MyViewGroup.java

package com.BeeFramework.view;

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;

public class MyViewGroup extends ViewGroup {
       private final static String TAG = "MyViewGroup";
       
       private final static int VIEW_MARGIN=2;
   
       public MyViewGroup(Context context, AttributeSet attrs){
           super(context, attrs);
       }
       
       public MyViewGroup(Context context) {
           super(context);
       }
       @Override
       protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
           Log.d(TAG, "widthMeasureSpec = "+widthMeasureSpec+" heightMeasureSpec"+heightMeasureSpec);
           
           for (int index = 0; index < getChildCount(); index++) {
               final View child = getChildAt(index);
               // measure
               child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
           }
   
           super.onMeasure(widthMeasureSpec, heightMeasureSpec);
       }
   
       @Override
       protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4) {
           Log.d(TAG, "changed = "+arg0+" a2_menu = "+arg1+" top = "+arg2+" right = "+arg3+" botom = "+arg4);
           final int count = getChildCount();
           int row=0;// which row lay you view relative to parent
           int lengthX=arg1;    // right position of child relative to parent
           int lengthY=arg2;    // bottom position of child relative to parent
           for(int i=0;i<count;i++){
               
               final View child = this.getChildAt(i);
               int width = child.getMeasuredWidth();
               int height = child.getMeasuredHeight();
               lengthX+=width+VIEW_MARGIN;
               lengthY=row*(height+VIEW_MARGIN)+VIEW_MARGIN+height+arg2;
               //if it can't drawing on a same line , skip to next line
               if(lengthX>arg3){
                   lengthX=width+VIEW_MARGIN+arg1;
                   row++;
                   lengthY=row*(height+VIEW_MARGIN)+VIEW_MARGIN+height+arg2;
                   
               }
               
               child.layout(lengthX-width, lengthY-height, lengthX, lengthY);
           }
   
       }
   
   }