public void takeOrder(View v){
    CheckBox chk;
    String msg="";
    int[] id={R.id.chk1,R.id.chk2,R.id.chk3,R.id.chk4,R.id.chk5,R.id.chk6};
    for (int i:id) {
        chk = (CheckBox) findViewById(i);
        if (chk.isChecked()) msg += "\n" + chk.getText();
    }
        if (msg.length()>0)  msg="你点购的餐点是："+msg;
        else  msg="请点餐！";

        ( (TextView)findViewById(R.id.showOrder)).setText(msg);

}

  1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2     xmlns:tools="http://schemas.android.com/tools"
  3     android:layout_width="match_parent"
  4     android:layout_height="match_parent"
  5     android:paddingBottom="@dimen/activity_vertical_margin"
  6     android:paddingLeft="@dimen/activity_horizontal_margin"
  7     android:paddingRight="@dimen/activity_horizontal_margin"
  8     android:paddingTop="@dimen/activity_vertical_margin"
  9     tools:context="com.qh20161208.ch05_foodmenu.MainActivity"
 10     android:orientation="vertical">
 11 
 12 
 13 
 14     <LinearLayout
 15     android:layout_width="match_parent"
 16     android:layout_height="wrap_content"
 17     android:orientation="horizontal"
 18         android:layout_margin="5dp">
 19         <CheckBox
 20 
 21             android:layout_width="wrap_content"
 22             android:layout_height="wrap_content"
 23             android:text="汉堡"
 24             android:id="@+id/chk1"
 25             android:textSize="30sp" />
 26 
 27         <CheckBox
 28             android:layout_width="wrap_content"
 29             android:layout_height="wrap_content"
 30             android:text="薯条"
 31             android:id="@+id/chk2"
 32             android:textSize="30sp" />
 33 </LinearLayout>
 34 
 35     <LinearLayout
 36         android:layout_width="match_parent"
 37         android:layout_height="wrap_content"
 38         android:orientation="horizontal"
 39         android:layout_margin="5dp">
 40         <CheckBox
 41 
 42             android:layout_width="wrap_content"
 43             android:layout_height="wrap_content"
 44             android:text="可乐"
 45             android:id="@+id/chk3"
 46             android:textSize="30sp" />
 47 
 48         <CheckBox
 49             android:layout_width="wrap_content"
 50             android:layout_height="wrap_content"
 51             android:text="玉米浓汤"
 52             android:id="@+id/chk4"
 53             android:textSize="30sp" />
 54     </LinearLayout>
 55 
 56     <LinearLayout
 57         android:layout_width="match_parent"
 58         android:layout_height="wrap_content"
 59         android:orientation="horizontal"
 60         android:layout_margin="5dp">
 61         <CheckBox
 62 
 63             android:layout_width="wrap_content"
 64             android:layout_height="wrap_content"
 65             android:text="鸡块"
 66             android:id="@+id/chk5"
 67             android:textSize="30sp" />
 68 
 69         <CheckBox
 70             android:layout_width="wrap_content"
 71             android:layout_height="wrap_content"
 72             android:text="沙拉"
 73             android:id="@+id/chk6"
 74             android:textSize="30sp" />
 75     </LinearLayout>
 76 
 77     <LinearLayout
 78         android:orientation="horizontal"
 79         android:layout_width="match_parent"
 80         android:layout_height="70dp"
 81         android:layout_margin="5dp">
 82         <Button
 83             android:layout_width="match_parent"
 84             android:layout_height="wrap_content"
 85             android:text="订购"
 86             android:id="@+id/button"
 87             android:textSize="30sp"
 88             android:onClick="takeOrder"
 89             android:layout_gravity="center_horizontal" />
 90     </LinearLayout>
 91 
 92 
 93 
 94    
 95         <TextView
 96             android:id="@+id/showOrder"
 97             android:layout_width="match_parent"
 98             android:layout_height="wrap_content"
 99             android:text=""
100             android:textSize="30sp"/>
101 
102    
103 </LinearLayout>