锁屏后摄像头preVIEW冻结 [英] Camera preview freezes after screen lock

问题描述

自定义相机应用程序，我已经写了停止后的屏幕锁定（通过推动锁比唐或等待一两分钟）给予preVIEW。我没有得到一个例外，这使得它很难找到问题。

The custom camera app I've written stops giving the preview after the screen locks (by pushing lock butten or waiting for a couple of minutes). I don't get an exception, which makes it quite difficult to find the problem.

难道Android的屏幕锁定（如果这是正确的说法）暂停/暂停/ ......我的应用程序（活动）？

Does the android screen lock (if that's the correct term) pauses/halts/... my App (activity)?

如果是这样的话，可能的原因是我的onPause / onResume方法呢？抑或是其他原因铁道部可能？

If this were the case, could the cause be my onPause/onResume methods? Or is another cause mor likely?

在此先感谢

推荐答案

我面临同样的问题，并修复它使用以下步骤：

I faced same problem and fixed it using following steps:

1. 我创造了我的相机，preVIEW并把它添加到容器的FrameLayout父活动的onResume（）。是这样的：

1. I created my camera preview and added it to the container FrameLayout in onResume() of the parent activity. Something like:

public void onResume{
    super.onResume();
    mCamera = Camera.open();
    if(null != mCamera){
        mCamera.setDisplayOrientation(90);
        mPreview = new CameraOverlay(getActivity(), mCamera);
        frLyParent.addView(mPreview);
    }
}

我删除在的onPause视图（）。这修复了冻结。

I removed the view in onPause(). This fixes the freeze.

public void onPause(){
    super.onPause();
    if(null != mCamera){
        mCamera.release();
        mCamera = null;
    }
    frLyParent.removeView(mPreview);
    mPreview = null;
}

其中CameraOverlay（）是其延伸SurfaceView并实现SurfaceHolder.Callback类。请让我知道如果你需要的实现。

where CameraOverlay() is the class which extends SurfaceView and implements SurfaceHolder.Callback. Do let me know if you need that implementation.

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