/**Bitmap放大的方法*/
private static Bitmap big(Bitmap bitmap) {
Matrix matrix = new Matrix();
matrix.postScale(1.5f,1.5f); //长和宽放大缩小的比例
Bitmap resizeBmp = Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix,true);
return resizeBmp;
}
/**Bitmap缩小的方法*/
private static Bitmap small(Bitmap bitmap) {
Matrix matrix = new Matrix();
matrix.postScale(0.8f,0.8f); //长和宽放大缩小的比例
Bitmap resizeBmp = Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix,true);
return resizeBmp;
}

// 绘制图片
            int saveCount = canvas.getSaveCount();
            canvas.save();
            canvas.translate(pLeft, pTop);   //画布画笔起点位置
            if (item.matrix != null) {
                canvas.concat(item.matrix);  //画布添加matrix矩阵
            }
            // 设置该图绘制的区域, 图片的绘制区域参数会跟随matrix参数的scale 同步放大缩小，比如如果绘制起点是100px处同时matrix.scale=0.5
//            则实际绘制中绘制起点在50px处
            canvas.clipRect(item.rect);
            // 绘制三张图片
            //  canvas.drawBitmap(）中绘制起点位置随matrix参数的scale 同步放大缩小,比如如果绘制起点是100px处同时matrix.scale=0.5
//            则实际绘制中绘制起点在50px处
            canvas.drawBitmap(item.bitmap,
                    item.rect.left, item.rect.top, mPaint);
            canvas.restoreToCount(saveCount);