如何释放在Android的位图内存 [英] how to release bitmap memory in android

问题描述

在我们的程序を用大量的图片，我们unbindDrawables在eyery活动和片段如下

In our program wo use lots of images,we unbindDrawables in eyery Activity and Fragment as below

protected void unbindDrawables(View view) {
    if (view != null) {
        if (view.getBackground() != null) {
            view.getBackground().setCallback(null);
        }
        if (view instanceof ImageView) {
            ImageView imageView = (ImageView) view;
            imageView.setImageDrawable(null);
        }
        if (view instanceof ViewGroup && !(view instanceof AdapterView)) {
            for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
                unbindDrawables(((ViewGroup) view).getChildAt(i));
            }
            if (!(view instanceof AbsSpinner) && !(view instanceof AbsListView)) {
                ((ViewGroup) view).removeAllViews();
            }
        }
    }
}

这样的 http://stackoverflow.com/a/6779067 说，但我用的垫子发现，位图也使用大量内存和不释放。

like this http://stackoverflow.com/a/6779067 said,but I use the mat find that the bitmap also use a lots of memory and not release.

Class Name                               |   Objects | Shallow Heap | Retained Heap

 android.graphics.Bitmap                 |       490 |       23,520 | >= 36,267,912
 android.graphics.Bitmap$1               |         1 |            8 |          >= 8
 android.graphics.Bitmap$2               |         0 |            0 |         >= 80
 android.graphics.Bitmap$BitmapFinalizer |       490 |        7,840 |      >= 7,840
 android.graphics.Bitmap$CompressFormat  |         3 |           72 |        >= 232
 android.graphics.Bitmap$CompressFormat[]|         1 |           24 |         >= 24
 android.graphics.Bitmap$Config          |         4 |           96 |        >= 360
 android.graphics.Bitmap$Config[]        |         2 |           72 |         >= 72
 android.graphics.BitmapFactory          |         0 |            0 |         >= 80
 android.graphics.BitmapFactory$Options  |         0 |            0 |              
 android.graphics.BitmapRegionDecoder    |         0 |            0 |         >= 48
 android.graphics.BitmapShader           |         9 |          216 |     >= 15,736
 Total: 12 entries (4,509 filtered)      |     1,000 |       31,848 |              

我不知道为什么它没有被释放，如何释放它，任何机构可以帮助我，非常感谢！

I don't know why it not be released and how to release it,any body can help me,thanks a lot!

推荐答案

您必须调用bitmap.recycle（）来释放分配的本地内存，当你去codeD位图。

You must call bitmap.recycle() to release the native memory allocated when you decoded the bitmap.

当然，你必须把位图的生命周期的服务。要在适当的时间将其释放。更好的方法是使用一些图像加载器类来照顾它。请参见 https://github.com/nostra13/Android-Universal-Image-Loader

And of course you must have to take care of the life cycle of the bitmap. To release it at proper time. A better solution is to use some image loader class to take care of it. See https://github.com/nostra13/Android-Universal-Image-Loader

这篇关于如何释放在Android的位图内存的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！