Android 打电话程序

/** * 打电话程序 * @author Administrator * */public class CallActivity extends Activity implements OnClickListener {    private Button button;    private EditText editText;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        button = new Button(this);        button.setText("call");        editText = new EditText(this);        button.setOnClickListener(this);    }    @Override    public void onClick(View v) {        String phoneNum = editText.getText().toString();        Intent intent = new Intent();        intent.setAction(Intent.ACTION_CALL);        intent.setData(Uri.parse("tel:"+ phoneNum));        startActivity(intent);    }}