android studio实现简单的计算器（无bug）

2023-07-18 00:23:04 72
本文实例为大家分享了androidstudio实现简单计算器的具体代码，供大家参考，具体内容如下
1.效果图
2布局代码
3.逻辑代码
packagecom.example.myzhuoye;

importandroid.os.Bundle;
importandroid.view.View;
importandroid.widget.Button;
importandroid.widget.EditText;

importandroidx.annotation.Nullable;
importandroidx.appcompat.app.AppCompatActivity;

publicclassJiSuanJiextendsAppCompatActivityimplementsView.OnClickListener{
//结果
privateEditTextET001,ET002;
//数字0-9
privateButtonbtn0018,btn0013,btn0014,btn0015,btn009,btn0010,btn0011,btn005,btn006,btn007;
//运算符,+,-,×，÷,.,=;清除,返回
privateButtonbtn0012,btn008,btn003,btn002,btn0019,btn0016,btn001,btn004;
privateStringtext="";//保存输入的数字和符号
privateDoubleresult=0.0;//输出结果


@Override
protectedvoidonCreate(@NullableBundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.layout4);
//结果
ET001=(EditText)findViewById(R.id.ET001);
ET002=(EditText)findViewById(R.id.ET002);
//数字0-9
btn0013=(Button)findViewById(R.id.btn0013);
btn0014=(Button)findViewById(R.id.btn0014);
btn0015=(Button)findViewById(R.id.btn0015);
btn009=(Button)findViewById(R.id.btn009);
btn0010=(Button)findViewById(R.id.btn0010);
btn0011=(Button)findViewById(R.id.btn0011);
btn005=(Button)findViewById(R.id.btn005);
btn006=(Button)findViewById(R.id.btn006);
btn007=(Button)findViewById(R.id.btn007);
btn0018=(Button)findViewById(R.id.btn0018);
//运算符
btn004=(Button)findViewById(R.id.btn004);
btn0012=(Button)findViewById(R.id.btn0012);
btn008=(Button)findViewById(R.id.btn008);
btn003=(Button)findViewById(R.id.btn003);
btn002=(Button)findViewById(R.id.btn002);
btn0019=(Button)findViewById(R.id.btn0019);
btn0016=(Button)findViewById(R.id.btn0016);
btn001=(Button)findViewById(R.id.btn001);
//添加点击事件
btn0013.setOnClickListener((View.OnClickListener)this);
btn0014.setOnClickListener((View.OnClickListener)this);
btn0015.setOnClickListener((View.OnClickListener)this);
btn009.setOnClickListener((View.OnClickListener)this);
btn0010.setOnClickListener((View.OnClickListener)this);

btn0011.setOnClickListener((View.OnClickListener)this);
btn005.setOnClickListener((View.OnClickListener)this);
btn006.setOnClickListener((View.OnClickListener)this);
btn007.setOnClickListener((View.OnClickListener)this);
btn0018.setOnClickListener((View.OnClickListener)this);

btn0012.setOnClickListener((View.OnClickListener)this);
btn008.setOnClickListener((View.OnClickListener)this);
btn003.setOnClickListener((View.OnClickListener)this);
btn002.setOnClickListener((View.OnClickListener)this);
btn0019.setOnClickListener((View.OnClickListener)this);

btn0016.setOnClickListener((View.OnClickListener)this);
btn001.setOnClickListener((View.OnClickListener)this);
btn004.setOnClickListener((View.OnClickListener)this);
}

