2.常用控件:CheckBox

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常用控件:CheckBox

核心代码:

视图:

<CheckBoxandroid:id="@+id/swim" android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="@string/swim"  /><CheckBoxandroid:id="@+id/run" android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="@string/run"  /><CheckBoxandroid:id="@+id/read" android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="@string/read"  />

数据:

//对控件对象进行声明private CheckBox swimBox = null;private CheckBox runBox = null;private CheckBox readBox = null;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.radio);        //通过控件的ID来得到代表控件的对象        swimBox = (CheckBox)findViewById(R.id.swim);        runBox = (CheckBox)findViewById(R.id.run);        readBox = (CheckBox)findViewById(R.id.read);                //为多选按钮添加监听器        swimBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubif(isChecked){System.out.println("swim is checked");}else{System.out.println("swim is unchecked");}}});        runBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubif(isChecked){System.out.println("run is checked");}else{System.out.println("run is unchecked");}}});        readBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubif(isChecked){System.out.println("read is checked");}else{System.out.println("read is unchecked");}}});

控件图例:

具体应用:

XML文件:

<?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"    ><CheckBoxandroid:id="@+id/swim" android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="@string/swim"  /><CheckBoxandroid:id="@+id/run" android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="@string/run"  /><CheckBoxandroid:id="@+id/read" android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="@string/read"  /></LinearLayout>

Activity.java文件:

package mars.activity07;import android.app.Activity;import android.os.Bundle;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.Toast;public class RadioTest extends Activity {    /** Called when the activity is first created. *///对控件对象进行声明private CheckBox swimBox = null;private CheckBox runBox = null;private CheckBox readBox = null;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.radio);        //通过控件的ID来得到代表控件的对象        swimBox = (CheckBox)findViewById(R.id.swim);        runBox = (CheckBox)findViewById(R.id.run);        readBox = (CheckBox)findViewById(R.id.read);                        //为多选按钮添加监听器        swimBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubif(isChecked){System.out.println("swim is checked");}else{System.out.println("swim is unchecked");}}});        runBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubif(isChecked){System.out.println("run is checked");}else{System.out.println("run is unchecked");}}});        readBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubif(isChecked){System.out.println("read is checked");}else{System.out.println("read is unchecked");}}});    }    }

项目文件地址:

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