package ymq.demo03;
import android.app.Activity;
import android.os.Bundle;
import android.view.*;
import android.widget.*;
public class demo03 extends Activity {
/** Called when the activity is first created. */
String str="";
EditText et;
int c=0,flag=0;
double b=0.0,g=0.0,f=0.0;
View vi;
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
menu.add(0, 1, 1, "退出");
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
if(item.getItemId()==1){finish();}
return super.onOptionsItemSelected(item);
}
//计算方法
public double calculater(){
switch(c){
case 0:f=g;break;
case 1:f=b+g;break;
case 2:f=b-g;break;
case 3:f=b*g;break;
case 4:f=b/g;break;
}
b=f;
c=0;
return f;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//获得按键
final Button number[]=new Button[10];
final Button fuhao[]=new Button[11];
fuhao[0]=(Button)findViewById(R.id.button01);
fuhao[1]=(Button)findViewById(R.id.button02);
fuhao[2]=(Button)findViewById(R.id.button03);
fuhao[3]=(Button)findViewById(R.id.button04);
fuhao[4]=(Button)findViewById(R.id.button05);
fuhao[5]=(Button)findViewById(R.id.button06);
fuhao[6]=(Button)findViewById(R.id.buttonce);
fuhao[7]=(Button)findViewById(R.id.buttonc);
fuhao[8]=(Button)findViewById(R.id.zheng);
fuhao[9]=(Button)findViewById(R.id.kaifang);
fuhao[10]=(Button)findViewById(R.id.pingfang);
number[0]=(Button)findViewById(R.id.button0);
number[1]=(Button)findViewById(R.id.button1);
number[2]=(Button)findViewById(R.id.button2);
number[3]=(Button)findViewById(R.id.button3);
number[4]=(Button)findViewById(R.id.button4);
number[5]=(Button)findViewById(R.id.button5);
number[6]=(Button)findViewById(R.id.button6);
number[7]=(Button)findViewById(R.id.button7);
number[8]=(Button)findViewById(R.id.button8);
number[9]=(Button)findViewById(R.id.button9);
et=(EditText) findViewById(R.id.textView1);
et.setText(str);
fuhao[6].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
str="";
et.setText(str);
vi=v;
}
});
fuhao[7].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
b=0.0;c=0;g=0.0;
str="";
et.setText(str);
}
});
fuhao[8].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(vi!=fuhao[5]&&str!=""){
char ch=str.charAt(0);
if(ch=='-')
str=str.replace("-","");
else
str="-"+str;
et.setText(str);
}
}
});
fuhao[9].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(str!=""){
double a=Double.parseDouble(str);
str=Math.sqrt(a)+"";
et.setText(str);
}}
});
fuhao[10].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(str!=""){
double a=Double.parseDouble(str);
str=""+a*a;
et.setText(str);
}}
});
//设定数字按键
number[0].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=0;
et.setText(str);
flag=0;
}
else{
char ch1[];
ch1=str.toCharArray();
if(!(ch1.length==1&&ch1[0]=='0'))
{str+=0;
et.setText(str);}
}
vi=v;
}
});
number[1].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=1;
et.setText(str);
flag=0;
}
else{
str+=1;
et.setText(str);
}
vi=v;
}
});
number[2].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=2;
et.setText(str);
flag=0;
}
else{
str+=2;
et.setText(str);
}
vi=v;
}
});
number[3].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=3;
et.setText(str);
flag=0;
}
else{
str+=3;
et.setText(str);
}
vi=v;
}
});
number[4].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=4;
et.setText(str);
flag=0;
}
else{
str+=4;
et.setText(str);
}
vi=v;
}
});
number[5].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=5;
et.setText(str);
flag=0;
}
else{
str+=5;
et.setText(str);
}
vi=v;
}
});
number[6].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=6;
et.setText(str);
flag=0;
}
else{
str+=6;
et.setText(str);
}
vi=v;
}
});
number[7].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=7;
et.setText(str);
flag=0;
}
else{
str+=7;
et.setText(str);
}
vi=v;
}
});
number[8].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=8;
et.setText(str);
flag=0;
}
else{
str+=8;
et.setText(str);
}
vi=v;
}
});
number[9].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(flag==1){
str="";
str+=9;
et.setText(str);
flag=0;
}
else{
str+=9;
et.setText(str);
}
vi=v;
}
});
//设定符号键
//加
fuhao[0].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(str!=""){
if(vi==fuhao[0]||vi==fuhao[1]||vi==fuhao[2]||vi==fuhao[3]){
c=1;
}
else{
g=Double.parseDouble(str);
calculater();
str=""+f;
et.setText(str);
c=1;
flag=1;
vi=v;
}}
}
});
//减
fuhao[1].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(str!=""){
if(vi==fuhao[0]||vi==fuhao[1]||vi==fuhao[2]||vi==fuhao[3]){
c=2;
}
else{
g=Double.parseDouble(str);
calculater();
str=""+f;
et.setText(str);
c=2;
flag=1;
vi=v;
}}
}
});
//乘
fuhao[2].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(str!=""){
if(vi==fuhao[0]||vi==fuhao[1]||vi==fuhao[2]||vi==fuhao[3]){
c=3;
}
else{
g=Double.parseDouble(str);
calculater();
str=""+f;
et.setText(str);
c=3;
flag=1;
vi=v;
}}
}
});
//除
fuhao[3].setOnClickListener(new View.OnClickListener() {
public void onCli
简易计算器.zip （44个子文件） 
yuanma demo03 
.classpath 280B .settings org.eclipse.jdt.core.prefs 208B assets src ymq demo03 demo03.java 9KB res drawable-mdpi 
icon.png 878B drawable-ldpi icon.png 671B values strings.xml 922B layout main.xml 8KB drawable-hdpi icon.png 1KB bin resources.ap_ 9KB demo03.apk 16KB classes.dex 14KB ymq demo03 demo03$14.class 1KB demo03$16.class 1KB demo03$10.class 1KB demo03$3.class 1KB demo03$18.class 1KB demo03$6.class 1KB demo03$8.class 1KB demo03$11.class 1KB demo03$20.class 1KB demo03$17.class 1KB demo03$9.class 1KB R$string.class 998B demo03$12.class 1KB R$layout.class 370B demo03$21.class 1KB R$id.class 1KB demo03$5.class 1KB demo03$15.class 1KB demo03$19.class 1KB demo03.class 4KB R$attr.class 316B demo03$13.class 1KB R$drawable.class 376B demo03$7.class 1KB demo03$4.class 1KB R.class 475B demo03$2.class 970B demo03$1.class 919B proguard.cfg 1KB default.properties 362B .project 842B AndroidManifest.xml 670B gen ymq demo03 R.java 3KB资源评论
