- Aug 25, 2011
- 2
- 0
- 18,510
This is my project for this coming finals
What i've been trying to do is exactly how the windows 7 calculator works
(for windows users run -> calc then select view and choose programmer)
converting from any base(bin,hex,oct,dec) to any base(bin,hex,oct,dec). But a bonus feature would be adding solutions
I've managed to make progress but i still lack alot
I wanna ask you guys, if could help me in debugging some stuffs like when i mash the decimal button, the inputted values just increases, also i need help in some validation, like blocking numbers 3-9 when your converting from binary
What i've been trying to do is exactly how the windows 7 calculator works
(for windows users run -> calc then select view and choose programmer)
converting from any base(bin,hex,oct,dec) to any base(bin,hex,oct,dec). But a bonus feature would be adding solutions
I've managed to make progress but i still lack alot
I wanna ask you guys, if could help me in debugging some stuffs like when i mash the decimal button, the inputted values just increases, also i need help in some validation, like blocking numbers 3-9 when your converting from binary
Code:
package com.example.numbersys;
import java.util.Stack;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.TextView;
import android.text.Editable;
import android.text.TextWatcher;
public class MyActivity extends Activity implements TextWatcher
{
EditText txtDecimal;
TextView txtBinary,txtOctal,txtHexadecimal,finnsol,octsol,hexsol;
long continv = 0, bse, res, multi, tobemul;
int cur_selected=R.id.chdec,ctr,ctr2,ctr3,txtlen,rseto;
String txt, errcde;
char invchar;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
txtDecimal=(EditText)findViewById(R.id.txtDecimal);
txtBinary=(TextView)findViewById(R.id.txtBinary);
txtOctal=(TextView)findViewById(R.id.txtOctal);
txtHexadecimal=(TextView)findViewById(R.id.txtHexadecimal);
txtDecimal.addTextChangedListener(this);
finnsol=(TextView)findViewById(R.id.finnsol);
}
public void beforeTextChanged(CharSequence sequence,int start,int count,int after)
{
}
public void afterTextChanged(Editable editable)
{
}
public void onTextChanged(CharSequence sequence,int start,int before,int count)
{
}
public void calculate(int base,TextView txtView,TextView texsol)
{
StringBuffer solb = new StringBuffer();
if(txtDecimal.getText().toString().trim().length()==0)
{
txtView.setText("");
texsol.setText("");
return;
}
try
{
Stack<Object> stack=new Stack<Object>();
int number=Integer.parseInt(txtDecimal.getText().toString());
while (number>0)
{
int remainder=number%base; // find remainder
solb.append(remainder + " = " + number + " % " + base + "\n");
if(remainder<10)
{
stack.push(remainder);
}
else
{
switch (remainder)
{
case 10:
stack.push("A");
break;
case 11:
stack.push("B");
break;
case 12:
stack.push("C");
break;
case 13:
stack.push("D");
break;
case 14:
stack.push("E");
break;
case 15:
stack.push("F");
break;
}
}
number/=base;
}
StringBuffer buffer=new StringBuffer();
while (!stack.isEmpty())
{
buffer.append(stack.pop().toString());
}
solb.append("Result : " + buffer.toString());
txtDecimal.setText(buffer.toString());
texsol.setText(solb.toString());
}
catch (Exception e)
{
txtView.setText(e.getMessage());
}
}
private void decitobin()
{ txt=txtDecimal.getText().toString();
bse = 2;
StringBuffer solb = new StringBuffer();
txtlen = txt.length();
//tobecnvrt = Integer.parseInt(txt);
rseto = txtlen - 2;
for (ctr2 = 0 ; ctr2 <= txtlen - 1 ; ctr2++)
{
if (ctr2 < txtlen - 1)
{
multi = bse;
}
else
{
multi = 1;
}
for (ctr3 = rseto ; ctr3 > 0 ; ctr3--)
{
multi *= bse;
}
rseto--;
tobemul = Character.digit(txt.charAt(ctr2),10);
res += (tobemul * multi);
}
solb.append(res + "=" + tobemul + "*" + multi + "\n");
txtDecimal.setText(String.valueOf(res));
//solb.append("Result : " + buffer.toString());
//texsol.setText(solb.toString());
}
public void onRadioButtonClicked(View view) {
// Is the button now checked?
boolean checked = ((RadioButton) view).isChecked();
if (cur_selected != view.getId()){
// Check which radio button was clicked
switch(view.getId()) {
case R.id.chbin:
if (checked)
calculate(2,txtBinary,finnsol);
cur_selected = R.id.chbin;
break;
case R.id.choct:
if (checked)
calculate(8,txtOctal,finnsol);
cur_selected = R.id.choct;
break;
case R.id.chhex:
if (checked)
calculate(16,txtHexadecimal,finnsol);
cur_selected = R.id.chhex;
break;
case R.id.chdec:
if (checked)
cur_selected=R.id.chdec;
decitobin();
break;
}
}
}
}
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