Order button is not binding to firebase
Order button is not binding to firebase I'm creating cart button and cart inside the food order app. I get error after clicking on cart floatingaction button,following is the log cat and CartaAdapter.java. In the logcat I get error on the line 72 and 89. Also the screenshot of expected output is given and error output.i again got error on clicking the Place order button and after giving the addrress.unfortunately stops after clicking on order. error pic1 expected ouput after clicking yes on order pic2 Logcat error java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.example.sharma.digimenu.Model.User.getPhone()' on a null object reference at com.example.sharma.digimenu.Cart$2.onClick(Cart.java:95) at android.support.v7.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android...