Android:デバイスにカメラがあるかどうかを確認する方法

package com.mkyong.android;

import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Log;

public class FlashLightActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       //setContentView(R.layout.main);

        Context context = this;
        PackageManager packageManager = context.getPackageManager();

       //if device support camera?
        if (packageManager.hasSystemFeature(PackageManager.FEATURE__CAMERA)) {
           //yes
            Log.i("camera", "This device has camera!");
        }else{
           //no
            Log.i("camera", "This device has no camera!");
        }


    }
}