Android - 两个小数点 [重复]

Question

我正在创建一个货币转换应用程序。我想在小数点后得到答案。

这是我的代码：-

public class MainActivity extends AppCompatActivity {

    public void pri (View view){

        EditText amount = findViewById(R.id.amount);

        Double amout =  Double.parseDouble(amount.getText().toString());

        Double samount = amout * 180;


        Toast.makeText(MainActivity.this, "S. " + rsamount.toString(), Toast.LENGTH_SHORT).show();

        Log.i("price", amount.getText().toString());

    }

谢谢！

Answer 1

试试这个

EditText amount = findViewById(R.id.amount);

int amout =  Integer.parseInt(amount.getText().toString());

int samount = amout * 180;

String converted = new DecimalFormat("0.00").format(samount);

Answer 2

下面是kotlin中转换两位小数点的函数。

fun roundOffDecimal(number: Double): Double? {
        val df = DecimalFormat("#.##")
        df.roundingMode = RoundingMode.CEILING
        return df.format(number).toDouble()
    }