Код для расчета процентного нерабочего

Question

Не знаю, как получить результат от цена и процентов чтобы показать цену после скидки!

 // write the percentage 
    final EditText editPrice = (EditText) findViewById(R.id.editPrice); 
    // write the price 
    final EditText ePercent = (EditText) findViewById(R.id.ePercent); 
    // Hopefully to get the result 
    final TextView result = (TextView) findViewById(R.id.viewResult); 

    Button buttonConvert = (Button) findViewById(R.id.buttonConvert); 
    buttonConvert.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      try { 
       double price = Double.valueOf(editPrice.getText() 
         .toString()); 
       // percent 
       double per = (price/100.0f) * ePercent;; 

       result.setText(String.valueOf(per)); 

Любая помощь! Спасибо!

Answer 1

Попробуйте это ..

  // getting value from editPrice and parsing to double 
      double price = Double.parseDouble(editPrice.getText().toString()); 

      // same like that getting value from ePercent and parsing to double 
      double ePer = Double.parseDouble(ePercent.getText().toString()); 

      // percent 
      double per = (price/100.0f) * ePer;; 

      result.setText(String.valueOf(per)); 
      // or 
      result.setText(""+per); 

Answer 2

Button buttonConvert = (Button) findViewById(R.id.buttonConvert); 
buttonConvert.setOnClickListener(new OnClickListener() { 

    @Override 
    public void onClick(View v) { 
      double price = Double.parseDouble(editPrice.getText() 
        .toString()); 
      // percent 
      double ePercent = Double.parseDouble(ePercent.getText() 
        .toString()); 

      //if ePercent between 0 and 1 
       double result = price * (1.0f - ePercent); 
      //if ePercent between 0 and 100 
       double result = price * ((100.0f - ePercent)/100.0f); 

      result.setText(String.valueOf(result)); 
    } 
}