android CheckBox控件的定义及事件监听

 android CheckBox控件的定义及事件监听，本例实现CheckBox控件的定义及点击事件的监听并显示结果，运行效果截图如下：

CheckBox控件的定义,main.xml内容如下：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    > 
<EditText 
    android:id="@+id/editText1"   
    android:layout_width="fill_parent"  
    android:layout_height="wrap_content"  
    android:text="请选择" 
    /> 
<CheckBox 
    android:id="@+id/beijing" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="北京" 
    /> 
<CheckBox 
    android:id="@+id/shanghai" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="上海" 
    /> 
<CheckBox 
    android:id="@+id/shenzhen" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="深圳" 
    /> 
</LinearLayout> 

activity CheckBoxTest.java内容如下：

package checkbox.pack; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.widget.CheckBox; 
import android.widget.CompoundButton; 
import android.widget.EditText; 
 
public class CheckBoxTest extends Activity { 
    /** Called when the activity is first created. */ 
    //对控件对象进行声明 
    CheckBox beijing=null; 
    CheckBox shanghai=null; 
    CheckBox shenzhen=null; 
    EditText editText1=null; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
        //通过控件的ID来得到代表控件的对象 
        beijing=(CheckBox)findViewById(R.id.beijing); 
        shanghai=(CheckBox)findViewById(R.id.shanghai); 
        shenzhen=(CheckBox)findViewById(R.id.shenzhen); 
        editText1=(EditText)findViewById(R.id.editText1); 
        //给CheckBox设置事件监听 
        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"); 
                } 
            } 
        }); 
        shanghai.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"); 
                } 
            } 
        }); 
        shenzhen.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"); 
                } 
            } 
        }); 
    } 
} 

注意CheckBoxTest.java 第26行CheckBox的事件实现通过CompoundButton.OnCheckedChangeListener  来实现。