Andrews learning

 

1. Radio

 

. RadioGroup can be their different RadioButton, set up a limit with a Radio button group , with a RadioGroup Group button can only make a single choice ( multiple choice ).

 

  

 <RadioGroup  android:id="@+id/group" 
                    android:orientation="horizontal"> 
                    <RadioButton android:layout_width="wrap_content" 
                        android:layout_height="wrap_content" 
                        android:text="没过5年" 
                        android:checked="true" 
                        android:id="@+id/rdyear5" 
                        /> 
                    <RadioButton android:layout_width="wrap_content" 
                        android:layout_height="wrap_content" 
                        android:text="过5年" 
                        android:id="@+id/rdyearno5" 
                        /> 
                </RadioGroup> 

 

 

. java

 

  

private RadioGroup group;          
	private RadioButton rb1 ;   
	private RadioButton rb2 ; 
private boolean blflag; 
 
group=(RadioGroup) this.findViewById(R.id.group); 
		rb1=(RadioButton) this.findViewById(R.id.rdyear5); 
		rb2=(RadioButton) this.findViewById(R.id.rdyearno5); 
		group.setOnCheckedChangeListener(new checkedlistener()); 
 
public class checkedlistener implements RadioGroup.OnCheckedChangeListener{ 
 
		@Override 
		public void onCheckedChanged(RadioGroup group, int checkedId) { 
			if(checkedId==R.id.rdyear5){ 
				blflag=true; 
			}else if(checkedId==R.id.rdyearno5){ 
				blflag=false; 
			} 
		} 
	 
	} 

 

 

 

button Button is a variety of UI controls in one of the most commonly used , it is also the most popular Android development one of the controls , the user can touch it to trigger a series of events , you know a no click event of the Button is no sense , because the user's fixed point of thinking is to go see it !

 

android: id = "@ + id / btncal"
android: layout_width = "wrap_content"
android: layout_height = "wrap_content"
android: text = " computing " />

 

 

. java

 

  

Button btncal=(Button) this.findViewById(R.id.btncal);  //获取该按钮控件  
btncal.setOnClickListener(new listener());  //事件 
 
private class listener implements View.OnClickListener{ 
 
@Override 
public void onClick(View v) { 
 
} 
 
}