为啥做出来后无论几加几都等于0.0
private void getresult(){
String exp=text1.getText().toString();
if(exp==null||exp.equals("")){
return;
}
if(!exp.contains(" ")){
return;
}
if(clear){
clear=false;
return;
}
clear=true;
double result=0;
String s1=exp.substring(0,exp.indexOf(" "));
String op=exp.substring(exp.indexOf("")+1, exp.indexOf("")+2);
String s2=exp.substring(exp.indexOf("")+3);
if(!s1.equals("")&&!s2.equals("")){
double d1=Double.parseDouble(s1);
double d2=Double.parseDouble(s2);
if(op.equals("+")){
result=d1+d2;
}else if(op.equals("-")){
result=d1-d2;
}else if(op.equals("×")){
result=d1*d2;
}else if(op.equals("÷")){
if(d2==0){
result=0;
}else {
result=d1/d2;
}
}
if(s1.contains(".")&&!s2.contains(".")){
int r=(int)result;
text1.setText(r+"");
}else{
text1.setText(result+"");
}
}else if (!s1.equals("")&&s2.equals("")) {
text1.setText(exp);
}else if (s1.equals("")&&!s2.equals("")) {
double d2=Double.parseDouble(s2);
if(op.equals("+")){
result=0+d2;
}else if(op.equals("-")){
result=0-d2;
}else if(op.equals("×")){
result=0;
}else if(op.equals("÷")){
result=0;
}
if(!s2.contains(".")){
int r=(int)result;
text1.setText(r+"");
}else{
text1.setText(result+"");
}
}else if(!s1.equals("")&&s2.equals("")){
}
else if (s1.equals("")&&!s2.equals("")) {
double d2=Double.parseDouble(s2);
if(op.equals("+")){
result=0+d2;
}else if(op.equals("-")){
result=0-d2;
}else if(op.equals("×")){
result=0;
}else if(op.equals("÷")){
result=0;
}
if(!s2.contains(".")){
int r=(int)result;
text1.setText(r+"");
}else{
text1.setText(result+"");
}
}else {
text1.setText("");
}
}
}
