Android-正方形的容器

package liu.myrecyleviewchoosephoto.view;


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

/**
 * 正方形的RelativeLayout
 * Created by 劉楠 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) {


        //設置自己測量結果
        setMeasuredDimension(getDefaultSize(0,widthMeasureSpec),getDefaultSize(0,heightMeasureSpec));


        /**
         * 測量子View的
         */
        int childWidthSize=getMeasuredWidth();
        //高度與寬度一樣
        widthMeasureSpec =MeasureSpec.makeMeasureSpec(childWidthSize,MeasureSpec.EXACTLY);
        heightMeasureSpec =widthMeasureSpec;

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}