查看过大，呼吁getDrawingCache时融入绘画缓存（） [英] View too large to fit into drawing cache when calling getDrawingCache()

问题描述

我想取的的LinearLayout内容的截屏。该布局包含滚动视图，可以是可变高度/宽度。这code正常工作时的布局是不是太大（即你不需要滚动非常关闭屏幕上看到的一切）：

I'm trying to take a screenshot of the contents of a LinearLayout. The layout contains a scrollview that can be of variable height/width. This code works fine when the layout is not too big (i.e. you don't need to scroll very much off screen to see everything):

View v1 = (LinearLayout)theLayout;

v1.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);

但是，如果我试图捕捉的LinearLayout很大，那么对v1.getDrawingCache一个空指针的应用程序崩溃（）。

However, if the LinearLayout that I'm trying to capture is large, then the application crashes with a null pointer on v1.getDrawingCache().

有一个在logcat的一个错误：

There is an error in logcat:

05-11 13：16：20.999：W /浏览（17218）：查看过大，以适应绘图   高速缓存，需要4784400字节，只有3932160可用

05-11 13:16:20.999: W/View(17218): View too large to fit into drawing cache, needs 4784400 bytes, only 3932160 available

我怎样才能正确地采取这种布局的屏幕截图？有另一种方式去它不使用这么多的内存？

How can I properly take a screenshot of this layout? Is there another way to go about it that doesn't use so much memory?

推荐答案

下面就是结束了工作，我捕捉到一个大屏幕外的视图中的全部内容：

Here's what ended up working for me to capture a large off-screen view in it's entirety:

public static Bitmap loadBitmapFromView(View v) 
{
    Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.ARGB_8888);

    Canvas c = new Canvas(b);
    v.layout(0, 0, v.getLayoutParams().width, v.getLayoutParams().height);
    v.draw(c);
    return b;
}

它类似于这里答案，但我用视图的宽度/高度创建位图

It's similar to the answer here, except that I use the view's width/height to create the bitmap

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