我是java新手,请问如何使editText显示小数?我正在制作一个类似于Atm机器的屏幕,它显示十进制为00.00
这是我写的代码,它只显示输入号码:
public class ATMain extends Activity {
// declare a btntype for the button
View.OnClickListener btnType = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) { //to enable the input show the value in edittext after click it
case R.id.btnOne:
value = value + 1;
extNum.setText(value);
break;
case R.id.btnTwo:
value = value + 2;
extNum.setText(value);
break;
case R.id.btnThree:
value = value + 3;
extNum.setText(value);
break;
case R.id.btnFour:
value = value + 4;
extNum.setText(value);
break;
case R.id.btnFive:
value = value + 5;
extNum.setText(value);
break;
case R.id.btnSix:
value = value + 6;
extNum.setText(value);
break;
case R.id.btnSeven:
value = value + 7;
extNum.setText(value);
break;
case R.id.btnEight:
value = value + 8;
extNum.setText(value);
break;
case R.id.btnNine:
value = value + 9;
extNum.setText(value);
break;
case R.id.btnTen:
value = value + 0;
extNum.setText(value);
break;
case R.id.btnTTen:
value = value + 0 + "" + 0;
extNum.setText(value);
break;
case R.id.btnClear: // to clear the data input
extNum.setText("");
value = "";
break;
}
}
};
假设value
是Double
,
而不是使用extNum.setText(value);
你可以使用这个:
extNum.setText( String.format( "%.2f", value) );