第四次作业

概述packagecom.example.jsj;importandroid.app.Activity;importandroid.os.Bundle;importandroid.view.Menu;importandroid.view.MenuItem;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;importandroid.widget.EditTex

package com.example.Jsj;import androID.app.Activity;import androID.os.Bundle;import androID.vIEw.Menu;import androID.vIEw.MenuItem;import androID.vIEw.VIEw;import androID.vIEw.VIEw.OnClickListener;import androID.Widget.button;import androID.Widget.EditText;import androID.Widget.RadioGroup;import androID.Widget.TextVIEw;public class MainActivity extends Activity {     EditText shuone;     EditText shutwe;     RadioGroup rag;     button but_five;     TextVIEw jg;      int Result=0;      int shuone1=0;      int shutwe1=0;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        shuone = (EditText) findVIEwByID(R.ID.one);        shutwe = (EditText) findVIEwByID(R.ID.twe);        rag = (RadioGroup) findVIEwByID(R.ID.rag);        jg = (TextVIEw) findVIEwByID(R.ID.text_one);        but_five = (button) findVIEwByID(R.ID.but_five);        rag.setonCheckedchangelistener(new RadioGroup.OnCheckedchangelistener() {            @OverrIDe            public voID onCheckedChanged(RadioGroup group, int checkedID) {                 shuone1= Integer.parseInt(shuone.getText().toString().trim());                 shutwe1= Integer.parseInt(shutwe.getText().toString().trim());                // Todo auto-generated method stub                 String a ="";                 switch (checkedID) {                case R.ID.but_one:                     a= shuone1+shutwe1+"";                    break;                case R.ID.but_twe:                          a = shuone1-shutwe1+"";                    break;                case R.ID.but_three:                          a= shuone1*shutwe1+"";                    break;                case R.ID.but_four:                         a= shuone1/shutwe1+"";                      break;                }                                jg.setText(a);                }        });        but_five.setonClickListener(new OnClickListener() {                        @OverrIDe            public voID onClick(VIEw vIEw) {                // Todo auto-generated method stub                jg.setText(null);                shuone.setText(null);                shutwe.setText(null);            }        });            }    @OverrIDe    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @OverrIDe    public boolean onoptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroIDManifest.xml.        int ID = item.getItemID();        if (ID == R.ID.action_settings) {            return true;        }        return super.onoptionsItemSelected(item);    }}

<linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    xmlns:tools="http://schemas.androID.com/tools"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:orIEntation="vertical"    androID:background="#e7e7e7"    androID:paddingBottom="@dimen/activity_vertical_margin"    androID:paddingleft="@dimen/activity_horizontal_margin"    androID:paddingRight="@dimen/activity_horizontal_margin"    androID:paddingtop="@dimen/activity_vertical_margin"    tools:context="com.example.Jsj.MainActivity" >    <linearLayout         androID:layout_wIDth="match_parent"        androID:layout_height="match_parent"        androID:layout_weight="1"        androID:orIEntation="vertical"        >        <linearLayout            androID:layout_wIDth="match_parent"            androID:layout_height="match_parent"            androID:layout_weight="1"            androID:orIEntation="horizontal">            <TextVIEw                androID:layout_wIDth="0dp"                androID:layout_height="30dp"                androID:layout_weight="1"                androID:text="输入第一个数"                androID:layout_margintop="20dp"/>            <EditText                androID:ID="@+ID/one"                androID:layout_wIDth="0dp"                androID:layout_height="30dp"                androID:background="#ffffff"                androID:layout_weight="2"                androID:layout_margintop="20dp">            </EditText>        </linearLayout>        <linearLayout         androID:layout_wIDth="match_parent"        androID:layout_height="match_parent"        androID:layout_weight="1"        androID:orIEntation="horizontal"        >            <TextVIEw                androID:layout_wIDth="0dp"                androID:layout_height="30dp"                androID:layout_weight="1"                androID:text="输入第二个数"                androID:layout_margintop="20dp"/>            <EditText                androID:ID="@+ID/twe"                androID:layout_wIDth="0dp"                androID:layout_height="30dp"                androID:background="#ffffff"                androID:layout_weight="2"                androID:layout_margintop="20dp">            </EditText>          </linearLayout>    </linearLayout>       <linearLayout         androID:layout_wIDth="match_parent"        androID:layout_height="match_parent"        androID:layout_weight="1"        androID:orIEntation="vertical"        >                <linearLayout                 androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:layout_weight="1"                androID:orIEntation="horizontal"                >             <RadioGroup                androID:ID="@+ID/rag"                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:orIEntation="horizontal"                >            <Radiobutton                 androID:ID="@+ID/but_one"                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:textSize="25dp"                androID:layout_weight="1"                androID:text="+"                />            <Radiobutton                 androID:ID="@+ID/but_twe"                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:textSize="25dp"                androID:layout_weight="1"                androID:text="—"                />             <Radiobutton                 androID:ID="@+ID/but_three"                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:textSize="25dp"                androID:layout_weight="1"                androID:text="*"                />             <Radiobutton                 androID:ID="@+ID/but_four"                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:textSize="25dp"                androID:layout_weight="1"                androID:text="/"                />              </RadioGroup>                </linearLayout>                <relativeLayout                 androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:layout_weight="1"                >               <TextVIEw                    androID:ID="@+ID/text_one"                   androID:layout_wIDth="wrap_content"                   androID:layout_height="wrap_content"                   androID:textSize="25dp"                   androID:text="计算机结果显示在这"                   androID:layout_centerInParent="true"                   />               </relativeLayout>               </linearLayout>               <relativeLayout                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:layout_weight="1"                   >                    <button                        androID:ID="@+ID/but_five"                       androID:layout_wIDth="wrap_content"                       androID:layout_height="wrap_content"                       androID:layout_centerInParent="true"                       androID:text="清空"/>                   </relativeLayout>               </linearLayout>

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