android计算器代码示例分享

<?xml version="1.0" encoding="utf-8"?>
<edittext
    android:id="@+id/edittext1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10" >

    <requestfocus />
</edittext>

<button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="1" />

<button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="2" />

<button
    android:id="@+id/button3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="+" />

<button
    android:id="@+id/button4"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="=" />

package com.action;

import android.r.integer;
import android.app.activity;
import android.os.bundle;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;
import android.widget.edittext;

public class jspactivity extends activity{
private button bt1;
private button bt2;
private button btadd;
private button bteql;

private edittext et;

private int a;
private int b;

private string stra="";
private string fh;
protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.jsp);
    bt1=(button) findviewbyid(r.id.button1);
    bt2=(button) findviewbyid(r.id.button2);
    btadd=(button) findviewbyid(r.id.button3);
    bteql=(button) findviewbyid(r.id.button4);

    et=(edittext) findviewbyid(r.id.edittext1);
    bt1.setonclicklistener(new sum());
    bt2.setonclicklistener(new sum());
    btadd.setonclicklistener(new onclicklistener() {

        @override
        public void onclick(view v) {
            // todo auto-generated method stub
            a=integer.parseint(et.gettext().tostring()) ;
            et.settext("");
            stra="";
            fh=btadd.gettext().tostring();
        }
    });
    bteql.setonclicklistener(new onclicklistener() {

        @override
        public void onclick(view v) {
            // todo auto-generated method stub
            b=integer.parseint(et.gettext().tostring()) ;
            et.settext("");
            stra="";
            if(fh.equals("+"))
            {
                int c=a+b;
                et.settext(""+c);
            }
        }
    });
}
public class sum implements onclicklistener{

    @override
    public void onclick(view v) {
        // todo auto-generated method stub
        switch (v.getid()) {
        case r.id.button1:
            stra+=bt1.gettext();
            et.settext(stra);
            break;
        case r.id.button2:
            stra+=bt2.gettext();
            et.settext(stra);
            break;

        default:
            break;
        }
    }
}
}