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ϱßÊÇÏêϸCurrentConverter Activity µÄ±àÂë:

1 import android.app.Activity;

2 import android.os.Bundle;

3 import android.view.View;

4 import android.view.View.OnClickListener;

5 import android.widget.Button;

6 import android.widget.RadioButton;

7 import android.widget.TextView;

8

9 public class CurrencyConverter extends Activity implements OnClickListener {

10 TextView dollars;

11 TextView euros;

12 RadioButton dtoe;

13 RadioButton etod;

14 Button convert;

15

16

17 @Override

18 public void onCreate(Bundle icicle) {

19 Super.onCreate(icicle);

20 setContentView(R.layout.main);

21

22 dollars = (TextView)this.findViewById(R.id.dollars);

23 euros = (TextView)this.findViewById(R.id.euros);

24

25 dtoe = (RadioButton)this.findViewById(R.id.dtoe);

26 dtoe.setChecked(true);

27 etod = (RadioButton)this.findViewById(R.id.etod);

28

29 convert = (Button)this.findViewById(R.id.convert);

30 convert.setOnClickListener(this);

31 }

32

33 public void onClick(View v) {

34 if (dtoe.isChecked()) {

35 convertDollarsToEuros();

36 }

37 if (etod.isChecked()) {

38 convertEurosToDollars();

39 }

40 }

41

42 protected void convertDollarsToEuros() {

43 double val = Double.parseDouble(dollars.getText().toString());

44 // in a real app, wed get this off the net

45 euros.setText(Double.toString(val*0.67));

46 }

47

48 protected void convertEurosToDollars() {

49 double val = Double.parseDouble(euros.getText().toString());

50 // in a real app, wed get this off the net

51 dollars.setText(Double.toString(val/0.67));

52 }

53 }

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