Android app: Basic accelerometer

StartActivity.java

public class StartActivity extends ActionBarActivity {

    public static final String URL = "restURL"; //Default url to post data
    private EditText restURL;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        // show first layout called activity_start.xml 
        setContentView(R.layout.activity_start); 

        // get url value from field 'editURL'
        restURL = (EditText) findViewById(R.id.editURL);

        // declare start button
        Button myButton = (Button) findViewById(R.id.button_start);
        myButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                
                //after click on button we switch to AccelerometerActivity class 
                //with parameter restURL 
                intent.setClass(StartActivity.this, AccelerometerActivity.class); 
                intent.putExtra(URL, restURL.getText().toString());
                startActivity(intent);
            }
        });
    }
}