public void init() {
   mPaint.setColor(0x88000000);
   mPaint.setAntiAlias(true);
   mPaint.setDither(true);
   mPaint.setStyle(Paint.Style.STROKE);

   mWhitePiece = BitmapFactory.decodeResource(getResources(), R.drawable.stone_w2);

   mBlackPiece = BitmapFactory.decodeResource(getResources(), R.drawable.stone_b1);
}


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

   int widthSize = MeasureSpec.getSize(widthMeasureSpec);
   int widthMode = MeasureSpec.getMode(widthMeasureSpec);


   int heightSize = MeasureSpec.getSize(heightMeasureSpec);
   int heightMode = MeasureSpec.getMode(heightMeasureSpec);

   int width = Math.min(widthSize, heightSize);

   if (widthMode == MeasureSpec.UNSPECIFIED) {
       width = heightSize;
   } else if (heightMode == MeasureSpec.UNSPECIFIED) {
       width = widthSize;
   }
   setMeasuredDimension(width, width);


}

一看就没有认真听课