怎么打开前置摄像头，我这段native代码是不是写错了，球大神解答

var main = plus.android.runtimeMainActivity();  
var MediaStore = plus.android.importClass('android.provider.MediaStore');  
var Intent = plus.android.importClass('android.content.Intent');  
var intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  
intent.putExtra("android.intent.extras.CAMERA_FACING", 1);  
intent.putExtra("fullScreen", false);  
main.startActivityForResult(intent, 1);

预期结果不对，但是触发了app的onShow,onHide