设置outWidth和outHeight而不是inSampleSize来解码bitmap有什么危害答案

【问题标题】：What are the dangers of setting outWidth and outHeight instead of inSampleSize for decoding bitmap设置outWidth和outHeight而不是inSampleSize来解码bitmap有什么危害
【发布时间】：2014-04-23 17:28:21
【问题描述】：

要在android中调整位图的大小，我正在考虑这样做

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1;
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filepath, options);
// options.inSampleSize = ImageResizer.calculateInSampleSize(options, x, y);
options.outWidth = x;
options.outHeight = y;
options.inJustDecodeBounds = false;
Bitmap bmp = BitmapFactory.decodeFile(filepath, options);

请注意注释掉了哪一行。我的方法与更常用的方法有何不同（比较和对比）

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1;
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filepath, options);
options.inSampleSize = ImageResizer.calculateInSampleSize(options, x, y);
// options.outWidth = x;
// options.outHeight = y;
options.inJustDecodeBounds = false;
Bitmap bmp = BitmapFactory.decodeFile(filepath, options);

如果我保留所有这些会怎样？如

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1;
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filepath, options);
options.inSampleSize = ImageResizer.calculateInSampleSize(options, x, y);
options.outWidth = x;
options.outHeight = y;
options.inJustDecodeBounds = false;
Bitmap bmp = BitmapFactory.decodeFile(filepath, options);

【问题讨论】：

标签： android android-layout bitmap bitmapfactory

【解决方案1】：

设置outWidth和outHeight而不是inSampleSize来解码bitmap有什么危害

outWidth 和 outHeight 是输出值。它们不是输入值。自己设置它们不会有任何用处。

【讨论】：