I recently started android. I came across the putExtra(key,value) method in the Intent class. I don't understand what is the use of key parameter.
I want to pass string value to the other activity. Please help me to exoplain the code. I am using from Android Developer Portal.
Key is used to retrieve data from the second Activity. For example, in the following code snippet you are using YOUR_KEY as a string while sending data along with intent bundle.
Intent intent = new Intent(this, Activity2.class);
String message = editText.getText().toString();
intent.putExtra("YOUR_KEY", message);
startActivity(intent);
In Activity2, you can retrieve the values using
String message = intent.getStringExtra("YOUR_KEY");