ImageView的RAM的Andr​​oid [英] ImageView Android RAM

问题描述

这是我原来的问题一个后续。

A followup from my original question.

有没有使用Android应用ImageViews不使用大量的RAM的方式？

Is there a way to use ImageViews in android apps without using a lot of RAM?

在原来的问题我发现我的应用程序使用了大量的内存，并且发现这是我用的ImageViews太了所有的RAM。

In the original question I found that my app used a lot of RAM, and found that it was the ImageViews which I used that too up all the RAM.

要得到我使用图像

public void addPictureOnClick(View view){
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"),1);
    } 

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (requestCode == 1) {
            // currImageURI is the global variable I'm using to hold the content:// URI of the image
            Uri currImageURI = data.getData();                
            image.setImageURI(currImageURI);
        }

我想知道是否有另一种方式来显示图片，而不是URI？

I would like to know if there is another way to show pictures rather than the URI?

推荐答案

您可以扩展您的图片：

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
imageViewFIeld.setImageBitmap(BitmapFactory.decodeByteArray(image, 0, image.length, options));

缩放过程可能会更长，如果你有大的图像，但是内存的负荷也会展出更低。

The scaling process could be longer if you have big images, but the memory load will be lower on display.

编辑：更多您增加inSampleSize价值，更多的时候，它需要，使用更少的内存，您将有

More you increase the inSampleSize value, more times it take, less memory usage you will have.

inSampleSize文档：如果设置
  一个值> 1，要求德codeR
  二次采样原始图像，
  返回一个较小的图像保存
  记忆。样本大小是多少
  在任一维的像素的那
  对应于单个像素
  德codeD位图。例如，
  inSampleSize == 4返回图像
  即1/4的宽度/高度
  原，和1/16的数量
  像素。任何值＆LT; = 1的处理
  同1。注意：去codeR会尝试
  实现这个要求，但
  所得的位图可以具有不同的
  维度pcisely有什么$ P $
  被请求。此外，2权力
  往往更快/更容易去codeR到
  荣誉。

inSampleSize documentation : 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.

<一个href=\"http://developer.android.com/reference/android/graphics/BitmapFactory.Options.html#inSampleSize\" rel=\"nofollow\">http://developer.android.com/reference/android/graphics/BitmapFactory.Options.html#inSampleSize

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