How to start an Intent by passing some parameters to it

Question

I would like to pass some variables in the constructor of my ListActivity    I start activity via this code   startActivity new Intent  this  viewContacts class      I would like to use similar code  but to pass two strings to the constructor  How is possible

User · Accepted Answer

In order to pass the parameters you create new intent and put a parameter map:

Intent myIntent = new Intent(this, NewActivityClassName.class);
myIntent.putExtra("firstKeyName","FirstKeyValue");
myIntent.putExtra("secondKeyName","SecondKeyValue");
startActivity(myIntent);

In order to get the parameters values inside the started activity, you must call the get[type]Extra() on the same intent:

// getIntent() is a method from the started activity
Intent myIntent = getIntent(); // gets the previously created intent
String firstKeyName = myIntent.getStringExtra("firstKeyName"); // will return "FirstKeyValue"
String secondKeyName= myIntent.getStringExtra("secondKeyName"); // will return "SecondKeyValue"

If your parameters are ints you would use getIntExtra() instead etc. Now you can use your parameters like you normally would.

User · Answer

I think you want something like this   Intent foo   new Intent this  viewContacts class   foo putExtra  myFirstKey    myFirstValue    foo putExtra  mySecondKey    mySecondValue    startActivity foo     or you can combine them into a bundle first   Corresponding getExtra   routines exist for the other side   See the intent topic in the dev guide for more information

User · Answer

putExtra     This method sends the data to another activity and in parameter  we have to pass key-value pair  Syntax  intent putExtra  quot key quot   value   Eg  intent putExtra  quot full name quot    quot Vishnu Sivan quot    Intent intent getIntent     It gets the Intent from the previous activity  fullname   intent getStringExtra    full name       This line gets the string form previous activity and in parameter  we have to pass the key which we have mentioned in previous activity  Sample Code  Intent intent   new Intent getApplicationContext    MainActivity class   intent putExtra  quot firstName quot    quot Vishnu quot    intent putExtra  quot lastName quot    quot Sivan quot    startActivity intent

[android] How to start an Intent by passing some parameters to it?

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