Android的摄像机2 API - 检测时，我们有重点

问题描述

所以，我设法创造我想用老相机，我想它的方式的功能。

So, I managed to create the functionality i wanted with the old camera the way I wanted it.

使用mCamera.autoFocus（autoFocusCallback）;我发现，当我有重点和运行所需的code，而在preVIEW模式。

With mCamera.autoFocus(autoFocusCallback); i detect when I have focus and run the required code while in preview-mode.

现在我有一个很难把握如何做同样的摄像机2 API。
我的第一个想法是，我会使用

Now I have a hard time grasping how to do the same in camera2 API.My first idea was that i'd use

        private void process(CaptureResult result) {
        switch (mState) {
            case STATE_PREVIEW: {
                // We have nothing to do when the camera preview is working normally.
                int afState = result.get(CaptureResult.CONTROL_AF_STATE);
                //if (CaptureResult.CONTROL_AF_STATE == afState) {
                    Log.d("SOME KIND OF FOCUS", "WE HAVE");
                //}

                break;
            }
}

但我无法找到某种状态，告诉我，我们已经得到了关注的焦点。是否有人有任何想法如何这可以用摄像机2 API做什么？

but I fail to find some kind of state that tells me we have gotten focus. Does someone have any idea how this can be done with Camera2 API?

推荐答案

您已经基本上得到了它。状态列表您可以检查和过渡，可以发现这里。

You've basically got it. The list of states you can check for and their transitions can be found here.

这要看是什么 CONTROL_AF_MODE 你使用，但一般你检查 FOCUSED_LOCKED 或者 PASSIVE_FOCUSED ，虽然你可能想为 NOT_FOCUSED_LOCKED 和的情况下， PASSIVE_UNFOCUSED 案例相机的只是不能的重点放在现场。

It depends on what CONTROL_AF_MODE you are using, but generally you check for FOCUSED_LOCKED or perhaps PASSIVE_FOCUSED, though you may want to have cases for NOT_FOCUSED_LOCKED and PASSIVE_UNFOCUSED in case the camera just cannot focus on the scene.

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