Simple example for Intent and Bundle

Question

I'm new to android with almost no knowledge about Java and XML. I'm learning it through pdfs that i'm getting on net. I have learnt about Toast, a bit about Intents but me not able to understand anything about Bundles. I have understood that they are used to pass data from one activity to another but I'm not able to implement this.

please give a simple example to implement the same.

as for example I have just created two activities namely , Main_Activity and Other_Activity, and i haven't done anything to them yet.

Please give the simplest example so that i can learn to implement.

Thanks in advance!!

Activity xml tags are children of application. This threw me. — mikeLundquist, Jul 18 '17 at 21:42

Dany Pop · Accepted Answer · 2016-03-15T10:23:27.573

For example :

In MainActivity :

Intent intent = new Intent(this, OtherActivity.class);
intent.putExtra(OtherActivity.KEY_EXTRA, yourDataObject);
startActivity(intent);

In OtherActivity :

public static final String KEY_EXTRA = "com.example.yourapp.KEY_BOOK";

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  String yourDataObject = null;

  if (getIntent().hasExtra(KEY_EXTRA)) {
      yourDataObject = getIntent().getStringExtra(KEY_EXTRA);
  } else {
      throw new IllegalArgumentException("Activity cannot find  extras " + KEY_EXTRA);
  }
  // do stuff
}

More informations here : http://developer.android.com/reference/android/content/Intent.html

score 24 · Answer 2 · answered Feb 14 '13 at 13:58

24

Try this: if you need pass values between the activities you use this...

This is code for Main_Activity put the values to intent

 String name="aaaa";
 Intent intent=new Intent(Main_Activity.this,Other_Activity.class);
 intent.putExtra("name", name);
 startActivity(intent);

This code for Other_Activity and get the values form intent

    Bundle b = new Bundle();
    b = getIntent().getExtras();
    String name = b.getString("name");

answered Feb 14 '13 at 13:58

Android_coder

9,953
3
17
23

3

Note that 2 of the lines of code above can be made into 1: `Bundle b= getIntent().getExtras();` – Al Lelopath Jan 19 '16 at 18:33
When you are retrieving from a bundle, get it as – Akhil Ghatiki Apr 11 '19 at 17:11

score 8 · Answer 3 · answered Feb 14 '13 at 13:59

Basically this is what you need to do:
in the first activity:

Intent intent = new Intent();
intent.setAction(this, SecondActivity.class);
intent.putExtra(tag, value);
startActivity(intent);

and in the second activtiy:

Intent intent = getIntent();
intent.getBooleanExtra(tag, defaultValue);
intent.getStringExtra(tag, defaultValue);
intent.getIntegerExtra(tag, defaultValue);

one of the get-functions will give return you the value, depending on the datatype you are passing through.

Simple example for Intent and Bundle

3 Answers3

Linked