Question

我正在使用Gallery-widget和许多位图。为了擦除位图，我使用Bitmap.recycle（）。结果我在logcat上看到了下一个消息：

08-18 17:49:26.020: INFO/dalvikvm-heap(13847): Grow heap (frag case) to 22.373MB for 2457616-byte allocation
08-18 17:49:26.060: DEBUG/dalvikvm(13847): GC_FOR_ALLOC freed 1K, 36% free 22835K/35143K, paused 27ms
08-18 17:49:26.230: DEBUG/dalvikvm(13847): GC_CONCURRENT freed <1K, 36% free 22835K/35143K, paused 2ms+3ms
08-18 17:49:28.070: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.080: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.110: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.120: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.140: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.160: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.180: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.190: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.210: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.230: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.240: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.260: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.280: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.290: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.310: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.330: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.350: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.360: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.380: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.400: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.410: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.430: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.450: ERROR/OpenGLRenderer(13847): Cannot generate texture from bitmap
08-18 17:49:28.500: INFO/System.out(13847): Image width: 144; height: 108
08-18 17:49:28.570: DEBUG/dalvikvm(13847): GC_FOR_ALLOC freed 4094K, 42% free 20449K/35143K, paused 27ms
08-18 17:49:28.620: INFO/dalvikvm-heap(13847): Grow heap (frag case) to 22.385MB for 2457616-byte allocation

Gallery-widget上的项目是黑色的。但应用程序有效。

你对这个问题有任何想法吗？

Answer 1

我遇到了同样的问题。问题在于，通过调用recycle（），您可以销毁引用图像像素数据的本机对象，并将对象本身（位图）标记为“死”。如果没有其他对象引用这些数据，它们将被GC释放。所以有两件事可能发生在你身上：

位图只是由GC收集，因此渲染器没有数据可供使用。
由于位图本身已标记为死，因此无法从/向其读取/写入像素

因此，如果您正在使用/引用此位图并进行回收，那么您只是拒绝为每个人访问它。至少我这样理解。仔细阅读：

http://developer.android.com/reference/android/graphics/Bitmap.html#recycle%28%29

因此，只有在确定没有人使用/引用位图对象时才应使用回收。我希望它有所帮助。

Answer 2

作为speedy said，您可能正在尝试访问已标记为垃圾收集的位图。

一个简单的解决方案是在返回位图之前进行isRecycled()检查：

// ...

/**
 *  Will return a usable Bitmap or null if the Bitmap was not found.
 */
public Bitmap getBitmapForGallery(int uniqueImageId)
{
    Bitmap bitmap;

    // The code to fetch bitmap from cache is here.
    // ...

    return bitmap.isRecycled() ? null : bitmap;
}

// ...

Answer 3

当我们重用位图

时也会发生这种情况

Eg.bitmap = getResizedBitmap（位图，500）; 在这里，我再次使用位图来调整大小，这导致了一个问题。

Android消息“无法从位图生成纹理”

3 个答案: