android判断设备是不是有相机

通过PackageManager可以判断android设备是否有相机！

		PackageManager pm = getPackageManager();		// FEATURE_CAMERA - 后置相机		// FEATURE_CAMERA_FRONT - 前置相机		if (!pm.hasSystemFeature(PackageManager.FEATURE_CAMERA)				&& !pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT)) {			Log.i("camera", "non-support");		} else {			Log.i("camera", "support");		}