<?xml version="1.0" encoding="utf-8"?>
<liu.myrecyleviewchoosephoto.view.SquareRelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/rootView"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content">


 <RelativeLayout
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginLeft="7dp"
  android:layout_marginRight="7dp"
  android:layout_marginTop="14dp"
  android:background="@drawable/shape_white_bg_corner"
  >

  <ImageView
   android:id="@+id/ivDisPlayItemPhoto"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:contentDescription="@null"
   android:scaleType="centerCrop"
   android:layout_centerInParent="true"
   android:layout_marginRight="8dp"
   android:layout_marginLeft="8dp"
   android:layout_marginTop="5dp"
   android:layout_marginBottom="5dp"
   />

  <ImageView
   android:id="@+id/ivAddPhoto"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:layout_centerInParent="true"
   android:background="@color/white"
   android:scaleType="centerCrop"
   android:src="@mipmap/add_photo_refund"
   android:visibility="visible"/>

  <ImageView
   android:id="@+id/ivUploadingBg"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:src="@drawable/shape_grey_bg_corner"
   android:visibility="gone"/>

  <ImageView
   android:id="@+id/ivError"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_centerInParent="true"
   android:src="@mipmap/icon_prompt"
   android:visibility="gone"/>

  <TextView
   android:id="@+id/tvProgress"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_centerInParent="true"
   android:text="0%"
   android:textColor="@color/white"
   android:textSize="16sp"
   android:visibility="gone"/>

 </RelativeLayout>

 <ImageView
  android:id="@+id/ivDelete"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_alignParentRight="true"
  android:src="@mipmap/delete_photo"
  android:visibility="gone"/>


</liu.myrecyleviewchoosephoto.view.SquareRelativeLayout> 

 @Override
 public int getItemCount() {
  if (mDatas == null || mDatas.size() == 0) {
   return 1;
  } else if (mDatas.size() < mMaxNum) {
   return mDatas.size() + 1;
  } else {
   return mDatas.size();
  }
 }

package liu.myrecyleviewchoosephoto.view;


import android.content.Context;
import android.util.AttributeSet;
import android.widget.RelativeLayout;

/**
 * 正方形的RelativeLayout
 * Created by 刘楠 on 2016/8/13 0013.16:07
 */
public class SquareRelativeLayout extends RelativeLayout {
 public SquareRelativeLayout(Context context) {
  super(context);
 }

 public SquareRelativeLayout(Context context, AttributeSet attrs) {
  super(context, attrs);
 }

 public SquareRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
 }

 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {


  //设置自己测量结果
  setMeasuredDimension(getDefaultSize(0,widthMeasureSpec),getDefaultSize(0,heightMeasureSpec));


  /**
   * 测量子View的
   */
  int childWidthSize=getMeasuredWidth();
  //高度与宽度一样
  widthMeasureSpec =MeasureSpec.makeMeasureSpec(childWidthSize,MeasureSpec.EXACTLY);
  heightMeasureSpec =widthMeasureSpec;

  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 }
}