如何检测没有摄像头的可在Android设备？而且如果设备有前置摄像头如何使用它？

How to detect no of camera's available in android device? and also if the device has front camera how to use it?

推荐答案

我的建议是类似doc_180的答案，但应能同时检测前后置摄像头即使是升级Froyo，但如果我没有记错，升级Froyo没有支持前置摄像头，让您总能获得的 frontCam 上升级Froyo一个错误的响应。

What I would suggest is similar to doc_180's answer, but should be able to detect both front and back facing cameras even for Froyo, though if I'm not mistaken, Froyo never supported front-facing cameras, so you'll always get a false response for frontCam on Froyo.

PackageManager pm = getPackageManager();
boolean frontCam, rearCam;

//Must have a targetSdk >= 9 defined in the AndroidManifest
frontCam = pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT);
rearCam = pm.hasSystemFeature(PackageManager.FEATURE_CAMERA);

编辑：刚刚意识到这是真的，真的老问题。哦，好吧，希望这可以帮助别人的未来。

Just realized this is a really, really old question. Oh well, hopefully it helps someone in the future.