本文深入探讨了GLES20DisplayList在内存管理方面的关键机制，包括如何确保绘制帧间的Bitmap和DisplayList保持存活状态，以及它们在绘制调用期间的填充与清除过程。
Here is comment from GLES20DisplayList: /* These lists ensure that any Bitmaps and DisplayLists recorded by a DisplayList are kept alive as long as the DisplayList is alive. The Bitmap and DisplayList lists are populated by the GLES20RecordingCanvas during appropriate drawing calls and are cleared at the start of a new drawing frame or when the view is detached from the window. */
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