ANDROID_MARS学习笔记_S01原始版_005_RadioGroup\CheckBox\Toast

一、代码

1.xml
(1)radio.xml

 <?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"
     >
 <TextView
     android:id="@+id/textView1"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:text="@string/hello"
     />
 <RadioGroup
     android:id="@+id/genderGroup"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:orientation="vertical"
     >
     <RadioButton
         android:id="@+id/femaleButton"
          android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="@string/female"
           />
     <RadioButton
         android:id="@+id/maleButton"
          android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="@string/male"
           />
 </RadioGroup>
 <CheckBox
     android:id="@+id/swim"
      android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="@string/swim"
       />
 <CheckBox
     android:id="@+id/run"
      android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="@string/run"
       />
 <CheckBox
     android:id="@+id/read"
      android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="@string/read"
       />
 </LinearLayout>

2.java
(1)RadioTest.java

 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 RadioGroup genderGroup = null;
     private RadioButton femaleButton = null;
     private RadioButton maleButton = null;
     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
         genderGroup = (RadioGroup)findViewById(R.id.genderGroup);
         femaleButton = (RadioButton)findViewById(R.id.femaleButton);
         maleButton = (RadioButton)findViewById(R.id.maleButton);
         swimBox = (CheckBox)findViewById(R.id.swim);
         runBox = (CheckBox)findViewById(R.id.run);
         readBox = (CheckBox)findViewById(R.id.read);
         //为RadioGroup设置监听器，需要注意的是，这里的监听器和Button控件的监听器有所不同
         genderGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

             @Override
             public void onCheckedChanged(RadioGroup group, int checkedId) {
                 // TODO Auto-generated method stub
                 if(femaleButton.getId() == checkedId){
                     System.out.println("famale");
                     Toast.makeText(RadioTest.this, "famle", Toast.LENGTH_SHORT).show();
                 }
                 else if(maleButton.getId() == checkedId)
                 {
                     System.out.println("male");
                 }
             }
         });

         //为多选按钮添加监听器
         swimBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

             @Override
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                 // TODO Auto-generated method stub
                 if(isChecked)
                 {
                     System.out.println("swim is checked");
                 }
                 else
                 {
                     System.out.println("swim is unchecked");
                 }
             }
         });
         runBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

             @Override
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                 // TODO Auto-generated method stub
                 if(isChecked)
                 {
                     System.out.println("run is checked");
                 }
                 else
                 {
                     System.out.println("run is unchecked");
                 }
             }
         });
         readBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

             @Override
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                 // TODO Auto-generated method stub
                 if(isChecked)
                 {
                     System.out.println("read is checked");
                 }
                 else
                 {
                     System.out.println("read is unchecked");
                 }
             }
         });
     }

 }

官方文档设置监听都是在xml中设定android:onClick="onCheckboxClicked"/>，然后在java文件中编写onCheckboxClicked方法用switch判断选择状态

 <?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">
     <CheckBox android:id="@+id/checkbox_meat"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/meat"
         android:onClick="onCheckboxClicked"/>
     <CheckBox android:id="@+id/checkbox_cheese"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/cheese"
         android:onClick="onCheckboxClicked"/>
 </LinearLayout>

 public void onCheckboxClicked(View view) {
     // Is the view now checked?
     boolean checked = ((CheckBox) view).isChecked();

     // Check which checkbox was clicked
     switch(view.getId()) {
         case R.id.checkbox_meat:
             if (checked)
                 // Put some meat on the sandwich
             else
                 // Remove the meat
             break;
         case R.id.checkbox_cheese:
             if (checked)
                 // Cheese me
             else
                 // I'm lactose intolerant
             break;
         // TODO: Veggie sandwich
     }
 }