Intent.putextra () Passing object objects or arraylist<object> (GO)

Intent passing Basic Types I believe everyone is very familiar with how to pass object objects or arraylist<object> objects ?

You can do this by:

(1) Public Intent PutExtra (String name, Serializable value)

(2) Public Intent PutExtra (String name, parcelable value)

Public Intent Putparcelablearraylistextra (String name, arraylist<? extends parcelable> value)

First, through the implementation of the Serializable interface transfer

(1) First let person inherit serializable interface

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2. Package com.example.hellojni;
6. Import java.io.Serializable;
10. Public class Person implements serializable{
14. /** 
16. * Auto Generate
18. */
20. private static final long serialversionuid = -5053412967314724078l;
24. private String name;
28. private int age;
32. Public person (String name, int age) {
34. this.name = name;
36. this.age = age;
38. }
42. Public String GetName () {
44. return name;
46. }
50. public void SetName (String name) {
52. this.name = name;
54. }
58. public int getage () {
60. return age;
62. }
66. public void Setage (int.) {
68. this.age = age;
70. }
74. }

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2. Package com.example.hellojni;
6. Import java.io.Serializable;
10. Public class Person implements serializable{
14. /** 
16. * Auto Generate
18. */
20. private static final long serialversionuid = -5053412967314724078l;
24. private String name;
28. private int age;
32. Public person (String name, int age) {
34. this.name = name;
36. this.age = age;
38. }
42. Public String GetName () {
44. return name;
46. }
50. public void SetName (String name) {
52. this.name = name;
54. }
58. public int getage () {
60. return age;
62. }
66. public void Setage (int.) {
68. this.age = age;
70. }
74. }

(2) Transmission via Intent: Public Intent PutExtra (String name, Serializable value)

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1. Intent Intent = new Intent (This, otheractivity.   Class);
2. Intent.putextra ("Person", new Person ("Bear", 22));
3. StartActivity (Intent);

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1. Intent Intent = new Intent (This, otheractivity.   Class);
2. Intent.putextra ("Person", new Person ("Bear", 22));
3. StartActivity (Intent);

(3) Another activity in the print value:

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1. Intent Intent = Getintent ();
2. Person person = (person) Intent.getserializableextra ("person");
3. System.  out.println ("Name:" + person.getname ());
4. System.  out.println ("Age:" + person.getage ());

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1. Intent Intent = Getintent ();
2. Person person = (person) Intent.getserializableextra ("person");
3. System.  out.println ("Name:" + person.getname ());
4. System.  out.println ("Age:" + person.getage ());

(4) transmission Arraylist<person>:

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1. Intent Intent = new Intent (This, otheractivity.   Class);
2. arraylist<person> personlist= New arraylist<person> ();
3. Initlist (personlist); //Initialize personlist
4. Intent.putextra ("Personlist", personlist);
5. StartActivity (Intent);

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1. Intent Intent = new Intent (This, otheractivity.   Class);
2. arraylist<person> personlist= New arraylist<person> ();
3. Initlist (personlist); //Initialize personlist
4. Intent.putextra ("Personlist", personlist);
5. StartActivity (Intent);

(Note that the value type must be ArrayList and not a list.) Call or public Intent PutExtra (String name, Serializable value) This function, the other side of the acquisition of the time forced to convert to arraylist<person> can be)

Second, through the implementation of Parcelable interface transfer

Ditto, the person class implements the Parcelable interface:

Pass Object by: Public Intent PutExtra (String name, parcelable value)
Pass arraylist<object> : Public Intent Putparcelablearraylistextra (String name, arraylist<? extends Parcelable> value)

(The same is the serialized interface, for God horse parcelable separate provides 2 functions, and serializable only provide one? Here I am also very puzzled ... ）

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Intent.putextra () Passing object objects or arraylist<object> (GO)