public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,

long arg3) {

// TODO Auto-generated method stub

String[] lan = getResources().getStringArray(R.array.signed);

Toast.makeText(MainActivity.this, "你選擇的是： " + lan[arg2],?

Toast.LENGTH_LONG).show();

}

******

public void CalcStart(View v) {

? ? Log.d("TAG", "CalcStart()");

? ?

? ? EditText num1Edit = (EditText) findViewById(R.id.num1EDIT);

? ? String strNum1 = num1Edit.getText().toString();

? ? int num1 = Integer.parseInt(strNum1);

? ?

? ? EditText num2Edit = (EditText) findViewById(R.id.num2EDIT);

? ? String strNum2 = num2Edit.getText().toString();

? ? int num2 = Integer.parseInt(strNum2);

? ? if ( 這里應該怎么調用.equals("+") ){

? ? int result = num1 + num2;

? ? }

? ? else if ( ){

? ? int result = num1 * num2;

? ? }

? ? else if (){

? ? int result = num1 - num2;

? ? }

? ? else if(){

? ? int result = num1 / num2;

? ? }

? ? int result = num1 * num2;

? ? TextView resultText = (TextView) findViewById(R.id.resultTXT);

? ? resultText.setText("= " + result);

? ?

? ? }