ANDROID_MARS学习笔记_S01原始版_005_RadioGroupCheckBoxToast

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
    }
}