@Override
protected void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    final EditText editText = (EditText) findViewById(R.id.editText);
    final EditText editText2 = (EditText) findViewById(R.id.editText2);


    Button button2 = (Button) findViewById(R.id.button2);
    button2.setOnClickListener(new View.OnClickListener()
    {
        @Override
        public void onClick (View arg0) 
        {
            editText.setText("");
            editText2.setText("");
        }
    });

    Button button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener()


            {


                 @Override
                public void onClick (View arg0)
            {

                  String check = editText.getText().toString();
                  String check2 = editText2.getText().toString();
                  InputMethodManager inputManager = (InputMethodManager)
                  getSystemService(Context.INPUT_METHOD_SERVICE);

                inputManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(),
                        InputMethodManager.HIDE_NOT_ALWAYS);

                if (check.matches("") && check2.matches("") )
                {
                    Toast.makeText(getApplicationContext(), "Please enter a value!", Toast.LENGTH_SHORT).show();
                }
                else if (check2.matches(""))
                {

                    double centimeters = Double.valueOf(editText.getText().toString());
                    double inches = centimeters * 0.393701;

                    editText2.setText(String.valueOf(inches));
                }
                else if (check.matches(""))
                {

                    double inches = Double.valueOf(editText2.getText().toString());
                    double centimeters = inches * 2.54;

                    editText.setText(String.valueOf(centimeters));
                }
            }
    });



}