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：
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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
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android:orientation="vertical"
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android:layout_width="fill_parent"
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android:layout_height="fill_parent"
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>
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<EditText
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android:id="@+id/editText1"
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android:layout_width="fill_parent"
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android:layout_height="wrap_content"
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android:text="请选择"
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/>
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<CheckBox
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android:id="@+id/beijing"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="北京"
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/>
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<CheckBox
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android:id="@+id/shanghai"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="上海"
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/>
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<CheckBox
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android:id="@+id/shenzhen"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="深圳"
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/>
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</LinearLayout>
activity CheckBoxTest.java内容如下：
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package checkbox.pack;
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import android.app.Activity;
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import android.os.Bundle;
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import android.widget.CheckBox;
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import android.widget.CompoundButton;
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import android.widget.EditText;
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public class CheckBoxTest extends Activity {
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/** Called when the activity is first created. */
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//对控件对象进行声明
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CheckBox beijing=null;
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CheckBox shanghai=null;
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CheckBox shenzhen=null;
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EditText editText1=null;
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.main);
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//通过控件的ID来得到代表控件的对象
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beijing=(CheckBox)findViewById(R.id.beijing);
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shanghai=(CheckBox)findViewById(R.id.shanghai);
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shenzhen=(CheckBox)findViewById(R.id.shenzhen);
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editText1=(EditText)findViewById(R.id.editText1);
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//给CheckBox设置事件监听
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beijing.setOnCheckedChangeListener(newCompoundButton.OnCheckedChangeListener(){
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@Override
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public void onCheckedChanged(CompoundButton buttonView,
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boolean isChecked) {
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// TODO Auto-generated method stub
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if(isChecked){
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editText1.setText(buttonView.getText()+"选中");
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}else{
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editText1.setText(buttonView.getText()+"取消选中");
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}
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}
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});
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shanghai.setOnCheckedChangeListener(newCompoundButton.OnCheckedChangeListener(){
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@Override
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public void onCheckedChanged(CompoundButton buttonView,
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boolean isChecked) {
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// TODO Auto-generated method stub
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if(isChecked){
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editText1.setText(buttonView.getText()+"选中");
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}else{
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editText1.setText(buttonView.getText()+"取消选中");
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}
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}
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});
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shenzhen.setOnCheckedChangeListener(newCompoundButton.OnCheckedChangeListener(){
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@Override
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public void onCheckedChanged(CompoundButton buttonView,
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boolean isChecked) {
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// TODO Auto-generated method stub
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if(isChecked){
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editText1.setText(buttonView.getText()+"选中");
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}else{
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editText1.setText(buttonView.getText()+"取消选中");
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}
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}
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});
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}
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}
注意CheckBoxTest.java 第26行CheckBox的事件实现通过CompoundButton.OnCheckedChangeListener来实现。
