Android Object transfer and parcel mechanism

In the development of many to use the activity directly transfer objects, let's look at, in fact, in Java almost
Custom Object Delivery: There are two ways to pass a custom object through intent
The first is to implement serialization interface;
The second is to implement Parcelable interface;

Let's look at an example:

Package Com.example.bean; import java.io.Serializable; Public classBed implements Serializable {PrivateString name; Private intNumber ;  PublicString GetName () {returnname; }   Public voidsetName (String name) { This. Name =name; }   Public intGetNumber () {returnNumber ; }   Public voidSetnumber (intNumber ) {    This. Number =Number ; } @Override PublicString toString () {return "Name:"+ getName () +", Number:"+GetNumber (); } }

Package Com.example.bean; import android.os.Parcel; import android.os.Parcelable; Public classPatient implements parcelable {PrivateString name;Private intNumber ; PublicString GetName () {returnname;}  Public voidsetName (String name) { This. Name =name;}  Public intGetNumber () {returnNumber ;}  Public voidSetnumber (intNumber ) {   This. Number =Number ;}  Public StaticFinal parcelable.creator<patient> Creator =NewParcelable.creator<patient>() {   PublicPatient createfromparcel (Parcel p) {Patient Patient=NewPatient (); Patient.name=p.readstring (); Patient.number=P.readint (); returnpatient; }   PublicPatient[] NewArray (intsize) {   return NewPatient[size]; } }; @Override Public intdescribecontents () {return 0; } /** * * @desc Note: The Write method here and Createfromparcel in the corresponding one by one, or Createfromparcel are p.readstring (), how do you know which one **/@Override Public voidWritetoparcel (Parcel p,intflags)  {p.writestring (name); P.writeint (number); } @Override PublicString toString () {return "Name:"+ getName () +", Number:"+getnumber ();}}

TestActivity.java:StringBuilder SB=NewStringBuilder (); Sb.append ("Serializable Bed object \ n"); Bed Bed= (Bed) getintent (). Getextras ().Get("Bed");  Sb.append (Bed.tostring ()); Sb.append ("\n\nlist<serializable bed> collection \ n"); List<Bed> listbed = (list<bed>) getintent (). Getserializableextra ("Beds");  for(inti =0; I < listbed.size (); i++) {sb.append (listbed.Get(i). toString () +";"); } sb.append ("\n\nparcelable Patient object \ n"); Patient Patient= Getintent (). Getparcelableextra ("Patient1");  Sb.append (Patient.tostring ()); Sb.append ("\n\nparcelable Patient byte[]\n"); byte[] data = Getintent (). Getbytearrayextra ("Patient2"); if(Data! =NULL) {Parcelinch=Parcel.obtain (); inch. Unmarshall (Data,0, data.length); inch. Setdataposition (0); Patient= Patient.CREATOR.createFromParcel (inch);  } sb.append (Patient.tostring ()); Sb.append ("\n\nstring array \ n"); string[] Str= Getintent (). Getstringarrayextra ("Patients");  for(inti =0; i < str.length; i++) {sb.append (str[i]); } TextView TV=(TextView) Findviewbyid (r.id.tv); Tv.settext (SB);

Android Object transfer and parcel mechanism