Question

嗨：我必须对两个文件（左和右）进行图像处理我想要做的是在ImageSwitcher中并排显示它们。这是返回我想在imageswitcher中设置的Drawable的函数：

public Drawable getImage(String left, String right){
    System.err.println("Decoding both images");
    Bitmap Left = BitmapFactory.decodeFile(left);
    Bitmap Right = BitmapFactory.decodeFile(right);
    int height = Math.max(Left.getHeight(),Right.getHeight());
    int width = Left.getWidth() + Right.getWidth();
    Bitmap result = Bitmap.createBitmap(width,height,Config.RGB_565);       
    System.err.println("Creating the canvas");
    Canvas bothImages = new Canvas(result);
    System.err.println("Drawing both images beside each other");
    bothImages.drawBitmap(Left, 0f, 0f, null);
    bothImages.drawBitmap(Right, Left.getWidth(), 0f, null);
    System.err.println(Integer.toString(bothImages.getWidth()) + " x " + Integer.toString(bothImages.getHeight())); 
    bothImages.rotate(90f);
    System.err.println(Integer.toString(bothImages.getWidth()) + " x " + Integer.toString(bothImages.getHeight()));
    System.err.println("returning Drawable Left");
    return new BitmapDrawable(result);
}

我有两个问题。如果我使用Config.ARGB_8888，我会出现内存不足错误。所以我改为RGB_565。然而，这将降低图像的质量。反正有吗？

第二，即使我更改了配置设置，我收到以下控制台消息：

06-19 09:16:23.760: WARN/System.err(26218): Attempting to show /mnt/sdcard/Work/.temp/0000.jpg
06-19 09:16:23.760: WARN/System.err(26218): Decoding both images
06-19 09:16:24.510: WARN/System.err(26218): Creating the canvas
06-19 09:16:24.510: WARN/System.err(26218): Drawing both images beside each other
06-19 09:16:24.530: WARN/System.err(26218): 2560 x 1971
06-19 09:16:24.530: WARN/System.err(26218): 2560 x 1971
06-19 09:16:24.530: WARN/System.err(26218): returning Drawable Left
06-19 09:16:24.570: WARN/OpenGLRenderer(26218): Bitmap too large to be uploaded into a texture
06-19 09:16:24.850: WARN/OpenGLRenderer(26218): Bitmap too large to be uploaded into a texture
06-19 09:16:24.870: WARN/System.err(26218): Inside On resume
06-19 09:16:24.870: WARN/System.err(26218): About to set up animations
06-19 09:16:24.870: WARN/System.err(26218): On resume Done
06-19 09:16:24.870: WARN/System.err(26218): Attempting to show /mnt/sdcard/Work/.temp/0000.jpg
06-19 09:16:24.870: WARN/System.err(26218): Decoding both images
06-19 09:16:25.610: WARN/System.err(26218): Creating the canvas
06-19 09:16:25.610: WARN/System.err(26218): Drawing both images beside each other
06-19 09:16:25.640: WARN/System.err(26218): 2560 x 1971
06-19 09:16:25.640: WARN/System.err(26218): 2560 x 1971
06-19 09:16:25.640: WARN/System.err(26218): returning Drawable Left
06-19 09:16:25.660: WARN/OpenGLRenderer(26218): Bitmap too large to be uploaded into a texture
06-19 09:16:25.690: WARN/OpenGLRenderer(26218): Bitmap too large to be uploaded into a texture

我显然从未看到生成的图像。所以我想知道我做错了什么？

另一方面，当活动开始时，应显示前两个图像，以便在活动的OnResume方法上调用上面的代码。任何人都可以告诉我为什么这个方法被执行两次（打印输出很明显）？因为也许是我的内存错误与此有关...

感谢您提前提供任何帮助。

Answer 1

也许你对这里提到的硬件限制感到震惊

http://groups.google.com/group/android-developers/browse_thread/thread/2352c776651b6f99

Answer 2

这不完全是答案，但也许对某人有所帮助。我通过使用两个并排的图像视图来规避问题。如果您只想看图像（这是我的情况）那么为了让图像在边框中触摸我使用fitScaleType fitend为左边的图像和fitstart为右边的图像（横向模式是固定的我的情况）。

在android上操作两个图像时内存不足和OpenGL错误

2 个答案: