Question

How to edit xml files within layout directory in android. And how can I use controls (defined in xml file) in my java code.

Answer 1

If you are using Eclipse, double click on the XML file, it will be opened in the editing pan at the right side. You can edit it in either Graphical Layout or XML by clicking on the tabs below.

Update: You can use the controls (or widgets) defined in XML file in Java code in the following way. Say, you’ve defined an EditText element with android:id="@+id/textFirstName", you can access this in code like this,

EditText textFirstName = (EditText) findViewById(R.id.textFirstName);
textFirstName.setText("Bugatti");