与大位图处理（平铺一个小位图创建壁纸） [英] Dealing with Large Bitmaps (tiling a small bitmap to create wallpaper)

问题描述

我有记忆问题，并认为这可能都与创建大位图。

I'm having memory problems and think it might have to do with creating large bitmaps.

眼下的任务是让一个相当小的平铺图像，并创建一个更大的平铺图像并将其设置为手机壁纸。我这样做的方法是：

The task at hand is to get a fairly small tile image and create a larger tiled image and set this as the phone wallpaper. The way I'm doing this is:

1）创建一个视图是2 *屏幕宽度，1 *屏幕高度

1) Create a view that is 2 * screen width, 1 * screen height

2）设置视图背景到BitmapDrawable与平铺模式设置为重复

2) Set the view background to a BitmapDrawable with the tile mode set to repeat

3）其观点尺寸创建位图

3) Create a bitmap with the views dimensions

4）绘制以位图方式：view.draw（新的Canvas（位图））

4) draw the view to the bitmap by: view.draw(new Canvas(bitmap))

5）设置wallpper：getApplicationContext（）setWallpaper（位图）

5) set wallpper: getApplicationContext().setWallpaper(bitmap)

这工作正常我的手机（宏达魔术）和我已经尝试过其他手机。但我得到有关这个问题的错误报告。我试图通过加倍需要的尺寸来重现问题，问题似乎是发生在第4步时，认为被绘制到位图：

This works fine on my phone (HTC Magic) and other phones that I have tried. But I am getting bug reports relating to this issue. I tried to recreate the problem by doubling the required dimensions and the problem seems to be happening in the 4th step when the view is being drawn to the bitmap:

ERROR / dalvikvm堆（124）：堆按摩需要（7372800字节的外部分配过大）

ERROR/dalvikvm-heap(124): Heap Massage needed (7372800-byte external allocation too big)

我不知道如何去解决这一点。请帮忙！ 谢谢

I'm not sure how to go about solving this. Please help! Thanks

推荐答案

不完全相信，如果这是你的解决方案，但你看？ <一href="http://developer.android.com/reference/android/graphics/BitmapFactory.Options.html#inTempStorage"相对=nofollow> BitmapFactory.Options.inTempStorage

Not exactly sure if this is your solution, but have you looked at ? BitmapFactory.Options.inTempStorage

您使用它的方式是：

BitmapFactory.Options options = new BitmapFactory.Options();
options.inTempStorage = new byte[16*1024];
Bitmap bitmap_origin = BitmapFactory.decodeFile(path, options);

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