如何加载图像，并立即调整其大小以后使用 [英] How to load an image and resize it immediately to use later

问题描述

我的工作对图像处理的应用程序。
我用BitmapFactory.de codeStream加载一个图像，当我preSS的按钮将图像传递到的setPixel，它会导致OutOfMemoryError错误。
我试图更小的图像是好的。

I am working on an app for image processing. I use BitmapFactory.decodeStream to load an image, when I press the button to pass the image to setPixel, it leads to OutOfMemoryError. I tried smaller image is okay.

反正加载一个大图，并立即用较小的尺寸保存位图？

Anyway to load a big image and immediately save it in Bitmap with a smaller size?

推荐答案

使用 BitmapFactory.Options.inSampleSize 脱code较小的位图。

Use BitmapFactory.Options.inSampleSize to decode a smaller bitmap.

公众诠释inSampleSize

自：API等级1

如果设定值> 1，要求德codeR二次采样原
  图像，返回较小的图像以节省内存。样本量
  对应于一个单一的任一维的像素数
  像素在德codeD位图。例如， inSampleSize == 4 返回
  图像即1/4原稿的宽度/高度，和1/16的
  像素数。任何值＆LT; = 1是一样对待1.注意：
  德codeR会尽量满足这一要求，但由此产生的位图可
  有$ P $已要求pcisely什么不同的尺寸。
  此外，2的幂往往更快/为德codeR兑现容易。

If set to a value > 1, requests the decoder to subsample the original image, returning a smaller image to save memory. The sample size is the number of pixels in either dimension that correspond to a single pixel in the decoded bitmap. For example, inSampleSize == 4 returns an image that is 1/4 the width/height of the original, and 1/16 the number of pixels. Any value <= 1 is treated the same as 1. Note: the decoder will try to fulfill this request, but the resulting bitmap may have different dimensions that precisely what has been requested. Also, powers of 2 are often faster/easier for the decoder to honor.

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