Question

I’m very new to android and I’m following this example.

The code says we need to do these steps to get an dialog box:

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

// 2. Chain together various setter methods to set the dialog characteristics
builder.setMessage(R.string.dialog_message)
       .setTitle(R.string.dialog_title);

// 3. Get the AlertDialog from create()
AlertDialog dialog = builder.create();

But where does the getActivity() method is defined?

I can’t find that method.

Answer 1

The getActivity() method gives the context of the Activity. You can use YourActivityName.this instead of it.

The method getActivity() is normally used in fragments to get the context of the activity in which they are inserted or inflated.

eg

AlertDialog.Builder builder = new AlertDialog.Builder(YourActivityName.this);

or if you are writing the code in your activity itself even

AlertDialog.Builder builder = new AlertDialog.Builder(this);

will workout. Please feel free to ask any doubts