Hello sorry, it is very easy to ask my question but I can not solve it, I have a calculator that tries to do the basic operations but, I do not get the second value to perform the operation, I do not understand very well because. Next the code.
public TextView calText;
public double value1, value2, ans;
int operation;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_constraint);
calText=findViewById(R.id.cal_text);
}
public void bt0(View v) {
String cap=calText.getText().toString();
cap=cap+"0";
calText.setText(cap);
}
public void bt1(View v) {
String cap=calText.getText().toString();
cap=cap+"1";
calText.setText(cap);
}
public void bt2(View v) {
String cap=calText.getText().toString();
cap=cap+"2";
calText.setText(cap);
}
public void bt3(View v) {
String cap=calText.getText().toString();
cap=cap+"3";
calText.setText(cap);
}
public void bt4(View v) {
String cap=calText.getText().toString();
cap=cap+"4";
calText.setText(cap);
}
public void bt5(View v) {
String cap=calText.getText().toString();
cap=cap+"5";
calText.setText(cap);
}
public void bt6(View v) {
String cap=calText.getText().toString();
cap=cap+"6";
calText.setText(cap);
}
public void bt7(View v) {
String cap=calText.getText().toString();
cap=cap+"7";
calText.setText(cap);
}
public void bt8(View v) {
String cap=calText.getText().toString();
cap=cap+"8";
calText.setText(cap);
}
public void bt9(View v) {
String cap=calText.getText().toString();
cap=cap+"9";
calText.setText(cap);
}
public void bt_decimal(View v) {
String cap=calText.getText().toString();
cap=cap+",";
calText.setText(cap);
}
public void sum (View v) {
try {
String aux1=calText.getText().toString();
value1=Double.parseDouble(aux1);
}catch (NumberFormatException nfe){
calText.setText("");
operation=1;
}
}
public void rest (View v) {
try {
String aux1=calText.getText().toString();
value1=Double.parseDouble(aux1);
}catch (NumberFormatException nfe){
calText.setText("");
operation=2;
}
}
public void mutliplication (View v) {
try {
String aux1=calText.getText().toString();
value1=Double.parseDouble(aux1);
}catch (NumberFormatException nfe){
calText.setText("");
operation=3;
}
}
public void division (View v) {
try {
String aux1=calText.getText().toString();
value1=Double.parseDouble(aux1);
}catch (NumberFormatException nfe){
calText.setText("");
operation=4;
}
}
public void percent (View v) {
try {
String aux1=calText.getText().toString();
value1=Double.parseDouble(aux1);
}catch (NumberFormatException nfe){
calText.setText("");
operation=5;
}
}
public void equals (View v) {
try {
String aux2 = calText.getText().toString();
value2 = Double.parseDouble(aux2);
} catch (NumberFormatException nfe) {}
calText.setText("");
if (operation==1) {
ans=value1+value2;
}else if (operation==2) {
ans=value1-value2;
}else if (operation==3){
ans=value1*value2;
}else if (operation==4){
if(value2==0){
calText.setText(R.string.error);
}else {
ans=value1/value2;
}
}else if (operation==5) {
ans=value2*(value1*100.0);
}
calText.setText("" + ans);
value1=ans;
}
public void clear (View v) {
calText.setText("");
value1=0;
value2=0;
ans=0;
}
public void erase (View v) {
if (!calText.getText().toString().equals("")){
calText.setText(calText.getText().subSequence(0, calText.getText().length()-1));
}
}
}