RadioGroup and RadioButton CheckBox test

If we want to build a program about RadioGroup and RadioButton ,

we should do following works.

First,create MainActivity.java,activity_main.xml

then ,bind the MainActivity.java with activity_main.xml

next,add the next code at activity_main.xml

code:

 1 <RadioGroup
 2         android:id="@+id/rg1"
 3         android:layout_width="wrap_content"
 4         android:layout_height="wrap_content" >
 5     
 6 
 7     <RadioButton
 8         android:id="@+id/male"
 9         android:layout_width="wrap_content"
10         android:layout_height="wrap_content"
11         android:layout_alignLeft="@+id/rg1"
12         android:layout_below="@+id/rg1"
13         android:layout_marginTop="25dp" 
14         android:text="@string/male"/>
15 
16     <RadioButton
17         android:id="@+id/female"
18         android:layout_width="wrap_content"
19         android:layout_height="wrap_content"
20         android:layout_alignLeft="@+id/male"
21         android:layout_below="@+id/male" 
22         android:text="@string/female"/>
23     </RadioGroup>

View Code

in order to choose only one RadioButton we must put those RadioButton in the same group.

next,

in the MainActivity.java ,we should get the radiogroup by "radiogroup=(RadioGroup)findViewById(R.id.rg1);"

and get the RadioButtons by

female=(RadioButton)findViewById(R.id.female);
male=(RadioButton)findViewById(R.id.male );

next,

use the radiogroup to create the listener.radiogroup.setOnCheckdchangeListener(new RadioGroup.OnCheckedListener(){

@override

public void onCheckedChanged(RadioGroup group, int checkedId){

if (female.GetId()==checkedId)

{

//do your work

}

else

{

//do your work

}

);

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CheckBox的使用

checkbox 的使用和radiobutton的又不同。下面看怎么使用checkbutton。

1.获得checkbutton对象run=(CheckBox)findViewById(R.id.run);

 1     run.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
 2             
 3             @Override
 4             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
 5                 // TODO Auto-generated method stub
 6                 if (isChecked)
 7                 {
 8                     System.out.println("run is checked!");
 9                 }
10                 else 
11                 {
12                     System.out.println("run is not checked!");
13                 }
14             }
15         });

在这是checkbox对象的 setOnCheckedChangeListener（new CompoundButton.OnCheckedChangeListener())

在重写方法的时候是在传进来的参数变成了Compoundbutton 对象，和ischecked 布尔值

如果该checkbox对象被选中，那么ischecked为true 否则false

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