Android CheckBox 的使用案例分析

public class mainactivity extends activity {
 textview tv;
 checkbox cb1;
 checkbox cb2;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);

  cb1 = (checkbox) findviewbyid(r.id.checkbox1);
  cb2 = (checkbox) findviewbyid(r.id.checkbox2);
  tv = (textview) findviewbyid(r.id.textview1);

  cb1.setoncheckedchangelistener(cb);
  cb2.setoncheckedchangelistener(cb);
 }

 private checkbox.oncheckedchangelistener cb = new checkbox.oncheckedchangelistener() {
  @override
  public void oncheckedchanged(compoundbutton buttonview, boolean ischecked) {
   string stv = getstring(r.string.hoby);
   string scb1 = getstring(r.string.basketball);
   string scb2 = getstring(r.string.football);
   if (cb1.ischecked() && cb2.ischecked()) {
    tv.settext(stv + ":" + scb1 + "&&" + scb2);
   } else if (cb1.ischecked() && !cb2.ischecked()) {
    tv.settext(stv + ":" + scb1);
   } else if (!cb1.ischecked() && cb2.ischecked()) {
    tv.settext(stv + ":" + scb2);
   } else {
    tv.settext(stv);
   }
  }
 };

如下是布局文件:

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <textview

        android:id="@+id/textview1"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/hoby" />

    <checkbox

        android:id="@+id/checkbox1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/basketball" />

    <checkbox

        android:id="@+id/checkbox2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/football" />

</linearlayout>