@Override
publicvoidonClick(Viewv){
Stringstring=ET001.getText().toString();
switch(v.getId()){
caseR.id.btn0018://0
num(0);
break;
caseR.id.btn0013://1
num(1);
break;
caseR.id.btn0014://2
num(2);
break;
caseR.id.btn0015://3
num(3);
break;
caseR.id.btn009://4
num(4);
break;
caseR.id.btn0010://5
num(5);
break;
caseR.id.btn0011://6
num(6);
break;
caseR.id.btn005://7
num(7);
break;
caseR.id.btn006://8
num(8);
break;
caseR.id.btn007://9
num(9);
break;
caseR.id.btn0019://.
dot();
break;
caseR.id.btn0012://+
add();
break;
caseR.id.btn008://-
sub();
break;
caseR.id.btn003://"*"
multiply();
break;
caseR.id.btn002://除
divide();
break;
caseR.id.btn001://清除
clear();
break;
caseR.id.btn004://返回
back();
break;
//计算结果
caseR.id.btn0016://结果
result();
break;
default:
break;
}
ET001.setText(text);
ET002.setText(String.valueOf(result));
}
privatevoidnum(inti){
text=text+String.valueOf(i);
}

privatevoiddot(){

inta=text.length();
Strings01="+";
Strings02="-";
Strings03="×";
Strings04="÷";
Strings05=".";
if(a!=0){
Strings=text.substring(a-1,a);
Strings0=text.substring(0,a-1);
if(s01.equals(s)||s02.equals(s)||s03.equals(s)||s04.equals(s)||s05.equals(s)){
text=s0+".";
}else{
text+=".";
}
}else{
text="";
result=0.0;
ET001.setText("");
ET002.setText("");
}
}

privatevoidclear(){

text="";
result=0.0;
ET001.setText("");
ET002.setText("");

}

privatevoidback(){
if(text.length()!=0){
Stringstr=text.substring(0,text.length()-1);
text=str;
}

;

}

privatevoidadd(){
inta=text.length();

Strings01="+";
Strings02="-";
Strings03="×";
Strings04="÷";
Strings05=".";
if(a!=0){
Strings=text.substring(a-1,a);
Strings0=text.substring(0,a-1);
if(s01.equals(s)||s02.equals(s)||s03.equals(s)||s04.equals(s)||s05.equals(s)){
text=s0+"+";
}else{
text+="+";
}
}else{
text="";
result=0.0;
ET001.setText("");
ET002.setText("");
}

}

privatevoidsub(){
inta=text.length();
Strings01="+";
Strings02="-";
Strings03="×";
Strings04="÷";
Strings05=".";
if(a!=0){
Strings=text.substring(a-1,a);
Strings0=text.substring(0,a-1);
if(s01.equals(s)||s02.equals(s)||s03.equals(s)||s04.equals(s)||s05.equals(s)){
text=s0+"-";
}else{
text+="-";
}
}else{
text="";
result=0.0;
ET001.setText("");
ET002.setText("");
}

}

privatevoidmultiply(){

inta=text.length();
Strings01="+";
Strings02="-";
Strings03="×";
Strings04="÷";
Strings05=".";
if(a!=0){
Strings=text.substring(a-1,a);
Strings0=text.substring(0,a-1);
if(s01.equals(s)||s02.equals(s)||s03.equals(s)||s04.equals(s)||s05.equals(s)){
text=s0+"×";
}else{
text+="×";
}
}else{
text="";
result=0.0;
ET001.setText("");
ET002.setText("");
}

}

privatevoiddivide(){

inta=text.length();
Strings01="+";
Strings02="-";
Strings03="×";
Strings04="÷";
Strings05=".";
if(a!=0){
Strings=text.substring(a-1,a);
Strings0=text.substring(0,a-1);
if(s01.equals(s)||s02.equals(s)||s03.equals(s)||s04.equals(s)||s05.equals(s)){
text=s0+"÷";
}else{
text+="÷";
}
}else{
text="";
result=0.0;
ET001.setText("");
ET002.setText("");
}
}

//计算输出结果
privatevoidresult(){
result=testOperation(text);
}


publicDoubletestOperation(Strings){
//分割字符然后放进数组
Strings1=s.replace("+","-");
String[]str=s1.split("-");
doubletotal1=0;
//先遍历数组，把里面的乘除结果算出来
for(Stringstr1:str){
if(str1.contains("×")||str1.contains("÷")){
doubletotal=0;
for(inti=0;i
4.XML文件

















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android studio实现简单的计算器（无bug）

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