Android GridView仿微信朋友圈显示图片

<com.view.SquareLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:layout_width="wrap_content" 
 android:layout_height="wrap_content" 
 android:orientation="vertical" > 
 <ImageView 
  android:id="@+id/item_grida_image" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:scaleType="fitXY" 
  android:layout_margin="@dimen/tinyest_space"> 
 </ImageView> 
</com.view.SquareLayout> 

noScrollgridview = (GridView) findViewById(R.id.noScrollgridview); 
  noScrollgridview.setNumColumns(3); //默认设置在3列图片 
  //上传成功传值给adapter 
  picAdapter = new PictureAdapter(this, 1, appItem_file); 
  noScrollgridview.setAdapter(picAdapter); 



//根据图片数量设置图片的列 
  int size = appItemFile.getFiles().split(",").length; 
  if (size==1){ 
   noScrollgridview.setNumColumns(1); 
  } 
  else if (size==2){ 
   noScrollgridview.setNumColumns(2); 
  } 
  else if (size>2){ 
   noScrollgridview.setNumColumns(3); 
  } 
  picAdapter.notifyDataSetChanged(); 

/** 
 * 方形布局 
 */ 
public class SquareLayout extends RelativeLayout { 
 public SquareLayout(Context context, AttributeSet attrs, int defStyle) { 
  super(context, attrs, defStyle); 
 } 
 
 public SquareLayout(Context context, AttributeSet attrs) { 
  super(context, attrs); 
 } 
 
 public SquareLayout(Context context) { 
  super(context); 
 } 
 
 @SuppressWarnings("unused") 
 @Override 
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
  // For simple implementation, or internal size is always 0. 
  // We depend on the container to specify the layout size of 
  // our view. We can't really know what it is since we will be 
  // adding and removing different arbitrary views and do not 
  // want the layout to change as this happens. 
  setMeasuredDimension(getDefaultSize(0, widthMeasureSpec), 
    getDefaultSize(0, heightMeasureSpec)); 
 
  // Children are just made to fill our space. 
  int childWidthSize = getMeasuredWidth(); 
  int childHeightSize = getMeasuredHeight(); 
  // 高度和宽度一样 
  heightMeasureSpec = widthMeasureSpec = MeasureSpec.makeMeasureSpec( 
    childWidthSize, MeasureSpec.EXACTLY); 
  super.onMeasure(widthMeasureSpec, heightMeasureSpec); 
 } 
}