Question

I have two activities say X and y. In x there is edittext n 6 radiobutton if user clicks button the value gets retrieved from database based on input from edittext n radiobutton. the values should be displayed in next activity y. can yu pls help in giving snippet..thanks in advance

Answer 1

You can easily pass data from one activity to another using Bundle or Intent.

Lets look at the following example using Bundle:

//creating an intent to call the next activity
Intent i = new Intent("com.example.NextActivity");
Bundle b = new Bundle();

//This is where we put the data, you can basically pass any 
//type of data, whether its string, int, array, object
//In this example we put a string
//The param would be a Key and Value, Key would be "Name"
//value would be "John"
b.putString("Name", "John");

//we put the bundle to the Intent
i.putExtra(b);

startActivity(i, 0);

In “NextActivity” you can retrieve the data using the following code:

Bundle b = getIntent().getExtra();
//you retrieve the data using the Key, which is "Name" in our case
String data = b.getString("Name");

How about using only Intent to transfer data. Lets look at the example

Intent i = new Intent("com.example.NextActivity");
int highestScore = 405;
i.putExtra("score", highestScore);

In “NextActivity” you can retrieve the data:

int highestScore = getIntent().getIntExtra("score");

Now you would ask me, whats the difference between Intent and Bundle, they seems like
they do exactly the same thing.

The answer is yes, they both do exactly the same thing. But if you want to transfer alot of data, variables, large array you would need to use Bundle, as they have more methods for transferring large amount of data.(i.e. If your only passing one or two variable then just go with Intent.