从 MediaPlayer 退出后 OpenGL 上下文被破坏

发布于 2024-12-14 11:12:04 字数 857 浏览 2 评论 0原文

我们有一个增强现实应用程序，当指向特定标记时，它会显示视频或 3D 模型。这工作得很好，但是一旦我们通过后退按钮退出 MediaPlayer 活动，OpenGL 上下文似乎就会被破坏。然后应用程序将重新启动，并需要重新加载包括 3D 模型在内的所有资源，这会导致大约 10-15 秒的延迟，而我们希望避免这种情况。我已经读过一些关于 setPreserveEGLContextOnPause(true) 的内容，并将其放入我们的 GLSurfaceView 中（我们有一个 3.x 平板电脑），但它似乎没有做任何事情（我是否需要实现其他东西来让它工作吗？我几乎找不到有关它的可用文档）。

我不确定我们的应用程序中的问题可能出在哪里，我想我们的 GLSurface 的某个地方被破坏了，而我们没有注意到它。

我们从 MediaPlayer 退出的代码是这样的：

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_BACK)) {            
        this.finish();

        Intent intent = new Intent(MediaPlayerActivity.this, OpenGLActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        this.startActivity(intent);
    }
    return super.onKeyDown(keyCode, event);
}

有什么提示我们可以保留 OpenGL 上下文，或者退出 MediaPlayer 而不破坏我们的主要活动吗？

原文

We have an Augmented Reality app that displays either a video or a 3D model when pointing on a specific marker. This works fine, but as soon as we quit the MediaPlayer activity via the Back-Button, the OpenGL Context seems to get destroyed. The app then just restarts and needs to reload all assets including the 3D model which causes a delay of about 10-15 seconds which we want to prevent.
I read already something about setPreserveEGLContextOnPause(true) and put it in our GLSurfaceView (we have a 3.x tablet), but it doesn't seem to do anything (do I need to implement something else to make it work? I barely found usable documentation about it).

I'm not sure where in our app the problem could be, I suppose that somewhere our GLSurface gets destroyed and we dont notice it.

Our code from exiting from the MediaPlayer is this:

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_BACK)) {            
        this.finish();

        Intent intent = new Intent(MediaPlayerActivity.this, OpenGLActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        this.startActivity(intent);
    }
    return super.onKeyDown(keyCode, event);
}

Any hints how we can preserve the OpenGL context, or quit the MediaPlayer without trashing our main activity?

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