package?com.fang.mobileqq;
import?com.fang.mobileqq.R;
import?com.fang.mobileqq.R.id;
import?android.app.Activity;
import?android.content.Intent;
import?android.os.Bundle;
import?android.view.View;
import?android.view.View.OnClickListener;
import?android.widget.Button;
import?android.widget.EditText;
public?class?cal?extends?Activity?implements?OnClickListener{
?EditText?t1;
?Button?bt1,bt2,bt3,bt4,bt5,bt6,bt7,bt8,bt9,bt0;
?Button?btplus,btminus,btmultiply,btdivide,btpoint,btclear,btdel,btequal;
?boolean?clear_flag;//清空標識
?@Override
protected?void?onCreate(Bundle?savedInstanceState)??{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.activity_main);
????????bt0=(Button)?findViewById(R.id.button16);
????????bt1=(Button)?findViewById(R.id.button13);
????????bt2=(Button)?findViewById(R.id.button14);
????????bt3=(Button)?findViewById(R.id.button15);
????????bt4=(Button)?findViewById(R.id.button9);
????????bt5=(Button)?findViewById(R.id.button10);
????????bt6=(Button)?findViewById(R.id.button11);
????????bt7=(Button)?findViewById(R.id.button5);
????????bt8=(Button)?findViewById(R.id.button6);
????????bt9=(Button)?findViewById(R.id.button7);
????????btplus=(Button)?findViewById(R.id.button12);
????????btminus=(Button)?findViewById(R.id.button8);
????????btmultiply=(Button)?findViewById(R.id.button4);
????????btdivide=(Button)?findViewById(R.id.button3);
????????btpoint=(Button)?findViewById(R.id.button17);
????????btclear=(Button)?findViewById(R.id.button1);
????????btdel=(Button)?findViewById(R.id.button2);
????????btequal=(Button)?findViewById(R.id.button18);
????????t1=(EditText)?findViewById(R.id.editText1);
????????
????????bt0.setOnClickListener(this);
????????bt1.setOnClickListener(this);
????????bt2.setOnClickListener(this);
????????bt3.setOnClickListener(this);
????????bt4.setOnClickListener(this);
????????bt5.setOnClickListener(this);
????????bt6.setOnClickListener(this);
????????bt7.setOnClickListener(this);
????????bt8.setOnClickListener(this);
????????bt9.setOnClickListener(this);
????????btplus.setOnClickListener(this);
????????btminus.setOnClickListener(this);
????????btmultiply.setOnClickListener(this);
????????btdivide.setOnClickListener(this);
????????btpoint.setOnClickListener(this);
????????btclear.setOnClickListener(this);
????????btdel.setOnClickListener(this);
????????btequal.setOnClickListener(this);
}
@Override
public?void?onClick(View?v)?{
//?TODO?Auto-generated?method?stub
String?str=t1.getText().toString();
switch(v.getId()){
case?R.id.button16:
case?R.id.button13:
case?R.id.button14:
case?R.id.button15:
case?R.id.button9:
case?R.id.button10:
case?R.id.button11:
case?R.id.button5:
case?R.id.button6:
case?R.id.button7:
case?R.id.button17:
if(clear_flag){
clear_flag=false;
str="";
t1.setText("");
}
??t1.setText(str+((Button)v).getText());
???break;
case?R.id.button12:
case?R.id.button8:
case?R.id.button4:
case?R.id.button3:
if(clear_flag){
clear_flag=false;
str="";
t1.setText("");
}
t1.setText(str+"?"+((Button)v).getText()+"?");
break;
case?R.id.button2:
if(clear_flag){
clear_flag=false;
str="";
t1.setText("");
}
else?if(str!=null&&!str.equals("")){
t1.setText(str.substring(0,str.length()-1));
}
????break;
case?R.id.button1:
clear_flag=false;
str="";
????t1.setText("?");
break;
case?R.id.button18:
getResult();
break;
??}
}
private?void?getResult(){
String?exp=t1.getText().toString();
if(exp==null||exp.equals("?")){
return;
}
if(!exp.contains("?")){
return;
}
if(clear_flag){
clear_flag=false;
return;
}
clear_flag=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(".")&&!op.equals('/')){
int?r=(int)result;
t1.setText(r+"");
}else{
t1.setText(result+"");}
}else?if(!s1.equals("")&&s2.equals("")){
t1.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;
t1.setText(r+"?");
}else{
t1.setText(result+"?");
}
}else{
t1.setText("");
}
?}
}
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