndroidManifest.xml的<activiy>标签和
 <receiver>标签得到的信息。

####问题1->”既然从Receiver收集到的信息也能是ActivityInfo,难道Receiver属于Activity?