android - Using Parceble to communicate between activities -


so trying pass object 1 activity using parceble provided in android right thing use in case.

this bean class have serialized implementing parceble

customer.class

public class customer implements parcelable {      int a;     string name;      public customer(int ab , string n) {     this.a=ab;     this.name=n;     }      public int geta() {         return a;     }      public void seta(int a) {         this.a = a;     }      public string getname() {         return name;     }      public void setname(string name) {         this.name = name;     }       public customer(parcel in) {          a= in.readint();             name= in.readstring();         //readfromparcel(in);     }      @override     public int describecontents() {         // todo auto-generated method stub         return 0;     }      @override     public void writetoparcel(parcel dest, int flags) {         dest.writestring(name);         dest.writeint(a);     }      public static final parcelable.creator<customer> creator= new parcelable.creator<customer>() {          @override         public customer createfromparcel(parcel source) {             return new customer(source);         }          @override         public customer[] newarray(int size) {             return new customer[size];         }     };       private void readfromparcel(parcel in) {          a= in.readint();             name= in.readstring();    } }

mainactivity.class

public class mainactivity extends activity {      button b;     customer c;       @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          b=(button) findviewbyid(r.id.button1);          c=new customer(33,"nn");          b.setonclicklistener(new view.onclicklistener() {              @override             public void onclick(view v) {                 intent i=new intent(mainactivity.this,customactivity.class);                 i.putextra("myobj", c);                 startactivity(i);             }         });     }  }

customactivity.class

public class customactivity extends activity{      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);          intent it=getintent();         customer c=(customer)it.getparcelableextra("myobj");          system.out.println("and object "+c.geta()+"/"+c.getname());     } }

and output in logcat:

05-15 12:02:56.014: i/system.out(25581): , object 2/null

the problem in readfromparcel method. rule "the sequence of members must same while writing or reading members of parcelable objects"

so have change readfromparcel(parcel in) from

private void readfromparcel(parcel in) {             a= in.readint();             name= in.readstring();    }

to

private void readfromparcel(parcel in) {                       name= in.readstring();        a= in.readint();      }

because writetoparcel(..) writes name first , a.

parcelable interface overview can reference you.


Comments

Post a Comment

Popular posts from this blog

jquery - How can I dynamically add a browser tab? -

since using iframes house external pages are, accounts "not preferred method" , disallowed sites (flickr, one), want dynamically generate browser tabs. e.g., when user submits form, want dynamically generate tab on browser in response submitted. e.g., might want add new tab url like: http://www.bigsurgarrapata.com/contact how in jquery? you want form target attribute action attribute. http://www.w3schools.com/tags/att_form_target.asp browsers have ultimate control on result of target attribute open new tab value of _blank. <form action="contact_submit.php" target="_blank" method="post">
Read more

keyboard - C++ GetAsyncKeyState alternative -

i using windows.h library's getasynckeystate function define key pushed on keyboard . here program returns int value of pushed key example. #include <iostream> #include <windows.h> using namespace std; int main (){ char i; for(i=8;i<190;i++){ if(getasynckeystate(i)== -32767){ cout<<int (i)<<endl; } } return 0; } but trying make opengl simple game , function appeared slow . there function not need cycle 180 times , if statement . thanks you're trying make opengl game, you're going use glfw. if that's case can away using glfwgetkey() such: if (glfwgetkey(glfw_key_up) == glfw_press) {...} if (glfwgetkey(glfw_key_down) == glfw_press) {...} that method nicely explained in tutorial 6 opengl-tutorial.org . should start first tutorial of beginners tutorials , later intermediate tutorials . if you're going make win32 window can listen wm_keydown or wm_keyup messages , virtua...
Read more

android - java.net.UnknownHostException(Unable to resolve host “URL”: No address associated with hostname) -

i developing app testing asp.net webservice in android.for simple webservice adding 2 numbers used.where numbers passed parameters.the result in dialogue.the webserver works in local. when application runs following result exception.i provided internet permission in manifest. java.net.unknownhostexception(unable resolve host “ http://url.com/ ”: no address associated hostname) my code given below main activity public static string rslt=""; /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); button b1=(button)findviewbyid(r.id.button1); final alertdialog ad=new alertdialog.builder(this).create(); b1.setonclicklistener(new onclicklistener() { @override public void onclick(view arg0) { // todo auto-generated method stub try { ...
Read more