<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
 android:src="@mipmap/ic_border_cupons_left"
 android:tileMode="repeat"
 >

</bitmap>

/**
  * 初始化鋸齒背景
  * @param holder
  */
 private void initViewBg(ViewHolder holder) {
  // 設置內容區(qū)域平鋪的小圓角背景
  Bitmap topBitmap = BitmapFactory.decodeResource(mContext.getResources(), R.mipmap.ic_border_cupons_left);
  BitmapDrawable leftDrawable = new BitmapDrawable(mContext.getResources(), topBitmap);
  leftDrawable.setTileModeY(Shader.TileMode.REPEAT);

  Bitmap bottomBitmap = BitmapFactory.decodeResource(mContext.getResources(), R.mipmap.ic_border_cupons);
  BitmapDrawable rightDrawable = new BitmapDrawable(mContext.getResources(), bottomBitmap);
  rightDrawable.setTileModeY(Shader.TileMode.REPEAT);

  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
   holder.favourItemBgLeft.setBackground(leftDrawable);
   holder.favourItemBgRight.setBackground(rightDrawable);
  } else {
   holder.favourItemBgLeft.setBackgroundDrawable(leftDrawable);
   holder.favourItemBgRight.setBackgroundDrawable(rightDrawable);
  }

 }