学步园

RadioButton,就是一个单选按钮,Radioroup包含一组RadioButton，供选择，这里只能单选，并且选中后再次点击不会取消选中。

常用属性：

android:checked="true"                                   设置 是否为选中状态  

android:text="@string/title1_button2"           设置单选的文字内容

android:layout_marginLeft="30dp"               控制两个单选按钮之间的距离

android:paddingLeft="20dp"                          控制单选按钮和文字之间的距离

android:button="@drawable/radio"              设置单选按钮的点击效果

布局文件如下：

   <RadioGroup 
			        android:id="@+id/title1_group" 
			        android:layout_width="wrap_content" 
			        android:layout_height="wrap_content" 
			        android:orientation="horizontal"
			        android:layout_marginLeft="10dp"> 
			         <RadioButton 
			             android:id="@+id/title1_button1" 
			             android:layout_width="wrap_content" 
			             android:layout_height="wrap_content" 
			             android:text="@string/title1_button1"  
			             android:textColor="@color/description_text_color"  
			             android:button="@drawable/radio"  
			             android:paddingLeft="20dp"   
			             android:textSize="@dimen/title_text_size"            
			         />  
			          <RadioButton 
			             android:id="@+id/title1_button2" 
			             android:layout_width="wrap_content" 
			             android:layout_height="wrap_content" 
			             android:text="@string/title1_button2"  
			             android:textColor="@color/description_text_color"  
			             android:textSize="@dimen/title_text_size"
			             android:button="@drawable/radio"   
			             android:paddingLeft="20dp"
			             android:layout_marginLeft="30dp" 设置和上一个单选按钮的左边距离30dp
			         />  
			        </RadioGroup>   

在代码中添加方式如下：

              
                  RadioButton radioBtn1, radioBtn2;
        
                  LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
				LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);

		params.gravity = Gravity.CENTER_VERTICAL;
		
                  RadioGroup radioGroup = new RadioGroup(this);
	         radioGroup.setLayoutParams(params);
		radioGroup.setOrientation(RadioGroup.HORIZONTAL);

		radioBtn1 = new RadioButton(this);
		// 界面布局宽度,高度
		LinearLayout.LayoutParams lp1 = new LinearLayout.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		radioBtn1.setLayoutParams(lp1);
		radioBtn1.setText("按钮1");
	         radioBtn1.setTextColor(Color.parseColor("#999d9c"));
		
		radioGroup.addView(radioBtn1);

		radioBtn2 = new RadioButton(this);
		LinearLayout.LayoutParams lp2= new LinearLayout.LayoutParams(			
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		radioBtn2.setLayoutParams(lp2);
                  radioBtn2.setTextColor(Color.parseColor("#999d9c"));		radioBtn2.setText("按钮2");					radioGroup.addView(radioBtn2);

设置RadioGroup的监听

                  title1_group = (RadioGroup) findViewById(R.id.title1_group);
		title1_group.setOnCheckedChangeListener(new OnCheckedChangeListener() {

			@Override
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				title1_group_isSelected = true;
				if (checkedId == R.id.title1_button1) {
					title1_group_selected = 0;

				} else if (checkedId == R.id.title1_button2) {
					title1_group_selected = 1;
				}
			}
		});