<CheckBox

    android:id="@+id/beijing"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:text="北京" />

   //对控件对象进行声明

        CheckBox beijing=null; 

 beijing=(CheckBox)findViewById(R.id.beijing);

  beijing.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){

                @Override

                public void onCheckedChanged(CompoundButton buttonView,

                        boolean isChecked) {

                    // TODO Auto-generated method stub

                    if(isChecked){

                        editText1.setText(buttonView.getText()+"选中");

                    }else{

                        editText1.setText(buttonView.getText()+"取消选中");

                    }

                }

            });