我正在使用Harism在https://github.com/harism/android_page_curl上创建的页面翻页动画。我将他的动画实现到我的Android电子书阅读器应用程序中,问题是当我快速翻页时,有时会出现奇怪的闪烁白光。然而,当我正常翻页时就没有这种情况了。我认为问题出在OpenGL方面。虽然我不熟悉这项技术,但在调试过程中我发现,在页面翻页完成后CurlRenderer类的onDrawFrame方法仍在进行一些绘图过程。
以下是日志记录:
@Override
public synchronized void onDrawFrame(final GL10 gl) {
mObserver.onDrawFrame();
gl.glClearColor(Color.red(mBackgroundColor) / 255f,
Color.green(mBackgroundColor) / 255f,
Color.blue(mBackgroundColor) / 255f,
Color.alpha(mBackgroundColor) / 255f);
gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
gl.glLoadIdentity();
if (USE_PERSPECTIVE_PROJECTION) {
gl.glTranslatef(0, 0, -6f);
}
for (int i = 0; i < mCurlMeshes.size(); ++i) {
mCurlMeshes.get(i).onDrawFrame(gl);
}
Calendar now = Calendar.getInstance();
int minute = now.get(Calendar.MINUTE);
int second = now.get(Calendar.SECOND);
int millis = now.get(Calendar.MILLISECOND);
Log.i("time curl renderer (onDrawFrame) : ", minute + ":" + second + "." + millis);
}
以下是日志记录:
02-20 07:27:37.320 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.326
02-20 07:27:37.328 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.336
02-20 07:27:37.335 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.344
02-20 07:27:37.343 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.354
02-20 07:27:37.359 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.367
02-20 07:27:37.367 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.377
02-20 07:27:37.375 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.387
02-20 07:27:37.390 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.399
02-20 07:27:37.398 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.410
02-20 07:27:37.414 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.422
02-20 07:27:37.421 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.432
02-20 07:27:37.437 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.444
02-20 07:27:37.445 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.455
02-20 07:27:37.453 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.465
02-20 07:27:37.468 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.477
02-20 07:27:37.476 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.487
02-20 07:27:37.492 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.501
02-20 07:27:37.500 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.509
02-20 07:27:37.515 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.520
02-20 07:27:37.523 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.532
02-20 07:27:37.531 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.542
02-20 07:27:37.546 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.555
02-20 07:27:37.554 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.565
02-20 07:27:37.570 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.576
02-20 07:27:37.578 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.588
02-20 07:27:37.585 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.598
02-20 07:27:37.601 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.610
02-20 07:27:37.609 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.619
02-20 07:27:37.617 30215-30407/org.com.ebook I/time curl renderer (onDrawFrame) :﹕ 27:37.629
当日志的第一行出现时,书页完成翻卷,假设时间是02-20 07:27:37.320。但在后面的行中,你可以看到onDrawFrame方法被连续调用。也许我在这个方法还没有完成工作时就翻卷了页面,导致闪光灯开关出现故障?有什么帮助吗?这里是视频链接,你可以在那里看到闪光灯有时会出现http://www.youtube.com/watch?v=HPJ2U18Caok&feature=youtu.be