public class ThreadLocal<T>{
	public void set(T value){
		...
	}
	public T get(){
		...
	}
	protected T initialValue(){
		...
	}

}

private Map<Thread,Integer> threadData = new HashMap<Thread,Integer>();//内部维护一个装线程和数据的Map

threadData.put(Thread.currentThread(),data);//将线程及对应的数据装入

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME) 
public @interface ViewInject {  
  	int value() default 0 ;  
}

@ViewInject(R.id.tv_name)
private TextView myTextView;

public void parseAnnotation(Class<?>  clazz) {  	//传一个类进来
    	try {  
         Field[] fields = clazz.getDeclaredFields();	//获取该类的字段
         for (Field field : fields) {  					//遍历字段
           if (field.isAnnotationPresent(ViewInject.class)) {  	//字段被注解标注
                ViewInject inject = field.getAnnotation(ViewInject.class);  	//获取注解对象
                	int id = inject.value();  										//获取注解值
                 	 if (id > 0) {  											//值是正确的
                     field.setAccessible(true);  				//该值可达
                     field.set(this, this.findViewById(id));			//给字段设置值  
                 }  
             }  
         }  
     } catch (IllegalAccessException e) {  
         e.printStackTrace();  
    } catch (IllegalArgumentException e) {  
         e.printStackTrace();  
      }  
 }

@Override
   protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
       super.onMeasure(widthMeasureSpec, heightMeasureSpec);
       int viewWidth = circleRadius /*默认size*/+ this.getPaddingLeft() + this.getPaddingRight();
       int viewHeight = circleRadius + this.getPaddingTop() + this.getPaddingBottom();
       int widthMode = MeasureSpec.getMode(widthMeasureSpec);//获取宽度的模式
       int widthSize = MeasureSpec.getSize(widthMeasureSpec);//获取宽度的尺寸
       int heightMode = MeasureSpec.getMode(heightMeasureSpec);//高度的模式
       int heightSize = MeasureSpec.getSize(heightMeasureSpec);//高端的尺寸
       int width;
       int height;
       //Measure Width
       if (widthMode == MeasureSpec.EXACTLY) {//指定了确定的尺寸：100dp,match_parent
           //Must be this size
           width = widthSize;
       } else if (widthMode == MeasureSpec.AT_MOST) {//wrap_content类型
           //Can't be bigger than...
           width = Math.min(viewWidth, widthSize);
       } else {
           //Be whatever you want
           width = viewWidth;
       }
       //Measure Height
       if (heightMode == MeasureSpec.EXACTLY || widthMode == MeasureSpec.EXACTLY) {
           //Must be this size
           height = heightSize;
       } else if (heightMode == MeasureSpec.AT_MOST) {
           //Can't be bigger than...
           height = Math.min(viewHeight, heightSize);
       } else {
           //Be whatever you want
           height = viewHeight;
       }
       setMeasuredDimension(width, height);
   }