What does bundle mean in Android? [duplicate]

Answer 1

Bundle is generally used for passing data between various component. Bundle class which can be retrieved from the intent via the getExtras() method.

You can also add data directly to the Bundle via the overloaded putExtra() methods of the Intent objects. Extras are key/value pairs, the key is always of type String. As value you can use the primitive data types.

The receiving component can access this information via the getAction() and getData() methods on the Intent object. This Intent object can be retrieved via the getIntent() method. And the component which receives the intent can use the getIntent().getExtras() method call to get the extra data.

MainActivity

Intent intent = new Intent(MainActivity.this,SecondActivity.class);

Bundle bundle = new Bundle();

bundle.putString(“Key“, myValue);

intent.putExtras(bundle);

startActivity(intent);

SecondActivity

Bundle bundle = getIntent().getExtras();

String myValue= bundle.getString(“key“);