Android相机按钮一半pressed监听器 [英] Android Camera Button Half Way Pressed Listener

问题描述

我试图寻找这个答案，但无法找到一个。

I have tried looking for an answer for this but was unable to find one.

我建立一个自定义的相机应用，并已掌握了一些基本的工作。我也能够从初始化真正的相机应用挡住相机按钮。我想这样做的唯一的事情就是建立在自动对焦时，相机按钮一半pressed。

I am building a custom camera app and have got the basics to work. I have also been able to block the camera button from initializing the real camera app. The only thing that I would like to do is build in autofocus when the camera button is half pressed.

我很舒服使用camera.autofocus，但无法找到一个方法来侦听摄像头按钮半途而废pressed（如默认的相机应用也）启动自动对焦电话。

I am comfortable using camera.autofocus, but cannot find a way to listen for the camera button to be halfway pressed (like the default camera app does) to start the autofocus call.

所以，如果有人能告诉我，如果有一个关键的code或另一种方式来听pssed它的拍照键感德$ P $的中途点，这将有助于我很多东西。

感谢

推荐答案

我有一个小的创意，只是在Android的烤任意键按下事件。我最终找出了关键code相机的重点是80这样。这也与Android文档相匹配，一旦我知道我一直在寻找。

I got a little creative and just toasted any key down event in android. I ended up finding out that the key code for camera focus is 80 this way. This also matches up with the android documentation once I knew what I was looking for.

http://developer.android.com/reference/android/view/ KeyEvent.html

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {


    if(event.getAction()==KeyEvent.ACTION_DOWN){

        Toast.makeText(this, new Integer(keyCode).toString(), Toast.LENGTH_LONG).show();
        return true;
    }

    return false;
}

希望这会帮助别人。

Hope this helps others.

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