CODEWITHSUNDEEP
android
salih
salih

Reputation: 324

How do i pass object of my own class between activity

I want to pass an object to a new activity from MainActivity

NetworkHandler nH=new NetworkHandler();

nH is my own created class i want to send this object to a new activity

Upvotes: 0

Views: 744

Answers (5)

H4SN
H4SN

Reputation: 1708

if NetworkHandler is Serializable you can serialize object and pass it to another Activity

class NetworkHandler implements Serializable{
....
}

and pass it to another activity in this way

   Bundle bundleObject = new Bundle();
                            Intent i = new Intent(this,SecondActivity.class);
    bundleObject.putSerializable(KEY, (Serializable) new NetworkHandler ());
    i.putExtras(bundleObject);
    startActivity(i);

in second activity onCreate get objet

Bundle bundleObject = getIntent().getExtras();
NetworkHandler  nh = (NetworkHandler) 
                            bundleObject.getSerializable
                                (KEY);

You can also Implement Parcelable interface to NetworkHandler.

Upvotes: 0

Murtaza Khursheed Hussain
Murtaza Khursheed Hussain

Reputation: 15336

Two possible answers

  1. You Can't: Because you can't pass objects from one activity to another (until and unless it is Parcelable) in android

  2. You Can: You can use shared preferences to pass primitive data from one activity to another OR you can use single instance (singleton) class to set/get objects from one place to another.

Upvotes: 1

techierishi
techierishi

Reputation: 390

You can create a class that extends Application class and create a singleton of that object inside it. This way you can access this object in all of your activity.

public class GlobalClass extends Application {

    NetworkHandler nH = null;

        public NetworkHandler getNetworkHandler() {
        if (nH == null) {
            nH = new NetworkHandler();
        }
        return nH;
    }
}

in your AndroidManifest.xml mention the name your class

<application
    android:name=".GlobalClass " >

You can access this object in any class using following code.

GlobalClass gObj = (GlobalClass) this.getApplication();

NetworkHandler nH = gObj.getNetworkHandler()

Upvotes: 0

Chris Handy
Chris Handy

Reputation: 366

If it is to do with network it should really be on its own thread.

However I would probably keep a handle to it in the application of my app, that way it can be used on all activities.

Upvotes: 0

ezaquarii
ezaquarii

Reputation: 1916

When starting new activity, your intent can carry data:

public void sendMessage(View view) {
    Intent intent = new Intent(this, DisplayMessageActivity.class);
    EditText editText = (EditText) findViewById(R.id.edit_message);
    String message = editText.getText().toString();
    intent.putExtra(EXTRA_MESSAGE, message);
}

The problem is, that intent can carry only primitive, Serializable or Parcelable data types. If you have non-serializable objects, like network sockets, you can't send them via Intent extras. In such case you may want to start a Service holding your complex data (sockets, resource handlers, etc) and bind to that service in new activity.

Check out those resources:

Upvotes: 0

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