Check if device has a camera?

This is what I'm using

import android.content.pm.PackageManager;

PackageManager pm = context.getPackageManager();

if (pm.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
}

All sorts of other fun things to test for are available too - the compass, is location available, is there a front facing camera: http://developer.android.com/reference/android/content/pm/PackageManager.html

To find out how many cameras are available on your device, you can call:

import android.hardware.Camera;

int numCameras = Camera.getNumberOfCameras();
if (numCameras > 0) {
  hasCamera = true;
}

Camera.getNumberOfCameras() is static, so it doesn't require actually connecting to a camera. This works since API 9.

Edit:

With the newer camera2 API, you can also call CameraManager.getCameraIdList(), which gives a list of the all the valid camera IDs, instead of just the count.

you should use this to find camera in your device

public static boolean isCameraAvailable(Context context) {
    return context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY);
}