如何打开＆QUOT;前置摄像头＆QUOT; Android平台？ [英] How to open "front camera" on android platform?

问题描述

更一般地，如果设备具有多个摄像机， 有没有什么办法来初始化它？

我没有发现它在Android的参考文档。

三星SHW-M100S有2个摄像头。 如果没有参考使用2个摄像头，任何想法三星是如何做..？

解决方案

 专用摄像头openFrontFacingCameraGingerbread（）{
    INT cameraCount = 0;
    相机凸轮=无效;
    Camera.CameraInfo cameraInfo =新Camera.CameraInfo（）;
    cameraCount = Camera.getNumberOfCameras（）;
    对于（INT camIdx = 0; camIdx＆LT; cameraCount; camIdx ++）{
        Camera.getCameraInfo（camIdx，cameraInfo）;
        如果（cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT）{
            尝试 {
                凸轮= Camera.open（camIdx）;
            }赶上（RuntimeException的E）{
                Log.e（TAG，摄像机未能打开：+ e.getLocalizedMessage（））;
            }
        }
    }

    返回凸轮;
}
 

添加以下权限在的Andr​​oidManifest.xml 文件：

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.CAMERA/＆GT;
＆LT;使用特征的android：NAME =android.hardware.camera机器人：要求=FALSE/＆GT;
＆LT;使用特征的android：NAME =android.hardware.camera.front机器人：要求=FALSE/＆GT;
 

注意：：该功能在姜饼（2.3）和向上的Andr​​oid版本可用

More generally, If a device has more than one camera, is there any way to initializing it?

I didn't find it in android reference doc.

Samsung SHW-M100S have 2 cameras. If there is no reference to use 2 cams, Any idea how samsung did..?

解决方案

private Camera openFrontFacingCameraGingerbread() {
    int cameraCount = 0;
    Camera cam = null;
    Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
    cameraCount = Camera.getNumberOfCameras();
    for (int camIdx = 0; camIdx < cameraCount; camIdx++) {
        Camera.getCameraInfo(camIdx, cameraInfo);
        if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
            try {
                cam = Camera.open(camIdx);
            } catch (RuntimeException e) {
                Log.e(TAG, "Camera failed to open: " + e.getLocalizedMessage());
            }
        }
    }

    return cam;
}

Add the following permissions in the AndroidManifest.xml file:

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-feature android:name="android.hardware.camera.front" android:required="false" />

Note: This feature is available in Gingerbread(2.3) and Up Android Version.

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